An object with a mass of 100 g is in free fall. What is the speed of the object after it has fallen for 4 seconds?

A. 39 m/s

B. 9.8 m/s

C. 25 m/s

D. 96 m/s

How much heat is needed to raise the temperature of 1 kg of iron from 25 degree to 30 degrees?

I have to match 1-9 with the words listed below 1. made of two protons and two neutrons 2. similar to an electron; positive charge 3. orbits nucleus; negative charge 4. bundle of energy; zero charge 5. found in nucleus; positive charge 6.

A car increases its speed from 4.20 m/s to 8.60 m/s over 3.20 seconds. What is the car's acceleration?

What physical sign did you observer when you plucked each rubber band? did you hear any sound? What produce the sound?

Using software, a simulation of a javelin being thrown both on Earth and on the moon is created. In both cases, the velocity and angle of projection are kept the same. On Earth, the javelin covers a distance y.

Which statement is true about light when it slows down upon entering another medium A. Light bends less, and there is a greater refraction B. Light bends more, and there is a greater refraction C. light bends less, there is a less refraction D.

Why can you cross sentran type of animals

The element in an incandescent lightbulb that releases light energy is

A soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an empty soda bottle (volume of 2.0 L) at room temperature (25 0C), what will the new volume be if you put it in your freezer (-4.0 0C) ?

What causes attraction between molecules of liquid water?