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3 years ago

For a current to flow continuously through a circuit, the circuit must be:

Physics

1 answer:

BabaBlast [244]3 years ago

8 0

Answer:

An electrical current is an electrical charge flowing around a circuit. Carried by billions of tiny particles called electrons, the charge is already in the wires.

Explanation:

There are three basic conditions for the electric current flow is to be given below:-

The loop must be shuttered where current throws occur.

There must be some possible distinctions in the chain.

The medium in which current flows will be a conductor (but flow in the semiconductor at a higher temp. current).

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Which equation is used to calculate the weight of an object on a planet?

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In this case to find the weight of an object you must use the formula.

W = mg

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Which circuit is a series circuit ?? plz help

gregori [183]

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In the first three options, the current has multiple paths it can go through. So these three circuits are parallel and not series.

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3 years ago

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Why does a lorry travelling at 30mph have more kinetic energy than a car travelling at the same velocity?

rjkz [21]

Answer:

Because it has more mass

Explanation:

To understand this, think about the equation of kinetic energy

KE = $\frac{1}{2}$ m $v^{2}$

Kinetic energy depends on both the velocity (v) as well as the mass (m).

Because a lorry is bigger and heavier than a car, it will have more mass. With more mass, at the same velocity the lorry with have more kinetic energy.

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3 years ago

You're driving down the highway late one night at 20 m/s when a deer steps onto the road 41m in front of you. Your reaction time

nordsb [41]

Answer:

Maximum speed you could have and still not hit the deer = 24.07 m/s

Explanation:

Let the maximum speed you could have and still not hit the deer be y.

Your reaction time before stepping on the brakes is 0.50s.

Distance traveled during this time = 0.5y

A deer steps onto the road 41m in front of you

Remaining distance to deer = 41 - 0.5y

The maximum deceleration of your car is 10 m/s²

We have equation of motion, v² = u² + 2as

Initial velocity, u = y m/s

Final velocity, v = 0 m/s

Acceleration, a = -10 m/s²

Displacement, s = 41 - 0.5y

Substituting,

v² = u² + 2as

0² = y² + 2 x -10 x (41 - 0.5y)

20(41 - 0.5y) = y²

820 - 10 y = y²

y² + 10 y -820 = 0

y = 24.07 m/s or y = -34.06 m/s(not possible)

Maximum speed you could have and still not hit the deer = 24.07 m/s

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3 years ago

Two cars collide inelastically and stick together after the collision. Before the collision, the magnitudes of their momenta are

dolphi86 [110]

Answer:

a) P1+P2

Explanation:

The magnitude of their combined momentum is just the addition of each momentum, because in this case of inelastic collision, the kinetic energy of the two cars are both converted to some form of energy because the velocity of both cars becomes zero, i.e., V=0, making P = mv = 0, this means the magnitude of P1 + P2 = 0.

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3 years ago