At the maximum height of a projectile's trajectory-

a) velocity is 0

b) potential energy is 0

c) dot product of velocity & acceleration is 0

d) cross product of velocity & acceleration is 0

Which one of the above is correct?

If two swimmers compete in a race, does the faster swimmer develop more power?

Some waves carry more energy than others. Which wave has more energy allowed sound or quite sound? Why?

Here is a "formula" for building a model airplane: 1 body + 2 wings + 4 jet engines + 1 tailpiece → 1 model airplane if a hobbyist has 88 jet engines, how many wings does he need to assemble all of the engines into model airplanes?

An object falling in air has a weight of 25 N and experiences air resistance of 5 N, the net force on the object is ...

Sound waves travel faster through air than through solids. trur or false

Since you've determined that the power supply is a 700W dual rail, what does that make the maximum output power?

A 2 m length of an aluminum pipe of 240 mm outer diameter and 10 mm wall thickness is used as a short column to carry a 640? centric axial load. Knowing that? = 73? P? and? = 0.

A python can detect thermal radiation from objects that differ in temperature from their environment as long as the received intensity of thermal radiation is greater than 0.60 W/m2. Your body emits a good deal of thermal radiation.

A planet has a mass of about 6.4 x 1023 kg, and its moon has a mass of about 9.6 x 1015 kg. if the magnitude of the gravitational force between the two bodies is 4.6 x 1015 n, how far apart are the planet and its moon? a. 9.4 x 106 c. 4.6 x 109 b. 2.

Is burning a nonrenewable natural gas a chemical change