As one goes from left to right in a period, which of the following is true?

A. The number of protons decreases.

B. The number of valence electrons increases.

C. both A and B

D. none of the above

A swan on a lake gets airborne by flapping its wings and running on top of the water. If the swan must reach a velocity of 6.00 m/s to take off and it accelerates from rest at an average rate of 0.350 m/s2, How long does this take (in seconds)

Which statements describe the factors affecting the strength of an electrical force? Check all that apply. The weaker the charge on two objects, the stronger the electrical force between them.

A train travels 90 kilometers in 1 hours, and then 60 kilometers in 3 hours. What is its average speed

The price at which a nations currency can be bought using another nations currency is known as A. The rate of exchange B. consumer advantage C. globalization D. currency trade

Which of the following instruments is used to measure air pressure? a. barometer b. anemometer c. hygrometer d. thermometer

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to drop? A. The molecules in the water spread apart. B. The molecules in the thermometer's liquid spread apart. C.

The amount of energy carried by a wave is proportional to the square of the wave's A. frequency B. amplitude C. wavelength D. period ... ?

The pressure at the bottom of a jug filled with water does not depend on

at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees?

A record player turntable initially rotating at 3313 rev/min is braked to a stop at a constant rotational acceleration. The turntable has a rotational inertia of 0.031kg? m2.