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2 years ago

An electromagnet needs a magnetic metal core. To produce a magnetic field, what else is required?

Physics

1 answer:

a_sh-v [17]2 years ago

5 0

Answer:

Explanation:

A solenoid is the wraps of conducting wire wrapped around the metal core .

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Which statement describes an example of static electricity?

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Answer:a

Explanation:

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3 years ago

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A car collides head on with a stationary sign. The collision brings the car to a stop, but the sign does not move.

olga_2 [115]

A.a sign that breaks loose from the ground when a force is applied to it

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3 years ago

What is the relationship between power and voltage?

kipiarov [429]

<u>Answer:</u>

The power and voltage are related through Power Rule .

<u> Explanation : </u>

Power Rule states that the current I that flows the element in the circuit with a loss in voltage V, then the amount of power dissipated by that element in the circuit is the multiplicative product of voltage and the current.

Mathematically, power law is

$\boldsymbol{P}=\boldsymbol{I} \times \boldsymbol{V}$

The rate of work done or the rate of energy consumption or production is termed as power.Unit of power is denoted as W(watts).

Potential energy between any two points on a circuit is called as Voltage and is measured in volts (V) .

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3 years ago

What is a natural resource?

sladkih [1.3K]

Answer:

A natural resource is something found in nature that people use.

Explanation:

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4 years ago

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The froghopper Philaenus spumarius is supposedly the best jumper in the animal kingdom. To start a jump, this insect can acceler

Kay [80]

Answer:

Part a)

$v_f = 4 m/s$

Part b)

$t = 0.001 s$

Part c)

$d = 0.815 m$

Explanation:

Part a)

As we know that initially the grass hopper is at rest at the ground position

Now the acceleration is given as

$a = 4000 m/s^2$

distance of the legs that it stretched is given as

$s = 2.0 mm$

so we have

$v_f^2 - v_i^2 = 2 a d$

$v_f^2 - 0 = 2(4000)(0.002)$

$v_f = 4 m/s$

Part b)

time taken to reach this speed is given as

$v_f - v_i = at$

$4 - 0 = 4000 t$

$t = 0.001 s$

Part c)

as the grass hopper reach the maximum height its final speed would be zero

so we will have

$v_f^2 - v_i^2 = 2 a d$

$0 - 4^2 = 2(-9.81) d$

$d = 0.815 m$

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3 years ago