3 years ago

Honey solidifies from the bottom whereas water from the top. Why?

1 answer:

7 0

Answer:

it is due to anamolous expansion of water as water cools from 4dg.c to 0dg.c. it expand making ice lighter than water to float

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A vector starts at the point (0, 0) and ends at (3, 1). What is the magnitude and direction of the displacement?

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Answer:

tbh vector does not have any direction at all the answer is 0

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2 years ago

Pie

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Explanation:

it compresses hot air turning into cool air almost like a reverse tornado

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3 years ago

Read 2 more answers

M=20kg F=10N d=25m<br>Work done=?

fomenos

w=f×d

w=10N×25m

w=250Nm

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2 years ago

A basketball of mass 0.23kg is thrown horizontally against a rigid vertical wall with a velocity of 20m/s. It rebounds with a ve

Anna11 [10]

Answer:

$8.1\:\mathrm{Ns}$

Explanation:

The impulse-momentum theorem gives the impulse on an object to be equal to the change in momentum of that object. Since mass is maintained, the change in momentum of the basketball is:

$\Delta p = m\Delta v$ , where $m$ is the mass of the basketball and $\Delta v$ is the change in velocity.

Since the basketball is changing direction, its total change in velocity is:

$\Delta v = 20-(-15)=35\:\mathrm{m/s}$ .

Therefore, the basketball's change in momentum is:

$\Delta p = m\Delta v = 0.23\cdot 35= 8.05=8.1\:\mathrm{kg\cdot m/s}$ .

Thus, the impulse on the basketball is $\fbox{$8.1\:\mathrm{Ns}$}$ (two significant figures).

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2 years ago

A horizontal string fixed at both ends is oscillating in a standing wave pattern. Consider the vertical motion of a point on the

Naddika [18.5K]

Answer:

All of the choices are correct except the nodes, which don't move at all.

Explanation:

when a horizontal string fixed at both ends is oscillating in a standing wave pattern the antinodes move with simple harmonic motion while the node is stationary.

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3 years ago