Text, images, and links that establish the website's value are used to answer a website visitor's ______ question.
A. Who?
B. What?
C. Why?
D. Where?
Answer: C
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A 0.140-kg baseball is dropped from rest. It has a speed of 1.20 m/s just before it hits the ground, and it rebounds with an upward speed of 1.00 m/s. The ball is in contact with the ground for 0.0140 s
What is the average force exerted by the ground on the ball during the time of contact? A) 2.00 N upwards B) 2.00 N downwards C) 22.0 N upwards D) 22.0 N downwards E) 0.00 N
Sometime within the next million years or so, their planet is likely to be doomed because
A) jets of material shot out of the accretion disk will shoot down their planet. B) their planet receives most of its energy from the red giant. However, this star will soon be completely devoured in the accretion disk and thus will no longer exist. C) the red giant will probably undergo a supernova explosion within the next million years. D) tidal forces from the black hole will rip the planet apart. E) the planet's orbit gradually will decay as it is sucked in by the black hole.
Select the characterisitics that apply to both Jovian and terrestrial planets.
Select all that apply.
- Are spherical
- Earth-like
- Gas giant
- Had/has a hot interior
- Has an atmosphere
- Large
- Many moons
- May have rings
- Orbits around sun
- Rocky surface
- Small
- Strong gravitational field
Where is the Sun located relative to a planet's orbit about it?
a. at the center of the orbit, which is a circle b. at the center of the orbit, which is an ellipse c. at one focus of the ellipse which forms the orbit d. none of the above