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4 years ago

7

Gravity is a force of action that acts _______.

2 answers:

8090 [49]4 years ago

8 0

I believe the answer is D.

ozzi4 years ago

8 0

D.) on every mass! Gravity is a force that attracts objects towards each other. Any object with mass exerts a force of gravity. The great the mass, the greater the force. The force of gravity between to objects decreases as the objects move further apart.

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Determine the inductance L of a 0.65-m-long air-filled solenoid 3.2 cm in diameter containing 8400 loops.

den301095 [7]

Answer:

The inductance is $L = 0.1097 \ H$

Explanation:

From the question we are told that

The length is $l = 0.65 \ m$

The diameter is $d = 3.2 cm = 0.032 \ m$

The number of loops is $N = 8400$

Generally the radius is evaluated as

$r = \frac{ 0.032 }{2} = 0.016 \ m$

The inductance is mathematically represented as

$L = \frac{ \mu_o * N^2 * A }{ l }$

Here $\mu_o$ is the permeability of free space with value $\mu_o = 4\pi * 10^{-7} N/A^2$

A is the cross-sectional area which is mathematically evaluated as

$A = \pi r^2$

=> $A = 3.142 * (0.016)^2$

=> $A = 0.000804 \ m^2$

=> $L = \frac{ 4\pi * 10^{-7} * 8400^2 * 0.000804 }{ 0.65 }$

=> $L = 0.1097 \ H$

5 0

3 years ago

A truck covers 40.0 m in 7.45 s while uniformly slowing down to a final velocity of 3.50 m/s.

astra-53 [7]

Answer:

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be $-0.5026m/sec^2$

Explanation:

We have given distance covers by truck s = 40 m

Time taken by truck to cover this distance t = 7.45 sec

Final velocity v = 3.50 sec

According to second equation of motion

$S=ut+\frac{1}{2}at^2$

$40=u\times 7.45+\frac{1}{2}\times a\times 7.45^2$

$7.45u+27.751a=40$ -----eqn 1

According to first equation of motion

v = u + at

So $3.5=u+7.45a$ -----eqn2

Solving equation 1 and 2

a = $-0.5026m/sec^2$

And u = 7.244 m /sec

(A) Original velocity will be 7.244 m /sec

(B) Acceleration will be

$-0.5026m/sec^2$

6 0

4 years ago

A TV set is pushed a distance of 2 m with a force of 20 N how much work is done on the set

vladimir2022 [97]

Answer:

40 J

Explanation:

8 0

4 years ago

Which is the best evidence that continents that are now separated were once

Rasek [7]

I’d say It’s B since the plants and fossils are big indicators

3 0

3 years ago

Read 2 more answers

A teacher lifted a 10 N box and placed it down. Did she do any work? Explain your answer using math

Stells [14]

Answer:

i think it is 45 kilograms not really sure?

Explanation:it might be wrong but i think it is right

8 0

3 years ago