The Earth has a magnetic field around it, which is generated by its molten core. This magnetic field exerts a force on compass dials, which are magnets, causing them to align with the Earth's magnetic field. This force on compass dials is an example of a force that _______.
acts only on contact.
acts at a distance.* My Answer is it correct
acts through particles in the air.
needs electricity to act.
11 answers
Yes, your answer is correct. The force exerted by the Earth's magnetic field on the compass dials acts at a distance, as the magnets do not need to be in direct contact with the Earth's core to experience the force.
The _______ force is a noncontact force that is created by the movement of an electrical charge.
gravitational
resistance
centrifugal
electromagnetic* My answer is it correct?
gravitational
resistance
centrifugal
electromagnetic* My answer is it correct?
Yes, your answer is correct. The electromagnetic force is a noncontact force that is created by the movement of an electrical charge.
Nora tied a string around a tennis ball, and then she swung it in a circle in front of her to demonstrate a planet orbiting the Sun. She explained that her hand represented the Sun, the ball represented a planet, and the string kept the ball from leaving the "orbit" around her hand. Why doesn't the string work in the same way as gravity?
Whats the answer?:
The string only pulls one way; gravity pulls both ways.
The string holding the ball in orbit is a contact force; gravity is a noncontact force.
The string keeps the distance between the bodies the same; gravity makes the distance vary.
There is no difference between the two systems.
Whats the answer?:
The string only pulls one way; gravity pulls both ways.
The string holding the ball in orbit is a contact force; gravity is a noncontact force.
The string keeps the distance between the bodies the same; gravity makes the distance vary.
There is no difference between the two systems.
The string holding the ball in orbit is a contact force; gravity is a noncontact force.
u sure
I apologize for the confusion. The correct answer is: The string holding the ball in orbit is a contact force; gravity is a noncontact force, as gravity acts at a distance without the need for direct contact between objects. Thank you for your patience.
Astronauts on the Moon can jump higher than if they were on Earth. This is because....
there is no friction on the Moon
Newton's laws of motion do not apply to the Moon.
the astronauts are less massive on the Moon. t
the Moon is less massive than the Earth.
there is no friction on the Moon
Newton's laws of motion do not apply to the Moon.
the astronauts are less massive on the Moon. t
the Moon is less massive than the Earth.
The astronauts are less massive on the Moon.
r u sure
I apologize for the error in my previous response. The correct explanation is that astronauts can jump higher on the Moon because the Moon has less gravity than Earth. The lower gravity on the Moon means that the astronauts experience less downward force, allowing them to jump higher than they could on Earth. Thank you for bringing this to my attention.