Which type of chemical reaction needs to absorb energy to proceed

After an average acceleration of 3.47 m/s 2 during 2.85 s, a car reaches a velocity of 14.5 m/s. Find the car's initial velocity.

You hear a hammer 5 seconds after you see it move. How far away is the hammer?

The energy of atoms and molecules due to their motion is?

A supersonic jet flies 10 miles in 0.008 hours. How fast is the jet moving

A sound wave traveling at STP has a period of. 0023 seconds. The wavelength of this sound is closest to 1) 1.4E5 2) 6.9E-6 3) 0.76m 4) 76m

Which is a possible measurement of the momentum of a moving object? 11 kg∙m2/s2 2.8 kg∙m/s 16 kg∙m/s, due west 9.3 m/s2, due north

Let's say you had a pulley system with a mechanical advantage of 3. If you want to lift a boulder 10 meters off the ground, how far would you have to pull the rope?

For glass fragments to be individualized, what must be true? A. They must fit together B. They must have the same density C. They must look the same D. They must be the same color

In what way would a digital thermometer be preferable to those from a liquid-based thermometer? Digital thermometer readings are easier to use when performing calculations.

Why does the core of the sun contain more helium and less hydrogen than the surface of the sun?