If a ball goes at 20 miles per hour what's the velocity

Which process is a form of mechanical weathering

Maglev trains use magnets on the train and guideway to levitate the train off the track. The north pole of the magnets on the train must face the.? A. south pole of the magnets on the guideway so they repel. B.

A child kicks a stone along the sidewalk with a force of 520 newtons. The stone travels 1.5 meters in 0.30 seconds. How powerful is the child's kick? 2,600 W 1,700 W 47 W 1.5 W

6. What is the definition of the word PER?

Although we have discussed single-slit diffraction only for a slit, a similar result holds when light bends around a straight, thin object, such as a strand of hair. In that case, a is the width of the strand.

5. What is the percent composition of sulfur in H2SO4? A. 32.7% B. 65.2% C. 98.1% D. 2.1%

A 0.8kg object accelerate at a rate of4 m/s2. What is the net force acting on a object

Which of the following is the best definition of an isotope? A. elements of the same kind with different numbers of neutrons B. elements of the same kind that have lost electrons C. elements of the same kind that have different electrical charges

Two cars approach each other; both cars are moving westward, one at 85 km/h, the other at 54 km/h. what is the magnitude of the velocity of the first car relative to (in the frame of reference of) the second car? answer in units of km/h.

What usually causes high concentration of minerals to form