Physics Questions and Answers November 30, 2022

Find the Force Magnitude, Rotational Component, Torque, and Nonrotational component for the: - upper arm weight - lower arm weight - hand and DB weight - muscular force

Shoulder Isometric hold at 90 of ABduction (outstretched arm with 20lb weight in hand(already converted in diagram) 20 13 cm 12 cm 3.2 kg 68 cm 42 cm 2 kg 10.9 kg

An airmass off the coast of British Columbia has a temperature of 10C and relative humidity of 95%. It moves eastward into British Columbias interior, and its temperature drops considerably, to -10C. Which of the following would also need to happen to the airmass on its journey east? Please select the correct answer(s) from those listed. A.

A mother and her baby are at the park, and the baby is swinging on a swing. At one point, the mother brings the swing up to her face, momentarily holds it at rest, then pushes the swing. The baby swings away from the mother, and then swings back. If the mother does not move, is she in danger of being struck by the swing? a. No, because

A clever inventor makes a heat engine that uses water/ice as the working substance, taking advantage of the fact that water expands as it freezes. A load is placed on a piston containing "warm" water at 1C; the water is then placed in thermal contact with the ambient air (and ground) at -1C until the water freezes, lifting the weight. The weight

A double loop circuit is shown in the figure below. 30 Ew W 20 330 T 8x 20 30 ww 60 W The Emf Ex 7.00 V and the Emf Ew 19.00 V. Both are shown on the diagram. Calculate the power dissipated in the 6 2 resistor located on the extreme right in the circuit.

A student walks 550 m [N], then 450 m [S40W], and finally 350 m [N50E]. Using the component method, find the resultant (total) displacement). Show your work and round your answer (magnitude and direction) to two (2) significant digits.

A circuit is shown with multiple batteries and multiple resistors and a single capacitor on the far left side between points and h. The potential differences of the three batteries are AV 6 V, AV 9.3 V, and AV 3 V. Assume that the circuit has been connected and running for a VERY LONG TIME already. a. How much current flows through the 3 V

A plane is blown off course by the wind. It ends up with a displacement of 600 miles, 50 East of North. Find the 2 component vectors (east north). The plane traveled The plane traveled miles North (round to the nearest whole number). miles East (round to the nearest whole number).

You have two ExpressRoute Standard SKU circuits configured to use Microsoft peering. The first circuit connects a datacenter in Boston to the East US Azure region. The second circuit connects a datacenter in London to the West Europe Azure region. You need to connect the two datacenters via ExpressRoute Global Reach. What should you do first?

A. Calculate the nuclear binding energy per nucleon of the following isotopes Isotopes He (4.0026 amu) 194W (183.9510 amu) Number 1 2 B. Calculate the nuclear binding energy per nucleon for the following nuclei Number Nuclei 1 2C (nuclear mass, 11.996708 amu) 37 Cl (nuclear mass, 36.956576 amu) Barium 137 (nuclear mass, 136.905812 amu) 2 3 C.

What is the moment of inertia for a ring with a mass of 1300g and inner/outer radii of 12cm/13cm? a .020345 g cm^2 b.101725 g cm^2 c. 203450 g cm^2 d.0101725 g cm^2

V = 119.47 radius r=0.32mm Draw step and calculate... a) the Req of the system b) find the total current I c) calculate the average length of the wire resistors (have to calculate length for individual case and make an average accordingly) d) System power (P), e) the voltage across R1 f) the voltage across R4 g) the current across R2 h) the

Nichrome wire with radius r 0.32 has initial resistance R1o, R20, R30 and R40 as shown on circuit diagram. These value changes during operation as the temperature increases from 20C to 120C. A 120.0 Vdc (battery) is connected to each end.

A stork is flying north with a baby with a horizontal velocity of 20 ms at a height of 2.5 kms above the ground. The stork needs to deliver the baby to a house located 20 kms directly in the storks path, how far away from the house should the stork release the baby. Ignore air friction.

