Which of the following causes high and low tides on earth?
a.
the moon's gravitational pull on earth causes water to bulge on two sides of the earth.
b.
water swells when tsunamis occur in two areas of earth at the same time.
c.
the earth's rotation is so fast, water will swell and shrink twice a day.
d.
the earth is tilted on an axis, causing water to spread unevenly throughout the planet.

Phase changes are chemical changes. true or false

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec