In order for a combustion reaction to occur, like the burning of fossil fuels, what element is required?

Sulfur

Hydrogen

Oxygen

Helium

Calculate the distance travelled by a car travelling at 56 m/s for 2 minutes

Why doesn't the air around you crush objects such as your desk?

What TWO properties of force can be shown using a force arrow?

How fast does a 3 kg rocket accelerate if a force of 140 N is applied?

Scientists think the moon was formed when a. a large object struck Earth, and ejected material from the collision combined. b. gravitational forces attracted a moon formed elsewhere in space. c.

If I get a spare in one frame and then roll a 1 and 5 in the next frame, what would my score for the spare be? A 10 B 11 C 16 D17

2x^2:3=dg solve for x

A 2.25-kg block is released from rest on a ramp of height h. when the block is released, it slides without friction to the bottom of the ramp, and then continues across a surface that is frictionless except for a rough patch of width 15.

Which of the following are steps for balancing chemical equations? Check all that apply. ] A. Multiply the reactants to get the products. B. Change subscripts. O C.

1. Why does the water vapour in clouds condense? 2. Explain why you can see clouds but not see the water vapour in the air