The main difference between speed and velocity involves

a. distance.

b. weight.

c. direction.

d. gravity.

A 1900kg airplane is flying at an altitude of 510 above the ground. What is the gravitational potential energy in Joules?

Which would describe a situation in which the Doppler effect is occurring? Sheila notices an increase in volume as an object approaches her. Brad hears an object increase in loudness as it is vibrated at its natural frequency.

In an AC circuit that contains a resistor, a capacitor, and an inductor, impedance replaces the DC concept of resistance. Explain briefly the difference between the two quantities.

The change in an object's momentum is equal to

A grindstone increases in angular speed from 6.00 rad/s to 12.20 rad/s in 16.00 s. Through what angle does it turn during that time if the angular acceleration is constant?

Is thin humans more denser than fats?

A small bubble rises from the bottom of a lake, where the temperature and pressure are 4°C and 3.0 atm, to the water's surface, where the temperature is 25°C and the pressure is 0.95 atm.

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed? A. 25 g B. 100 g C. 75 g D. 50 g

Suppose a large truck on a hydraulic lift exerts 7,000 N of force on a piston with an area of 0.4 m2. The piston can only support 16,000 Pa of pressure. How much pressure is exerted by the truck on the piston?

A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.7 m/s2. (a) if the tension in the cord is 63 n, what is the lamp's mass? (b) what is the cord's tension when the elevator ascends with an upward acceleration of 1.