1. How much force is required to push an object with a mass of 30 kg a distance of 2 meters? 2. What is the mass of an object that has a weight of 150 N on earth?
3. How much work is done if it takes 980 N of force to lift an object a distance of 2.5 meters?
4. how much power is needed when a crane uses a force of 5.0 X 10^5 N a distance of 3 meters in 150 seconds

What is the fate of the electrons that interact with a specimen in an electron microscope?

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.