after a cannonball is fired into frictionless space, the amount of force needed to keep it going equals

What's the acceleration if the average velocity is 3.5 and the time is 8.7

A closed system consisting of 2 lb of a gas undergoes a process during which the relation between pressure and volume is pVn = constant. The process begins with p1 = 15 lbf/in. 2, ν1 = 1.25 ft3/lb and ends with p2 = 60 lbf/in. 2, ν2 = 0.5 ft3/lb.

2) A sprig with a length of 15 cm and stores 110 J of potential energy when stretched to a new length If the sprig constant is 350 N/m. Find the new length of that spring

Along with an alpha particle what other product is produced in the alpha decay of americium-241

Which best describes a graph of voltage over time for DC current? sine curve straight, horizontal line parabolic curve sawtooth wave

Describe how the competition between invasive and native species might affect a food web

Which vector should be negative? any vector whose magnitude is less than 1 a displacement in the direction North any vector whose magnitude is greater than 1 the velocity of a falling object

Acceleration is a scalar quantity true or false

Find a numerical value for rhoearth, the average density of the earth in kilograms per cubic meter. Use 6378km for the radius of the earth, G=6.67*10-11m3 / (kg⋅s2), and a value of g at the surface of 9.80m/s2.

The driver of a car traveling at 32 m/s applies the brakes and undergoes a constant deceleration of 2.25 m/s^2.