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2 years ago

7

Circle O has a circumference of approximately 44 in. Circle O with diameter d is shown. What is the approximate length of the di

ameter, d?

2 answers:

Zanzabum2 years ago

7 0

The answer is 14.001

GrogVix [38]2 years ago

5 0

Answer:

14.001 in

Explanation:

Circumference = pi * diameter

Circumference / pi = diameter

44 inches/pi = 14.001 inches

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A 2kg block of which material would require 450 joules of thermal energy to increase its temperature by 1 degree Celsius?

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Explanation:

When an amount of energy Q is supplied to a sample of material of mass m, the temperature of the material increases by $\Delta T$ , according to the following equation :

$Q=mC_s \Delta T$

where $C_s$ is the specific heat capacity of the material.

In this problem, we have:

m = 2 kg = 2000 g is the mass of the unknown material

$Q = 450 J$ is the amount of energy supplied to the block

$\Delta T = 1^{\circ}C$ is the change in temperature of the material

Solving the equation for $C_s$ , we can find the specific heat capacity of the unknown sample:

$C_s = \frac{Q}{m \Delta T}=\frac{450}{(2000)(1)}=0.225 J/(g^{\circ}C)$

And by comparing with tabular values, we can find that this value is approximately the specific heat capacity of tin.

Learn more about specific heat capacity:

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1 m/s can also be written as 1 m*s^-1

Therefore:

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Substitute the values into the formula.

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Divide and note that the meters (m) will cancel each other out.

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$f=20 \ s^{-1}$

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