Two resistanceless rails rest 32 cm apart on a 6.0o ramp. They are joined at the bottom by a 0.60- resistor. At the top a copper bar of mass 0.040 kg (ignore its resistance) is laid across the rails....

A cooling fan is turned off when it is running at 850 rev/min it turns 1500 revolutions before it comes to a stop. (a) What was the fans angular acceleration, assumed constant? (b) How long did it...

The length of a simple pendulum is 0.760m, the pendulum bob has a mass of 365 grams, and it is released at an angle of 12.0o to the vertical (a) With what frequency does it vibrate? Assume SHM. (b)...

The left end of a long glass rod 8.00cm in diameter, with an index of refraction 1.60, is ground and polished to a convex hemispherical surface with a radius of 4.00cm. An object in the form of an...

A slender, uniform, metal rod with mass M is pivoted with out friction about an axis through its midpoint and perpendicular to the rod. A horizontal spring with force constant k is attached to the...

People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes (see Discussion Question Q34.23). (a) Why not?...

On a warm summer day, a large mass of air (atmospheric pressure 1.01 X 105 Pa) is heated by the ground to a temperature of 26.0oC and then begins to rise through the cooler surrounding air. (This can...

Suppose a straight 1.00-mm diameter copper wire could just float horizontally in air because of the force due to earths magnetic field B, which is horizontal, perpendicular to the wire, and of...

How far apart are the dark fringes in Example 24-8 if the glass plates are each 26.5cm long?

A playground merry-go-round has radius 2.40 m and moment of inertia 2100 kg m2 about a vertical axle through its center, and it turns with negligible friction. (a) A child applies an 18.o.N force...

A comet that was seen in April 574 by Chinese astronomers on a day known by them as the Woo Woo day was spotted again in May 1994. Assume the time between observations is the period of the Woo Woo...

A lightning bolt strikes one end of a steel lightning rod, producing a 15,000-A current burst that lasts for 65 s. The rod is 20 m long and 1.8 cm in diameter and its other end is connected to the...

A beam of light traveling horizontally is made of an Unpolarized component with intensity I0 and a polarized component with intensity Ip. The plane of polarization of the polarized component is...

Two crickets, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.50 s, while Milada jumps horizontally with an initial speed of 95.0 cm/s. How far...

How much recoil energy does a 40/19K nucleus get when it emits a 1.46-MeV gamma ray?

A long, thin solenoid has 900 turns per meter and radius 250 cm. The current in the solenoid is increasing at a uniform rate of 60.0 A/s. What is the magnitude of the induced electric field at a...

Two identical loudspeakers are located at points A and B, 2.00 m apart. The loudspeakers are driven by the same amplifier and produce sound waves with a frequency of 784 Hz. Take the speed of sound...

In a common test for cardiac function (the stress test) the patient walks on and inclined treadmill (Fig. 6-46). Estimate the power required from a 75-kg patient when the treadmill is sloping at an...

A rocket is fired at an angle from the top of a tower of height ho = 50.0 m. Because of the design of the engines, its position coordinates are of the form x(t) = A + Bt2 and y(t) = C + Dt3 where A,...

The coefficient of kinetic friction for a 22-kg bobsled on a track is 0.10. What force is required to push it down a 6.0o incline and achieve a speed of 60 km/h at the end of 75m?

A beam of Unpolarized light of intensity 10 passes through a series of ideal polarizing filters with their polarizing directions turned to various angles as shown in Fig. 33.42.(a) What is the light...

A rigid bar ABCD is pinned at end A and supported by two cables at points B and C (see figure). The cable at B has nominal diameter dB = 12 mm and the cable at C has nominal diameter dC = 20 mm. A...

An estimated forcetime curve for a baseball struck by a bat is shown in Figure P9.7. From this curve, determine (a) The impulse delivered to the ball, (b) The average force exerted on the ball, and...

You are asked to design a cylindrical steel rod 50.0 cm long, with a circular cross section, that will conduct 150.0 J/s from a furnace at 400.0oC to a container of boiling water under 1 atmosphere....

Three point charges are arranged at the corners of a square of side L as shown in Fig. 17-25. What is the potential at the fourth corner (point A) Taking V = 0 at a great distance? 1. 7-20 +Q L. +30

A simple pendulum has a length of 0.75 m and a bob with a mass of 0.15 kg. The bob is released from an angle of relative to a vertical reference line (Fig. 5.34). (a) Show that the vertical height of...

