Answer:
Explanation:
To calculate the red shift you use the following formula:
\tetha: angle between the observer and the motion of the body
v: speed of the body
c: speed of light
for motion with angle 90° (transversal motion):
- A red dwarf moving away from Earth at 39.1 km/s :
- A yellow dwarf moving transversely at 15.1 km/s (angle = 90°):
- A red giant moving towards Earth at 23.3 km/s (angle = 0°):
- A blue dwarf moving away from Earth at 25.9 km/s
- A red dwarf moving transversely at 14.1 km/s
Answer:
B. mechanical to electrical
Answer:
the answer will be about 126 rad/s
Explanation:
Answer:
0.38 kN
Explanation:
From newton's second law of motion,
F = m(v-u)/t........................ Equation 1
Where F = Average force exerted on the ball, m = mass of the ball, v = final velocity of the ball, u = initial velocity of the ball, t = time of contact.
Given: m = 55 g = 55/1000 = 0.055 kg, v = 102 ft/s = (102×0.3048) m/s = 31.0896 m/s, u = 0 m/s (initially at rest), t = 0.0045 s
Substitute into equation 1
F = 0.055(31.0896-0)/0.0045
F = 1.709928/0.0045
F = 379.984 N
F ≈ 0.38 kN
Explanation:
The law of repulsion is given by Coulomb. The mathematical form of Coulomb law is given by :
...............(1)
Where
F is the force
k is the electrostatic constant
are electric charges
r is the distance between charges
The Newton's law of universal gravitation is given by :
..............(2)
G is the universal gravitational constant
From equation (1) and (2) it is clear that both law obeys inverse square law and both are of same type. So, the law of repulsion by Coulomb agrees with the Newton's law of universal gravitation.