A carpenter carries a 10 kg beam as shown. What downward force does he feel on his shoulder at A What is the minimum force he likely to experience at A and what must he do 160 cm 60 cm 30 cm B

2. A man runs a 100.0 m dash and is timed using three different stopwatches t 12.2 s, t 12.06 s, and t3 12.060 s. Calculate the average speed for each time with the appropriate number of significant figures. Distance Time

Problem 1. The ZSection shown in figure is subjected to the bending moment of M 25 kN N. m. The principal axes y and z are oriented as shown, such that they represent the minimum and maximum principal moment of inertia. Iy 0.960 (10) m4 and 7.54 (103) m, respectively. Determine the normal stress at point P and the orientation of the neutral

Which statement about sunspots is not true? a. Sunspots form mostly at the north and south poles of the Sun. b. Sunspots occur in pairs, with a north and south magnetic pole. c. The Maunder minimum was a time when we had fewer sunspots for more than a generation. d. Sunspots are cooler than their surrounding areas, but still hot enough to glow

A type of concrete used for parking spaces, areas with light traffic, and pedestrian walkways that allows water from precipitation to pass directly through it is: A. two-bag concrete B. architectural concrete C. structural concrete D. pervious/permeable concrete

One 2.0 MW turbine had a monthly production of 850 MWh, while the 200 MW wind farm produced 990,500 MWh for the year. How did the single turbine do compared to the rest of the wind project

I One 2.0 MW turbine had a monthly production of 775 MWh, while the 225 MW wind farm produced 975,000 MWh for the year. How did the single turbine do compared to the rest of the wind project

There is a wind turbine close to Lubbock. The turbine capacity is 2.5 MW, the rotor diameter is 80 meter, and tower height is 115 meters. The Cp is 44.2. The local met tower has 3 cup anemometer at 10meter height. The yearly average wind speed at 10 m is 5.8 ms. a) How much power is in wind at 115 m height in Lubbock (Use the power law for wind

Radio station #1 emits radio waves at a wavelength of 100 m, and radio station #2 emits radio waves at a wavelength of 200 m. How do the transmission frequencies of the two stations compare? a. It is impossible to say without more information. b. Station 1 emits waves with a higher frequency. c. The transmission frequency is independent of the

Find the magnitude of Fe (force on the elbow joint) Answer the following mass of the arm = 2.5 kg mass of the book = 2,2 kg Theta = 129 degrees

Triceps Muscle Biceps Muscle cm 16cm m, 2.5kg CG W. 38cm PHYSICS CG Wo

1. Draw lines that are normal to the interface for each of the dots on these objects 2. Light interacts with a prism according to this diagram a. Which line represents the incident light b. At point 1, which line represents reflected light At point 1, which line represents refracted light C. d. At point 2, which line represents reflected light At

In the following diagrams, several beams of incident light are travelling through air toward acrylic prisms. Predict the path of each beam of light (refraction only, not reflection) and draw normal lines for each point where the light crosses the airacrylic interface. B00 1

A rubber ball of mass 95 g is dropped onto the floor. Just before it hits the floor, its speed is 4.4 ms. It then rebounds upward, having a speed of 3.9 ms just as it leaves the floor. What are the magnitude and direction of (to two significant digits) (a) its momentum just before hitting the floor kgms direction,(b) its momentum just after

Which of the conductivity values below is associated with the best electrical conductor? a. 0 S/m. b. 1.3 x 10-18 S/m. c. 2.2 S/m. d. 5.8 x 107 S/m.

As you move the plates closer together, does the stored energy increase or decrease? Does that mean you would need to do positive work to push the plates together or pull them apart? Explain.

If you consider a single GPS satellite beaming a radio signal to a point on the earth. how many points on the earth are the same distance from the satellite? a. Only one b. Three e. Four c. An infinitely large number d. if you connect the points it would be in the shape of a circle.

How does a GPS device determine its location on (or at some altitude above) the Earth? a. By triangulating from two known positions b. Through a process called trilateration using four satellites c. By measuring the phase difference between two radio signals transmitted from a satellite d. By using an inertial sensor to determine the distance and

A ID infinite square well is defined in the region of 0 x 2. At t 0, a particle is placed at the central location (i.e., at x TT) of the well. (a) Write down the initial wave function of the particle. (b) Derive the wave function for the particle at an arbitrary time t. Leave your result as a summation.

Consider a magnetic dipole, M, in the presence of an applied main magnetic field, B=B0k, where k is the unit vector in the z-direction. Assume that initially, M is at equilibrium, has length M0 and is aligned with the main magnetic field (along the z-direction). Describe (or sketch) the position of M in a frame rotating at 0 = B0 for the following

In Practicals you send a cart of mass 0.55 kg along a track with an initial velocity of +72 cm/s. It rolls for a while, then it collides with a fixed forcesensor at the end of the track, and reverses its direction. Shown is the Motion Sensor data giving the velocity versus time. The sensor was set to record 60 samples per second. Which of the

