Physics Questions and Answers November 27, 2022

2. Click on one vector and drag it into grid. This first vector is V. Let magnitude of V be 5 units V 10 units, and direction, 8 be 10 70. Record data in Table 1 below. 3. Click on the same color vector as in (2) above and drag another vector into grid. This second vector is V. Let magnitude of V be 10 units V 20 units, and direction, be 100

200 400 600 X nm 800 1000 1200 A transmission spectrum from a nonmagnetic nonabsorbing thin film in vacuum is shown. Given that a0.848 and b1.000, and the spectrometer has been normalized to 1, estimate the refractive index of the film.

Three forces act simultaneously on point J. One force is 10.0N north; the second is 15.0N west; the third is 15.0N 30.0 east of north. Determine the magnitude and direction of the resultant force.

The autocorrelation functions of two different emitters were measured, for a sequence of excitation powers, as shown below function function 25 20 10 05 0.0 2.5 20 1.5 1.0) as 00 25, 20 15 1.0 05 0.0 100 100 re 0 0 0.2 mW 100 200 300 1.0 mW 100 200 5.0 mW 100 0 100 delay(ns) 300 2001 300 Green emitter 2.5 20 15 1.0 0.5 aol 25, 20 1.5 1.0 0.5 0.0

A student records the following secondorder autocorrelation function from a single photon source 1.0 0.8 0.6 0.4 0.2 25 25 Delay time (ns) A. Is the excitation continuous wave or pulsed, and what is the corresponding repetition rate B. Estimate the approximate purity of the source C. Estimate the approximate fluorescence lifetime of the source

3. Examine the charge distribution in the diagram below. 4.0 x 105 C N 24cm q1 q2 24cm 2 2.0 x 105 C 4.0 x 105 C a. Determine the net force charge acting at q1 ( 2.0 x 105 C), caused by q2 ( 4.0 x 105 C) and q3 (4.0 x 105 C). Be sure to include a free body diagram representing the force acting at q1 in your solution. b. Determine the net

There are 5 velocity-time graphs, one for a cart on an incline, one for a student jumping in the air, one for a mass oscillating on a spring, one for an oscillating pendulum, and one for a ball tossed in the air. What are two differences and two similarities between the 5?

Position (m) 0.40 Velocity (ms) 0.35 0.30 0.25 KQ 0.3 0.2 0.1 0 0.1 0.2 0.3 0.5 0.5 1.0 1.0 1.5 1.5 2.0 2.0 2.5 Time (s) 2.5 3.0 3.0 n 3.5 3.5 4.0 4.0 4.5 4.5 5.0 5.0

A frictionless pistoncylinder connected to a linear spring is filled with saturated liquid ammonia at some temperature (Tsat, Psat). When the piston touches the bottom of the cylinder, the spring is slightly compressed. The spring constant is K, and the cylinder has a uniform cross section A. The system is heated constantly by an external heat

Which statement is correct? a. Laplacian of magnetic vector potential is zero. b. The vector magnetic potential is always perpendicular to the direction of the current. c. The algebraic sum of all the magnetic fluxes flowing out of a junction in a magnetic circuit is zero. d. Reluctance is independent of the permeability.

The best way to lower peak incident pressure and the reflective wave is? A. Decrease distance of detonation B. increase the distance of detonation C. reflective wave does not matter D. peak incident pressure does not cause damage

Aside from baseflow, how can water return to the surface naturally? a. By ground subsidence. b. By flying from the ground, like flying insects. c. As springs and artesian wells. d. By being pulled up in wells.

We have 2 aluminum disks with masses m1 , m2 and Radii R1 , R2 . if R2=5.1 R1 and the disks have equal moment of Inertia . what is m1/m2 equal to ? Show complete working

A solid dielectric sphere has a uniform charge distribution with total charge Q, radius R, and dielectric constant . It is surrounded by an uncharged spherical dielectric shell with radius R and dielectric constant 62, which is surrounded by vacuum, as seen below. Let V 0 at R inf. (a) (b) (c) (d) 0 1 R 2 What is E(R) for R R What is V(R) for R

What is the purpose of variable inlet or stator guide vanes? a. Reduce engine airflow at low RPM b. Increase engine airflow at low RPM. c. Reduce engine airflow at high RPM. d. Increase engine airflow at all RPM.

