A witch throws a frog into a cauldron with an initial speed of 4m/s in the horizontal direction. The cauldron is 2 m away. What was the vertical speed of the frog?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is