What is 34 + (3) × (1.2465) written with the correct number of significant figures?
2 answers:
Answer:
Explanation:
Here, we need to solve the given numbers with the correct number of significant figures.
The given problem is,
Firstly, it is required to multiply 3 and 1.2465, so that we get = 3.7395
Now, we will add 34 on the above value, so that we get = 37.7395
Significant figures are used to find the value to its measurement resolution. In correct order of significant figures, 37.7395 is equivalent to 38.
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Answer:
a) m = 69.0 kg
b) release some gas in the opposite direction to the astronaut's movement
Explanation:
a) Let's use Newton's second law
F = m a
m = F / a
m = 60.0 / 0.870
m = 69.0 kg
b) when we exert a force on the astronaut it acquires a momentum po, as the astronaut system plus spacecraft is isolated, the momentum is conserved
p₀ = p_f
m v = M v '
v ’=
so we see that the ship is moving backwards, but since the mass of the ship is much greater than the mass of the astronaut, the speed of the ship is very small.
One method to avoid this effect is to release some gas in the opposite direction to the astronaut's movement so that the initial momentum of the astronaut plus the gas is zero and therefore no movement is created in the spacecraft.