Cientists make observations of an unknown object in space. The table shows their data. Question Observation
What is the diameter of the object? 465 kilometers
What is the distance of the object from the Sun? 2.36 astronomical units (AU)
What is the surface temperature of the object? −73°C
What are the visible surface features of the object? numerous craters
What is the composition of the object? primarily silicate rocks and metals

What object are the scientists observing, and what can they infer from their observations?
A.
The object is a comet. It can be inferred that it is rapidly spinning due to the large diameter of the object.

B.
The object is a comet. It can be inferred that it is mostly black due to chemical compounds frozen on the surface.

C.
The object is an asteroid. It can be inferred that it is volcanically active due to the presence of craters on the object's surface.

D.
The object is an asteroid. It can be inferred that it is a light gray color due to the presence of silicate rocks in the comp

What is a good example of instantaneous speed

An charge with mass m and charge q is emitted from the origin, (x, y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

Astone is thrown with a speed v0 and returns to earth, as the drawing shows. ignore friction and air resistance, and consider the initial and final locations of the stone. which one of the following correctly describes the change δpe in the gravitational potential energy and the change δke in the kinetic energy of the stone as it moves from its initial to its final location? options a.δpe = 0 j and δke = 0 j b.δpe is positive and δke is negative c.δpe = 0 j and δke is positive d.δpe is negative and δke is positive e.δpe = 0 j and δke is negative