What is the universe's estimated age

Why does an atom have a net zero charge?

If a projectile is fired straight up at a speed of 10 m/s, the time it takes to reach the top of its path is about A. 1 second. B. 2 seconds. C. 10 seconds D. not enough information to estimate

What type of change occurs you digest your food?

An energy efficient light bulb uses 15 W of power for an equivalent light output of a 60 W incandescent light bulb.

Which statement relates most directly to the second law? 1 - Thermal energy is conserved. 2 - Some thermal energy is lost and some is used to do work. 3 - Thermal energy flows from areas of higher to lower temperatures.

An engineer has the task of producing an aluminum alloy with a density of 3.0 grams per cubic centimeter. She comes up with the perfect alloy and saves a sample of it. Which mass and volume measurements correspond to this sample? 7 g and 2.

What must be your car's average speed in order to travel 235km in 3.25 hours?

At a certain location, the horizontal component of the earth's magnetic field is 2.5 * 10-5 T, due north. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight. Find the speed of the proton.

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.