A horizontal wire holds a solid uniform ball of mass m in place on a tilted ramp that rises 35.00 above the horizontal. The surface of this ramp is perfectly smooth, and the wire is directed away...

Figure 13-27 shows a diagram of a simple thermostat used to control a furnace (or other heating or cooling system). The bimetallic strip of different metals bonded together. The electric switch is a...

You take your dog clear to the vet, and the doctor decides he must locate the little beast's center of gravity. It would be awkward to hang the pooch from the ceiling, so the vet must devise another...

A certain transverse wave is described by Determine the waves (a) Amplitude; (b) Wavelength; (c) Frequency; (d) Speed of propagation; (e) Direction of propagation. y(x, 1) = (6.50 mm)cos 2 28.0 cm...

For a certain transverse standing wave on a long string, an anti node is at x = 0 and an adjacent node is at x = 0.10 m. The displacement y(t) of the string particle at x = 0 is shown in Figure,...

In Figure, four pulleys are connected by two belts. Pulley A (radius 15 cm) is the drive pulley, and it rotates at 10 rad/s. Pulley B (radius 10 cm) is connected by belt 1 to pulley A. Pulley B'...

Figure gives the magnetization curve for a paramagnetic material. The vertical axis scale is set by a = 0.15, and the horizontal axis scale is set by b = 0.2 T/K. Let sam be the measured net...

The two speakers of a boom box are 35.0 cm apart. A single oscillator makes the speakers vibrate in phase at a frequency of 2.00 kHz. At what angles, measured from the perpendicular bisector of the...

A physics book slides off a horizontal tabletop with a speed of 1.10 m/s. It strikes the floor in 0.350 s. Ignore air resistance. Find (a) The height of the tabletop above the floor; (b) The...

A large box containing your new computer sits on the bed of your pickup truck. You are stopped at a red light. The light turns green and you stomp on the gas and the truck accelerates. To your...

A strand of wire has resistance 5.60. Find the net resistance of 120 such strands if they are. (a) Placed side by side to form a cable of the same length as a single strand, and (b) connected end to...

Consider a particle of mass m whose motion starts from rest in a constant gravitation field. If a resisting force proportional to the square of the velocity (i.e., kmv2) is encountered, show that the...

(b) Assuming E = EO, find the maximum displacement current density in the wire, and compare with 1he result of part (a). (c) At what frequency f would the maximum conduction and displacement...

A 2-lb ball is thrown in the direction shown with an initial speed VA = 18 ft/s. Determine the time needed for it to reach its highest point B and the speed at which it is traveling at B. Use the...

A 15-kg rock is dropped from rest on the earth and reaches the ground in 1.75 s. When it is dropped from the same height on Saturn's satellite Enceladus, it reaches the ground in 18.6 s. What is the...

A person, with his ear to the ground, sees a huge stone strike the concrete pavement. A moment later two sounds are heard from the impact: one travels in the air and the other in the concrete, and...

A meter stick with a mass of 0.160 kg is pivoted about one end so it can rotate without friction about a horizontal axis. The meter stick is held in a horizontal position and released As it swings...

To give a 19-kg child a ride, two teenagers pull on a 3.7-kg sled with ropes, as indicated in FIGURE 5-35. Both teenagers pull with a force of 55 N at an angle of 35 relative to the forward...

(a) Defend the following statement: "In a sinusoidal sound wave, the pressure variation given by Eq. (16.4) is greatest where the displacement given by Eq. (16.1) is zero." (b) For a sinusoidal sound...

A very long, thin strip of metal of width w carries a current I along its length as shown in Figure P30.49. Find the magnetic field at the point P in the diagram. The point P is in the plane of the...

A 450-loop circular armature coil with a diameter of 8.0 cm rotates at120 rev/s in a uniform magnetic field of strength 0.55 T (a) What is the rms voltage output of the generator? (b) What would you...

A cowboy stands on horizontal ground between two parallel vertical cliffs. He is not midway between the cliffs. He fires a shot and hears its echoes. The second echo arrives 1.92 s after the first...

Perfectly rigid containers each hold n moles of ideal gas, one being hydrogen (H2) and other being neon (Ne). If it takes 100 j of heat to increase the temperature of the hydrogen by 2.50C, by how...

The deepest point in the ocean is in the Mariana Trench, about 11 km deep. The pressure at this depth is huge, about 1.13 - 108 N/m2. (a) Calculate the change in volume of 1.00 m3 of seawater carried...

