What is the name given to this group of elements?

9

F

17

CI

35

Br

53

85

At

a. halogens

b. alkali metals

C. transition metals

d. noble gases

When someone throws a ball, the action force is the person pushing on the bar what is the reaction force?

The speed of a moving bullet can be determined by allowing the bullet to pass through two rotating paper disks mounted a distance 87 cm apart on the same axle. From the angular displacement of 21.

A physics professor is pushed up a ramp inclined upward at 30.0° above the horizontal as she sits in her desk chair, which slides on frictionless rollers. the combined mass of the professor and chair is 85.0 kg. she is pushed 2.

An AC generator has a maximum output emf of 4.20 x 102 V. What is the rms emf? (Remember ΔVrms = 0.707Vmax)

Which 90% of your brain would you like to remove while driving a car? Explain/defend your answer.

Define Mechanical energy. Using an example of the pendulum, explain how kinetic and potential energy relate to the mechanical energy at different positions.

A 8 kilogram cat is resting on top of a bookshelf that is 2 meters high. What is the cat's gravitational potential energy relative to the floor?

A piece of wood has a volume of 4.6 cm to the power of 3, and a mass of 3.7 g what is the density of the wood

For the reaction a → b, the rate law is: rate = k * [a]. over the course of 4 minutes, the concentration of a reduces by one-half, from 1.00 mto 0.50 m. how is the rate affected?

The color of a substance is a physical property