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Ulleksa [173]
3 years ago
10

According to Ohm’s law, resistance is equal to voltage divided by

Physics
1 answer:
Delicious77 [7]3 years ago
5 0

Answer:

c) current

Explanation:

Ohm's law states that the current I flowing through a conductor of resistance R is directly proportional to the voltage or potential difference V applied across its terminals provided that the temperature and other necessary conditions remain constant.

Mathematically this law can be written as follows;

V=IR................(1)

When we make R the subject of formula from equation (1), we get the following;

R=\frac{V}{I}...............(2)

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Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 500 above the e
Veronika [31]
<span>We know that semimajor axis is a = (1/2)[(Re + hp)+(Re +ha)]
                                                  = 9.13*106 m
 Re = radius of earth= 6380 km = 6380000 m
 hp = height of perigee = 500 km = 500000 m
ha = height of apogee = 5000 km = 5000000 m
 M = mass of the earth = 5.98*1024 kg
 G = 6.67*10-11 Nm2/kg2
we know that time period of revolution of the spacecraft is
T= 2πa3/2/√GM
 Then T = 2π*(9.13*106 )3/2/√6.67*10-11 *5.98*1024 = 8.67*103 sec

</span><span> mvprp =mvara
 vp = spacecraft's speed at perigee
va=spacecraft's speed at apogee

Then vp /va =ra/rp = (Re+ha)/(Re +hp) = 6380+5000/6380+500
 =1.654 </span><span>

</span>
5 0
4 years ago
A bullet with a mass of 0.04-kg is traveling horizontally at 1400 m/s when it strikes a stationary target that is balanced on th
hammer [34]

The speed of the target with the bullet lodged in it is 5.6 m/s.

<h3>What is speed?</h3>

This is the rate of change of distance.

To calculate the speed of the target and the bullet lodged, we use the formula below.

Formula:

  • V = mu/(m+M)............. Equation 1

Where:

  • V = Speed of the target and the bullet
  • m = mass of the bullet
  • M = mass of the target
  • u = Initial speed of the target

From the question,

Given:

  • m = 0.04 kg
  • u = 1400 m/s
  • M = 9.96 kg

Substitute these values into equation 1

  • V = (0.04×1400)/(0.04+9.96)
  • V = 56/10
  • V = 5.6 m/s

Hence, the speed of the target with the bullet lodged in it is 5.6 m/s.

Learn more about speed here: brainly.com/question/6504879

#SPJ1

4 0
3 years ago
How can you use weights of the filled cell models to determine the rate and direction of diffusion?
nikklg [1K]
Compare the initial mass to the final mass.
7 0
3 years ago
A real flowing fluid A. does not experience turbulence B. has a constant density C. has a constant velocity at a given location
coldgirl [10]
D. exhibits viscosity
6 0
4 years ago
Diamonds are very shiny and tough. Are they metal or non-metal?
Ostrovityanka [42]

Answer:

Non-metal

Explanation:

Diamond is a non metal because diamond is entirely made out of carbon and carbon is a non metal.

Please give brainlyist!!

8 0
3 years ago
Read 2 more answers
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