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Marizza181 [45]
4 years ago
7

The Sun converts 4 × 109 kg of mass to energy every second. How many years would it take the Sun to convert a mass equal to the

mass of Earth to energy?
Physics
2 answers:
Darya [45]4 years ago
5 0

Answer:

7.665×10^7 year

Explanation:

It is given that the Sun convert 4×10^9 kg of mass into energy every second

We have to find that how much time Sun will take to convert mass of earth into energy

The mass of earth is 9.67×10^{24} so the time required to convert this mass into energy =\frac{9.67\times 10^{24}}{4\times 10^9}=2.417\times 10^{15}sec=7.665\times 10^7\ year

So the required time will be 7.665×10^7 year

natulia [17]4 years ago
3 0

Answer:

4.74 x 10⁷ yr

Explanation:

m = Rate of conversion of mass to energy by sun = 4 x 10⁹ kg/s

t = total time taken to convert mass of earth to energy

M = mass of earth = 5.98 x 10²⁴ kg

Using the equation

M = m t

5.98 x 10²⁴ = (4 x 10⁹) t

t = 1.495 x 10¹⁵ sec

we know that, 1 yr = 3.154 x 10⁷ sec

t = (1.495 x 10¹⁵ sec)  (3.154 x 10⁷ sec)⁻¹ yr

t = 4.74 x 10⁷ yr

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Holding force constant, what will be the effect of increasing the Moment arm?
Murljashka [212]

Answer:

(b) Torque will increase.

Explanation:

Torque is given as the product of force and moment arm (radius).

τ = F x r

F = τ / r

where;

F is force

τ  is torque

r is radius (moment arm)

Keeping force constant, we will have the following;

τ ∝ r

This shows that torque is directly proportional moment arm (radius), thus increase in moment arm, will cause increase in torque.

For instance;

let the constant force = 5 N

let the initial moment arm, r = 2m

Torque, τ  = 5 N x 2m = 10 Nm

When the moment arm is increased to 4 m

Torque, τ  = 5 N x 4m = 20 Nm

Therefore, at a constant force, increasing in the Moment arm, will cause increase in torque.

Coorect option is "(b) Torque will increase."

5 0
3 years ago
How does the end point differ from the equivalence <br>point of a titration?​
Gwar [14]

<u>Answer:</u>

<em>Equivalence point and end point are terminologies in pH titrations and they are not the same. </em>

<u>Explanation:</u>

In a <em>titration the substance</em> added slowly to a solution usually through a pippette is called titrante and the solution to which it is added is called titrand. In acid-base titrations acid is added to base or base is added to acid.the strengths of the <em>acid and base titrated</em> determines the nature of the final solution.

At equivalence point the <em>number of moles of the acid</em> will be equal to the number of moles of the base as given in the equation.  The nature of the final solution determines the <em>pH at equivalence point. </em>

<em>A pH less than 7 will be the result if the resultant is acidic and if it is basic the pH will be greater than 7. </em>In a strong base-strong acid and weak base-weak acid titration the pH at the equivalence point will be 7 indicating <em>neutral nature of the solution. </em>

3 0
3 years ago
Ohm's law relates the current, voltage, and resistance in a circuit. Use Ohm's law to determine what will happen to the remainin
krek1111 [17]

Answer:

   R = ½ R₀

Explanation:

This is an exercise in Ohm's law,

           V = IR

in the initial case

           V₀ = I₀ R₀               (1)

indicates that the voltage remains constant and the current is doubled

             I = 2 I₀

           V₀ = I R

             

we substitute

           V₀ = 2 I₀ R

            R = ½ V₀ / I₀

we replace by equation 1

            R = ½ R₀

8 0
4 years ago
Is the us warmer than antarctica?
Likurg_2 [28]

Answer:

Yes

Explanation:

Antarctica is usually always cold.

7 0
3 years ago
F a forklift raises a 76-kg load a distance of 2.5 m, about how much work has it done?
sleet_krkn [62]

W= FxD. Since the weight is not put into force you’re going to convert it by multiplying it by 9.8 (gravity). 76kg x 9.8 = 7448. Then multiply that by the distance (2.5). Your answer is 1862.

6 0
3 years ago
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