A car moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car's acceleration? A. 2 m/s2 B. 15 m/s2 C. 30 m/s2 D. 50 m/s2

We've seen that stout tendons in the legs of hopping kangaroos store energy. When a kangaroo lands, much of the kinetic energy of motion is converted to elastic energy as the tendons stretch, returning to kinetic energy when the kangaroo again

Can we fly if we were falling for two days

Which of the following numbers most closely represents the number of galaxies in the universe? A) hundreds B) thousands C) millions D) billions

A vicious dog is pulling his owner with 150N of force. If the owner is dragged 40 meters, how much work did the dog do?

What is the frequency corresponding to a period of 4.31 s? answer in units of hz?

Oxygen makes up the largest part of living cells at 65%. What is the percentage of the second-most abundant element in living cells?

Shivering to warm up illustrates which characteristic of life? A. adaptation to environment B. homeostasis C. getting energy D. growth

Dante pours hot tea into a mug that is cool to the touch. Which best explains what will happen now?

What type of resource can be regenerated or replenished by biochemicl cycles

How much work is done lifting a 12-m chain that is initially coiled on the ground and has a density 2 kg/m so that its top end is 11 m above the ground? (Assume that acceleration due to gravity is g = 9.8 m/s2.)