SI base unit used to measure the amount of a substance

The light-gathering capacity of a telescope is dependent on the: A: focal length B: size of human iris C: area of aperture D: magnification

What is tbe sac around the heart

At 5000-kg freight car runs into 10000-kg freight car at rest. they couple upon collision and move with a speed of 2 m/s. what was the initial speed of the 5000-kg car?

A sample of copper has a volume of 23.4 cm3. if the density of copper is 8.9 g/cm3, what is the coppers mass

Two students, standing on skateboards, are initially at rest, when they give each other a shove! After the shove, one student (77kg) moves to the left at 5.7m/s while the other student (59kg) moves right.

Describe the energy transfer when you touch a block of ice with your hand

1: Explain how insurance transfers risk to a third party.

How do you find period when you have frequency

Which electromagnetic waves have a higher frequency than visible light

Calculate the speed for a car that went a distance of 125 miles in 2 hours time