1 year ago

Astronomers have found water on mars.

1 answer:

4 0

The thin atmosphere of Mars is thought to be due to the planet's lack of a magnetic field, which has allowed the Solar wind to blow away much of the gas the planet once had. Venus, despite still having a thick atmosphere of CO2, surprisingly has a similar problem

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Two white rabbits produce a brown rabbit. How is this possible? Explain

kirill115 [55]

Answer:

If one of the parents is white and the other is brown, their offspring will be either white or brown with equal probabilities. Rabbits in this population mate randomly; thus, the probability of mating two white rabbits is the same as the probability of mating between two brown rabbits.

Explanation:

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2 years ago

According to boyle’s law, the volume of a gas is inversely proportional to its pressure if the?

Andru [333]

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3 years ago

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Do magnetic fields exist?

Art [367]

I believe yes they do hope this helps

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a model rocket is launched at an angle of 55 to the horizontal with a momentum of 20 kg-m/. If the vertical component of its vel

den301095 [7]

$Given:\\ \alpha =55^\circ\\p=20kg\cdot \frac{m}{s} \\v_v=40 \frac{m}{s} \\\\Find:\\m=?\\\\Solution:\\\\p_v=mv_v\Rightarrow m= \frac{p_v}{v_v} \\\\ \frac{p_v}{p} =\cos \alpha \Rightarrow p_v=p\cos \alpha \\\\m= \frac{p\cos \alpha }{v_v} \\\\m= \frac{20kg\cdot \frac{m}{s} \cdot \cos 55^\circ }{40 \frac{m}{s} } \approx 0.287kg=287g$

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3 years ago

A body of mass 70kg climbed a hill 1000m high. calculate the maximum energy gained by the body.

stellarik [79]

Potential energy = mgh

So, energy gained

= mgh

= 70kg × (9.8m/s²) × 1000m

= 686000 kgm²/s²

= 686000 J

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2 years ago