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Suppose you stir 1 kg of water until its temperatue raises by 1 degree C. How much work did you do on the water
A rifle with a weight of 25 N fires a 4.0-g bullet with a speed of 240 m/s. Find the recoil speed of the rifle
The electric field at 0.50 m away from the center of a thin metallic spherical shell of radius 0.30 m is - 400×10^3 V/m. the charge density at the outer surface of the sphere is:
A parallel-plate capacitor has circulat plates of 7.00 cm radius and 1.01 mm separation. Calculate the capacitance in picofarads
An ambulance with its siren at frequency 700 Hz is racing down the highway at 50m/s, What is the wavelength of sound in front of the ambulance
A 95.0 N weight is held in the hand. The upper arm makes an angle of 29.0° with the vertical, and the lower arm is 12.0°above the horizontal
A toroidal solenoid has a mean radius of 18.0cm and a cross-sectional area of 3.20cm2 and is wound uniformly with 85.0 turns. What is the mutual inductance of these coils
A water slide launches a child horizontally above a swimming pool. How far from the launch point does the child land in the water
If the floor at the base of a table is very hard, and a tennis ball dropped from the top of the table 1 meter high rebounds with 85% of its velocity
a solid cylinder (M=2.07 kg, R=0.117 m) pivots on a thin, fixed, frictionless bearing. Calculate the angular acceleration of the cylinder
A student throws a 100g snowball at 7.5m/s at the side of the schoolhouse, where it hits and sticks. What is the magnitude of the average force on the wall
A 78.05kg fisherman is sitting in his 33.25kg fishing boat along with his 13.49kg tackle box. What is the recoil speed of the fisherman and his boat
A 9.0-g piece of Styrofoam carries a net charge of -.65mC, What is the charge per unit area on the plastic sheet
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
A cosmic ray electron moves at 7.85 x 10e6 m/s perpendicular to the earth's magnetic field at an altitude, What is the radius of the circular path the electron follows
When a potential difference of 160 V is applied to the plates of a parallel-plate capacitor, What is the spacing between the plates
You are visiting NASA and are watching a test rocket launch. You estimate that at launch the angle of elevation of the rocket is 60 degress, calculate The altitude of the rocket when the engine cut
A boy is standing on a frozen lake (i.e. no friction) holding a rope that is attached to his sled. He pulls on the rope and exerts a horizontal force of 5.2 N, What is the acceleration of the boy
A golf ball of mass 0.045 kg is hit off the tee at a speed of 32m/s. Find the average force exerted on the ball by the golf club
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. What is the period of a satellite in a geosynchronous orbit
A thick cylindrical shell of inner radius a= 5 cm and outer radius b= 10 cm and has a net charge ZERO. Consider 1m length of the cylinder and find the inner and the outer surface charge densities
A 10 kg box is on the flatbed of a truck that is accelerating along a straight horizontal road. What is the max acceleration the truck can reach without the box falling
A 20-kg rotating disk of radius 0.30m has an angular momentum of 0.40kg?m2/s. What is the angular speed of the disk
A projectile is shot vertically from the surface of the Earth. Calculate the final speed of the projectile
The 6.5 kg box has acceleration to the left of 3.50 m/s^2. There is an applied force of 50 N acting on the box. Determine the magnitude of the friction acting on the box