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An ideal gas at 20 C consists of 2.2*10^22 atoms. 4.5 J of thermal energy are removed from the gas. What is the new temperature in C?
If the bar makes an angle theta2=45 degree with respect to the X2 axis, what is the length of L1 and orientation of the bar theta1 relative to system S when V=0.98c?
As part of a safety investigation, two 1400 {rm kg} cars traveling at 23 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barre
A bat at rest sends out ultrasonic sound waves at 56.0 and receives them returned from an object moving directly away from it at 25.0. What is the received sound frequency?
Water at ground level is moving at a speed of 1.20 m/sec in a pipe at a pressure of 850 kPa. The pipe goes up to the fourth floor of a building where its elevation is 12.5 meters above the ground a
If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the school, what distance Db would the bird cover?
The amount of internal energy needed to raise the temperature of a quantity of liquid is 555.3J. How fast must a 0.24 kg baseball travel in order for its kinetic energy to equal this internal energy
The amplitude of the wave is 2.0-mm. How much time is required for a particle of the string to move through a total distance of 1.0-km?
An object weighing 313 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 275 N. Immersed in oil, the object weighs 287 N. Calculate the density
Starting from rest, a speedboat reaches a speed of 3.0 m/s in 3.7 s. What is the boat's speed after an additional 2.5 s has elapsed, assuming the boat's acceleration remains the same?
Suppose that a gangster sprays Superman's chest with 3 g bullets at the rate of 115 bullets/min, the speed of each bullet being 450 m/s. Suppose too that the bullets rebound straight back with no ch
A major-league catcher gloves a 93 mi/h pitch and brings it to rest in 0.14 m. If the force exerted by the catcher is 803 N, what is the mass of the ball?
A 98 N grocery cart is pushed 12 m along an aisle by a shopper who exerts a constant horizontal force of 40 N. If all frictional forces are neglected and the cart starts from rest, what is the groce
A circular hole in an aluminum plate is 3.263 cm in diameter at 0.000°C. What is its diameter (in cm) when the temperature of the plate is raised to 129.8°C? Give your answer to four signif
Determine the difference in the binding energy of 3 1H and 3 2He. Answer in units of MeV.
A 100-kg cannon at rest contains a 10-kg cannon ball. When fired, the cannon ball leaved the cannon with a speed of 450 m/s. What is the recoil speed of the cannon?
A flat (unbanked) curve on a highway has a radius of 280.0 m. A car rounds the curve at a speed of 82.0 m/s. What is the minimum coefficient of friction that will prevent sliding?
A 52.0 {rm kg} ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.5 {rm m}.
The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030 kg. What is the magnitude of the gravitational attraction between the two?
What capacitance must be used in this circuit if the time constant is to be 3.4 ms
Using the fact that torque = dL/dt and your result from (b), calculate the acceleration of the counterweight.
A 24 g bullet traveling 290 m/s buries itself in a 3.8 kg pendulum hanging on a 2.7 m long string, which makes the pendulum swing upward in an arc. determine the vertical and horizontal components.
A non-uniform beam is supported by a cable at 35degrees to the beam, (at the end of the beam). The tension in the cable is 300N. The weight of the beam is 250N and it is 2.00m long. Determine the lo
What is the frequency heard by people on the ground below when she has fallen a distance of 11.0 m? Assume that the bungee cord has not yet taken effect, so she is in free-fall.