A bike rider (mass = 86.2 kg, with bike

accelerates from rest to 3.15 m/s

over 7.83 m, while exerting a

98.4 N forward force. How much

force pushes back against her

due to friction, etc.?

Question 9. Imagine that a 2 g sample of cobalt, a lustrous grey metal, is heated until it melts. As it is heated, what will happen to the sample? a) Its volume will decrease and its mass will stay the same. b) Its mass and volume will increase.

You can use the curved part of a spoon as a mirror because it

A conducting material must have many free electrons to qualify as an insulator.

5. While working near flammable substances, one should avoid iron or steel hand tools. O (A) True O (B) False

What is the charge on a hypothetical ion with 55 protons and 52 electrons?

Explain how a scientist could change a substance's pH from A. An acid to a neutral. B. A base to a neutral C. Create a salt

What could be put into the center section of this Venn diagram?

You are jumping on a trampoline and it occurs to you that energy is being transferred as you bounce. ( ... sounds like your usual thoughts, doesn't it?) You realize that sometimes you do work on the trampoline and sometimes it does work on you.

What is the weight of atmosphere on Earth?

The noble gases are the least what of any elements on the periodic table