Velocity (cms) 80 60 40 20 0 20 40 60 0 0.5 IT 1 1.5 Time (sec) 21 2 2.5 13 3

In "Earthquakes", what seismic monitoring instrument utilizes laser light beamed at reflectors to measure distances across a very broad area on the San Andreas fault? a. duplex pendulum b. seismograph c. geodimeter d. gravimeter e. creep meter

What happens to the energy expenditure of a device if you increase the Beacon Order (BO)? Select one: a. There will be more collision, which causes a device to spend more energy b. The superframe length will be longer causing a device to spend more energy c. It saves more energy d. It expends more energy e. A device wakes up more frequently

Draw a free body diagram for the bolded object in the given scenario. Label each force with both its name (for example, weight) and the associated FA on B version. A person rappelling down a vertical cliff side is held in place by a rope connected to their harness (that pulls upwards). They press their feet against the cliff, which is to the right

Youre taking part in a cheesewheelrollingdownahill competition. These two cheese wheels have the same radius and length, but the one on the right has been hollowed out and has about 13 the mass of the one on the left. Assume all cheese wheels have sufficient structural integrity to reach the bottom of the hill without falling apart. Decide which

On an alien world, they measure distance in fleeps and time in florps. If 1 fleep 1.7 m and 1 florp 0.9 second, how many fleepsflorps is 15 ms How many ms is 10 fleepflorp

You solve a problem finding the acceleration of a car starting from a stop. You get a result of 2.5 ms. Is this a reasonable result Many cars go from 0 to 60 mph in about 10 seconds.

While conducting research into the design of a light sensor, scientists measure the kinetic energy of photoelectrons that have been ejected from an unknown metal surface. The metal is exposed to various frequencies of EMR and the stopping voltage is measured to obtain the kinetic energy of the photoelectrons. The following data is obtained.

SpaceX launches an experimental rocket vertically up from rest. The engine initially provides a constant net acceleration of 20m/s2. After 5.0 s, the engine cuts off and the rocket continues upward solely under the influence of gravity. What maximum elevation (measured from the ground launchpad) does the rocket reach?

What is the motion of a golf ball as it falls? Does it maintain a constant velocity through its fall, or does it accelerate and get faster as it falls?

Derive the Laue diffraction conditions that follow from photon momentum conservation Ak G, and energy conservation in elastic scattering 2k G G. .

suppose you replace the 5 2 with a 1000 resistor. How will the voltage drop across the 100 resistor compare to that across the 10 2 resistor What will be the total voltage drop across the two resistors

Given than the formula for calculating kinetic energy (KE) of an object is: where, Mass of the object, V = The velocity of the object, Write a PHP program that makes use of variables to compute the kinetic energy of an object. Use any decimal number values of your choice for the input variables.

Set up the circuit and set the resistance to 10 ohms and the battery voltage to 9.0 V. Suppose you added a second 10 ohms resistor in series. What do you predict the voltage will be? What will the total voltage drop across the two resistors?

2. Using Right Hand Rule 1, determine the magnetic force direction for each of the three situations shown. 90 (a). Positive charge 90 (b) Positive charge 90 (c) Negative charge 3. The figure below shows a proton moving in a uniform magnetic field directed out of the page. B 27.5 mT and v 250.0 ms. B a) Draw the force vector in the figure for the

Fill a uniform cylindrical container such as a drinking glass with water and place a ruler into it. Make sure the walls of the container are parallel. (You do not need to do the measurements as the data for the measurements are provided below) Record the water level before inserting the penny.y 60ml Place the penny into the water and record the

What's one of the biggest advantages of using a vacuum cleaner with a bag over a bagless vacuum? a. Its easy to get shocked by static electricity buildup when emptying a bagless vacuum b. Emptying a cup or holding bin in a bagless vacuum can release dirt back into the air c. bagless vacuums aren't as sturdy as standard vacuum cleaners d. There is

10 k6 In figure 1, the surface and pulley are considered to be frictionless. a. What is the acceleration of block A b. What is the acceleration of block B c. What is the tension Fr in the string 3. Consider an opposing force of friction of 10 N to be present between block A and the surface in figure 1. A FT a. What is the acceleration of block A

Consider the pulley in figure 2 to be frictionless.. a. What is the acceleration of block A b. What is the acceleration of block B c. What is the tension Fr in the string 16 K6 A 223 16 FT 5. Assume the surface in figure 3 to be frictionless. What is the tension Fr, in the string pulling block A A B F Fig. 2 2 ks 5. KG D Fia 3

