Which of the following is a reversible physical change?

a. burning coal

b. boiling water

c. chopping onions

d. bread rising in an oven

Which have different numbers of electrons? different ions of an element different isotopes of an element the nucleus of an element each of the atoms of an element

What is a disadvantage of using nonrenewable energy resources? A. they cannot be replenished in human lifetime B. they are readily available C. they cause problems with bird populations D. they do not produce greenhouse gases

Which type of fitness is not based on performance

The 0.45-kg soccer bal is 1 m above the ground when it is kicked upward at 12 m/s. If the coefficient of restitution between the ball and the ground is e = 0.6, what maximum height above the ground does the ball reach on its first bounce?

In separate experiments, a large number of particles (all with the same charge, but with a wide variety of masses and speeds) are fired into a region containing a uniform magnetic field.

Two passengers leave the airport at Kansas City, Missouri. One flies to Los Angeles, California, in 3.5 hr and the other flies in the opposite direction to New York City in 3.5 hr.

What is the term for the basic unit of electric current? The basic unit of electric current is the.

When a sailboat overtakes a powerboat, which vessel is the stand-on vessel?

Both matter and energy can eneter and exit which of the following systems? A. open only B. both open and closed C. isolated only D. both closed and isolated

1. Find the charge if the number of electrons is 4 x 10-18