What is the maximum temperature at which ice is likely to form in a turbine engine inlet? a. 40F in dry air and 45F in visible moisture b. 40C in dry air and 45C in visible moisture c. 70F in dry air and 75F in visible moisture d. 32F in both dry air and visible moisture

The motion parallax illusion involves a moving object in which the pilot sees a. close in objects remaining stationary while distant objects appear to move rapidly in the opposite direction. b. close in objects moving by rapidly in the opposite direction the pilot is moving, c. while distant objects appear to move in the same direction or not at

12 identical cars are all honking their horns which a microphone measures to be 91.0 dB. If only one car honks its horn, what sound intensity level will the microphone record? Express you answer in dB to 1 decimal place but do not include units in your answer. Assume all cars are the same distance from the microphone.

Steve has a mass of 85 kg and wears size 11 shoes. The bottom of each of Steve's shoes has an area of 0.03 m2 (approximately 30 cm by 10 cm). What pressure do the soles of Steve's shoes exert on the ground when (a) he is standing still? (b) he is standing on one leg? (c) he is in the process of jumping (with both feet on the ground), and thus

An atom has a negative charge on it. What parameter is generally most important for determining its relative basicity? a. the type of atom that bears the negative charge b. the negative charge on the atom participates in resonance c. how inductive effects destabilize the charge d. how inductive effects stabilize the charge e. In general, all these

What variables associated with the object itself does the moment of inertia depend on? Does your investigation show a pattern that illustrates the dependence of the moment of inertia on mass, size, or shape of the object?

If viewing a graph of an action potential and its phases, when is repolarization? a. During the downward slope from positive 30 millivolts down to around negative 55 millivolts. b. During the smaller downward slope from around negative 55 millivolts down to negative 90 millivolts. c. During the upward slope from around negative 55 millivolts up to

4. Weve talked a good bit about quantum mice, but were not done yet. Lets add time dependence to the discussion. Well work in the size basis, where we have the operators and eigenstates W (10), 1 ( 33), 14) A (s) (66). 135 (2), Recall that W is the size operator, with eigenvalues, 2 and 10, corresponding to small and large mice, and A is the

A tuning fork is set up near the end of an air-filled tube of variable length as shown. By changing the length, various positions of maximum loudness (resonances) can be found. The difference in tube length between adjacent maxima is found to be 10.0 cm. (a) What is the wavelength in air of this sound? (b) What is the frequency of the tuning fork

A pumpmotor system is used to transfer water (p 62.4 lbmft 6.72x10 lbmft.sec) at a steady rate of 4500 lbmmin from a reservoir to a tank located at an elevation of 110 ft., measured vertically between the respective water surfaces in the reservoir and tank. The transfer is made using a 450 ft long commercial steel pipe with a uniform inside

a) Discuss the origin of quantization of the energy for a particle confined to move within a onedimensional box using physical arguments. b) Discuss the origin of quantization of the energy for a particle confined to move within a onedimensional box using mathematical arguments.

A 15-kg block is dragged over a rough horizontal surface by a 70N force acting at 20 degrees above horizontal . The block is displaced 5m and coefficient of kinetic friction is 0.300. Requirement: Find the work done on the block

You do 25 kJ of work on a system consisting of 3.0 kg of water by stirring it with a paddle wheel. During this time, 15 kcal of heat is released by the system due to poor thermal insulation. What is the change in the internal energy of the system

How do you calculate the calculated velocity and predicted range with this data? Provide Step-by-step instruction

DATA Ramp Incline 20 Table 1. Range and Velocity of Projectile at Ramp Distance 1 Ramp Distance 0.240 m 1 2 3 4 Average Table 1. Range and Velocity of Projectile at Ramp Distance 2 Ramp Distance 0.200 m Measured Distance (m) 0.312 m 0.309 m 0.308 m 1 2 3 0.337 m 0.339 m 0.338 m 0.338 m 0.338 m 4 Average 0.307 m 0.309 m Table 1. Range and Velocity

If you double the plate area, by w7. Reduce the plate separation distance by half (move the plates closer together). By what factor does the capacitance change? hat factor does the capacitance change?

