Sitting on the runway, the velocity of an airplane is equal to zero. when it reaches the end of the runway just before it takes off, the airplane's velocity will be close to 170 miles per hour.
the change in the velocity of the the airplane over time is called its
a.
acceleration.
b.
position.
c.
velocity.
d.
lift off.

This is the number of complete movements of a wave per second.

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?

Which symbol in the first law of thermodynamics represents the sum of the chemical and thermal energy stored in atoms and molecules? a. q b. w c. v d. u