How much electrical energy is used by a 75 W laptop that is operating 12 minutes?

When there is a large difference in two resistor's sizes, what useful approximations can be used when considering their series and parallel combinations? (This is a handy thing to know in circuit design!)

What is direct current? In which direction does current go according to the electron flow convention?

What is the mass of 1.0 l of water in grams?

A small immersion heater is rated at 255 W. The specific heat of water is 4186 J/kg⋅C°. Estimate how long it will take to heat a cup of soup (assume this is 250 ml of water) from 17 °C to 62 °C. Ignore the heat loss to the surrounding environment.

Problem: An ice hockey player hits a puck of mass 0.15 kilograms with a force of 100 newtons in the horizontal direction.

In a research facility, a person lies on a horizontal platform which floats on a film of air. When the person's heart beats, it pushes a mass m of blood into the aorta with speed v, and the body and platform move in the opposite direction with speed

What are some ways the oceanic crust and the continental crust are alike?

Why is gangue sometimes reprocessed.

4.7 cm. The tube is sealed at one end and loaded with lead shot to give it a total mass of M = 130 g. The tube floats in water (of density 1 g/cm3) in vertical position, loaded end down.

Why is it incorrect to say that vascular tissue, gametophytes, and fronds are all found mosses