Find the minimum initial height at which the car can be released that still allows the car to stay in contact with the track at the top of the loop. Round your answer to the first decimal place. Your Answer units D

In the early 20th century, it was discovered that the interaction of light with Blank 1 is only possible at certain values depending on the substance. While for a gas the energy level diagrams appear as Blank 2 steps, for solids and liquids they are much more Blank 3 as they are subject to changes in pressure and temperature. The branch of physics

Provide all the steps to get Vf of A from the equation

MADOA MAULA (cos 65) UfA DOA cos 65 sin 65 tan 37 52 MAUIA (sin 65) sin 37 6.97 ms sin 65 lan 37 cos 65( (cos 37) 4.29 ms

Potassium40 decays to 40 Ar with a halflife of 1.3 10 years. What is the age of a lunar rock sample that contains these isotopes in the ratio 33.4 atoms 40K 66.6 atoms 40 Ar Assume that no argon was originally in the sample and that none has been lost by weathering.

A 0.5kg particle moves with velocity v 2i 6j 4k ms. At a given time, the particle is at position r 1.0i 0.5j 0.2k w.r.t. the origin point (0,0,0). Calculate the magnitude of the angular momentum of the particle about the origin. Please round to two (2) decimal places.

The light emitted by a light bulb consists of a mix of all the colors in the spectrum. What happens when this light strikes the surfaces of objects inside a room? a. The light is completely absorbed by the objects b. The objects reflect or scatter the light, with the colors they absorb or reflect determined by their material properties c. The

If a charge of 3 x 106 C were allowed to fall through a potential difference of 500 V, the change in potential energy for the charge would be 1.5 x 104 Joules. 1.5 x 104 Joules. O1.5 x 103 Joules. 1.5 103 Joules.

Three resistors of 15 ohms each are connected in series across a 12 V battery. What is the total Current, and voltage. O2.18 Amps and .02 Volts 26 Amps and 4 Volts 4 amps and .3 Volts 26 Amps and 12 Volts

You admire an art installation of a traveling wave on a string in a museum, which is created by a machine that oscillates the string. You take a picture of it, which is shown above. Taking more pictures of it, you observe that two photos look the same if they are taken exactly one second (or any integer multiple of one second, but not less) apart.

An electric iron uses 8.0 A of current and has a power rating of 1100 W. The resistance of the iron is 138 Ohms. 8800 Ohms. 17 Ohms. 0.0072 Ohms.

A capacitor consisting of two parallel plates separated by 2.0 cm has a potential of 40 V on the top plate and a potential of 0 V on the bottom plate. The electric field in the middle is O2000 NC, downward. O 40 NC, downward. O 20 NC, upward. O 80 NC, upward.

A technologist is performing an assay at 250 nm. The spectrophotometer being used is equipped with a hydrogen lamp, glass cuvettes, a diffraction grating and a photomultiplier tube. When trying to set 100%T using the blank solution, no transmitted light reaches the detector. What should the technologist do? a. change to a tungsten lamp b. set 0%T

Second Example Hit "Reset" to run the same collision again, with m1 = 1 kg, m2 = 1.5 kg, v1 = 5 m/s, HOWEVER, change elasticity = 0% to simulate an inelastic collision, where the objects "hit and stick" Run the simulation and pause it after the collision to record the speed of the blocks A) v1' = + 2 m/s & v2' = + 2 m/s B) v1' = 0 m/s & v2' = +

To think about the energy in the Nittany bouncer, draw bar charts showing the gravitational and spring potential as well as kinetic energies at three locations at the very top (from where the car is released), halfway down, and at the very bottom of the cars trajectory along the track. Although you are free in general to choose the zero of

What does this mean Potatoes generate electricity by acting as a "salt bridge,"" between electrodes, with the pH5 of the electrolyte converting chemical energy into electrical energy Explain.

The force shown in the forcetime diagram acts on a 3.4 kg object. Fx (N) 4 3 2 1 0 1 2 3 4 5 Find the impulse of the force. Answer in units of N s. 0 . t (s),Find the final velocity of the particle if it is initially at rest. Answer in units of ms. Find the final velocity of the particle if it is initially moving along the x axis with a velocity

Two ice pucks (one orange and one blue) of equal mass are involved in a perfectly elastic glancing collision as shown in the figure below. The orange puck is initially moving to the right at vi 6.05 ms, strikes the initially stationary blue puck, and moves off in a direction that makes an angle of 8 35.0 with the horizontal axis while the blue

A hockey goalie is standing on ice. Another player fires a puck (m = 0.17kg) at the goalie with a velocity of 43.1m / s, (a) If the goalie catches the puck with his glove in a time of 2.61*10^ -3 s what is the magnitude of the average force exerted on the goalie by the puck ? (b) Instead of catching the puck, the goalie slaps it with his stick and

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of 16m / s while the exiting water stream has a velocity of - 16m / s The mass of water per second that strikes the blade is 44kg / s Find the magnitude of the average force exerted on the water by the blade.

