Compared to other fundamental forces in the universe, the gravitational force is A. very weak. B. stronger than some forces, but weaker than others. C. None of the above. D. very strong.

5. Each of these objects has a total mass M. Write an expression for the mass of each of thefollowing:a. An increment of length dx of a uniform bar of length L.b. A ring of radius r and thickness dr in a uniform disk of radius R.c. A spherical shell of radius r and thickness dr in a uniform sphere of radius R.

2. A 1000kg satellite travels with an orbital speed of 500 m/s around a planet at an orbital radius of 8000 km . What is the mass of the planet?

The escape velocity at the event horizon of a black hole is 3×108 m/s, i.e., the velocity of light. What is the mass of the black hole if the distance from its centre to the event horizon is 18km? a) 12.15 x 10-30 kg b) 12.15 x 1030 kg c) Infinity d) Cannot be determined

Time left 0:37:58 of on The force of gravitational attraction between two objects with masses m1 and m2, at a distance r apart, is given by Gm, m2 F = 12 of The dimensions of G (the universal constant of gravitation) is O a. M1L2T 3 O b. M1L3T2 O c. M'L3T2 O d. ML3T2

1. You and a friend set up an umbrella and chairs at Torrey Pines State Beach. Your friend goes boogie boarding while you read a book. Half an hour later you are surprised to see that your friend has moved south, parallel to the beach. They are still boogie boarding the same distance from shore, in the surf zone. Why did your friend drift parallel to the beach? 2. The Sun is much more massive than the Moon, but the Moon has a bigger influence on Earth's tides than the Sun. Why is this? 3.  Even when there is no wind at the beach, we still see waves. What is the source of these waves? Do not include tides, mass movement, or earthquakes in your answer. 4. What causes ocean surface water to sink to the bottom and become deep water? Where does this happen?  5. How do you escape a Rip Current?

3. Calculate the force of gravity on a 70 kg person at the surface of the earth and at a distance of four times the Earth's radius. The distance between the person and the earth is always measured from the center of the Earth. (Use G, Mg and Refrom the question #1)

Thruth or false 1. The gravitational field is a vector quantity. 2. You spin around your head a small mass on a rope. If you increase the radius while maintaining the same pull force on the string, you will see the frequency of the mass decrease. 3. All masses (even a person!) generate their own gravitational fields. 4. There is a point between two masses where the gravitational field is zero. 5. A mass requires a gravitational field only in space. 6. Two astronauts initially at rest in space will be accelerated towards each other since there is a gravitational force between the two.

Please answer the question and subquestions entirely. This is one single question. According to the official guideline, I can ask two subquestions! Thank you!   1) Two point masses are placed 10.0 cm apart and attract each other with a force of 10.0 N. Find the force of gravitational attraction between the masses when they are placed 5.00 cm apart.     3.00 N     4.50 N     20.0 N     40.0 N a) The radius of the orbit of a certain asteroid is four astronomical units. What is the period (in years) of this asteroid?     2 years     4 years     6 years     8 years b) A satellite is orbiting the earth at an altitude where the acceleration due to gravity is 8.70 m/s 2. What is its speed?     2.65 x 103 m/s     7.45 x 103 m/s     7.68 x 103 m/s     7.91 x 103 m/s

Two planets orbit a star. You can ignore the gravitational interactions between the planets. Planet 1 has orbital radius r₁, and planet 2 has r₂ = 4r₁ Planet 1 orbits with period T₁ Planet 2 orbits with period A. T₂ = -1/T₁ B. T₂=2T₁ C. T₂ = 4T₁ D. T₂=8T₁