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Afina-wow [57]
3 years ago
14

What is a simple machine?

Physics
1 answer:
sweet-ann [11.9K]3 years ago
5 0
A is the answer to this question
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A 0.110-kg cube of ice (frozen water) is floating in glycerine. The glycerine is in a tall cylinder that has an inside radius of
creativ13 [48]

Answer

 Δ h = 0.06 m

Explanation:

Given,

mass of ice cube = 0.11 Kg

inside radius of cylinder = 3.70 cm

density of water = 1000 Kg/m³

density of glycerin = 1260 Kg/m³

ice cube is floating on glycerin surface,

net force on the cube is equal to zero.

Buoyant force by glycerin is equal to the weight of cube

     B = W

  \rho_g V g = m g

  \rho_g (\pi r^2 h_1)= m

  h_1= \dfrac{m}{\rho_g\pi r^2}

  h_1= \dfrac{0.11}{1260\pi\times 0.037^2}

          h₁ = 0.0203 m

when ice melts it is completely turned into water

  Volume of mass m of water

  V = \dfrac{m}{\rho_w}

  \pi r^2 h_2 = \dfrac{m}{\rho_w}

  h_2 = \dfrac{m}{\rho_w\pi r^2}

  h_2 = \dfrac{0.11}{1000\pi\times 0.037^2}

         h₂ = 0.0803 m

distance by which height of liquid change

 Δ h = h₂ - h₁

 Δ h = 0.0803 - 0.0203

 Δ h = 0.06 m

6 0
3 years ago
A 0.45kg football is thrown in the air and travels at a velocity of 26m/s. Calculate the momentum of the football.
Maslowich

Answer:

11.7 I don't really know the unit for momentum, I think its p but I don't know

Explanation:

u have to multiply to get the momentum

3 0
3 years ago
A block attached at the end of a spring undergoes simple harmonic motion with frequency of oscillation ω.
Ad libitum [116K]

Explanation:

Let \omega is the frequency of oscillation of a block that undergoes  simple harmonic motion. The frequency of oscillation is given by :

\omega=\sqrt{\dfrac{k}{m}}...............(1)

Where

k is the spring constant of the spring

m is the mass of the block

It is clear from equation (1) that the frequency of the oscillation depends on the spring constant and the mass of the block. So, on increasing the spring constant, the block oscillate with a greater frequency.

3 0
3 years ago
Read 2 more answers
A spherical cavity is excised from the inside of the sphere. The cavity has radius a4 and is centered at position h⃗ , where |h⃗
kompoz [17]

Answer:

Electric field =h/3Eo

Explanation:

Because of the intrisic notation and symbol necessary for the solution please refer to the attached file

6 0
3 years ago
Imagine you have just witnessed a small avalanche on a mountain while skiing, and two slushy snowballs just crashed together in
inn [45]
We have that the momentum p is given by the formula p=mv where m is the mass and v is the velocity. Since for A p=-14kgm/s and m=7, we have that the velocity is -14/7=-2m/s. Hence its speed is 2 m/s.
For b we have that p=15kgm/s and v=3m/s. Because m=p/v, we have m=3kg.
We also have that the momentum is conserved in this system. Hence, the net sum of the momentum of the 2 snowballs equals the momentum of the single giant ball. Hence, p(total)=p(combined)=-14+15=1kgm/s (momentum is a vector; the positive sign means that it tends to the positive direction).

6 0
4 years ago
Read 2 more answers
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