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2 years ago

How much heat is required to increase the temperature of 1 kg of steel from 21 °C to 22 °C?

Physics

1 answer:

Stella [2.4K]2 years ago

8 0

Answer:

466J

Explanation:

Given parameters:

Mass of steel = 1kg = 1000g

Initial temperature = 21°C

Final temperature = 22°C

Unknown:

Amount of heat required for this temperature increase = ?

Solution:

To solve this problem, we use the expression below:

So;

Heat absorbed = mass x specific heat of steel x change in temperature

Specific heat of steel = 0.466J/g°C

Therefore;

Heat absorbed = 1000 x 0.466 x (22 - 21) = 466J

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Concept Simulation 20.4 provides background for this problem and gives you the opportunity to verify your answer graphically. Ho

77julia77 [94]

Answer:

The time constant is 1.049.

Explanation:

Given that,

Charge $q{t}= 0.65 q_{0}$

We need to calculate the time constant

Using expression for charging in a RC circuit

$q(t)=q_{0}[1-e^{-(\dfrac{t}{RC})}]$

Where, $\dfrac{t}{RC}$ = time constant

Put the value into the formula

$0.65q_{0}=q_{0}[1-e^{-(\dfrac{t}{RC})}]$

$1-e^{-(\dfrac{t}{RC})}=0.65$

$e^{-(\dfrac{t}{RC})}=0.35$

$-\dfrac{t}{RC}=ln (0.35)$

$-\dfrac{t}{RC}=-1.049$

$\dfrac{t}{RC}=1.049$

Hence, The time constant is 1.049.

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2 years ago

A horizontal force of 100 N is required to push a 50 kg crate across a factory floor at a constant speed. What is the accelerati

luda_lava [24]

Answer:

a = 2m/s^2

Explanation:

Force (F) = 100 N

Mass (m) = 50 kg

Here,

F = m×a

100 = 50 × a

a = 100÷50

a = 2m/s^2

Thus, the acceleration on the cart is a = 2m/s^2

-TheUnknownScientist

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2 years ago

Describe the effects of heat

astraxan [27]

1. Heat raises the temperature.

2. It increases volume.

3. It changes state.

4. Brings about chemical action.

5. Changes physical properties.

<h3>Hope this helps :)</h3>

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1 year ago

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Virty [35]

Just because the book is moving doesn't tell you anything about the forces on it, or even whether there ARE any.

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2 years ago

Which is NOT one of the four principals of Dalton’s atomic theory?

Gre4nikov [31]

Answer:

Your answer would be letter B. Electrons orbit the nucleus in energy level.

Explanation:

Hope it helps..

Just correct me if I'm wrong, okay?

But ur welcome!!

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2 years ago

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