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ioda
3 years ago
6

1) Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is w

hisked away by a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of your answer through math
Physics
2 answers:
stiv31 [10]3 years ago
5 0
They will not look the same, the one on earth will look 60 while the one in space will only look about 26.16 the equation is sqrt[1-(0.9)^2] = 0.436 .

Hatshy [7]3 years ago
4 0
No they will not look the same.
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wlad13 [49]

Answer:

a) V = 0.82m/s

b) Vmax = 0.985 m/s

Explanation:

By conservation of energy we know that:

Eo = Ef    \frac{m*V^{2}}{2}-\frac{K*Xmax^{2}}{2}=-Ff*Xmax

Solving for V we get:

V = 0.82 m/s

To find the maximum speed we will do the same to an intermediate point where the compression is X and the distance for the work donde by frictions is given by (Xmax - X) = (0.28m - X):

\frac{m*Vmax^{2}}{2}+\frac{K*X^{2}}{2}-\frac{K*Xmax^{2}}{2}=-Ff*(Xmax-X)

Then we have to solve for V, derive and equal zero in order to find position X. After solving the derivative we get:

X = 0.1m    Replacing this value into the equation for Vmax:

Vmax = 0.985m/s

6 0
2 years ago
Which type of energy is water held back by a dam?
stepladder [879]

Answer:    hydroelectric dams

Explanation: Enormous energy is stored in water held back by hydroelectric dams. The energy is transformed into (a form of kinetic energy) as it falls across the dam. The falling water strikes the blades of a turbine and makes them spin, and the then turns the shaft of a generator.

8 0
3 years ago
Read 2 more answers
What property of matter is momentum related to
Rudik [331]

Momentum is related to mass. In fact, it's directly proportional to mass.

5 0
2 years ago
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A car travels 90 meters north in 15 seconds. Then turns around and travels at 40 meters south in 5.0 seconds. what is the averag
Viefleur [7K]

Average velocity  =  (displacement) / (total time)

Displacement = distance and direction between
                             the starting point and the end point

The car travels 90 meters north, then 40 meters south. 
So it ends up 50 meters north of where it began. 

Displacement = 50 meters north
Total time  =  (15 + 5) = 20 seconds

Average velocity = (50 meters north) / (20 seconds)

                             =  2.5 m/s north
4 0
2 years ago
When a 4.60-kg object is hung vertically on a certain light spring that obeys Hooke's law, the spring stretches 2.30 cm. (a) If
Alex787 [66]

Answer:

a) y = 0.0075 m

b) W = 1.569 J

Explanation:

See attachment for the solution

6 0
2 years ago
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