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BabaBlast [244]
3 years ago
8

The table and graph below show the distances traveled by two different objects. (3 points)

Physics
1 answer:
Aleks04 [339]3 years ago
5 0

Answer:c

Explanation: the speed of object a changes but b travels at constant speed

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The force of gravity is an inverse square law. this means that, if you double the distance between two large masses, the gravita
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F~1/r²
weakens by 1/4
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4 years ago
The amount of heat needed to increase the temperature of a solid sphere of diameter 2D of the same metal from 4°C to 7°C
aniked [119]

The amount of heat needed to increase the temperature of a solid sphere of diameter 2D of the same metal from 4°C to 7°C is is 8 times the initial amount of heat.

<h3>What is heat?</h3>

The temperature increment will lead to the increase in the internal energy of the object. This internal energy is the heat.

Given is the change in  temperature ΔT = 7-4 =3°C., diameter D to 2D,

Q = Cp x  ρ(4π/3)D³ x 3..................(1)

and Q' = Cp x  ρ(4π/3)(2D)³ x 3

Q' = Cp x  ρ(4π/3)8D³x 3..................(2)

Dividing both the equation, we have

Q' / Q =8

Q' = 8Q

Thus, the amount of heat needed to increase the temperature of a solid sphere of diameter 2D of the same metal from 4°C to 7°C is 8 times the initial amount of heat.

Learn more about heat.

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5 0
2 years ago
An airplane is flying at a velocity of 122.4 m/s. It is getting ready to land so it slows down by accelerating at a rate of -2.8
PIT_PIT [208]

Answer:

115.12

Explanation:

-2.8=v-122.4/2.6

v=115.12

8 0
3 years ago
Who is considered the father of atomic theory?<br> Rutherford<br> Thomson<br> Dalton<br> Democritus
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The answer would be dalton
5 0
4 years ago
Read 2 more answers
an astronaut weighs 8.00x10^2 on the surface of earth. what is the weight of the astronaut 6.37x10^6 meters above the surface of
Marta_Voda [28]
To solve this problem, we use the Law of Universal Gravitation:

F = Gm1m2/d^2

where m1 and m2 are two objects. In this case, earth and man. d is the distance between the objects. Lastly, G is the gravitational constant. Since the mass of the earth and man are constant, this is lumped up with G into k. The equation would be:

F = k/d^2
k = Fd^2
F_{1} d_{1} ^{2} =F_{2} d_{2} ^{2}

The radius of earth, d1, is equal to 6.371E+6 m. Thus, d2 = 2d1

(8E+2)(d1)^2 = F2(2d1)^2

(8E+2)(d1)^2 = 4F2(d1)^2

(8E+2)=4F2
F2 = 200 Newtons
4 0
3 years ago
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