A small mailbag is released from a helicopter that is descending steadily at 2.42m/s. (a) After 5.00 s, what is the speed of the mailbag?

A small mailbag is released from a helicopter that is descending steadily at 2.42m/s.
(a) After 5.00 s, what is the speed of the mailbag?
v = 1-61.1Incorrect: Your answer is incorrect.
The response you submitted has the wrong sign.[removed][removed] m/s
(b) How far is it below the helicopter?
d = 2[removed]Incorrect: Your answer is incorrect.
The response you submitted has the wrong sign.[removed][removed] m
(c) What are your answers to parts (a) and (b) if the helicopter is rising steadily at 2.42m/s?
v = 3[removed]Incorrect: Your answer is incorrect.
The correct answer is not zero.[removed][removed] m/s
d = 4[removed]Incorrect: Your answer is incorrect.
The correct answer is not zero.[removed][removed] m

Compare the momentum of a 5450 kg truck moving at 8.00 m/s to the momentum of a 2725 kg car moving at 16.0 m/s.

Compare the momentum of a 5450 kg truck moving at 8.00 m/s to the momentum of a 2725 kg car moving at 16.0 m/s.
Convert normal blood pressure readings of 120 over 80 mm Hg to newtons per meter squared using the relationship for pressure due to the weight of a fluid (P = hρg) rather than a conversion factor
although ben franklin had only one year of schooling, he became a highly educated person. describe how franklin learned about the world.

1) A large storage tank holds 2900 m3 of a liquid mixture that has 112% of the density of water. The tank is in an empty warehouse with 40,000 ft2 of empty floor space. If over a weekend the tank leaks and empties on to the floor: a) How deep is the liquid on Monday morning?

1) A large storage tank holds 2900 m3 of a liquid mixture that has 112% of the density of water. The tank is in an empty warehouse with 40,000 ft2 of empty floor space. If over a weekend the tank leaks and empties on to the floor: a) How deep is the liquid on Monday morning? b) The liquid gets pumped out and carried away by trucks that can carry 9000 kg of liquid each. How many truck loads are required? 2) The large sheet of ice diagrammed below has uniform thickness h=28.5 m and a mass of 2.25 x 108 kg. Its identical upper and lower surfaces each have area A and are flat with irregular outlines. a) Determine the area A. (Look up the density of ice.) b) If the same ice sheet were in the shape of a cube, what would be the length of each side of the cube?
3) The Earth is approximately spherical in shape with a radius of 6.4 x 106 m. Approximately 70% of the surface area of Earth is ocean and the average depth of Earth’s oceans is 1 mile (order of magnitude). a) Use the above information to determine the total volume of seawater on the Earth1 in cubic meters. Determine the mass of seawater on Earth based on your volume calculation. b) Determine the volume of the Earth. What fraction of the Earth is seawater, by volume? What fraction of the Earth is seawater, by mass? Why do these fractions differ? c) Recall the activity we performed in class using eyedroppers. Use a round number estimate of the number of drops per milliliter to estimate the number of drops of water in the oceans. 1 The volume of a spherical shell of thickness h covering the surface of a sphere of radius R is given approximately by

4πR2h . The approximation is very accurate as long as

h << R . PHY 2201 page 2 4) Imagine a cylindrically shaped object with diameter D and height (length) h. a) � h D = 0.7 for the given values. Someone makes a scale model of the object that is either larger or smaller than the actual cylinder. If the scale model is to look like the actual cylinder how must the quantities h and D be related for the scale model? Explain your reasoning2. b) Describe how h and D would have to be related if the cylinder changed size and the rescaled cylinder was distorted so that it was narrower and stretched vertically compared to the original? Repeat for a rescaled cylinder that was distorted so that it was wider and squished vertically. Explain your reasoning in each case. Don’t make up values for D and h. There are an infinite number of possibilities in each case, but these questions have definite answers. c) Sketch on the same set of axes (no need for graph paper) three linear functions: one describing how h is related to D for rescaled cylinders that are not distorted, a second describing the stretched vertically cylinders, and a third describing the squished cylinders. Describe the slope and intercept of each line. 2 Hint: If someone took a picture of the cylinder, the cylinder in the picture could be larger or smaller than the actual object. How would h and D have to related so there was no distortion?

