can someone please show me how to do number 12 and 13 on the opted test? Thanks!
physic
- Thread starter winterhot
- Start date
- Joined
- Jun 20, 2008
- Messages
- 225
- Reaction score
- 1
post the question
12. a satellite of mass 200kg completes a circular orbit of the Earth in 120 minutes. a 400 kg satellite is then put into orbit at the same height above the Earth. which of the following represents the time, in minutes, for the 400kg satellite to complete a circular orbit
a. 60
b. 120
c. 180
d. 240
e. 360
13. atmospheric pressure is very nearly 100kPa. A sealed container of air at 1 atmospheric pressure has a door 1 m wide and 2 m high. This door is very hard to open during HIGH pressure days. If the atmospheric pressure on the outside of the container is just 1 percent greater than on the inside, then what added force in Newtons is required to open the container door?
a. 100
b. 200
c. 2.000
d. 10000
e. 20000
Thanks in advance.
a. 60
b. 120
c. 180
d. 240
e. 360
13. atmospheric pressure is very nearly 100kPa. A sealed container of air at 1 atmospheric pressure has a door 1 m wide and 2 m high. This door is very hard to open during HIGH pressure days. If the atmospheric pressure on the outside of the container is just 1 percent greater than on the inside, then what added force in Newtons is required to open the container door?
a. 100
b. 200
c. 2.000
d. 10000
e. 20000
Thanks in advance.
- Joined
- Apr 6, 2008
- Messages
- 837
- Reaction score
- 6
i can answer the first one (i hope, correct me anyone if im wrong)
12. Pretty sure that the Masses of both objects are irrelevant in this problem given that they both orbit earth at the same "height." In this case, it doesnt matter if object 1 is a pencil and object 2 is a truck, they will take the same amount of time to orbit the earth given that the height is the same.
So therefore i think the answer is B) 120.
Also im pretty sure that this problem would only involve further calculation if the radius of there centers were different, meaning if they were at different heights or they have a specific velocities. Then i suppose you would have to use one of the formulas for universal gravitation.
12. Pretty sure that the Masses of both objects are irrelevant in this problem given that they both orbit earth at the same "height." In this case, it doesnt matter if object 1 is a pencil and object 2 is a truck, they will take the same amount of time to orbit the earth given that the height is the same.
So therefore i think the answer is B) 120.
Also im pretty sure that this problem would only involve further calculation if the radius of there centers were different, meaning if they were at different heights or they have a specific velocities. Then i suppose you would have to use one of the formulas for universal gravitation.
Similar threads
