A 12-kg sled is moving at a speed of 2.0 m/s. At which of the following speeds will the sled have twice as much kinetic energy? A. 2.8 m/s B. 4.2 m/s C. 6 m/s D. none of the above

The difference between a noise and a musical note is that the noise is. A louder B. of higher pitch C. louder and venally lower pitch D. of irregular pitch

Why is sea-floor spreading and deep-ocean trenches similar?

What determines how atoms combine to form molecules? A. the arrangement of electrons B. the arrangement of nucleons C. the number of protons D. all of the above E. none of the above

Which one would you weigh more if you traveled to two different planets that were exactly the same size/volume but one was made completely of iron and the other swiss cheese? Explain.

A circular swimming pool has a diameter of 12 m. The circular side of the pool is 3 m high, and the depth of the water is 2.5 m. (The acceleration due to gravity is 9.8 m/s2m/s2 and the density of water is 1000 kg/m3kg/m3.

Nanotechnology and microtechnology devices are both very tiny. However, one property of nanotechnology distinguishes it from microtechnology. What is this unique property? Nanotechnology can create new products.

Can an electron be found in an exact spot within an atom

In an ecosystem, why can only one species fill an ecological niche?

The speed of an object and the direction in which it moves constitute a vector quantity known as the velocity. an ostrich is running at a speed of 14.0 m/s in a direction of 54.0 ° north of west.

Adding or removing protons from an atom does what to the atom