1) A large storage tank holds 2900 m3 of a liquid mixture that has 112% of the density of water. The tank is in an empty warehouse with 40,000 ft2 of empty floor space. If over a weekend the tank leaks and empties on to the floor: a) How deep is the liquid on Monday morning?

1) A large storage tank holds 2900 m3 of a liquid mixture that has 112% of the density of water. The tank is in an empty warehouse with 40,000 ft2 of empty floor space. If over a weekend the tank leaks and empties on to the floor: a) How deep is the liquid on Monday morning? b) The liquid gets pumped out and carried away by trucks that can carry 9000 kg of liquid each. How many truck loads are required? 2) The large sheet of ice diagrammed below has uniform thickness h=28.5 m and a mass of 2.25 x 108 kg. Its identical upper and lower surfaces each have area A and are flat with irregular outlines. a) Determine the area A. (Look up the density of ice.) b) If the same ice sheet were in the shape of a cube, what would be the length of each side of the cube?
3) The Earth is approximately spherical in shape with a radius of 6.4 x 106 m. Approximately 70% of the surface area of Earth is ocean and the average depth of Earth’s oceans is 1 mile (order of magnitude). a) Use the above information to determine the total volume of seawater on the Earth1 in cubic meters. Determine the mass of seawater on Earth based on your volume calculation. b) Determine the volume of the Earth. What fraction of the Earth is seawater, by volume? What fraction of the Earth is seawater, by mass? Why do these fractions differ? c) Recall the activity we performed in class using eyedroppers. Use a round number estimate of the number of drops per milliliter to estimate the number of drops of water in the oceans. 1 The volume of a spherical shell of thickness h covering the surface of a sphere of radius R is given approximately by

4πR2h . The approximation is very accurate as long as

h << R . PHY 2201 page 2 4) Imagine a cylindrically shaped object with diameter D and height (length) h. a) � h D = 0.7 for the given values. Someone makes a scale model of the object that is either larger or smaller than the actual cylinder. If the scale model is to look like the actual cylinder how must the quantities h and D be related for the scale model? Explain your reasoning2. b) Describe how h and D would have to be related if the cylinder changed size and the rescaled cylinder was distorted so that it was narrower and stretched vertically compared to the original? Repeat for a rescaled cylinder that was distorted so that it was wider and squished vertically. Explain your reasoning in each case. Don’t make up values for D and h. There are an infinite number of possibilities in each case, but these questions have definite answers. c) Sketch on the same set of axes (no need for graph paper) three linear functions: one describing how h is related to D for rescaled cylinders that are not distorted, a second describing the stretched vertically cylinders, and a third describing the squished cylinders. Describe the slope and intercept of each line. 2 Hint: If someone took a picture of the cylinder, the cylinder in the picture could be larger or smaller than the actual object. How would h and D have to related so there was no distortion?

1) A large storage tank holds 2900 m3 of a liquid mixture that has 112% of the density of water. The tank is in an empty warehouse with 40,000 ft2 of empty floor space. If over a weekend the tank leaks and empties on to the floor: a) How deep is the liquid on Monday morning?

