3 years ago

Which of the following is true?

Physics

1 answer:

shusha [124]3 years ago

4 0

Answer:

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

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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