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

minutes?

Which statement best describes comparative and descriptive investigations? They both include a question, procedure and conclusion. They both include a hypothesis. They both require a specified control group.

How does a shiny, silver and smoothsurface reduce the heat loss of a hot object to its cooler surroundings

The Great Lakes of the United States are often covered with a sheet of ice every winter. Which best explains why this ice does not sink to the bottom?

What waves shown on the electromagnetic spectrum disturb the medium it passes through at answer?

An electric current of 202.0 mA Transports 56.0 C of charge. Calculate the time this took.

How are magnetic stripes near mid-ocean ridges evidence for sea-floor spreading?

If a truck has a mass of 2 x 106 grams and a velocity of 35m/s, what is its momentum? kgm/s a. 2 million b. 70 c. 57.14 d. 70,000 e. 57,100

A scientist heats a piece of iron until it is glowing white-hot. he places the metal inside a metal box. he removes all of the air from the inside of the box.

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. 1. gravitational potential energy 2. electrical energy 3. kinetic energy 4. mechanical energy 5. elastic potential energy

The density of sugar is 1.59 g/cm3. the mass of a sample is 4.0 g. find the volume of the sample