One type of kinetic energy is thermal energy or heat energy. It is the energy of atoms moving. Atoms are the building blocks of all matter and they make up everything around us. Atoms are always moving. The faster the atoms move, the hotter something becomes. Which sentence from this paragraph explains HOW atoms affect temperature? A. One type of

If the highest frequency of electrical signal output by a torque sensor is 740 Hz. An A/D converter samples the electrical signals. The sample frequency is f = 1200 Hz. What is the lowest apparent frequency due to aliasing? If we want to avoid this aliasing problem by using an anti-aliasing filter, what should be the cutoff frequency of the filter?

A student (m = 74kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest a time of 0.04s The average force exerted on him by the ground is +18000 Where the upward direction is taken to be the positive direction From what height did the student fall? Assume that the only force acting on him during

As of 2008, 42 people have survived a fall from a height above 10,000 feet without a parachute. Without air resistance, a person would hit the ground with a speed of 240 m/s (540 mph!). However, by placing your body in a skydiving position (see photo), you can maximize your cross- sectional area and take advantage of the drag force to limit your

In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer spce. From stationary positions, they push against each other. Bonzo flies off with a velocity of 1.2m / s while Ender recoils with a velocity of - 2.9m / s Determine the ratio m Bonrd /m Ender. the masses of these two enemies.

The work done by a conservative force on a body depends a. only on the path taken b. only on the end points of the path c. only how fast the body moves d. only on how much time to achieve a displacement e. none of the above f. all of the above Two identical arrows, one with speed twice the other, are fired into a hay bale. The faster arrow will

D 45 400 lb 15 C Determine the reactions at A and the force in BD. Correct units are required.

an initial velocity A golf ball, resting on a tee on the ground, is struck by a famous golfer, giving it Vo V0.x voj Assume that the ball moves without air resistance. Describe its motion using a Cartesian coordinate system with its origin located at the balls initial position.,Determine the vertical component of the initial velocity, Voy, in

A basketball shooting guard launches a freethrow with initial velocity vo 3.5 ms at an angle 15 above the horizontal. Use a Cartesian coordinate system with the origin located at the position the ball was released, with the balls horizontal velocity in the positive x direction and vertical component in the positive ydirection. Assume the

In a time of 2.92 h, a bird flies a distance of 74.1 km in a direction 19.8 degrees east of north. Take north to be the positive y direction and east to be the positive x direction. Express your answers in kmh.,Part (a) What is the x component of the birds average velocity,Part (b) What is the y component of the birds average velocity

After being left by his crew on an island in the Caribbean, Captain Sparrow built a raft to escape and set out to sea on it. The wind is quite steady, at first blowing him due east for 19 km and then 14 km in a direction 12 degrees south of east. Certain that he will eventually reach safety somewhere to the east, he falls asleep. When he wakes up,

A two-stage rocket moves in space at a constant velocity of 4830m / s The two stages are then separated by a small explosive charge placed between them. Immediately after the explosion the velocity of the 1370-kg upper stage is 5570m / s What is the velocity (magnitude and direction) of the 2330 -kg lower stage immediately after the explosion?

The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires a gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.011 kg and its velocity is 675m / s Her mass (including the gun) is 52 kg. (a) What recoil velocity does she acquire in response to a

Why are large glass lenses more challenging to use in refracting telescopes? a. glass lenses are not transparent, b. glass lenses cause chromatic aberration, c. glass lenses are to expensive for large telescopes, d. glass lenses deform under their own weight

Just like water needs pressure to force it to move through a hose, electrical current requires pressure to flow. This electric pressure is measured in a) ohms. b) amps. c) watts. d) volts.

In the circuit below, the voltage settings are E 7V, E 9V, and E3 9V, and each resistor is set as R 1102, R 1602, R3 1502, R 140, and R5 1502. C R D www 8 R B WR F www Rs E What is the current through R3 Write your answer with 2 places behind the decimal and be sure to include unit.

