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Dafna11 [192]
3 years ago
9

Waxing or waning moon?

Physics
1 answer:
Dennis_Churaev [7]3 years ago
7 0

Answer:

waning gibbious

Explanation:

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Please help ! Which of the following objects has the greatest momentum?
shusha [124]

Answer:

maybe the third one....

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3 years ago
Two like-charged particles are placed close to each other. How would the force of repulsion be affected if the charge on one of
astra-53 [7]

Answer: It will remain the same

Explanation:

According to <u>Coulomb's Law:</u>    

<em>"The electrostatic force F_{E} between two point charges q_{1} and q_{2} is proportional to the product of the charges and inversely proportional to the square of the distance d that separates them, and has the direction of the line that joins them".  </em>

<em />

Mathematically this law is written as:  

F_{E}=K\frac{q_{1}.q_{2}}{d^{2}} (1)

Where:  

F_{E}  is the electrostatic force  

K is the Coulomb's constant  

q_{1}=q_{2}=q are the electric charges , which in this case have the same positive charge

d is the separation distance between the charges

Rewritting we have:

F_{E}=K\frac{q^{2}}{d^{2}}    (2)

Now, if the first charge is doubled:

q_{1}=2q_

And the second is reduced to a half:

q_{2}=\frac{1}{2}q

We will have the following:

F_{E}=K\frac{(2q)(\frac{1}{2}q)}{d^{2}} (3)

F_{E}=K\frac{q^{2}}{d^{2}} (4)

As we can see equation (4) is equal to equation (2), this means the force of repulsion between both charges will remain the same

8 0
3 years ago
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In an area in which electricity costs 8 cents/kilowatt-hour, a 5 kW clothes dryer runs for 90 minutes to dry a load of laundry.
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$0.60
90 mins is 1.5 hrs
5 kW × 1.5 = 7.5 kWh
7.5 kWh × $0.08 = $0.60
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A small 16 kilogram canoe is floating downriver at a speed of 4 m/s. What is the canoe's kinetic energy?
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Kinetic Energy,K.E=1/2MV²

mass,m=16kg

velocity,v=4m/s

K.E=1/2×16×4²

=128kgm²/s²

=128 Joules

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A ball at rest starts rolling down a hill with a constant acceleration of 3.2 meters/second2. What is the final velocity of the
leva [86]
Used an app called Mephyso to do the calculation.

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