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4 years ago

8

Which statement describes the relationship of resistance and current ? Resistance is directly proportional to current because R=

v/I.

1 answer:

joja [24]4 years ago

7 0

Answer:resistance is inversely proportional to current.since r=v/I

Explanation:

resistance(r) is inversely proportional to current.

Since r=v/I

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Which sentence describe newton's third law?

strojnjashka [21]

C. Forces are always in pairs

3 0

3 years ago

What acceleration is produced on a mass of 200g, when a force of 10N is exerted on it?

n200080 [17]

Answer:

f=ma......10N=0.2a....=50m/s

4 0

3 years ago

A 8.0-cm long solenoid has 2000 turns of wire and carries a current of 5.0-A. Calculate the strength of the magnetic field at th

CaHeK987 [17]

Answer:

B = 0.157 T

Explanation:

Given that,

Length of the solenoid, l = 8 cm = 0.08 m

Number of turns in the wire, N = 2000

Current, I = 5 A

We need to find the strength of the magnetic field at the center of the solenoid. It is given by the formula as follows :

$N=\mu_o nI$ , N is number of turns per unit length of solenoid.

So,

$B=4\pi \times 10^{-7}\times \dfrac{2000}{0.08}\times 5\\\\=0.157\ T$

So, the magnetic field at the center of the solenoid is 0.157 T.

6 0

3 years ago

State the mathematical form of universal law of gravitation

Andrew [12]

Answer:

Newton's Universal Law of Gravitation: 'a simple equation, but devastatingly effective'. ... The equation says that the force (F) between two objects is proportional to the product of their masses (m1 and m2), divided by the square of the distance between them.

Explanation:

3 0

4 years ago

A mass m1= 6.20 kg is moving North with a velocity of v1= 13.5m/sec when it collides perpendicularly with another mass m2= 4.40

JulijaS [17]

Answer:

Momentum of mass $m_{1}$ is 83·7 kg m/s towards north

Momentum of mass $m_{2}$ is 38·72 kg m/s towards east

Explanation:

Given

Mass of $m_{1}$ = 6·2 kg

Mass of $m_{2}$ = 4·4 kg

Velocity of mass $m_{1}$ = $v_{1}$ = 13·5 m/s

Velocity of mass $m_{2}$ = $v_{2}$ = 8·8 m/s

Momentum of mass $m_{1}$ = $m_{1}$ × $v_{1}$ = 6·2 × 13·5 = 83·7 kg m/s

Momentum of mass $m_{2}$ = $m_{2}$ × $v_{2}$ = 4·4 × 8·8 = 38·72 kg m/s

As mass $m_{1}$ is moving North, the direction of momentum will also be in that direction because the direction of momentum will be in the direction of velocity

As mass $m_{2}$ is moving East, the direction of momentum will also be in that direction because the direction of momentum will be in the direction of velocity

∴ Momentum of mass $m_{1}$ is 83·7 kg m/s towards north

∴ Momentum of mass $m_{2}$ is 38·72 kg m/s towards east

7 0

3 years ago