How many copies of a gene does an organism have in its cells

Identify four regions of the electromagnetic spectrum that astronomers use when observing objects in space.

A crane does 9,500 J of work to lift a crate straight up using a force of 125 N. How high does the crane lift the crate? A 0.013 m B 76 m C 9,400 m D 1,200,000 m

When an atom ion or molecule of a reactant switches places with an unpaired reactant the type of reaction is called?

Which of the following would effect the speed of a wave? A) the matter it travels through B) The amplitude C) the period D) the frequency

A plastic ball of mass 0.200 kg moves with a velocity of 0.30 m/s. This plastic ball collides with a second plastic ball of mass 0.100 kg that is moving along the same line at a velocity of 0.10 m/s. After the collision, the velocity of the 0.

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?