Why is copper a pure substance

Which is a necessary part input for all heat engines? A) Steam to act as a working substance B) An energy source, such as fuel or electrticity C) A device to generate electrticity D) Luiqid water to act as a working substance

The net force on a 3.2kg toy airplane is 7N. What is the accelerator of the airplane?

A fuel oil tank is an upright cylinder, buried so that its circular top is 14 feet beneath ground level. the tank has a radius of 5 feet and is 15 feet high, although the current oil level is only 14 feet deep.

A cheetah can run at 30 m/s, but only for about 12s. How far will it run in that time

What is weight vs mass

If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? A. The spacecraft will not move because it only works on earth. B.

A fast, white water cascade is also known as what?

What is a stack of membranes that packages chemicals

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?