(L/D)MAX is the point where a. Parasite Drag and Induced Drag are equal b. Parasite Drag is greater than Induced Drag c. Parasite Drag is less than Induced Drag d. The aircraft attains it's highest speed.

How does outside air temperature affect the operation of variable inlet or stator guide vanes? a. Colder temperatures cause them to open or move to a higher pitch at a lower N2 speed b. Colder temperatures cause them to close or move to a lower pitch at a lower N2 speed c. Colder temperatures cause them to open or move to a higher pitch at a

What is the pressure at a depth of 1 m in water? what happens to the pressure as you go deeper? how does the pressure at 1 m depth depend on the density of the liquid? (Try moving the Fluid Density slider.) Measure the pressure at the surface of the water and 2 m depth for Mars, Earth, and Jupiter. (Move the second slider). Make a table of your

A charge of 3.00 C is located at the top location a distance d 11 mm, a 2.50 C located at the origin and 2.00 C located to the right along xaxis a distance d 12.2 mm. Calculate a) the diagonal line of the arrangement, then b) imagine a reference point P along that line a distance of 16.00 mm and calculate the force at that point, c) calculate

At T 300K, 1bar of 00 in a 1m box (lengths a ay a, 1m) can be considered as an ideal gas. In that case, the average translational energy in each dimension for a molecule is given by EEE KT where k1.38 x 10 JK is the Boltzmann constant. The average rotational energy about an axis perpendicular to the OO bond is ErtkT, and the average vibrational

Suppose an ambulance produces a sound level of 80 at a distance of 100 . How many ambulances would need to be at the same position in order for the sound level at this distance (100) to exceed the threshold for hearing damage (125)

A signal Pin=1 mW is fed to the port 1 of an amplifer. For the amplifier, |s21|=23 dB . How much power is obtained to the load in port 2? Both ports are perfectly matched with the normalization resistance of 50

A 6.0-kg particle moves to the right at 4.0 m/s as shown. Find the angular momentum(vector) of the particle about the point.

6 kg 4 ms 12 m 30 O

Consider 2 rings, both of mass m, that slide without friction along 2 bars, arranged as shown in the figure, forming an angle 2 between them. The rings are joined together by a spring with an elastic constant. k. At the initial instant, the compression of the spring is d and the rings are at rest at a height h above the vertex formed by the two

k quing m 2 m h BD

Determine the normal tensile stress and shear stress due to the load (P) and the distribute force (w) acting on the simple beam AB (Figure 3). Data are as follows P 6 kN, w 10 kNm, L 3.2 m, a 1.7 m, d 1.25 m, b 80 mm, t 25 mm, h 120 mm, and h1 90 mm. Point (44) is in the same position of the neutral axis. W a Figure 3 B h1 2 3 5 b 3 4 5 2 h

Mopeds are generally not licensed. However, in some states, a moped is required to be licensed if Selects one: A. It is used on off-road terrain. B. It is used on public roadways. C. It is powered by an engine and has no pedals. D. It exceeds permissible speed or horsepower limits.

