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2 years ago

Which system of units is used by only a small number of countries in the world, including the u.s

Physics

2 answers:

Len [333]2 years ago

3 0

Answer:

imperial system

Explanation:

rjkz [21]2 years ago

3 0

Answer:

british system

Explanation:

A P E X

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Which of the following is a heterogeneous mixture .

lianna [129]

Answer:

chicken noodle soup

Explanation:

Heterogenous mixture is the mixture where you can see differnt parts of it, hence "hetero".

you can see chicken, noodles, and broth in chicken noodle soup

5 0

2 years ago

We know the frequency range of certain sounds are: 400-560 Hz, what are the ranges of wavelength in meters when the signal trans

Ksivusya [100]

Answer:

Range of wavelength will be $5.35\times 10^5m$ to $7.5\times 10^5m$

Explanation:

We have given range of frequency is 400-560 Hz

Speed of the light $c=3\times 10^8m/sec$

We have to find the range of the wavelength of signal transmitted

Ween know that velocity is given by $v=\lambda f$ , here $\lambda$ is wavelength and f is frequency

So for 400 Hz frequency wavelength will be $\lambda =\frac{c}{f}=\frac{3\times 10^8}{400}=7.5\times 10^5m$

And wavelength for frequency 560 Hz $\lambda =\frac{c}{f}=\frac{3\times 10^8}{560}=5.35\times 10^5m$

So range of wavelength will be $5.35\times 10^5m$ to $7.5\times 10^5m$

8 0

2 years ago

A 7 kg ball is moving at a constant speed of 5 m/s. A force of 300 N is applied to the ball for 4 s. The new speed of the ball i

olasank [31]

Answer:

The new speed of the ball is 176.43 m/s

Explanation:

Given;

mass of the ball, m = 7 kg

initial speed of the ball, u = 5 m/s

applied force, F = 300 N

time of force action on the ball, t = 4 s

Apply Newton's second law of motion;

$F = ma = \frac{m(v-u)}{t}\\\\m(v-u) = Ft\\\\v-u = \frac{Ft}{m}\\\\v = \frac{Ft}{m} + u$

where;

v is new speed of the ball

$v = \frac{Ft}{m} + u\\\\v =\frac{300*4}{7} + 5\\\\v = 176.43 \ m/s$

Therefore, the new speed of the ball is 176.43 m/s

8 0

2 years ago

____ crust forms the ocean floors

Fittoniya [83]

Answer:

lithosphere

Explanation:

6 0

2 years ago

Read 2 more answers

2. What energy source produces most of the electrical energy in the United States?

Minchanka [31]

Answer:

Nat gas

Explanation:

Approx:

Natural gas 38% coal 21% oil 19%

6 0

1 year ago