Radiant barrier roof decking reduces attic temperatures in the summer. It works by a. trapping heat before it can get to the attic b. decreasing the emissivity of the roof c. reflecting solar radiation away d. Increasing the albedo of the roof

In 1956 Artur Frost wells could serve as a model for diatomic molecules suggested that two Dirac delta V(x) a 8(xa2) 8(xa2). (a) Sketch the potential (just a sketch, no need to do a computerplotted graph). Note that a and a are positive. (b) Suppose in particular that h ma Solve the energy eigenvalue equation (assuming bound states E 0) and find

Even liquids and solids are slightly compressible. A common phenomenological form for the volume as a function of pressure is V(p) Ver(PPo) where K, is the isothermal compressibility. Find G(p) in terms of V., P., , and the current pressure p. (you may express your answer with a term G (P) which you have not been given.),KT for liquid water is

Two insulated current-carrying wires (wire 1 and wire 2) are bound together with wire ties to form a two-wire unit. The wires are 2.70 m long and are stretched out horizontally parallel to each other. Wire 1 carries a current of I 1 = 8.00 A and the other wire carries a current I 2 in the opposite direction. The two-wire unit is placed in a

A 0.0139-kg bullet is fired straight up at a falling wooden block that has a mass of 4.22 kg. The bullet has a speed of 570 m/s when strikes the block. The block originally was dropped from rest from the top of a building and had been falling for a time t when the collision with the bullet occurs. As a result of the collision, the block (with the

I attach a spring scale to my yoyo, and spin it in a circle. The yoyo weighs 0.35 kg. The string is 0.9 meters long. If the spring scale says that Im pulling it with 9.7 N of force, what velocity is the yoyo moving at

We had lab but how do I find theta in this case? These are the values I did on my experiment: Cart's weight = 289.2 grams or 0.2892 kg The "Step 6" acceleration that I calculated turns out to be: 0.846 m/s^2. Also from my previous calculations in the earlier parts of the lab, the theta from the hypotenuse between H and L is 8.75 deg. I'm

So far, we assume that the value of g is the accepted value of 9.8 mss. From the vector diagram shown in Figure 3, the acceleration of cart is the component of g along the direction of the ramp. Thus the acceleration measured in Step 6 can lead to the value of g using the relation H g 6 a sino gsine 0 Figure 3 How does the value of g obtained this

Adolf and Ed are wearing harnesses and are hanging at rest from the ceiling by means of ropes attached to them. Face to face, they push off against one another. Adolf has a mass of 110 kg, and Ed has a mass of 73 kg. Following the push, Adolf swings upward to a height of 0.68 m above his starting point. To what height above his own starting point

Describe a nonpharmacological life experience that was so thrilling to you that you felt completely euphoric. Discuss your responses in terms of endorphin release in the brain. Is there an evolutionary advantage to having increased levels of endorphin activity at certain points in our lives What would be the advantage of having vivid memories of

For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air Because of the air jets, the friction impeding the horizontal motion of the platform is negligible . Each time the heart beats, blood is pushed out of the heart in a direction that is nearly parallel to the platform. Since momentum must

Two coast gaurd rescue stations are located on a straight shoreline, 25 miles apart. both stations send a rescue boat to assist a stranded ship out to sea. the rescue boat from the southern station travels at N 22 degrees E to reach the ship. The resuce boat from the northern station travels S 65 degrees E to reach the ship. How far away is the

We had a cart on an elevated ramp attached with a friction block. The mass of the cart is 289.2 g (or 0.2892 kg), the elevation between the desk and the ramp is 13.5cm (or 0.135m), and the mass of the friction block is 127.2 g (or 0.1272 kg). The length of the ramp/track is roughly 100cm. Our lab had the following questions: 1. What is the

13.5cm H h X isdem 0 x 0 K 08.75 L L100cm m289.2g

In the figure, four point masses are placed as shown (2.0 kg, 4.0 kg, M1, and M2). Take M1 = 8.0 kg and M2 = 6.0 kg. a) Find the x and y coordinates of the center of mass (CM). Show your work. b) Compute the moment of inertia of the four masses about the CM. Do so without using the parallel axis theorem. Show your work. c) Compute the the moment

y 2.0 m 3.0 m 3.0 m M 0 2.0 m 2.0 kg 2.0 m 4.0 kg 3.0 m M 3.0 m 2.0 m

The article promotes the importance of funding at the elite level of sport to enhance performance outcomes. Do you believe more money is needed to be invested in elite sports in Hong Kong, or is it better to also invest in other stages of the athletic journey? Provide reasons to justify your answer.