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A 22.8g bullet , moving initially at 690m/s, penetrates 7.44cm into a solid wall. a) What work is done by the wall while stopping the bullet? b) Assume the force of the wall on the bullet is constan
What is its power output in watts? c) At a food conversion efficiency of 7.44%, how many food calories ( one food calorie=4190 joules) must be taken from the daily diet for the heart?
When light of wavelength 700nm is used in a single slit diffraction pattern , the central maimum has a width of 3.5cm. When the light source is replaced by one of wavelength 500nm, what central widt
A laser beam is shown through a grating and a first order maximum is produced at an angle of 25 degree. At what angle is the second-order maximum is produced?
A point charge q1 = 5.00nC is placed at x = 4.00cm, and a second point charge q2 = -3.00 nC is placed at x= 6.00 cm. a) What is the magnitude and direction of the electric field due to the charges, at
A golfer hits a shot to a green that is 13 m below the point where the ball is struck. The ball leaves the club at a speed of 21 m/s at an angle of 42 degrees above the horizontal. It rises to its m
A 0.440-µF capacitor is connected across the terminals of a variable frequency oscillator. (a) What is the frequency when the reactance is 6.81 kO?
A variable capacitor with negligible resistance is connected to an ac voltage source. By what factor does the current in the circuit increase if the capacitance is increased by a factor of 7.0 and t
How much work does each force perform on the box while the box moves 5 meters?
A 50.0 kO resistor is connected with a 30.0 µF capacitor and a 15.0 V battery with negligible internal resistance. Find the time for the capacitor to be charged from 0 to 75% of its maximum ch
What is the maximum force in N that can be supported by the wire if the design stress is 95.5 MPa and allowable deformation is 1.2 mm? The wire is made from stainless steel.
A 250 g disk moving north at a speed of 8 m/s on a frictionless, horizontal air table collides with a 400 g disk moving east at a speed of 5 m/s. a) what is the magnitude of the total momentum after
A small metal ball with a mass of 4.0 g and a charge of 5.0 mC in located at a distance of 0.70 m above the ground in an electric field of 12 N/C directed to the east. The ball is then released from
A crane lifts a ball weighing 2 x 10^4 N by 40 m in 2 seconds. A) How much work against the force of gravity does the crane do on the ball?
A spring with k = 51 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.9 kg mass is now attached to the end of the spring, where will the end
A projectile of mass 0.879 kg is shot straight up with an initial speed of 27.4 m/s. (a) How high would it go if there were no air resistance? (b) If the projectile rises to a maximum height of only
A 51.6-g golf ball is driven from the tee with an initial speed of 43.9 m/s and rises to a height of 25.4 m. (a) Neglect air resistance and determine the kinetic energy of the ball at its highest po
At the top of the loop, the rider is upside-down and moving, and the sensor reads 320 N. What is the speed of the rider at the top of the loop?
Two balls, of masses mA = 40 g and mB = 64 g are suspended. The lighter ball is pulled away to a 60 degree angle ( in the negative x direction) with the vertical and released. The height from which
An automobile traveling at 20 m/s is approaching a traffic signal. when the driver is 150 m from the intersection, the light changes from green to yellow. Since the light will remain yellow for 5 s,
A soccer ball is kicked from the ground with an initial speed of 19.9 m/s at an upward angle of 48.1°. A player 50.8 m away in the direction of the kick starts running to meet the ball at that i
What are (a) the magnitude of the cat's centripetal acceleration and (b) the magnitude of the cat's average acceleration during the time interval t2 - t1, which is less than a period of the motion?
Two horizontal forces are being applied to a 6 kg object. One force has a magnitude of 10 N and is directed toward the north. the second force has a magnitude of 15 N and is directed toward the nor
What is the shortest time between flashes of light that will make a three-bladed propeller appear stationary when it is rotating with an angular speed of 15.6 rev/s?