What force must the people overcome in order to lift the rock? (rock on one end and two guys on the other end)

A spherical hot-air balloon is initially filled with air at 120 kPa and 20°C with an initial diameter of 5 m. Air enters this balloon at 120 kPa and 20°C with a velocity of 3 m/s through a 1-m-diameter opening.

Which of the following biomes is transitional between desert and forest? taiga savanna temperate grassland tundra

A person standing at the edge of a merry-go-round must hold on tightly to keep from flying off the edge as it speeds up. What name is given to the force that keeps the person moving in a circular path?

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

Which statement is true concerning the evidence for black holes? Scientists can see black holes with powerful telescopes. Scientists can see the effect of black holes on nearby stars. Scientists can see trails left in space by black holes.

Where did the asteroids in the asteroid belt come from?

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False