In preparation for an electrophoresis procedure, enzymes are added to DNA in order to

1.) Convert the DNA into gel

2.) Cut the DNA into fragments

3.) Change the color of the DNA

or 4.) Produce longer sections of DNA

What is the specific heat of a substance if 130 kj of heat is needed to raise 6.6 kg of the substance from 18.0 ∘c to 37.2 ∘c?

What linear speed must an earth satellite have to be in a circular orbit at an altitude of 159 km?

How much heat per second h (=qÎ't) flows from the boiling water to the ice-water mixture? express your answer in watts?

T = mg + ma solve for a

A box of books with mass 43 kgkg rests on the level floor of the campus bookstore. The floor is freshly waxed and has negligible friction. A bookstore worker applies a constant horizontal force with magnitude 25 NN to the box.

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.