What are the two meteorological variables used in the Heat Index? a. None of these are correct b. Wind speed and temperature c. Pressure and wind speed d. Temperature and humidity e. Humidity and pressure

The lubrication force on a disk of radius a at a small separation h from a plane was derived in class FL Fzez, where F 6W and W dhdt is the velocity of the disk toward the plane. 14 a t h wwwmx.a. A. Suppose that F is positive and constant (to balance an applied force pushing the disk toward the plane). Integrate the above expression subject to

In the presence of Quanta, a disgruntled student throws a bottle toward the pillar in the classroom. a. What is the height at which the bottle makes contact with the pillar b. What is the speed of the bottle at the moment of impact with the pillar 1.85m 15 ms 25 14 m h H,Ax Xf Xo V Ax Xf Xo tfto At At t Ax x Xo X Xovt v is constant 1 Votat X

(c) A spring whose stiffness is 890 Nm has a relaxed length of 0.64 m. If the length of the spring changes from 0.54 m to 0.93 m, what is the change in the potential energy of the spring Change of potential energy J Part 4 (d) You observe someone pulling a block of mass 48 kg across a lowfriction surface. While they pull a distance of 4 m in the

You put 1.08 liter (1.08 kg) of roomtemperature (20C) water (Cwater 4190 JkgK ) into an electric pot that is turned on and transfers heat to the water. Using a beater, you actively stir the water, doing work on the water. You observe that after 4 minutes, the water starts to boil (temperature 100C). From the manufacturer, you know that the

During 4 hours one winter afternoon, when the outside temperature was 10C, a house heated by electricity was kept at 21C with the expenditure of 50 kwh (kilowatthours) of electric energy. (a) What was the average energy leakage in joules per second (watts) through the walls of the house to the environment (the outside air and ground) watts (b) The

What item does the EPA Footprint Calculator suggest to help you keep the temperature in your home a bit higher in the summer and cooler in the winter, to cut down on heating and cooling energy usage? a. programmable b. thermostat c. bags of ice d. a fan

During his shift at the Home Depot, Matt exerts a 643-N force upon a 144-kg crate to accelerate it across the loading room floor. If the coefficient of kinetic friction is 0.328, calculate the acceleration of the crate.

3 Figure 3 shows an archer standing on the top of a castle tower. The castle stands on horizontal ground. He fires an arrow horizontally at a speed of 55 ms from a height of 30 m above ground level. 30m Figure 3 Assume air resistance is negligible. Calculate a the time taken for the arrow to reach the ground time..... b the distance from the base

Satellite-based LIDAR systems a. Can measure the height of ice sheets on the earth's surface b. Can measure cloud structure c. Can measure aerosol particle plumes d. All of the above

What is this coastal landform (N 37.90743 W 122.68005) and what is its length? a. This sand spit is about 2 km long b. This landform is a combination of a sandspit and a wavecut platform that is about 500 m long. c. This sand spit is about 250 m long. d. This wavecut platform is about 2 km long

What is the source of emphasis on the speed of light in quantum theory possibility of connection? A. Newton's theory of gravity B. Newton's theory of motion C. Aristotle's view of motion D. Bell's theorem E. Einstein's theory of relativity

An air bubble of radius 5.5 cm is released from the mouth of a diver. At the divers depth the pressure is 1.20 atm (Well learn in chapter 13 why the divers depth affects the pressure) As it rises to the surface, the air inside the bubble does 8.938 J of work. The bubble rises so quickly to the surface that this process can be treated as being

(a) Consider f(x, y, z) x yz, g(x, y, z) x xyz y, Compute the gradient and the Laplacian of both f and g. Simplify each result. Show your work. (b) Define 0). 0). B 1. Which direction does E point 2. Which direction does B point 3. Which direction does Ex B point 4. Compute V. E and V. B. 5. Compute V E and V B. Which direction do each of

Why is a wind turbine not 100% efficient? a. It cannot extract all the mechanical energy from air. b. It blocks the motion of air entirely. c. Air cannot pass through its blades. d. It cannot extract all the kinetic energy from air.

