Question 1 (2 points)
What is gravitation?
Question 1 options:
the tendency of o...
Physics, 20.11.2021 08:50 sabrinamarie17
Question 1 (2 points)
What is gravitation?
Question 1 options:
the tendency of objects to move downward
the attraction of any two objects because of their mass
the attraction or repulsion of objects because of their electric charge
the effect of air pressure in pushing objects to the ground
Question 2 (2 points)
Which of these was discovered by Newton?
Question 2 options:
The acceleration caused by gravity is�9.8�m/s/s.
Gravity keeps the planets in their orbits.
The planets move in elliptical orbits around the sun.
The earth orbits the sun, rather than the reverse.
Question 3 (2 points)
How was the gravitational constant�G�first determined?
Question 3 options:
by measuring the force of gravity between two planets
by observing the moon's orbit
by measuring the force of gravity between two objects on the earth
by knowing that the acceleration caused by gravity is�9.8�m/s/s
Question 4 (2 points)
The force of gravity between any two ordinary objects on the earth is .
Question 4 options:
always downward
stronger when closer to the earth
stronger if the objects are more massive
stronger than the force of gravity from the earth
Question 5 (2 points)
Which of these statements is true about the International Space Station in orbit around the earth?
Question 5 options:
The space station exerts a force on the earth toward the space station.
The earth's gravity acts on the space station, but not the reverse.
There is no gravity acting at the height of the space station.
The force of gravity produces the same acceleration for the earth and the space station.
Question 6 (2 points)
Suppose a planet has twice the mass of the Earth and twice the earth's radius. What is the acceleration of an object in free fall on this planet?
Question 6 options:
twice as much as on Earth.
four times as much on Earth.
one half as much as Earth.
one fourth as much as Earth.
Question 7 (2 points)
Which of these does Newton's law of universal gravitation imply?
Question 7 options:
Force is mass times acceleration squared.
There is no gravity inside a space station in orbit.
The earth attracts the moon more strongly than the moon attracts the earth.
The force of the earth's gravity on an object at sea level is stronger than at the top of a mountain.
Question 8 (2 points)
What is a gravitational field?
Question 8 options:
a region of space-time with constant gravity
the region of space-time where the force is equal to�6.67�10?11�N
a region of space-time with a property at each point determined as the gravitational force on any object divided by its mass�m
the force of gravity between any two objects
Question 9 (2 points)
A gravitational field can be represented by
Question 9 options:
field vector arrows pointing in the direction of the gravitational force.
field vector arrows pointing in the direction of the electrical force.
a photo of a large, green field filled with heavy grass.
field vector arrows pointing in random directions based on their mass.
Question 10 (2 points)
What is the magnitude of a gravitational field at a location where an 80 kg astronaut weighs 25 percent what he would weigh on the earth?
Question 10 options:
10 N/kg
2.5 N/kg
20 N/kg
200 N/kg
Question 11 (2 points)
What causes gravitational force in Einstein's theory of general relativity?
Question 11 options:
the way an object with mass placed on a surface bends the surface
the way mass bends space and time
the existence of black holes
reference frames moving at a constant relative velocity
Question 12 (2 points)
A mass of 10.0 kg is in a gravitational field of�3.50�N/kg�. What force acts on the mass?
Question 12 options:
0.35 N
9.8 N
35.0 N
21.6 N
Answers: 3
Physics, 22.06.2019 01:30, markmeinberg
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
Answers: 3
Physics, 22.06.2019 06:00, quetzaliescalona
A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s
Answers: 1
Physics, 22.06.2019 11:00, MoogleCaliS
How do we measure or think of speed in the united states?
Answers: 1
Physics, 22.06.2019 16:30, CadenSkinner2003
Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.
Answers: 1
Mathematics, 26.07.2019 12:40
Mathematics, 26.07.2019 12:40
Physics, 26.07.2019 12:40
Physics, 26.07.2019 12:40