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olasank [31]
3 years ago
13

a particle of mass m and charge q moving with velocity v in a magnetic field B. The velocity of the particle is perpendicular to

the field, and the particle is moving in a circle
Physics
1 answer:
Lerok [7]3 years ago
3 0

Explanation:

When a charged particle describes a circular path in a uniform magnetic field, the charged particle experiences a magnetic force  towards the center of circular path, according to Fleming's left hand rule. Therefore the magnetic force and velocity (tangent to circular path) are perpendicular to each other during the circular motion. As the direction of displacement, is the direction of velocity, hence force and displacement are perpendicular to each other.

Therefore work done by magnetic force,

                                         W=Fscos90=0

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it's made of land, rocks, water and many more

Explanation:

if you think about it, mountains are just giant rocks. and the ocean is water and land is... well land

8 0
3 years ago
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The amount of energy in a photon of light is proportional to the
blondinia [14]
The amount of energy of a photon is proportional to the frequency.
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3 years ago
Explain the importance of resistors in a circuit. Cite some instances to prove this example.
Arisa [49]
A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat, may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical
7 0
3 years ago
Water is poured into a bowl at a constant rate of 17.0 cm^3/s. The bowl has a circular cross section, but does not have a unifor
7nadin3 [17]

Answer:

10.29 cm/s

Explanation:

Discharge in to the bowl = 17.0 cm³/s

Diameter of the bowl, d₁ = 1.45 cm

Now,

Rate at which water level rise at its diameter = \frac{\textup{Discharge}}{\textup{Area of cross-section}}

also,

Area of cross-section = \frac{\pi}{\textup{4}}\times1.45^2

or

Area of cross-section = 1.651 cm²

Therefore,

Rate at which water level rise at its diameter = \frac{\textup{17}}{\textup{1.651}}

or

Rate at which water level rise at its diameter = 10.29 cm/s

8 0
4 years ago
At a separation distance of 0.500-m, two like-charged balloons experience a repulsive force of 0.320 N. If the distance is is de
soldi70 [24.7K]

Answer:

2.9 N

Explanation:

When the separation distance, r, is 0.5 m, the electrostatic force is 0.32 N. Electrostatic force is given as:

F = (k * q1 * q2) / r²

Where F = force acting on the balloons

k = Coulombs constant

Therefore:

0.32 = (k * q1 * q2) / 0.5²

=> k * q1 * q2 = 0.32 * 0.5² ------------(1)

When the distance is decreased by 3, that is r = r/3 = 0.5/3

F = (k * q1 * q2) / (0.5/3)² ------------(2)

Putting (1) into (2):

=> F = (0.32 * 0.5²) / (0.5/3)²

F = (0.32 * 0.5² * 3²) / 0.5²

F = 2.9 N

Therefore, the force would be 2.9 N

3 0
3 years ago
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