Definition of the rule E=mc^2

In a summer storm the wind is blowing with a velocity of 8m/s north. Suddenly in 3 seconds, the winds velocity is 23m/s north. What is the winds acceleration?

What is a device made by joining two different materials to form a circuit that produces an electric current? a. convertor b. resistor c. semiconductor d. thermocouple

If an isotope has 8 protons and 10 neutrons in it's nucleus, what is it's atomic mass? A. 18 B. 8 C. 10 D. not enough information to calculate

Rosa records the distance that a toy car rolls and the time it takes to cover the distance. What scientific practice is this?

2x^2:3=dg solve for x

There is a current of 0.99 a through a light bulb when its connected to a 9.7 v battery what is the resistance of the light bulb

After school, several students skateboard at the nearby park. Your best friend, Erwin, is a good skateboarder and happens to fall when attempting a fancy trick. After falling, Erwin gets back up and starts repeating the trick over and over again.

A Hall probe serves to measure magnetic field strength. Such a probe consists of a poor conductor 0.103 mm thick, whose charge-carrier density is 1.11 * 1025 m-3. When a 2.89-A current flows through the probe, the Hall voltage is measured to be 3.

What is the mass of a basketball that is shot with 12N of force at an acceleration of 4m/s2?

What is transferred by electromagnetic waves?