Heat engines converts what type of energy into mechanical energy?

1. chemical

2. thermal

3. nuclear

4. elastic

Calculate the amount of heat (in btu) needed to raise the temp of 2.5lb of glass from 45°f to 350°f. the specific heat capacity of glass is 0.187Btu/lb°f

A simple pendulum is 5.00 m long. what is the period of small oscillations for this pendulum if it is located in an elevator (a) accelerating upward at 5.00 m/s2? (b) accelerating downward at 5.

The smallest part of a compound that still has the properties of that compound is a (n) A. mixture. B. molecule. C. orbital. D. nucleus.

An ocean wave has an amplitude of 2.5 m. Weather conditions suddenly change such that the wave has an amplitude of 5.0 m. The amount of energy transported by the wave is

What class of solid is made up of regularly repeating subunits of tightly packed, orderly arrangement of Atoms, ions, or molecules

A bad case of the tonsillitis can sometimes affect a persons breathing how possible

How gravity affect time? With reference to einstein special theory of relativity

An experiment was performed on a 2-kg block. Forces of 5, 10 and 15 Newtons respectively were applied to the block for 5 seconds. Describe the difference in final speed between the three trials.

Jake designed an experiment to demonstrate a solar eclipse. The steps of the experiment are listed below. Place a light bulb on a stand. Stick a pencil into a small styrofoam ball. Switch on the light bulb and darken the room.

A boat sails an average speed of 20 km/h for 2 days. How far does the boat travel?