An automobile is able to stop in 20m when traveling at 30 mi/h. How much distance will it require to stop when traveling at the following: a) 15 mi/h (half of 30mi/h)
b) 60 mi/h (twice of 30mi/h)
c) 45 mi/h (three times 15mi/h)
d) 75 mi/h (five times 15 mi/h)​

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

Select all the correct answers. which changes will increase the rate of reaction during combustion? decreasing the area of contact between the reactants adding more oxygen to the reaction removing heat from the reaction changing the reactants from solid form to powdered form lowering the exposure of the reactants to air