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3 years ago

Describe the energy transformations that occur in a waterfall...

Physics

2 answers:

Leno4ka [110]3 years ago

5 0

At the top of the waterfall, the water has potential energy. Once it goes over

VLD [36.1K]3 years ago

3 0

The waterfall has potential Energy

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An unstable particle at rest spontaneously breaks into two fragments of unequal mass. The mass of the first fragment is 3.00 10-

kirill [66]

Answer:0.478 c

Explanation:

Given

mass of lighter Particle $(m_1)=3\times 10^{-28} kg$

mass of heavier Particle $(m_2)=1.51\times 10^{-27} kg$

speed of lighter particle $(v_1)=0.834 c$

Let speed of heavier particle $=v_2$

and Momentum of the particle is given by

$P=\frac{mv}{\sqrt{1-(\frac{v}{c})^2}}$

$P_1=\frac{m_1v_1}{\sqrt{1-(\frac{v_1}{c})^2}}$

$P_1=\frac{3\times 10^{-28}\times 0.834 c}{\sqrt{1-(\frac{0.834 c}{c})^2}}$

$P_1=8.219\times 10^{-28} kg c$

$P_2=\frac{m_2v_2}{\sqrt{1-(\frac{v_2}{c})^2}}$

as momentum is conserved therefore $P_1=P_2$

$8.219\times 10^{-28} kg c=\frac{1.51\times 10^{-27}\times v_2}{\sqrt{1-(\frac{v_2}{c})^2}}$

$v_2=0.478 c$

3 0

3 years ago

What is the most appropriate SI unit to express the speed of a cyclist in a 10-km race?

Tatiana [17]

Your answer should be A.km/s does s mean speed?

5 0

3 years ago

Read 2 more answers

E Describe the meaning of a line crossing the x-axis in a velocity-time graph.

gizmo_the_mogwai [7]

Answer:

A line crossing the x-axis in a velocity-time graph means that the moving object has changed its direction.

Explanation:

Velocity-Time graph:

A velocity-time graph is a two dimensional graph with velocity at its y-axis and time at its x-axis. At any point, value of y represents the velocity and value of x represents the time. The slope of the graph gives us the acceleration or deceleration of the moving object.

In a velocity-time graph:

- A straight line represents constant velocity.

- A diagonal line means that the velocity of a body is changing.

*Referring to the figure attached with the answer*

The velocity of the moving object increases at a constant rate for the first 10 minutes. Then the velocity is 60 m/min for the next 5 minutes. After that the velocity is decreasing. Till 30th minute when the velocity is at 0 m/min.

What happens here?

Velocity is a vector quantity. It has some direction. In a velocity-time graph, we are only concerned with two directions of velocity:

- Forward direction

- Backward direction

So, the object stops at 30th minute and starts moving in the reverse direction after that with an increasing velocity. The point where the line cuts the x-axis is basically the point where the object starts moving in the reverse direction.

8 0

3 years ago

After running for a while, the fan becomes hot to the touch, and ever so often releases ___________________ energy into the air.

kykrilka [37]

Answer:

thermal

Explanation:

4 0

3 years ago

Fill in the blanks for the following statement: ________ distillation allows for a more efficient separation of volatile liquids

vladimir1956 [14]

Answer:

A) Fractional
E) Decreasing

Explanation:

Fractional distillation allows for a more efficient separation of volatile liquids by decreasing the distance between the distillation pot and the collection vessel.

3 0

2 years ago