The correct answer should be:
Pascals Principal Is The Answer.
7.11x 10⁶J
Explanation:
Given parameters:
Speed of light = 3 x 10⁸m/s
Mass of object = 23.7g = 0.0237kg
Unknown:
Energy = ?
Solution:
From Einstein's equation, we see that mass and energy are equivalent using the expression below:
E = mc²
Substituting the parameters:
E = 3 x 10⁸ x 0.0237 = 7.11x 10⁶J
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Answer:
Time taken by the coin to reach the ground is 1.69 s
Given:
Initial speed, v = 11.8 m/s
Height of the building, h = 34.0 m
Solution:
Now, from the third eqn of motion:
Now, time taken by the coin to reach the ground is given by eqn (1):
v' = v + gt
Answer:
v = 12.86 km/h
v = 3.6 m/s
Explanation:
Given,
The distance, d = 13.5 km
The time, t = 21/20 h
= 1.05 h
The velocity of a body is defined as the distance traveled by the time taken.
v = d / t
= 13.5 km / 1.05 h
= 12.86 km/h
The conversion of km/h to m/s
1 km/h = 0.28 m/s
12.86 km/h = 12.86 x 0.28 m/s
= 3.6 m/s
Hence, the velocity in m/s is, v = 3.6 m/s
Answer:
48m
Explanation:
First we need to calculate the distance from the person head to the top of the building using the equation of motion
v² = u²+2gH where
v is the final velocity of the balloon= 30.3m/s
u is the initial velocity of the balloon = 0m/s
g is the acceleration due to gravity = 9.81m/s²
H is the distance between the person head and the top of the building
Substituting into the formula, we have;
30.3² = 0²+2(9.81)H
918.09 = 19.62H
H = 918.09/19.62
H = 46.79m
To know how tall the building is, we will add the height of the building above the ground and the distance between the man's head and the top of the building. This will give;
Ht = 46.79+1.5
Ht = 48.29m
Ht is approximately 48m
Therefore the building is 48m tall
