Awater balloon slingshot launches its projectiles essentially from ground level at a speed of 25.5 m/s . (you can ignore air resistance.)

a: at what angle should the slingshot be aimed to achieve its maximum range?

b: if shot at the angle you calculated in part a, how far will a water balloon travel horizontally?

c: for how long will the balloon be in the air?

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

Decreased sensitivity to an unchanging stimulus is known as

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?