Answer:
The change in momentum, p = -4.539 kg-m/s
Explanation:
It is given that,
Mass of the ball, m = 0.89 kg
Initial speed of the ball, u = 3.8 m/s
Final speed of the ball, v = -1.3 m/s (as it rebounds)
Let p is the change in linear momentum of the ball. We know that the linear momentum is equal to the product of mass and velocity. It is given by :
p = -4.539 kg-m/s
So, the change in linear momentum of the ball is 4.539 kg-m/s. Hence, this is the required solution.
Answer:
the box will be pushed to the left with a force equals 40 N
Explanation:
F1 = 15 N
F2 = 25 N
F = 25 + 15 = 40 N
Answer:
Explanation:
For time period of revolution , the expression is as follows .
T² = 4π² R³ /GM , M is mass of the earth.
Putting the values
T² = 4π² (7880 x 10³)³ /(6.67 x 10⁻¹¹ )( 5.97 x 10²⁴ )
T² = 4.846 x 10⁷ s
T = 6.961 x 10³ s
= 6961 s
= 116 minutes .
The atomic number is the number of protons is the atomic number. In a neutral atom this number is also the number of electrons. In the molybdenum example above all of these numbers are 42. Protons and neutrons each have a mass of one and electrons a mass of zero.
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