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3 years ago

A. A man of 100 kg mass is standing on the surface of the earth of mass 6 × 1024 kg and

Physics

1 answer:

Alexxx [7]3 years ago

7 0

Answer:

m1=100kg

m2=6×10^24kg

r=6400km

G=6.6×10^-11

F=?

as we know that

F=G m1.m2/r²

F=6.6×10^-11×100×6×10^24/(6400)²

F=6.6×10^-11×6×10^26/4.096×10^7

F=6.6×10^-11×1.465×10^19

F=9.67×10^8N

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A toaster oven uses67,500 joules of energy in 45 seconds to toast a piece of bread what is the power of the oven

Tcecarenko [31]

If you simply divide joules by seconds, the answer is in units
of joules/sec (watts) which is exactly what you want.

(67,500 joules) / (45 sec) = 1,500 joules/sec = 1,500 watts

7 0

3 years ago

calculate the time (in years) it would take to send a message to the Galactic Capitol located at the center of our Milky Way gal

Alinara [238K]

Answer:

The total time is $\bf{52850~Yr}$ .

Explanation:

Given:

The distance between Galactic Capitol and Earth is, $d = 2.5 \times 10^{20}~m$

The speed of light is, $c = 3 \times 10^{8}~m/s$

The time taken by the message to reach and come back to Earth is given by

$t &=& \dfrac{2d}{c}\\~~&=& \dfrac{2(2.5 \times 10^{20}~m)}{3 \times 10^{8}~m/s}\\~~&=& 1.6 \times 10^{12}~s\\~~&=& \dfrac{1.6 \times 10^{12}~s}{(86400 \times 365)~s}~Yr\\~~&\approx& 52849~Yr$

In addition they take 1 year to decide to reply.

Thus, the total time is $25850~Yr$ .

7 0

3 years ago

The mechanical energy of a bicycle at the top of a hill is 6,000 J. The bicycle stops at the bottom of the hill by applying the

Semmy [17]

Answer:

Thermal energy produce =4,000 J.

Explanation:

Given that

Mechanical energy at the top of hill = 6,000 J

Mechanical energy at the bottom of hill = 2,000 J

We know that energy is conserve

Energy at top of hill = energy at bottom of hill + Thermal energy produce

So now by putting the values

Energy at top of hill = energy at bottom of hill + Thermal energy produce

6,000 = 2,000+ Thermal energy produce

Thermal energy produce =6,000-2,000 J

Thermal energy produce =4,000 J.

As we know that thermal energy produce due to friction when one mechanical component slides on the other mechanical component then always heat is generated and this heat is known as thermal energy.

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3 years ago

The force involves the attraction between objects with mass. Strong nuclear. Gravitational. Electromagnetic. Weak nuclear

Viktor [21]

The answer is Gravitational.

4 0

3 years ago

Read 2 more answers

Explain the benefits of understanding sound waves properties in real life.

Tems11 [23]

Answer:

The vibrations from sound waves cause our ears to send signals to our brains to create sound. The speed of sound waves will determine the sound's pitch, or how high or low something sounds. Sound waves are important because they allow us to hear important messages and emergency signals to protect ourselves.

Explanation:

I hope this helps :)

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2 years ago