In order for a reaction to begin, what is required?

activation energy

ionic bonding

precipitate forming

bubbling

A 2.00 m wave has a frequency of 686 Hz. What is the speed of the wave?

A silver bar 0.125 meter long is subjected to a temperature change from 200°C to 100°C. What will be the length of the bar after the temperature change? A. 0.0000189 meterB. 0.00002363 meterC. 0.124764 meterD. 0.00023635 meter

When a cold front passes your loction, the temperature falls as a result air density increases, decreases or stays the same

Is physics the same thing as physical science?

If thermal energy is removed from a system, its temperature usually decreases. a) True b) False

What is the most advanced life form on earth

Which EM wave is about the size of humans?

Describe how the Catapult works?

Newton's third law of motion states that the force pair acting on different objects consist of two forces that

While working on her science fair project Venus connected a battery to a circuit that contained a light bulb. Venus decided to change the light bulb to a higher resistance, but she wanted to keep the current the same.