An object has several forces acting on it. One of these forces is F = axyi, a force in the x-direction whose magnitude depends on the position of the object, with a = 2.S0 N/m2. Calculate the work...

In Example 21.4, what is the net force (magnitude and direction) on charge q1 exerted by the other two charges?

A small balcony constructed of wood is supported by three identical cantilever beams (see figure). Each beam has length L1 = 2.1m, width b, and height h = 4b.3. The dimensions of the balcon floor are...

The rocket sled has a mass of 4 Mg and travels from rest along the smooth horizontal track such that it maintains a constant power output of 450 kW. Neglect the loss of fuel mass and air resistance,...

A string is wrapped several times around the rim of a small hoop with radius 8.00 cm and mass 0.180 kg. The free end of the string is held in place and the hoop is released from rest (Fig. 10.46)....

An ideal gas initially at Pi, Vi, and Ti is taken through a cycle as in Figure P20.38. (a) Find the net work done on the gas per cycle. (b) What is the net energy added by heat to the system per...

It has been argued that power plants should make use of off peak hours (such as late at night) to generate mechanical energy and store it until it is needed during peak load times, such as the middle...

The Leaning Tower of Pisa is 55m tall and about 7.0 m in diameter. The top is 4.5 m off center. Is the tower in stable equilibrium? If so, how much farther can it lean before it becomes unstable?...

A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle...

A 0.160-kg hockey puck is moving on an icy, frictionless, horizontal surface. At t = 0, the puck is moving to the right at 3.00 m/s. (a) Calculate the velocity of the puck (magnitude and direction)...

Suppose an object has thickness dp so that it extends from object distance p to p + dp. Prove that the thickness dq of its image is given by (-q2/p2)dp, so that the longitudinal magnification dq/dp =...

A mercury manometer (Æ¿ = 13,600 kg/m3) is connected to an air duct to measure the pressure inside. The difference in the manometer levels is 15 mm, and the atmospheric pressure is 100...

A Coast Guard cutter detects an unidentified ship at a distance of 20.0 km in the direction 15.0 east of north. The ship is traveling at 26.0 km/h on a course at 40.0 east of north. The Coast Guard...

In a slow-pitch softball game, a 0.200-kg softball crosses the plate at 15.0 m/s at an angle of 45.0 below the horizontal. The batter hits the ball toward center field, giving it a velocity of 40.0...

On a Strange temperature scale, the freezing point of water is -15.0S and the boiling point is + 60.0S. Develop a linear conversion equation between this temperature scale and the Celsius scale.

Normal atmospheric pressure is 1.013 X 105 Pa. The approach of a storm causes the height of a mercury barometer to drop by 20.0 mm from the normal height. What is the atmospheric pressure? (The...

A non-uniform beam 4.50 m long and weighing 1.00 kN makes an angle of 25.0° below the horizontal. It is held in position by a frictionless pivot at its upper right end and by a cable 3.00 m...

The long, straight wire AB shown in Fig. carries a current of 14.0 A. The rectangular loop whose long edges are parallel to the wire carries a current of 5.00 A. Find the magnitude and direction of...

Five clocks are being tested in a laboratory. Exactly at noon, as determined by the WWV time signal, on successive days of a week the clocks read as in the following table. Rank the five clocks...

The cable of the 1800 kg elevator cab in Figure snaps when the cab is at rest at the first floor, where the cab bottom is a distance d = 3.7 m above a spring of spring constant k = 0.15 MN/m. A...

Recession of the Moon Careful measurements of the earth-moon separation indicate that our satellite is presently moving away from us at approximately 3.0 cm per year. Neglect any angular momentum...

A hollow, conducting sphere with an outer radius of 0.250 m and an inner radius of 0.200 m has a uniform surface charge density of +6.37 X 10-6 C/m2 A charge of -0.500 C is now introduced into the...

The immediate cause of many deaths is ventricular fibrillation, uncoordinated quivering of the heart as opposed to proper beating. An electric shock to the chest can cause momentary paralysis of the...

A certain fuel-efficient hybrid car gets gasoline mileage of 55.0 mpg (miles per gallon). (a) If you are driving this car in Europe and want to compare its mileage with that of other European cars,...

