investigations never involve hypotheses.

Using what you have learned about energy transformations, explain why the driver of a car has to continuously apply pressure to the gas pedal in order to keep the car cruising at a steady speed, even on a flat road.

Convert from standard form to scientific notation: 0.00000013 A) 1.3 x 10-7 B) 13 x 108 C) 1.3 x 107 D) 13 x 10-8

What is the change in the atomic number when an atom emits an alpha particle?

Object A is negatively charged. Object A and Object B repel. Object B and Object C attract. Object C and Object D repel. What type of charge does Object B, Object C, and Object D possess?

In a classroom demonstration, two long parallel wires are separated by a distance of 2.25 cm. One wire carries a current of 1.30 A while the other carries a current of 3.15 A. The currents are in the same direction.

15 grams of liquid plastic are frozen in a physical change that increases the volume. What can be known about the plastic after the change?

A Car is lifted a certain distance in a service station and therefore has potential energy relative to the floor. if it was lifted twice as high, how much potential energy would it have?

How long does it take a 750-w coffeepot to bring to a boil 0.75 l of water initially at 11°c? assume that the part of the pot which is heated with the water is made of 280 g of aluminum, and that no water boils away?

An electric motor rotating a workshop grinding wheel at a rate of 151 rev/min is switched off. Assume constant angular deceleration of magnitude 2.23 rad/s 2. Through how many revolutions does the wheel turn before it finally comes to rest

1. What is the atomic number of an atom? Why is this number important? |