Why does the moon have so many craters compared to the earth?

Two lightbulbs are wired in series and connected to a 12-volt battery. what happens to the current through the battery if a third bulb is wired in parallel with the other two bulbs? to the power?

The early universe contained only atoms of hydrogen. The universe now contains atoms of over one hundred different elements. Explain How The Different Atoms Now Contained In The Universe Were Formed.

A boat leaves the dock at t = 0.00 s and, starting from rest, maintains a constant acceleration of (0.461 m/s2) i relative to the water. Due to currents, however, the water itself is moving with a velocity of (0.485 m/s) i + (2.16 m/s) j.

Which of the following types of radiation has no mass and no charge? a. alpha b. beta c. gamma d. positron

For the winter, a duck flies 10.0 m/s due south against a gust of wind with a speed of 2.5 m/s. What is the resultant velocity of the duck?

Which of the following most accurately represents John Dalton's model of the atom?

A race car travels a circular track at an average rate of 135 mi/hr. The radius of the track is 0.450 miles. What is the centripetal acceleration of the car?

Between a substance and a mixture.

Two massive objects are fixed in position. A third object is placeddirectly between the first two at the position at which the totalgravitational force on the third object due to the two massiveobjects is zero.

Which statement best describes the magnetic properties of a material? Magnetic materials have many spinning, unpaired electrons Paired electrons of magnetic materials can move to other atoms Electrons of magnetic materials are strongly held by