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A hammer slides down a roof of angle theta (respect to ground). It slides along the roof distance D. As it leaves the roof, a height H above the ground, it has velocity in both directions. Find how far from the base of the building the hammer lands.
What mass of water at 29.0°C added to a Styrofoam cup containing two 60.0 g ice cubes from a freezer at -16.0°C will result in a final temperature of 5.00°C for the drink? Explain it.
An athlete swims the length L of a pool in a time t1 and makes the return trip to the starting poisition in a time t2. (a) If she is swimming initially in the positive x-direction, determine her average velocities symbolically in (a) the first hal..
A heat pump has a coefficient of performance of 3.85 and operates with a power consumption of 6.88 x 103 W. How much energy does it deliver into a home during 2 h of continuous operation
Two bumper cars are driving directly toward one another. The first car, mass m1 = 150 kg, What is the total momentum of the system
A string is clamped at both ends and tensioned until its fundamental vibration frequency is 95Hz. what is the lowest frequency at which it will vibrate
In a photoelectric-effect experiment it is observed that no current flows unless the wavelength is less than 548 nm. What is the stopping voltage required
An electron is accelerated from rest to 5.60x10^6 m/s in 1.50 us by a uniform electric field calculate the work done by the electric field
In a diesel engine, the piston compresses air at 302 K to a volume that is 0.0612 of the original volume and the pressure that is 46 times the original pressure. What is the temperature of the air after the compression.
A small steel sphere of mass 0.40kg is attached by a 5.0m long cord to a swivel pin set into the surface of a frictionless table top. What is the magnitude of the centripetal accerleration of the sphere
Two objects attract each other gravitationally with a force of 2.5 x10-10 N while they are 0.33 m apart. Their total mass is 4-kg. Find out their individual masses.
You throw a ball with mass 0.40 kg against a brick wall. It hits the wall moving horizontally to the left at 30. m/s, find the average horizontal force the wall exerts on the ball during the impact
What intensity level of the horn's sound is observed by somebody waiting at an intersection 58m from the train.
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