For the network shown in Figure P28.28, show that the resistance Rab = (27/17) Ω. 1.0 1,0 1.0 3.0 5.0

A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.0C, the resistance of the carbon resistor is 217.3 . What is the temperature on a spring day when the...

In unit-vector notation, what is the torque about the origin on a jar of jalapeno peppers located at coordinates (3.0 m, -2.0 m, 4.0 m) due to? (a) Force F2 = (3.0N) i (4.0N) j + (5.0) k, (b) Force...

The demand for electric power is usually much higher during the day than it is at night, and utility companies often sell power at night at much lower prices to encourage consumers to use the...

A horizontal plank of mass m and length L is pivoted at one end. The planks other end is supported by a spring of force constant k (Fig P15.61). The moment of inertia of the plank about the pivot is...

Sir Lost-a-Lot dons his armor and sets out from the castle on his trusty steed in his quest to improve communication between damsels and dragons (Fig. P12.20). unfortunately his squire lowered the...

Capacitance of an Oscilloscope Oscilloscopes has parallel metal plates inside them to deflect the electron beam. These plates are called the deflecting plates. Typically, they are squares 3.0 cm on a...

A plastic bar ACB having two different solid circular cross sections is held between rigid supports as shown in the figure. The diameters in the left- and right-hand parts are 50 mm and 75 mm,...

Singly charged uranium-238 ions are accelerated through a potential difference of 2.00 kV and enter a uniform magnetic field of 1.20 T directed perpendicular to their velocities. (a) Determine the...

Some rearview mirrors produce images of cars behind you that are smaller that they would be if the mirror were flat. Are the mirrors concave or convex? What is the mirrors radius of curvature if cars...

An object having mass 900 kg and traveling at speed 0.850c collides with a stationary object having mass 1 400 kg. The two objects stick together. Find (a) The speed and (b) The mass of the composite...

A 0.60-kg book slides on a horizontal table. The kinetic friction force on the book has magnitude 1.2 N. (a) How much work is done on the book by friction during a displacement of 3.0 m to the left?...

Jack and Jill are standing on Ii crate at rest on the frictionless horizontal surface of a frozen pond. Jack has mass 15.0 kg, Jill has mass 45.0 kg, and the crate has mass 15.0 kg. They remember...

A childs pogo stick (Fig P8.56) stores energy in a spring with a force constant of 2.50 0 104 N/m. At position A (xA = 0.100 m), the spring compression is a maximum and the child is momentarily at...

What is the likely identity of a metal (see Table 10-1) if a sample has a mass of 63.5g when measured in air and an apparent mass of 55.4 g when submerged in water?

A rod of length 30.0 cm has linear density (mass-per-length) given by = 50.0 g/m + 20.0x g/m2 where x is the distance from one end, measured in meters. (a) What is the mass of the rod? (b) How far...

Consider the street pattern shown in Fig.2-42.Each intersection has a traffic signal, and the speed limit us 50km/h. suppose you are driving from the west at the speed limit. When you are 10m from...

The electric potential inside a charged spherical conductor of radius R is given by V = keQ/R, and the potential outside is given by V = keQ/r. Using Er = -dV/dr, derive the electric field (a) inside...

A loaded penguin sled weighing 80 N rests on a plane inclined at angle ? = 20o to the horizontal (Fig. 6-28). Between the sled and the plane, the coefficient of static friction is 0.25, and the...

In Fig. 6-29, a force P acts on a block weighing 45 N. The block is initially at rest on a plane inclined at angle = 15 o to the horizontal. The positive direction of the x axis is up the plane. The...

For the circuit in Fig. 4.109, find Thevenin equivalent between terminals a and b? 20 20 . 10 20 10 102

The 25-m crane boom AO lies in the yz plane. Determine the maximum permissible tension in cable AB if the absolute value of moments about the coordinate axes of the force exerted on A by cable AB...

A brass rod is 185 cm long and 1.60 cm in diameter. What force must be applied to each end of the rod to prevent it from contracting when it is cooled from 120.0C to 10.0C?

A 50.0-kg block and a 100-kg block are connected by a string as in Figure P8.36. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between the 50.0 kg block and...

A spacecraft flies away from the earth with a speed of 4.80 x 106 m/s relative to the earth and then returns at the same speed. The spacecraft carries an atomic clock that has been carefully...

Firemen are shooting a stream of water at a burning building using a high-pressure hose that shoots out the water with a speed of 25.0 m/s as it leaves the end of the hose. Once it leaves the hose,...