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SpyIntel [72]
3 years ago
5

What is the effect of a magnetic field on a stationary electric charge on a moving electric charge?

Physics
1 answer:
daser333 [38]3 years ago
3 0
If we have a moving electric charge with the velocity v, then the magnetic field will produce a force F=q*v*B*sinθ where q is the charge, v is the velocity, B is the strength of the magnetic field and θ is the angle of the velocity and the magnetic field. The force will only change the direction of the charge, and it's magnitude will be the greatest when the velocity and the magnetic field are perpendicular to each other and no force will act on the charge if θ=0. If the velocity of the charge is 0, again there is no force on the charge. We can get the direction of the force with the right hand rule. 
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Two 110 kg bumper cars are moving toward each other in opposite directions. Car A is moving at 8 m/s and Car Z at –10 m/s when t
Marysya12 [62]
From the law of conservation of momentum
m1u1+ m2u2= m1v1+ m2v2
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v2= 8 m/sec
8 0
3 years ago
Explain why it is better to jump and land with bent knees rather than straight legs? Use key physics vocabulary.
BigorU [14]

Answer:

Bent knees

Explanation:

Depending the height your jumping from, if you were jumping from a high structure it's best if you jump and land on knees so you dont sprang your ankles from jumping and landing on your straight legs, you could even pull a muscle if you land on straight legs.

3 0
2 years ago
A block with mass m 2.00 kg is placed against a spring on a frictionless incline with angle 30 degrees (Fig. B-43). (The block i
guajiro [1.7K]

Answer:

Explanation:

a )

The stored elastic energy of compressed spring

= 1 / 2 k X²

= .5 x 19.6 x (.20)²

= .392 J

b ) The stored potential energy will be converted into gravitational potential energy of the block earth system when the block will ascend along the incline . So change in the gravitational potential energy will be same as stored elastic potential energy of the spring that is .392 J .

c ) Let h be the distance along the incline which the block ascends.

vertical height attained ( H ) =h sin30

= .5 h

elastic potential energy = gravitational energy

.392 = mg H

.392 = 2 x 9.8 x .5 h

h = .04 m

4 cm .

=

7 0
3 years ago
Power windmills turn in response to the force of high-speed drag. For a sphere moving through a fluid, the resistive force, FR i
Crazy boy [7]

Answer:

The answer is 20727w

Explanation:

The formula is below;

P = d r^2 v^3 *efficiency

In the question, it is stated that the registration ignores efficiency so we are going to ignore efficiency in the equation and use it this way;

P = d r^2 * v^3

d =4.3, r = 1.59, v =n 12.4

Therefore, P = 4.3 X 1.59^2  X 12.4^3 = 20727W

3 0
3 years ago
In most materials, as heat energy is absorbed, density
PtichkaEL [24]

Answer:

In most materials, as heat energy is absorbed, the density decreases. IF a certain object is heated, it might appear bigger than usual because it expands as the molecules inside moves faster than usual. However the mass of it stays the same while the density decreases.

5 0
3 years ago
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