Which is an element? Select one: a. salt b. carbon dioxide c. salt water d. carbon

After walking across a carpet, a boy feels a spark between his hand and a doorknob. If the boy's hand is negatively charged just before he touches the doorknob, which particles moved from the carpet to his hand (Chose one of the answers below) A

If the refraction index of amber is 1.55, what is the speed of light through amber? (The speed of light through a vacuum is 3.00 x 108 m/s) 1.94 x 108 m/s 0 m/s 4.65 x 108 m/s 5.17 x 10-9 m/s

An uncharged capacitor is connected to the terminals of a 4.0 V battery, and 6.0 μC flows to the positive plate. The 4.0 V battery is then disconnected and replaced with a 7.

What does every magnet possess? A strong magnetic field b north and south poles c iron metal d repulsion

challenge: A 3 kg model airplane is traveling at a speed of 33 m/s ... The operator then increases the speed up to 45 m/s in 2 seconds. How much force did the engine need in order to make this change?

a block of wood has a length of 4 cm a width of 5 cm and a height of 10 cm what is the volume of the wood

Two carts collide on a level, friction-less track. Cart A has a mass of 200 g and is initially stationary. Cart B has a mass of 100 g and is initially moving with a velocity of + 2.0 m/s.

in which sample water do the water particle have more energy:5 grams of ice cubes at - 10°c or 5 of a liquid water at 20°c?

2. What are your chances of survival if you are struck by lightning?

Which of the following happens when a solid changes to a liquid? a. Energy flows from the liquid to its surroundings b. Particles in the solid move from their fixed position and become less orderly c. The solid particles lose energy d.