1) A large storage tank holds 2900 m3 of a liquid mixture that has 112% of the density of water. The tank is in an empty warehouse with 40,000 ft2 of empty floor space. If over a weekend the tank leaks and empties on to the floor: a) How deep is the liquid on Monday morning? b) The liquid gets pumped out and carried away by trucks that can carry 9000 kg of liquid each. How many truck loads are required? 2) The large sheet of ice diagrammed below has uniform thickness h=28.5 m and a mass of 2.25 x 108 kg. Its identical upper and lower surfaces each have area A and are flat with irregular outlines. a) Determine the area A. (Look up the density of ice.) b) If the same ice sheet were in the shape of a cube, what would be the length of each side of the cube?
3) The Earth is approximately spherical in shape with a radius of 6.4 x 106 m. Approximately 70% of the surface area of Earth is ocean and the average depth of Earth’s oceans is 1 mile (order of magnitude). a) Use the above information to determine the total volume of seawater on the Earth1 in cubic meters. Determine the mass of seawater on Earth based on your volume calculation. b) Determine the volume of the Earth. What fraction of the Earth is seawater, by volume? What fraction of the Earth is seawater, by mass? Why do these fractions differ? c) Recall the activity we performed in class using eyedroppers. Use a round number estimate of the number of drops per milliliter to estimate the number of drops of water in the oceans. 1 The volume of a spherical shell of thickness h covering the surface of a sphere of radius R is given approximately by

4πR2h . The approximation is very accurate as long as

h << R .
PHY 2201 page 2
4) Imagine a cylindrically shaped object with diameter D and height (length) h.
a)

h D
= 0.7 for the given values. Someone makes a scale model of the object that is either larger
or smaller than the actual cylinder. If the scale model is to look like the actual cylinder how must the quantities h and D be related for the scale model? Explain your reasoning2. b) Describe how h and D would have to be related if the cylinder changed size and the rescaled cylinder was distorted so that it was narrower and stretched vertically compared to the original? Repeat for a rescaled cylinder that was distorted so that it was wider and squished vertically. Explain your reasoning in each case. Don’t make up values for D and h. There are an infinite number of possibilities in each case, but these questions have definite answers. c) Sketch on the same set of axes (no need for graph paper) three linear functions: one describing how h is related to D for rescaled cylinders that are not distorted, a second describing the stretched vertically cylinders, and a third describing the squished cylinders. Describe the slope and intercept of each line.
2 Hint: If someone took a picture of the cylinder, the cylinder in the picture could be larger or smaller than the actual object. How would h and D have to related so there was no distortion?

The steps for the scientific method are listed in Chapter 1. List and explain each of the steps in the scientific method in the context of the following situation.

1. The steps for the scientific method are listed in Chapter 1. List and explain each of the steps in the scientific method in the context of the following situation. You do not have to resolve the question; just explain the steps for resolving the question:
It is well known that objects expand when heated. An iron plate will get slightly larger when put in a hot oven. Suppose an iron plate has a hole cut in the center. Will the hole get larger or smaller when the plate is heated and expansion occurs?
2. Answer the following questions:
a. Compare Aristotle’s concept of inertia with the ideas of Galileo and Newton. In making your comparison, state the concept as each interpreted it (in your own words) and give the similarities and differences.
b. If a baseball rolls across the ground and comes to a stop, how would Aristotle, Galileo, and Newton interpret the behavior of the ball?
3. Answer the following questions:
a. Explain mechanical equilibrium.
b. If a book rests motionless on a table, what forces are acting on it?
c. What is the net force on the book?
d. How would the magnitude of the forces change if a second book of equal weight was placed on top of the first book?
4. A 50 kilogram student stands in an elevator. How much force does she exert on the elevator floor if
a. The elevator is stationary?
b. The elevator accelerates upward at 1 meter per second squared (m/s2)?
5. Distinguish between speed, velocity, and acceleration. Explain the quantities in terms of “freely falling” objects.
6. Answer the following questions:
a. How long would it take for an object dropped from the Leaning Tower of Pisa (height 54.6 meters) to hit the ground?
b. How fast was the object traveling at the moment of impact?
7. Construct a table of values of velocity and total distance fallen at the end of each half-second during the first 5 seconds for a stone at rest dropped from a very tall building. Include columns for time, velocity, and total distance.
8. A parachute dropped from a 30 meter-high cliff falls with a constant velocity of 1.5 meters per second. Twenty-two seconds later a stone is dropped from the cliff.
a. How long does it take for the parachute to hit the ground?
b. How long does it take for the stone to hit the ground?
c. Which one will hit the ground first and why?
9. Galileo used inclined planes to investigate “free fall.” Why did he do that instead of experimenting with velocity by dropping objects?