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alisha [4.7K]
3 years ago
8

Which of the following is true?

Physics
1 answer:
shusha [124]3 years ago
4 0

Answer:

C.

The Earth and Moon both exert a gravitational force on each other.

Explanation: just did it booom

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A force of 13 N is used to slide a 0.8 kg book across a table. What is the magnitude of the book’s acceleration?
Mkey [24]

Explanation:

acceleration=F/m

a=13/0.8

a=16 25m/s²

8 0
4 years ago
What types of areas are more prone to floods?
geniusboy [140]
Areas with poor drainage system
6 0
3 years ago
Solids that have flat sides and a repeating pattern of atoms are called ______________.
DiKsa [7]
 they are called crystals

7 0
4 years ago
How many joules of heat are needed to raise the temperature of 50.0 g of aluminum from 10°C to 110°C, if the specific heat of al
dusya [7]

Answer:

Heat required to raise the temperature of the aluminium is 4750 J

Explanation:

As we know that the heat energy required to raise the temperature of the aluminium is given as

Q = ms\Delta T

here we know that

m = 50 g

\Delta T = 110 - 10

\Delta T = 100 ^oC

so we have

Q = 50(0.95)(100)

Q = 4750 J

5 0
4 years ago
If a m = 74.7 kg m=74.7 kg person were traveling at v = 0.800 c v=0.800c , where c c is the speed of light, what would be the ra
igomit [66]

Answer:

\frac{E}{E_c} =3.125

Explanation:

The kinetic energy of a rigid body that travels at a speed v is given by the expression:

E_c=\frac{1}{2} mv^2

The equivalence between mass and energy established by the theory of relativity is given by:

E=mc^2

This formula states that the equivalent energy E can be calculated as the mass m multiplied by the speed of light c squared.

Where c is approximately 3\times 10^{8} m/s

Hence:

E_c=\frac{1}{2} (74.7)*(0.8*3\times 10^{8} )^2=2.15136\times 10^{18} J

E=(74.7)*(3\times 10^{8} )^2 =6.723\times 10^{18} J

Therefore,  the ratio of the person's relativistic kinetic energy to the person's classical kinetic energy is:

\frac{E}{E_c} =\frac{6.723\times 10^{18}}{2.15136\times 10^{18}} =3.125

4 0
3 years ago
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