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3 years ago

1. The unit of power is called a derived unit, why?

Physics

1 answer:

garik1379 [7]3 years ago

4 0

Answer:

Because its depends upon fundamental units and formed by combination of two or more fundamental units.

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A sound wave has a frequency of 741 hz in air a wavelength of 0.47m what is the temperature of the air as soon as the below city

nekit [7.7K]

Answer:

Temperature when sound wave with wavelength 0.47m has frequency 741 hz is 188 degrees Centigrade.

Step-by-Step Explanation:

Given:

Speed of sound at 0 degrees centigrade = 235 ms

frequency = f = 741 hz

wavelength = w = 0.47m

speed of sound wave = wavelength * frequency = 741 * 0.47 = 348.27 m/s

Using the formula for speed of sound at a specific temperature:

Speed of sound at T degrees Centigrade = Speed of sound at 0 degrees + 0.6 * T

When speed of sound is 348 m/s, the temperature is given by:

348 = 235 + 0.6(T)

T = (348-235)/0.6

T = 188 degrees Centigrade

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3 years ago

Why does the amount of water that flows in a river change during the year?

lyudmila [28]

It mainly depends on the season of the year

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3 years ago

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What happens to light as it moves at an angle from a medium that has an

ki77a [65]

Answer:

Explanation:

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3 years ago

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Part CPart complete Determine the maximum force P that can be applied without causing the two 43-kg crates to move. The coeffici

Wewaii [24]

Answer:

the maximum force will be equal to 134.84 N

Explanation:

We have given mass m = 43 kg

Coefficient of static friction $\mu _s=0.32$

Acceleration due to gravity $g=9.8m.sec^2$

We have to find the maximum force which , when applied there is no movement of crates

This maximum force will be equal to frictional force

Frictional force is given by $f=\mu mg=0.32\times 43\times 9.8=134.84N$

So the maximum force will be equal to 134.84 N

3 0

3 years ago

The SAF operates the M113 Ultra APC.

HACTEHA [7]

The volume of the object must be no larger than $11.15 m^3$ .

Explanation:

In order for an object to be able to float in water, its density must be equal or smaller than the water density.

The density of water is:

$\rho = 1000 kg/m^3$

This means that the density of the object must be no larger than this value.

We also know that the density of an object is given by

$\rho = \frac{m}{V}$

where

m is the mass of the object

V is its volume

For the object in this problem, the mass is

$m=1.115\cdot 10^4 kg$

Therefore, we can re-arrange the equation to find its volume:

$V=\frac{m}{\rho}=\frac{1.115\cdot 10^4}{1000}=11.15 m^3$

So, the volume of the object must be no larger than $11.15 m^3$ .

Learn more about density:

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brainly.com/question/8441651

#LearnwithBrainly

8 0

4 years ago