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Reil [10]
3 years ago
8

How does the speed and velocity of an object differ

Physics
1 answer:
Angelina_Jolie [31]3 years ago
7 0

Explanation:

answer is that velocity is the speed with a direction, while speed does not have a direction.

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Two electric charges, held a distance, d, apart experience an electric force of magnitude, F, between them. If one of the charge
Aneli [31]

Answer:

When one of charge is doubled, the magnitude of the force between them gets doubled.

Explanation:

The electric force between two electric charges is given by :

F=k\dfrac{q_1q_2}{d^2}

Here,

k is the electrostatic force

d is the separation between charges

q_1\ and\ q_2 are charges

If one of the charges is doubled in magnitude while maintaining the same separation between the charges, q_1'=2q_1

New force becomes,

F'=k\dfrac{q_1'q_2'}{d'^2}

F'=k\dfrac{(2q_1)q_2'}{d'^2}

F'=2k\dfrac{q_1q_2'}{d'^2}

When one of charge is doubled, the magnitude of the force between them gets doubled. Hence, this is the required solution.

7 0
4 years ago
a 20 of of ice at 0c is dropped into water at boiling point, specific heat capacity of water =4200 J/kg•c, sepesific latent heat
Contact [7]

Answer:

15 KJ

Explanation:

The quantity of heat (Q) required is given as:

Q = mcΔθ + mL

where m is the mass of ice, c is its specific heat capacity, L is its specific latent heat andΔθ is the change in temperature.

Given: m = 20g, temperature of ice = 0^{o} C, specific heat capacity of water = 4200 J/kg^{o} C, latent heat of fusion of ice = 3.3 x 10^(5) J/kg, temperature of water = 100^{o} C.

Q = m (cΔθ + L)

   = 0.02(4200 x (100) + 330000)

   = 0.02(420000 + 330000)

  = 0.02 (750000)

Q = 15000

Q = 15000 Joules

Q = 15KJ

The quantity of heat needed to complete the conversion is 15 KJ.

4 0
3 years ago
someone help me please
Lemur [1.5K]

Answer:

but for helping we need yr ques nd they r not here

4 0
3 years ago
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A ) Find the current through the 20 A resistor.
Vadim26 [7]

Answer:

Power is associated by many people with electricity. Knowing that power is the rate of energy use or energy conversion, what is the expression for electric power? Power transmission lines might come to mind.

5 0
3 years ago
430 in scientific notation would be _____.
Gre4nikov [31]
You move the decimal until it is in front of a number (not zero) 4.3 times 10^2
8 0
3 years ago
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