Why does hot air rise?

a spring gun initially compressed 2cm fires a 0.01kg dart straight up into the air. if the dart reaches a height it 5.5m determine the spring constant of the gun

The knights of labor do not believe in arbitration but believed in strikes? true or false

How is the slope derived from the conversion of potential to kinetic energy?

how much thermal energy is absorbed by a copper water pipe with a mass of 2.3kg when its temperature is raised from 20.0 to 80.0?

Define humidity and name two things that increase humidity

A 15.7-g aluminum block is warmed to 53.2 °c and plunged into an insulated beaker containing 32.5 g of water initially at 24.5 °c. the aluminum and the water are allowed to come to thermal equilibrium.

Recombination of white light can be done through glass slab

Which part of a farm system is directly improved by the use of fossil-fuel-based fertilizers? A. air quality B. water purity C. soil temperature D. nutrients and minerals

If the momentum of a 1000 kg car travelling at 10 m/s was transferred completely to a 20.0 kg traffic barrier, what would the final speed of the barrier be a. 40 m/s b. 50 m/s c. 250 m/s d. 500 m/s

2. A cannonball is fired at an angle 0 = 35° to the horizontal, with a velocity of 85 ms 1. a) What is the maximum vertical height reached by the cannonball? b) What is the maximum horizontal range of the cannonball?