The atoms that make up a star can be determined by A. the color

B. the position of the star in its galaxy

C. the stars emission spectrum

D. The star corona

Why do solar eclipses move from west to east?

A 700700700-Newton rightward net force is being applied to a 101010-kg object. What is the magnitude of the rightward acceleration on the object (in / text{ m}//text{s}^2 m/s 2 space, m, slash, s, start superscript, 2, end superscript) ?

3. A spring loaded gun fires a bullet into a block of wood hanging from a frictionless pendulum. a. How fast was the bullet going when it left the gun? Spring: k = 5,000 N/m Bullet: m=20.0g Block of wood: m = 1.00kg b.

Suppose that a charged particle of diameter 1.00 micrometer moves with constant speed in an electric field of magnitude 1.00*105 newtons per coulomb while acted upon by a drag force of 7.25*10-11 newtons.

What is the speed of a wave yhat has a frequency of 2.0Hz

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?