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3 years ago

Becomes solid above the melting point

Physics

1 answer:

Whitepunk [10]3 years ago

5 0

All liquids become solid, above the melting point!!! Hope this helps!!!

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A student weighing 200N climbs a flight of stairs 7.0m high in 8s. What power is required to perform this task?

noname [10]

Answer:

Power required, P = 175 watts

Explanation:

It is given that,

Weight of a student, F = mg = 200 N

The student climbs a flight of stairs of height, h = 7 m

Time taken, t = 8 s

We have to find the power required to perform this task. Work done per unit time is called the power required. Mathematically, it is given by :

$P=\dfrac{W}{t}$

W = work done

t = time taken

$P=\dfrac{mgh}{t}$

$P=\dfrac{200\ N\times 7\ m}{8\ s}$

P = 175 watts

Hence, the power required to complete this task is 175 watts.

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4 years ago

What is the peak power consumption of a 120-v ac microwave oven that draws 10. 0 a.

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The peak power consumption of a 120-V AC microwave oven that draws 10.0 A? is 2400 W.

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2 years ago

When observed from earth, how many oscillations does the pendulum on the spaceship undergo compared to the pendulum on earth in

Roman55 [17]

Answer: it’s Fewer oscillations.

Explanation:

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3 years ago

A 2-m long string is stretched between two supports with a tension that produces a wave speed equal to vw=50.00m/s. What are the

svetoff [14.1K]

Answer

given,

Length of the string, L = 2 m

speed of the wave , v = 50 m/s

string is stretched between two string

For the waves the nodes must be between the strings

the wavelength is given by

$\lambda = \dfrac{2L}{n}$

where n is the number of antinodes; n = 1,2,3,...

the frequency expression is given by

$f = n\dfrac{v}{2L}$

now, wavelength calculation

n = 1

$\lambda_1 = \dfrac{2\times 2}{1}$

λ₁ = 4 m

n = 2

$\lambda_2 = \dfrac{2\times 2}{2}$

λ₂ = 2 m

n =3

$\lambda_3 = \dfrac{2\times 2}{3}$

λ₃ = 1.333 m

now, frequency calculation

n = 1

$f = n\dfrac{v}{2L}$

$f_1 =1\times \dfrac{50}{2\times 2}$

f₁ = 12.5 Hz

n = 2

$f = n\dfrac{v}{2L}$

$f_2 =2\times \dfrac{50}{2\times 2}$

f₂= 25 Hz

n = 3

$f = n\dfrac{v}{2L}$

$f_3 =3\times \dfrac{50}{2\times 2}$

f₃ = 37.5 Hz

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3 years ago

An object of volume 0.0004m^3 and density 6000kg/m^3 is immersed inside a fluid of density 5000kg/m^3. The force exerted by the

FromTheMoon [43]

We have that the density of the fluid is

$\rho_f=178.57 kg/m3$

From the question we are told that

object of volume 0.0004m^3

density 6000kg/m^3

fluid of density 5000kg/m^3.

Force F=0.7N

Generally the equation for the Force is mathematically given as

$F= v*\rho_f*g\\\\0.7= 0.0004*\rho_f*9.8\\\\\rho_f=\frac{0.7}{0.0004*9.8}$

$\rho_f=178.57 kg/m3$

For more information on this visit

brainly.com/question/13338592?referrer=searchResults

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3 years ago