Which of the following is considered evidence of a chemical change?

An electric heater operating at 120. volts draws 8.00 amperes of current through its 15.0 ohms of resistance. The total amount of heat energy produced by the heater in 60.0 seconds is (1) 7.20 * 10^3 J (3) 8.64 * 10^4 J (2) 5.76 * 10^4 J (4) 6.

Climate scientists predict that shifting patterns of precipitation and increasing dryness in areas like the american southwest and midwest will result in:

On the sun is the corona above the photosphere?

During a test, what can a student use to identify what type and how many atoms are in a chemical compound? common names chemical names the International Union of Pure and Applied Chemistry the National Chemistry Society

Billy pulls his friend Sue on a sled at a constant velocity with a horizontal force of 200 N. The weight of the sled and Sue is 400 N. Which way will the sled move if Billy suddenly starts to pull with a force of 600 N?

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.

A hydraulic lift is used to lift a heavy box that is pushing down on a 1.5-m2 piston with a force of 1,700 N. What force needs to be exerted on a 0.12-m2 piston to lift the box?

Rauol's friend Johnny sets out from his house in the city. His displacement is 900 m 80° North of west. What is the x component of his displacement vector?

What is the relationship between gravity and mass? What is the relationship between gravity and distance?

A person performs 300 j of work over the course of 60 seconds how much power they did required