Which substances are responsible for accelerating chemical reactions in cells?

a) amino acids

b) enzymes

c) nucleic acid

d) lipids

Which of these questions is a scientific question about skateboarding? A How fast does a skateboard move at the bottom of a ramp? B. Which color of wheel looks best? C. Should skateboarding be allowed in shopping malls? D.

As you slide a heavy box across the floor, friction applies a force of - 60 N over a distance of 5 m. How much work is done by friction? A. - 55 J B. - 60 J C. - 300 J D. - 15 J

What is the formula for the law of universal gravitation? a. force = g * mass1 * mass2 / distance b. force = g * mass1 * mass2 * distance c. force = g * mass1 * mass2 / distance2 d. force = g * mass1 * mass2 * distance2?

A horizontal force of 300 N is applied to move a 55 kg sofa across a 10 m level surface. What is the net work done by this 300 N force? a. 0 J b. 550 J c. 3000 J d. 16500 J

When two oppositely charged electrodes are immersed in a solution, positively charged ions are attracted to the negative electrode and gain electrons. The negatively charged ions are attracted to the positive electrode and release electrons.

How do you solve for weight in physical science?

Gravity and magnetism are _ forces. A. contact B. field C. tension D. normal

a) What voltage will accelerate electrons to a speed of 6.00*10-7m/s? (b) Find the radius of curvature of the path of a proton accelerated through this potential in a 0.

A proper cool-down routine includes which of the following?

What is a Rift Valley?