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anygoal [31]
4 years ago
11

An undiscovered planet, many light-years from Earth, has one moon, which has a nearly circular periodic orbit. If the distance f

rom the center of the moon to the surface of the planet is 2.165×105 km and the planet has a radius of 4175 km and a mass of 6.70×1022 kg , how long (in days) does it take the moon to make one revolution around the planet? The gravitational constant is 6.67×10−11N·m2/kg2 .

Physics
1 answer:
EleoNora [17]4 years ago
8 0

Answer:

364days

Explanation:

Pls see attached file

Explanation:

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You want to estimate the height of a cathedral ceiling. You note that a pendulum extending from the ceiling almost touches the f
barxatty [35]
<h2>The height of the room is 36 m </h2>

Explanation:

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here l is the length of pendulum and g is the acceleration of gravity

Thus l = \frac{T^2 g}{4\pi^2 }

and l = \frac{(12)^2 x 10}{4 x 9.8} = 36 m approx

4 0
4 years ago
Please answer formula is in text
Travka [436]

E=mc^2 n its given 1kg = 9x10^16J

so need to figure out the total mass loss n u can find the energy released

mass loss when 4x H atom combines to form 1x He atom in a fusion reaction is given as 4.59x10^-29kg

1 mole of He has 6.02x10^23 He atoms

so 2.7 moles of He has 2.7x6.02x10^23 He atoms

the total mass loss for 2.7 moles of He created in a fusion reaction

= 2.7x6.02x10^23 x 4.59x10^-29kg

= 7.46x10^-5kg

radiation energy released from this fusion reaction

= 7.46x10^-5 x 9x10^16J

= 6.7x10^12J

its 60 BILLION times more than burning carbon!!


7 0
3 years ago
Read 2 more answers
The pH of a solution decreases by 2.0. How does the hydronium ion concentration of the solution change?
Alexxandr [17]
The Hydronium ion concentration increases to 100 times the original concentration (10^2)
3 0
3 years ago
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A student takes the elevator up to the fourth floor to see her favorite physics instructor. She stands on the floor of the eleva
never [62]

Answer:

N = 1364 N

Explanation:

given data

accelerate upward = 5.70 m/s²

mass = 88.0 kg

solution

normal force is in upward direction so, weight of the student in downward direction and acceleration is in upward direction so formula is express as

N - mg = ma        ...........................1

N = m × (g+a)

put here value

N = 88.0 × (9.8 + 5.70)

N = 1364 N

8 0
3 years ago
PLEASE HELP!!
IrinaK [193]

Answer:

A

Explanation

i think its a not 100% sure though.

7 0
3 years ago
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