When was the first ozone hole discovered

Moving water, like that of a river, carries sediment as it moves along its bed. The faster the water flows, the more sediment that is carried and the larger the sediment particles.

If u accomplished 10,000 newton meters of work how much work did you do in units of joules

A beverage can is thrown upward and then falls back down to the floor. As usual, a y axis extends upward (positive direction). Which of the following best describes the acceleration of the can during its free flight?

Use the periodic table and your knowledge of isotopes to complete these statements. When polonium-210 emits an alpha particle, the child isotope has an atomic mass of ___. I-131 undergoes beta-minus decay.

What causes winds to form?

Lightning occurs when there is a flow of electric charge (principally electrons) between the ground and a thundercloud. assume that the rate of charge flow in a lightning bolt is about 24000 c/s and this lasts for 105 µs or less.

If F1 = 390 N and F2 = 550 N, determine the angle θ (0∘≤θ≤180∘) between them, so that the resultant force has a magnitude of FR = 780 N. Express your answer to two significant figures and include the appropriate units.

How are Global winds and Local winds similar?

A patient needs to take 375 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 375 mg dosage?

How long would it take the Earth to complete 4 orbits around the Sun?