Consider eight, eight-cubic centimeter (8 cm3) sugar cubes stacked so that they form a single 2 x 2 x 2 cube. How does the surface area of the single, large cube compare to the total surface area of the individual eight cubes? Report your answer as a ratio. Be sure to show all calculations leading to an answer?
When a steadily-flowing gas flows from a larger-diameter pipe to a smaller-diameter pipe, what causes the pressure in the smaller pipe to drop? Use 3 ? 4 complete sentences to explain your answer?
In a lab experiment, 45 grams of a metal are heated from 22?C to 78?C by the addition of 450 J of heat. What is the specific heat of the metal? Show all calculations leading to an answer?
Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see? Explain using 3 ? 4 complete sentences.?
Two electrically-charges spheres are suspended from insulated threads a certain distance from each other. There is a certain amount of electrostatic force between them. Describe specifically (not just increase or decrease) what happens to this force in each of the scenarios below (1 pt. ea.):
The charge on one sphere is reduced by half
The charge on both spheres is doubled
The distance between the spheres is increased by a factor of three
The isotope, Carbon-14 emits beta radiation and has a half live of 5730 years. How long will it take for the amount of radiation this gives off to drop by a factor of 4?
The total U.S. consumption of electricity in a particular year was 5.0 x 1012 kilowatt-hours. What is the mass equivalence of this amount of energy? Show all calculations leading to an answer.
When uranium-238 emits an alpha particle, what isotope is created? Show the nuclear equation for this reaction.

Consider eight, eight-cubic centimeter (8 cm3) sugar cubes stacked so that they form a single 2 x 2 x 2 cube. How does the surface area of the single, large cube compare to the total surface area of the individual eight cubes? Report your answer as a ratio. Be sure to show all calculations leading to an answer?
When a steadily-flowing gas flows from a larger-diameter pipe to a smaller-diameter pipe, what causes the pressure in the smaller pipe to drop? Use 3 ? 4 complete sentences to explain your answer?
In a lab experiment, 45 grams of a metal are heated from 22?C to 78?C by the addition of 450 J of heat. What is the specific heat of the metal? Show all calculations leading to an answer?
Suppose the thickness of an oil film on water is just the right thickness for canceling red light. What color will your eye see? Explain using 3 ? 4 complete sentences.?
Two electrically-charges spheres are suspended from insulated threads a certain distance from each other. There is a certain amount of electrostatic force between them. Describe specifically (not just increase or decrease) what happens to this force in each of the scenarios below (1 pt. ea.):
The charge on one sphere is reduced by half
The charge on both spheres is doubled
The distance between the spheres is increased by a factor of three
The isotope, Carbon-14 emits beta radiation and has a half live of 5730 years. How long will it take for the amount of radiation this gives off to drop by a factor of 4?
The total U.S. consumption of electricity in a particular year was 5.0 x 1012 kilowatt-hours. What is the mass equivalence of this amount of energy? Show all calculations leading to an answer.
When uranium-238 emits an alpha particle, what isotope is created? Show the nuclear equation for this reaction.

PHYSICS QUESTIONS
1. A certain freely falling object requires 1.10 s to travel the last 40.0 m before it hits the ground. From what height above the ground did it fall? ________m

2. A student throws a set of keys vertically upward to his fraternity brother, who is in a window 4.05 m above. The brother’s outstreched hand catches the keys
1.35 s later.
(a) With what initial velocity were the keys thrown? ______ m/s

(b) What was the velocity of the keys just before they were caught? (Take upward as the positive direction.) __________ m/s
3. A small mailbag is released from a helicopter that is descending steadily at 2.50 m/s.

(a) After 2.00 s, what is the speed of the mailbag?

___ m/s

(b) How far is it below the helicopter?
____ m

( c ) What are your answers to parts (a) and (b) if the helicopter is rising steadily at 2.50 m/s?
_____ m/s
_____ m

4. A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.5 m/s2. The driver then applies the brakes, causing a uniform acceleration of –
2.0 m/s2. If the brakes are applied for 1.0 s, determine each of the following.

(a) How fast is the car going at the end of the braking period?
_____m/s
(b) How far has it gone?
_____m
5. Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than 800 m/s2 lasting for
any length of time will not cause injury, whereas an acceleration greater than 1000 m/s2 lasting for at least 1 ms will cause injury. Suppose a small child rolls off a
bed that is 0.41 m above the floor. If the floor is hardwood, the child’s head is brought to rest in approximately 2.1 mm. If the floor is carpeted, this stopping
distance is increased to about 1.0 cm. Calculate the magnitude and duration of the deceleration in both cases, to determine the risk of injury. Assume that the child
remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or less than the speed you calculate.

Hardwood floor magnitude ___ m/s2 Duration _____ ms
Carpeted floor magnitude___ m/s2 Duration _____ ms