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A 2.0-kg rock initially at rest loses 407 J of potential energy while falling to the ground.
1. Compute the kinetic energy that the rock gains while falling.
2. What is the rock’s speed just before it strikes the ground?
You have a 120g meterstick. A) Where should you place the meterstick atop your finger so it balances? (Express your answer to two significant figures and include the appropriate units.) B) Where's the balance point if you place an additional 150 mass..
Children are playing on a vertical slide that is 10m high. If humps were added to this slide, but the height remained constant, how would this effect the final speed
An eagle is flying due east at 8.9 m/s carrying a gopher in its talons. What is the magnitude of the gopher's velocity as it reaches the ground
Assume a volleyball player claims a hang time of 1.25 seconds. Then that player must be able to jump a vertical distance of what.
At low frequencies the dielectric constant of a medium is 4.4. The speed of light is 2.998 × 108 m/s. Find the speed of low-frequency radio waves in the medium
question cesium atoms are the largest naturally occurring atoms. the radius of a cs atom is 2.62 angstroms. how many cs
A typical sound level for a buzzing mosquito is35dB, and that of a vacuum cleaner is approximately 69dB. Approximately how many buzzing mosquitoes will produce a sound intensity equal to that of a vacuum cleaner?
The focal length of a simple magnifier is 7.60 cm. Assume the magnifier to be a thin lens placed very close to the eye. what is the height of its image formed by the magnifier
A 2000kg car accelerates from 20 to 60km/h on an uphill road. Determine the work done by the engine
Only a small part of an iceberg protrudes above the water, while the bulk lies below the surface. The density of ice is907 kg/m3 and that of seawater is 1029 kg/m3.Discover the percentage of the iceberg's volume that lies below the surface.
A spherical object with a moment of inertia of 0.482mr2 starts from rest rolling down a 3.14-m high incline. what is its linear speed at the bottom of the incline
A transformer on a pole near a factory steps the voltage down from 3600 V (rms) to 120 V (rms). determine the power delivered to the primary
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