In figure on the right, a beam of monochromatic light hits passes through three mediums, crossing two interfaces as shown below. The indices of refraction or material 1 and 3 are n 1.33 and n3 1. The index of refraction of material 2 is unknown. At the first interface, between materials 1 and 2, it hits point A at an angle of 50relative to the

A Hooke's Law spring is compressed 15.0 cm by an applied force of 200.0 N. This compressed spring is then used to project a 25.0 g marble straight up into the air To what maximum height does the marble rise? Draw a diagram of situation

Youre out on a warm lovely day (71.6 F), having a picnic with friends, and youve brought along a plastic cooler full of ice. Your friends are going to meet you with pop and water and stuff, but for now its just ice at 0 C. The cooler walls are 2 cm thick, made of plastic with a thermal conductivity of k 0.3 WmK. (a) If heat is flowing into the

Describe the evolution of a pulsar over time, in particular how the rotation and pulse signal changes over time. (Select all that apply.) a. The pulsar loses energy, which decreases its pulse signal. b. The pulsar loses energy, which decreases its rate of rotation. c. The pulsar collapses in on itself, which increases its rate of rotation. d. The

A sphere of fissionable material with its radius R is covered by a spherical shell of aluminum cladding with its thickness R. The total heat flow rate on the outer surface (r2R) of the aluminum cladding was found to be Q. 3a. What is the total heat flow rate on the surface (rR) of the fissionable material 3b. What is the total heat generation rate

Assume everyone in the United stars consumes 7 drink or water from play bottles every day. If there are 330 million Americans estimate how many kilograms of plastic (from soft drink or water alone) need to be recycled each year if each bottle weighs 20 grams

An infinite wire with current I lies on the zaxis, which is coming out of the page in the figure below 12 R LO a b Surrounding the infinite wire is a finite segment of wire with current I. The finite wire consists of a vertical segment with length a, a circular arc (34 of a full circle) with radius R centered on the infinite wire, and a horizontal

A 93 kg object is traveling due north at 14.2 m/s when it begins to experience a constant net force of 1700 N towards the south. How long will it take to stop under the influence of this force?

The simulation assumes that the speed of sound is fixed, so the speed of each moving circle is always the same. Reset the simulation, increase the frequency of the sound to 2.0 Hz, and start it again. What happens to the emitted waves? a. The wavelength decreases. b. The wavelength increases. c. The waves move slower. d. The waves move faster.

Consider the Atwood system shown below in the figure. Treat the pulley as a disk of mdisk 1 kg and radius r 30 cm. The hanging masses are of masses m 5 kg and m 9 kg, respectively. Calculate the angular acceleration (a) of the disk. (Hint Remember the tensions T and T are not equal) m1 m2

1) A block of mass m is initially held in place on a surface a distance L. away from the edge and is attached with a rope over a frictionless pulley to a second block of mass m2. The coefficient of kinetic friction between the block with mass m and the surface is , and the pulley has a radius R, see figure 1. If at time t 0 the block m is allowed

A sports bike and rider with a combined mass of 250kg accelerates uniformly from 100mph to 160mph in a time of 4.2 seconds. Using 1 mile 1600m, calculate a) The acceleration in m.s, b) The effective accelerating force. c) The work done accelerating the truck. d) The increase in kinetic energy of the truck. 3 marks 1 marks 3 marks 3 marks

QI) (a) The angular part of Schrdinger equation is given by 1(11)sin8 Y(0.4) sine (sin (0)) in spherical coordinate ay(0,4) 34 Separate the two variable and write a differential equation for each part. (b) Find the angular momentum operators L., L,and L, in Cartesian face argesher coordinate Hint L Fx p

For an RLC series circuit, the voltage amplitude and frequency of the source are 100 V and 500 Hz, respectively R 550 and L 0.34 H. Find the average power dissipated in the resistor for the following values for the capacitance (a) C 4.0F b) C 0.40 uF.

