What is necessary to accelerate a 70-kg object at a rate of 4.2m/s2?

How much thermal energy must be added to a 1.4 kg piece of lead to convert it from a solid to a liquid at 327.5∘? Latent heat of fusion for lead is Lf=2.32*104J/kg.

An 80-kg man climbs a 6-m ladder in 12 seconds. what is his average power expended?

Approximately how much energy is contained in 1 g of matter? A. 3 * 1013 J B. 9 * 1013 J C. 3 * 1016 J D. 9 * 1016 J

Sound can pass from one paper cup to another through a long, taut string that connects their bottoms. What type of wave is present in the string when your voice shakes the bottom of your cup in and out and your friend hears your voice from the other

A 30 Newton object is placed into a bowl of water. If the 30 Newton object displaces 20 Newtons of water, what is the 'apparent weight' of the 30 Newton object in the water? (What force is required to lift it)

Which branch of science includes the laws of matter and energy?

A very famous motorcyclist plans to jump across a canyon 3.5 kilometers wide. he plans to use a 30 degree ramp and leaves it at 196 m/s. Will he make it? show all calculations to prove your answer

What captures energvy from sunlight during photosynthesis

The scientific theories developed by copernicus galileo and newton resulted in

How could you find out which wire is broken in a cable?