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3 years ago

Please help fast science homework

Physics

1 answer:

Leokris [45]3 years ago

5 0

Answer:

The solar cells transfer light energy to thermal energy.

When the battery is being charged up, chemical energy is transferred to electrical energy.

The motor is designed to transfer potential energy to kinetic energy.

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A straight wire carries a current of 10 A at an angle of 30° with respect to the direction of a uniform 0.30-T magnetic field. F

Dimas [21]

Answer:

Explanation:

Given that,

Current in wire is

I = 10A

And the current makes an angle of 30° with respect to the magnetic field

Then, θ = 30°

And the magnetic field is

B = 0.3 T

Length of the wire is

L = 0.5m

Force on the wire F?

The force on the wire in calculated using

F = iL × B

Where

The magnitude of the cross produce of L and B is

L × B = LB•Sinθ

Then, force becomes

F = iLB•Sinθ

F = 10 × 0.5 × 0.3 × Sin30

F = 0.75 N

The force on the wire is 0.75 Newton

6 0

2 years ago

Read 2 more answers

A sinusoidal wave has the following wave function: y(x,t) = (2.5 m) sin[(3.0 m-1) x – (24 s-1) t + π/2] What is the frequency of

Vera_Pavlovna [14]

Answer:

3.82 Hertz

Explanation:

$y = 2.5 Sin\left (3x-24t+\frac{\pi }{2} \right )$

This is the equation of a wave which varies sinusoidally.

The standard equation of a wave is given by

$y = A Sin\left ( kx-\omega t+\phi \right )$

where, A be the amplitude of the wave, k be the wave number, x be the displacement of wave, ω be the angular frequency and t be the time taken, and Ф be the phase angle.

now compare the given equation by the standard equation, we get

k = 3

ω = 24

Ф = π / 2

So, the angular frequency = 24

The relation between the angular frequency and the frequency is given by

ω = 2 x π x f

24 = 2 x 3.14 x f

f = 3.82 Hertz

4 0

3 years ago

Shivering to warm up illustrates which characteristic of life? A. adaptation to environment B.homeostasis C.getting energy D.gro

Neporo4naja [7]

Homeotasis is the answer
Homeostasis is the process in which the human body maintains equilibrium between hot and cold and if our body does not have this process maybe we could die

6 0

3 years ago

Is horsepower the only thing to be considered when purchasing a piece of equipment?Explain.

Novosadov [1.4K]

Answer:

Mostly yes

Explanation:

But you should consider,brand value, material used and lasting of the equipment also

1HP=720W

HP stands for horsepower

It's mostly used in pumps

8 0

2 years ago

Read 2 more answers

A 1050 kg sports car is moving westbound at 13.0 m/s on a level road when it collides with a 6320 kg truck driving east on the s

Dmitriy789 [7]

Answer:

(A) V = 9.89m/s

(B) U = -2.50m/s

(D) ΔK.E = –257750J

Explanation:

The full solution can be found in the attachment below. The east has been chosen as the direction for positivity.

This problem involves the principle of momentum conservation. This principle states that the total momentum before collision is equal to the total momentum after collision. This problem is an inelastic kind of collision for which the momentum is conserved but the kinetic energy is not. The kinetic energy after collision is always lesser than that before collision. The balance is converted into heat by friction, and also sound energy.

See attachment below for full solution.

5 0

3 years ago