Consider the track shown in figure. The section "AB" is one quadrant of a circle (1/4 circle) of radius 2 m and is frictionless. B to C is a horizontal span L=3 m long with a coefficient of kinetic friction k=0,25. The section CD under the spring is frictionless. A block of mass 1 kg is released from rest at A. After sliding on the track, it

m 1.0 kg AL 2.0 m L3m D

Select the components used by a bright-field microscope to view a specimen. a. A projector b. Glass lenses c. A stream of electrons d. A light source

The particle motion for a P-wave is best described as a. Shearing motion, a wiggle whose size is not depth-dependent b. Retrograde roll-back elliptical motion c. Snake-like that is greatest at the surface and decreases with depth d. Compressive, like a slinky, like a sound wave

Seismic monitoring is used to detect and locate underground nuclear explosions. For an explosion, what be said about the source mechanism (beach ball) diagram that we will get? a. We cannot say anything about it. b. It will be shaded in both black and white. c. It will entirely be shaded black. d. It will entirely be shaded white.

Which objective lens is used with a sample that has been prepared with a wet mount? a. 100 oil immersion lens b. 10 low-power lens c. 4 scanning lens d. 40 high-power lens

A car with a mass m = 1460 kg is moving at a speed s = 20.1 km/h and needs to stop in a distance d = 28.3 m Write an expression for the magnitude of the net force on the car as it is stopping in terms of the symbols given in the problem statement.

Taking a moment to touch the power supply before working on a computer and every once in a while as you work to keep yourself at the same electrical potential as the computer is a method of _______________. a. self-grounding b. electrostatic discharge radio c. frequency interference (RFI) d. electronic discharge

A balloon contains 65m3 of helium at 100kPa and 22C. The balloon is connected by a valve to a large helium tank at 150kPa and 25C. We open the valve and the helium enters the balloon until it reaches equilibrium with the tank. The balloon is made of a material that allows the volume to increase linearly with pressure. Neglecting heat transfer,

A 1 kg mass stretches a spring 9.8 cm. The mass is acted on by an external force of 4 cos 9t lb. If u(0) 0 and u(0) 0, find (a) u(t) and (b) the number of beats per second.

Atoms are constantly excited and rise to higher energy states/levels than what is called their "base" energy level. The hydrogen atom was used by Rydberg to determine how much energy is released as atoms become excited and drop energy levels. a. Calculate the wavelength that is released by a hydrogen atom when it falls to the second energy level

A 36.0 g sample of an unknown metal at 99.0 C was placed in a constantpressure calorimeter containing 90.0 g of water at 24.0 C. The final temperature of the system was found to be 28.4 C. Calculate the specific heat of the metal. (The heat capacity of water is 4.18 J and heat capacity of the calorimeter is gC 12.4 .) Round your answer to 2

Gasoline at 55.0c is pumped from an underground storage facility into a 12.0-gallon steel gas tank of a car, filling the tank. it is however a very warm day the temperature is 3.00c. assume the car is not driven anywhere and comes into equilibrium with the environment. how much gasoline overflows the gas tank?

On the diagram below add forces to show all the forces acting on the drawbridge and the line of action and lever arm for each force. The drawbridge is uniform with mass M the knight is represented with mass m and is located at L, one quarter of the way across the bridge. You may draw and use the components of the hinge force. Pick the hinge at

A 64.0kg survivor of a cruise line disaster rests atop a block of Styrofoam insulation, using it as a raft. The Styrofoam has dimensions 2.00 m x 2.00 m x 0.0815 m. The bottom 0.025 m of the raft is submerged (a) Draw a force diagram of the system consisting of the survivor and raft. (b) Write Newtons second law for the system in one dimension,

Consider four situations shown to the right with four identical boxes each with mass 1.0 kg. In each case there is a 10 N force applied to the box and in each case the box remains at rest. Rank the magnitude of the normal force, F, exerted by the surface on the box, from the least to the greatest value F refers to the normal force in situation 1,

1. A diver who is 70 meters below water has 1.0 L of air in her lungs. At this depth, the pressure is 8 atm. She holds her breath before she ascends to the surface. What will the volume of her lungs be when she returns to the surface,2. A soccer ball is left outside on a particularly cold day. The temperature outside is 17 F (8.3 C) and the air

