An old door is very hard to open until oil is sprayed on its hinges. What does the oils do?

A) It increases the force of friction

B) It increases the force of gravity

C) It reduces the force of gravity

D) It reduces the force of friction

In a video game, a flying coconut moves at a constant velocity of 20 meters/second in the positive direction. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second.

Find a1 if a8=54 and a9 = 60

Which subatomic particles are most involved in chemical bonding? A. Protons B. Electrons C. Neutrons D. Isotopes

Why are scientists most likely working on developing cleaner-burning fuel for cars

A child does 350J of work while pulling a box from the ground up to his tree house with a rope. The tree house is 5.2 m above the ground. What is the mass of the box? A) 4.1 kg B) 6.9 kg C) 6.2 kg D) 5.2 kg

Why cooking pans don't have have metal handles?

Why will marchers at the end of a long parade following a band be out of step with marchers nearer the band

How would you explain photosynthesis to a new student in class

If the abosolute of a gas is 600 k, the temperature in degrees Celsius is

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.