The speed of the star is 255 km/s
Explanation:
The kinetic energy of a body is the energy possessed by the body due to its motion. Mathematically:
where
m is the mass of the object
v is its speed
For the star in this problem, we have:
is the mass
is the kinetic energy
Therefore, the speed of the star is:
Which corresponds to 255 km/s
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A ray at which angle would produce the most glare is at 70 degrees. The
answer is letter D. the greater the incident of light is, the greater is its
index of refraction and thus having greater angle to produce a light ray.
Wear a seat belt of course.
Answer:
Mitochondria and plastids are the two organelles that contain their own genetic material. Both these organelles have their own DNA and ribosomes.
Strength of the magnetic field: 20 T
Explanation:
For a conductive wire moving perpendicular to a magnetic field, the electromotive force (voltage) induced in the wire due to electromagnetic induction is given by
where
B is the strength of the magnetic field
v is the speed of the wire
L is the length of the wire
For the wire in this problem, we have:
(induced emf)
L = 0.20 m (length of the wire)
v = 3.0 m/s (speed)
Solving for B, we find the strength of the magnetic field:
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