The figure above shows the position of a moon that orbits a planet in an elliptical path. Two specific locations of the moon, position and position , are labeled.

1. As the moon orbits the planet from position to position , is the magnitude of the planet’s force due to
gravity exerted on the moon constant? Why or why not?
A
Yes, because the masses of the planet and moon remain constant.

B
Yes, because the elliptical path that the moon travels around the planet is the same for all revolutions.

C
No, because the tangential speed of the moon is always changing.

D
No, because the moon’s distance from the planet is always changing.

True or false: the revolution of the earth creates day and night as it rotates around the sun

We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.

Suppose that three astronomical objects, 1, 2, and 3 are observed to lie on a line, and the distance from object 1 to object 3 is d. object 1 has four times the mass of object 3, and seven times the mass of object 2. find the distance between objects 1 and 2 for which the net force on object 2 is zero.