PHYSICS HIGH SCHOOL

A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.7 1010 m (inside the orbit of Mercury), at which point its speed is 9.5 104 m/s. Its farthest distance from the Sun is far beyond the orbit of Pluto. What is its speed when it is 6 1012 m from the Sun? (This is the approximate distance of Pluto from the Sun.)

Answers

Answer 1

Answer:

Answer:

58515.9 m/s

Explanation:

We are given that

$d_1=4.7* 10^(10) m$

$v_i=9.5* 10^4 m/s$

$d_2=6* 10^(12) m$

We have to find the speed (vf).

Work done by surrounding particles=W=0 Therefore, initial energy is equal to final energy.

$K_i+U_i=K_f+U_f$

$(1)/(2)mv^2_i-(GmM)/(d_1)=(1)/(2)mv^2_f-(GmM)/(d_2)$

$(1)/(2)v^2_i-(GM)/(d_1)+(GM)/(d_2)=(1)/(2)v^2_f$

$v^2_f=2((1)/(2)v^2_i-(GM)/(d_1)+(GM)/(d_2))$

$v_f=\sqrt{2((1)/(2)v^2_i-(GM)/(d_1)+(GM)/(d_2))}$

Using the formula

$v_f=\sqrt{v^2_i+2GM((1)/(d_2)-(1)/(d_1))}$

$v_f=\sqrt{(9.5* 10^4)^2+2* 6.7* 10^(-11)* 1.98* 10^(30)((1)/(6* 10^(12))-(1)/(4.7* 10^(10)))$

Where mass of sun= $M=1.98* 10^(30) kg$

$G=6.7* 10^(-11)$

$v_f=58515.9 m/s$

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Which of these components is not necessary for current to flow in a series or parallel circuit?A. wire
B. switch
C. resistor
D. All of these are needed.

Answers

Current requires only an EMF source ... like a battery, or a current already flowing ... and a conducting path ... like wire, ionized air, or something dissolved in water. A switch isn't needed unless you want a quick, easy way to STOP the current. A resistor isn't needed unless you want to be able to dissipate some energy from the current, or limit its magnitude.

What is the velocity of a plane that traveled 3,000 miles from New York to California in 4.5 hours

Answers

Answer:

v = 666.67 mph

Explanation:

It is given that,

Distance from New York to California is 3000 miles

Time taken fromNew York to California is 4.5 hours

We need to find the velocity of a plane. Velocity is equal to the distance over time. So,

$v=(d)/(t)\n\nv=\frac{3000\ \text{miles}}{4.5\ \text{hour}}\n\nv=666.67\ \text{mph}$

So, the velocity of the plane is 666.67 mph.

What group does paracetamol come under

Answers

Paracetamol is grouped within the 'painkillers' category.

For the examples below, explain what a physical change or a chemical change has occurred. Justify your answerA. When you mix baking soda and vinegar, carbon dioxide is released.
B. You build a tall sand castle at the beach. After wave washes it over, the sand castle turns into a big pile of sand
C. Boiling water turns a raw egg into a hard boiled egg
D. Max divided cookie dough into small pieces on a cookie sheet.
E. A loaf of freshly baked bread tastes better and looks much different than a lump of bread dough
F. A glass of water is left in the Sun. In the time, the water evaporates leaving the glass empty.

Answers

A. chemical change, a new substance is formed and the effect cannot be undone.
B.physical change, there is no new substance made and the effect can be undone
C.chemical change, the effect cannot be undone
D.physical change, the effect can be undone
E.chemical change, a new substance is made and the effect cannot be undone
F.physical change, there is no new substance and the effect can be reversed

hope this helps :)

Which of the following describes the measure of current? a. The quality of the charge flow
b.The rate at which charge flows
c. The ability for something to have a charge flow
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Answers

Current is defined as the rate at which charge flows. The quantity that is current is directly affected by the voltage and the resistance of the circuit, where current is directly proportional to the voltage, and inversely to the resistance.

Among the choices, the correct answer is B.

What causes a bolt of lightning? A. Electrical charges build up in the clouds only.

B. Electrical charges build up on the ground only.

C. Electrical charges build up in the clouds and on the ground.

D. Electrical charges build up in the space between the clouds and the ground.

Answers

As we know that Lightning is an electric current.
The positive charge that is present in the ground connects with the negative charge that is present in the clouds and a spark of lightning strikes.
so a bolt of lightning is caused because
Electrical charges build up in the clouds and on the ground
so correct option is C
hope it helps

The causes of bolt lighting is Electrical charges build up in the clouds and on the ground.

What is bolt lighting?

Lightning refer to spark of electriccharges or lighting which is a a result of positive and negative electrical charges which is as a result of thunder or storm.

Therefore, The causes of bolt lighting is Electrical charges build up in the clouds and on the ground.

Learn more about bolt lighting below.

brainly.com/question/1619949

#SPJ5

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