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Two children use a homemadetelephone consisting of two paper cups connected by an aluminumwire which is 8.4 m long
a) Determine the time for the sound to travel from one cup to theother.
b) How does this compare with the time for sound to travel the same distancethrough air?
Charges, +q and -q are spaced 1 cm apart. This dipole is centered at the origin, and oriented along the y-axis. The electric field strength at the point (x,y)=(0cm, 10cm) is 360 N/C. What is the charge q? What is the electric field strength at the po..
a thin spherical shel has a radius of 1.9 m an applied torque of 960 Nm gives the shell an angular acceleration of 6.2 rad/s2, what is the rotational inertia of the shell about that axis and what the mass of the shell
Pumped Energy Storage. A water reservoir has surface area A and depth D. The water flows down pipes and through turbines to generate electric power. The bottom of the reservoir is at height H above the turbines.
A bolt comes loose from underneath an elevator that is moving upward at a speed of 6.9 m/s. What is the speed of the bolt when it hits the bottom of the shaft
The pressure in ideal gas is cut in half slowly, while being kept in a container with rigid walls. In the process, 265 kJ of heat left the gas (a) how much work was done during the process. (b) what was the change in internal energy of the gas dur..
An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, Estimate the work done by the snow in bringing him to rest
If the flare is fired at the same angle over the flat Sea of Tranquility on the moon, where g = 1.6 m/s2, describe what is its horizontal range?
A diving board oscillates with simple harmonic motion of frequency 3.23 cycles per second. What is the maximum amplitude with which the end of the board could vibrate in order that a pebble placed there not lose contact with the board during the o..
A box of 350N weight is at rest at the bottom of the plank that is 6.0m long and rises 30 degree above the ground. what is the velocity of the box at the top of the plank
Katherine is attempting a biceps curl with a 100 N dumbbell. She is standing upright, and her forearm is horizontal. What torque is created by the dumbbell about the elbow joint
High-speed stroboscopic photographs show that the head of a 240 g golf club is traveling at 44 m/s just before it strikes a 46 g golf ball at rest on a tee. Find the speed of the golf ball just after impact
Pitcher throws 0.15kg baseball. What is the approximate speed of the pitch, if force exerted by pitcher is 30N
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