Why is a convex lens useful for starting fires

A 20 N unbalanced force causes an object to accelerate at 1.5 m/s2. What is the mass of the object?

Why is it important to know that air is a fluid?

Chlorine is the atomic number 17 in the periodic table of elements. What information does the atomic number give you about the element chlorine? A) An atom of chlorine has 17 protons+. B) An atom if chlorine has 17 protons + and electrons-.

Coal is a major fossil fuel which is mined in many countries around the world. Which of these is most likely to happen if coal is stacked near mines? a. groundwater will get heated up due to coal b.

What has greater inertia baseball or bowling ball

Velocity is: а - speed and direction. b - distance divided by time. c - always the same as speed. distance multiplied by time. d - distance multiplied by time

The gauge pressure in each of the four tires of an automobile is 230 kpa. if each tire has a "footprint" of 180 cm2 (area touching the ground), determine the mass of the car.

A bus travels 20 KM and 30 minutes what is average speed of the bus

What is the total number of atoms in the following formula? CaBr2

A lifeguard on a beach observes that waves have a speed of 7 m/s and a distance of 4.6m between wave crests. what is the period of the wave motion?