Question 30 According to the shell model, which electrons play the most significant role in determining the properties of an atom? those in the outermost shell those in the innermost shell those in the shells between the innermost and outermost shells Electrons in every shell are just about equally important.

Select the correct answer Susan makes a simple pendulum by attaching a rock to a piece of string that is 24.6 centimeters long. Then she swings it back and forth. What is the period of her simple pendulum? A. 1.32 seconds B. 0.99 seconds C. 9.81 seconds D. 2.43 seconds

The temperature of a room is $23.3^{\circ }C$ What is this temperature expressed in Kelvin (K)?Enter the value but not the units. Type answer: $\square $

atomic nuclei. Use the mass and size of a nucleon to calculate nuclear density. And once you have nuclear density,use that to find what the weight (in pounds) of a human body would be if it was made entirely of atomic nuclei without all the extra space taken up by the electron clouds. The radius of a nucleon is $1.2\times 10^{-15}$ meters and the volume of an average human is about $0.07m^{3}$ In case you forgot, $1Newton=0.22lbs$ . Please show your full set up , steps, and work for credit.

What is the purpose of lightly applying the brakes with your left foot while moving through deep water? To test if your engine stalls To signal other drivers that you're in water To help generate heat and dry your brakes

Which of the following is not true about the far side of the moon? Has light known as the highlands Has many craters It never receives sun light No large dark spots (maria) Powder like surface

When the distance between two charges is halved, the electrical force between them halves. doubles. is reduced by $1/4$ quadruples. none of the above

A bow wave is produced when a speed boat moves as fast as the waves it produces. faster than the waves it produces. nearly as fast as the waves it produces. none of the above

What happens during the entire fusion process in the Sun?

Cold milk is poured into hot coffee. What happens to the heat energy of the coffee during the process? No heat energy moves between the two liquids. The coffee absorbs heat energy from the milk Ik (+Q coffee). $+Q$ The coffee releases heat energy into the milk (-Q coffee).

Liquids, solids, and gases exert pressure in the same direction. True False