When the astronauts go into space, they feel lighter. This is because weight decreases as a person rises above Earths gravitational pull We according to the formula W(h) where We is persons weight in (1 6400 Newtons at sea level on Earth and W(h) is the weight at h kilometers above sea level. At what range of altitude will this astronaut, having

Apply the principles of physics to a roller coaster, and understand how physics influences track design data Coaster car is 6 m long by 1.5 m wide, 1200 kg mass (includes 8 seated passengers). Available space is 30 m wide by 120 m long by 20 m high. The track should be a continuous loop that starts and finishes at one of the lower corners. The

. Given the configuration find the moment of inertia if the system is rotated around m4 Let m1 m m2 m m3 2m m4 2m m a mi 2a m3 m4

A rod is pivoted about its center. A 5 N force is applied 4 m from the pivot at 30 degrees measured from positive x-axis. Another 5 N force is applied 2 m from the pivot at 210 degrees measured from positive x-axis. What is the total torque about the pivot?

If the potential at y too is taken to be zero, what is the value of the potential at a point V at some positive distance y from the surface of the sheet O 0 Eyi

You have tension 98N and angle 30 and beam length of 1.0 m and weight of beam is 10 kg, what is the force of the wall on the rod?

Copper-cored data communication cables are made up of pairs of conductors twisted along their length in order to a) Reduce electrical interference b) Add strength to the cable c) Increase the cable current rating d) Reduce overall cable size

2. An electronic device with a diameter of D 30 mm is soldered on a large metal substrate, as shown in Fig. (A). The substrate has a thermal conductivity of k 180 WmK and is kept at a constant temperature of T 25C. Device D30 mm d) e) Metal substrate (A) T 50 pin fins D, 1.5 mm L 15 mm Metal substrate (8) Copper base t 5 mm thick a) Assuming

A certain plant cell uses a molecular motor to transport large molecules across the cell. The energy for the motor is provided by ATP (adenosine triphosphate). The force exerted by the motor is given by F 7x What is the work done by this motor between the distances of 1 and 3 distance units Hint evaluate the following integral. The unit for work

Alternating current is observed for the electricity supplied to homes and buildings. The current is alternating because A. the charges are made to move back and forth while they simultaneously move to their final destination. B. transformers change the current from direct to alternating. C. the loops of wire at the source of electricity production

The diagram shows a thin rod of uniform mass distribution pivoted about one end by a pin passing through that point. The mass of the rod is 0.700 kg and its length is 1.29 m. When the rad is released from its horizontal position, it swings down to the vertical position as shown. What is the angular momentum of the center of mass of the rod about

Calculate the hydraulic head in Well C. Assuming a hydraulic conductivity of 3 feetperday and 15 porosity, determine the velocity of the water passing through the aquifer. How long would it take water to flow from A to B,500 ft 400 ft 300 ft 100 ft Figure 1.5 In Well A, the depth to water is 40ft. In Well B, the depth to water is 100ft. What is

A 2.50kg cylindrical rod of length 2.00 m is suspended from a horizontal bar so it is free to swing about that end. A solid sphere of mass 0.25 kg is thrown horizontally with a speed v 16.0 ms to hit the rod at the point A onefifth of the way up from the bottom of the rod. The sphere bounces back horizontally with a speed v 9.50 ms, while the

100 BA Co B X 50 1 mile Figure 2.2 Potentiometric Contour Map. Letters represent well locations. Hydraulic Heads A 132 76 95 Calculate the hydraulic gradient from A to B. Calculate the hydraulic gradient from A to C. C D 47 Calculate the hydraulic gradient from A to D. Assuming a hydraulic conductivity of 6 feet per day and a porosity of 0.21, how

A 2.0m measuring stick of mass 0.155 kg is resting on a table. A mass of 0.500 kg is attached to the stick at a distance of 68.0 cm from the center. Both the stick and the table surface are frictionless. The stick rotates with an angular speed of 5.70 rads. (a) If the stick is pivoted about an axis perpendicular to the table and passing through