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Anuta_ua [19.1K]

2 years ago

13

A 10 kg piece of aluminum (which has a specific heat of 900 j/kgoc) is warmed so that its temperature increases by 5.0c. how muc

h heat was tranferred into it

1 answer:

navik [9.2K]2 years ago

6 0

Use the formula
Heat= mass x specific heat x temperature increase

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g A simple pendulum (consisting of a point mass suspended by a massless string) on the surface of the earth has a period of 1.00

leonid [27]

Answer:

Explanation:

The formula for time period of a pendulum is given as follows :

T = 2π $\sqrt{\frac{l}{g} }$

l is length of pendulum and g is acceleration due to gravity .

So time period of pendulum is not dependent on the mass of the pendulum . If time period is same and length is also the same then acceleration due to gravity will also be the same . Hence the acceleration due to gravity at distant planet will be same as that on the earth.

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2 years ago

A circular hole in an aluminum plate is 2.739 cm in diameter at 0.000°C. What is the change in its diameter when the temperature

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Answer:

$L = 2.746 cm$

Explanation:

As we know that thermal expansion coefficient of aluminium is given as

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now we also know that after thermal expansion the final length is given as

$L = L_o(1 + \alpha \Delta T)$

here we know that

$L_o = 2.739 cm$

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now we will have

$L = 2.739(1 + 24 \times 10^{-6} (108))$

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3 0

3 years ago

A large helium filled balloon is used as the center piece for a graduation party. The balloon alone has a mass of 222 kg and it

inn [45]

Answer:

The buoyant force is 3778.8 N in upward.

Explanation:

Given that,

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Where, $\rho_{air}$ = density of air

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2 years ago

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Masteriza [31]

Answer:

true

Explanation:

as long as you are interested, you are happy

4 0

2 years ago

Positive electric charge Q is distributed uniformly throughout the volume of an insulating sphere with radius R.From the express

AlladinOne [14]

Answer:

Vb = k Q / r r <R

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The electic potential is defined by

ΔV = - ∫ E .ds

We calculate the potential in the line of the electric pipe, therefore the scalar product reduces the algebraic product

VB - VA = - ∫ E dr

Let's substitute every equation they give us and we find out

r> R

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We evaluate with it Va = 0 for r = infinity

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We perform the calculation of the power with the expression of the electric field that they give us

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8 0

3 years ago