How many galaxies are there in the observable universe?

What earths spheres that interact when runoff from farming areas into local streams

How do earths surface features indicate change over time?

A mover brings a box up the stairs in 10 seconds. If he applied a force of 20 N over a distance 10 m on the box, calculate the power required for him to complete this action. 0.05 watts 201 watts 2,000 watts 20 watts

A child carries a 3N book at a constant velocity of 4 meters across a horizontal floor. What is the net work done? a) 0 J b) 7 J c) 10 J d) 12 J

What is the action force and the reaction force you sit down on a chair

Which phenomenon generates electric current? A black body radiation B ultraviolet catastrophe C emission spectra D photoelectric effect

What is the product of 3.15 m and 2.006 m with the correct number of significant figures?

Consider what happens at the moment when the block leaves the surface of the globe. Which of the following statements are correct? - The net acceleration of the block is directed straight down.

A mechanic pushes a 3.00 ✕ 103-kg car from rest to a speed of v, doing 4,680 j of work in the process. during this time, the car moves 26.0 m. neglecting friction between car and road, find v and the horizontal force exerted on the car.

Explain how latitude determines wind patterns