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3 years ago

Why superconductors are expensive and uncommon ? please give me a simple and a easy answer

Physics

1 answer:

andrezito [222]3 years ago

6 0

Answer:

Superconductors are expensive and uncommon because they are additionally complicated to fabricate properly.

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A car traveling at 21 m/s starts to decelerate steadily. It comes to a complete stop in 6 seconds. What is its acceleration? Ans

allsm [11]

-3.5mls squared = a

0mls = 21mls + a(6s)
-21mls/6s

The equation used in this is vf = vi + at

Hope this helps!

4 0

3 years ago

4. The blades on a fan have a frequency of 15 Hz.

vichka [17]

Answer:

a) 4500 cycles b) 0.0667s c) 6.67s

Explanation:

a) 15 Hz= 15 cycles/ s

5 mins= 300s

15 cycles/s * 300s= 4500 cycles

b) Period= 1/ frequency

Period= 1/ 15 cycles/s

Period= 0.0667s

c) Period * number of revolutions= time

0.0667 * 100= 6.67s

6 0

4 years ago

What average power must be supplied to the rope to generate sinusoidal waves that have amplitude 0.200 m and wavelength 0.600 m

pychu [463]

Complete question:

A taut rope has a mass of 0.123 kg and a length of 3.54 m. What average power must be supplied to the rope to generate sinusoidal waves that have amplitude 0.200 m and wavelength 0.600 m if the waves are to travel at 28.0 m/s ?

Answer:

The average power supplied to the rope to generate sinusoidal waves is 1676.159 watts.

Explanation:

Velocity = Frequency X wavelength

V = Fλ ⇒ F = V/λ

F = 28/0.6 = 46.67 Hz

Angular frequency (ω) = 2πF = 2π (46.67) = 93.34π rad/s

Average power supplied to the rope will be calculated as follows

$P_{avg} =\frac{1}{2} \mu \omega^2 A^2 V$

where;

ω is the angular frequency

A is the amplitude

V is the velocity

μ is mass per unit length = 0.123/3.54 = 0.0348 kg/m

$P_{avg} =\frac{1}{2} ( 0.0348)(93.34 \pi )^2 (0.2)^2 (28)$ = 1676.159 watts

The average power supplied to the rope to generate sinusoidal waves is 1676.159 watts.

6 0

3 years ago

A 77-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.

jekas [21]

Answer:

Explanation:

From the question, we can see that the elevator is at a constant speed, invariably, acceleration is zero. And thus, there is no external force acting in the man, asides from force of gravitation acting on the man between those 5s. Now, we solve the question using newton's second law of motion.

The second law of motion states that, "the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object."

Summation Fy = ma(y)

F(n) - F(g) = 0

F(n) - mg = 0

F(n) = mg

F(n) = 77*9.81

F(n) = 755.37N

6 0

3 years ago

Read 2 more answers

An 6 kg object accelerating from 17 m/s to 10 m/s. What is the change in momentum of the object?

Oksana_A [137]

Answer:

the change is = 17 × 10 = 170 =28.33

3 0

3 years ago