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A 300kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. What is the tension in the vertical main cable supporting the piano
A commuting student leaves home and drives to school at an average speed of 41.0 km/h. What is the average velocity for the entire trip
A 117 kg fullback runs at the line of scrimmage. How fast was he running initially
A capacitor of value C is connected across a battery of voltage V. The capacitor is fully charged. Find the new charge on the capacitor
A glass lens (nglass = 1.52) has a 136 nm thick anti-reflective film (nfilm = 1.33) on one side. What is the largest wavelength of the light that is totally removed by the film
Blocks of mass 20, 80, and 240 kg are lined up from left to right in that order on a frictionless surface so each block is touching the next one. What is the magnitude of the force that the left blo
A 1300-kg car moving on a horizontal surface has speed v = 55km/h when it strikes a horizontal coiled spring, What is the spring stiffness constant of the spring
Start from the expression of the electric filed outside an infinite sheet of uniform surface charge density, E=sigma/2epsilon, derive the electric field
A 96.0 Kg man stands on a bathroom scale in an elevator that is accelerating upward at a rate of 1.90m/s^2. What is the bathroom scale reading in lbs
A football is kicked from ground level and lands 57.0 m downfield. What max heigh above the ground does the ball reach
The huge volcanic eruption on the island of Krakatoa, Indonesia, in 1883 was heard on Rodrigues Island, How long did it take (in seconds) for the sound to travel to Rodrigues
A device uses a Stirling cycle on 433 moles of a monatomic ideal gas between two reservoirs with temperatures of 416 K, How much work is done by the device on the gas
A parallel plate capacitor has a capacitance of 1.5 microFarad with air between the plates. What is the dielectric constant of the material
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, Find the instantaneous acceleration of the puck
A 6.0-cm-diameter circle lies in the xz-plane in a region where the electric field is E =(1200i^+1200j^+1200k^)N/C
a mass M is hanging from two strings. There is a tension of 34 N in the string on the left and a tension of 24 N in the string on the right. How heavy is the object
A rollercoaster car has a mass of 600 kg when fully loaded with passengers. what is the force of the track on the car at the top of the hill
Highg power lasers in factories are used to cut through cloth and metal. One such laser has a beam diameter of 1.50 mm, Find the power delivered by the laser
A large, cylindrical roll of tissue paper of initial radius R lies on a long, horizontal surface with the outside end of the paper nailed to the surface. Determine the speed of the center of mass of
A tennis player hits a 1.45 kg tennis ball with a racket of mass 2.5 kg. what impulse did he imply on the ball
An elevator cable breaks when a 975 kg elevator is 24.5 m above the top of a huge spring (k = 8.00 x 10^4 N/m) at the bottom of the shaft. Calculate the amount the spring compresses
Photographic cameras on spy satellites supposedly can read the license plate of a car on the ground. How large is the diameter of the camera required for such a feat
Find the speed an alpha particle requires to come within 4.0x10-14 m of a uranium nucleus. Find the energy of the alpha particle
An 80 kg skydiver falls through air with a density of 1.15 kg/m3 . Assume that his drag coefficient is C=0.57. What are the terminal speeds in both cases
In your lab is a steel vessel having a volume of 15.0L you charge the vessel with 2.00 moles of H2 and 1.00 moles of O2. What is the partial pressure of the hydrogen