a hammer falls off a roof and strikes the ground with a certain kinetic energy. If it fell from a roof twice as tall, how ouwld its kinetic energy compare? Explain.

Why don't animal cells need chloroplasts? A) Animals do not make their own food. B) Animal cells make their own chlorophyll. C) Animal cells collect sunlight another way. D) Animals use photosynthesis to make their own food.

How is the structure of a unicellular organism different than the structure of a multicellular organism? How does this effect the function

Choose the TRUE statement about momentum. A. An object can never actually have zero momentum. B. An object with a large mass always has a large momentum. C. An object with a small mass always has a small momentum. D.

An unbalanced force of 40. newtons keeps a 5.0-kilogram object traveling in a circle of radius 2.0 meters. What is the speed of the object? (1) 8.0 m/s (3) 16 m/s (2) 2.0 m/s (4) 4.0 m/s

What physical property of nylon and leather make them get materials to use for shoelaces

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?

What is 18 degrees celsius in fahrenheit?

A small object moves along the x-axis with acceleration ax (t) = - (0.0320m/s3) (15.0s-t). At t = 0 the object is at x = - 14.0 m and has velocity v0x = 8.90 m/s. What is the x-coordinate of the object when t = 10.0 s?

Nitrogen and Hydrogen react to form ammonia (NH3). The reaction looks like this: Ammonia What is the ratio of nitrogen atoms to hydrogen atoms in ammonia? 1 to 2 1 to 3 2 to 1 3 to 1

Place the following types of electromagnetic radiation in order of increasing wavelength. ultraviolet light gamma rays radio waves Place the following types of electromagnetic radiation in order of increasing wavelength.