PHYSICS HIGH SCHOOL

If an astronaut weighs 750 N on the ground, what will he weigh in earth orbit 400 km above the earth’s surface? R_earth = 6.38 × 10^6 m,
m_earth=5.97×10^24 kg
G=6.674×10^−11 Nm^2/kg^2

Answers

Answer 1

Answer:

Answer:

The weight of the astronaut in Earth's orbit 400 km above the Earth's surface is 664.115 N

Explanation:

The given parameters are;

The weight of the astronaut on the ground = 750 N

The height of the orbit above the Earths surface = 400 km

The radius of the Earth = 6.38 × 10⁶ m

The mass of the Earth = 5.97 × 10²⁴ kg

The universal gravitational constant G = 6.674 × 10⁻¹¹ Nm²/kg²

From Newton's law of universal gravitation, we have;

$Weight \ on \ ground \ of \ astronaut \ F_W =G* (M_(Earth) * m_(astronouat))/(R_(Earth)^(2)) = 750 \ N$

$F_W =6.674 * 10^(-11)* (5.97 * 10^(24)* m_(astronouat))/((6.38 * 10^6)^(2)) = 750 \ N$

$m_(astronaut)$ = ((6.38 × 10⁶)² × 750)/((6.674 × 10⁻¹¹) × (5.97 × 10²⁴)) ≈ 76.62 kg

The mass of the astronaut ≈ 76.62 kg

For the weight of the astronaut in Earth orbit 400 km (400 × 10³ m) above the Earth's surface, we have;

$F_(W \ in \ orbit) =6.674 * 10^(-11)* (5.97 * 10^(24)* 76.62)/((6.38 * 10^6 + 400 * 10^3)^(2) ) = 664.115 \ N$

The weight of the astronaut in Earth's orbit 400 km above the Earth's surface = 664.115 N.

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Answers

Answer:

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Answers

Answer:

True

Explanation:

So, if your mass on Earth is 45 kg on Earth, your mass will also be 45 kg on the moon. The reason behind this is because the amount of matter you're made of doesn't change if you're on the moon or on the Earth. The weight of an astronaut and his space suit on the Moon is only 250 N.

Final answer:

False. The weight of an astronaut plus her space suit on the moon is not only 255 N. The weight of an object on the moon is about one-sixth of its weight on Earth.

Explanation:

False. The weight of an astronaut plus her space suit on the moon is not only 255 N. The weight of an object is determined by the force of gravity acting on it. The moon's gravity is about one-sixth that of Earth's, so the weight of an object on the moon is about one-sixth of its weight on Earth. If the weight of an astronaut plus her space suit on Earth is known to be 255 N, then her weight on the moon would be approximately 42.5 N.

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Three balls leave the edge of a table at the same time. Ball A rolls off the table with an initial horizontal velocity. Ball B is launched at an angle and has both an initial horizontal and vertical velocity. Ball C is dropped from rest, and has no initial velocity.a) Explain which one(s) hit the ground first.

b) Explain which one(s) hit the ground last

Answers

Explanation:

Balls A and C have the same initial vertical velocity of zero. Therefore, they land at the same time.

Ball B has a positive initial vertical velocity, so it hits the ground last.

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Answers

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When two or more amino acids come together, they undergo a condensation reaction, also known as a dehydration synthesis reaction. During this process, the amino group of one amino acid reacts with the carboxyl group of another amino acid, resulting in the formation of a peptide bond.

As more amino acids are added to the chain, it continues to grow, and the resulting molecule is known as a polypeptide.

Proteins are large, complex molecules that play crucial roles in various biological processes.

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