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3 years ago

What are the characteristics of high energy wave?

Physics

1 answer:

Ivahew [28]3 years ago

8 0

Answer:

D. High frequency and short wavelengths.

Explanation:

If a wave is high in energy it will have a higher frequency.

High frequency = short wavelengths

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A solid cylinder of radius 10.0 cm rolls down an incline with slipping. The angle of the incline is 30°. The coefficient of kine

erik [133]

To solve this problem it is necessary to apply the expressions related to the calculation of angular acceleration in cylinders as well as the calculation of linear acceleration in these bodies.

By definition we know that the angular acceleration in a cylinder is given by

$\alpha = \frac{2\mu_k g cos\theta}{r}$

Where,

$\mu_k$ = Coefficient of kinetic friction

g = Gravitational acceleration

r= Radius

$\theta$ = Angle of inclination

While the tangential or linear acceleration is given by,

$a = g(sin\theta-\mu_k cos\theta)$

ANGULAR ACCELERATION, replacing the values that we have

$\alpha = \frac{2\mu_k g cos\theta}{r}$

$\alpha = \frac{2(0.4)(9.8) cos(30)}{10*10^{-2}}$

$\alpha = 67.9rad/s$

LINEAR ACCELERATION, replacing the values that we have,

$a = (9.8)(sin30-(0.4)cos(30))$

$a = 1.5m/s^2$

Therefore the linear acceleration of the solid cylinder is $1.5 m/s^2$

8 0

3 years ago

A ball rolls from x = - 5m to x = 0m in 1 second . What was its average velocity? (Units = m/s) Don't forget: velocities and dis

katrin2010 [14]

Answer:

+ 5 m/s

Explanation:

change in displacement = ΔX=final position - initial position

ΔX = 0-(-5) =0+5 =+ 5 m

average velocity = ΔX/t

= +5/1

= + 5 m/s

positive sign shows that ball rolls towards right

8 0

4 years ago

What happen to the weight of a body when it is falling freely under the action of gravity?

mr Goodwill [35]

Answer:

Explanation:

where W-weight, m-mass of the object and g-acceleration produced due to the earth's gravity. ... This happens because the normal reaction force exerted on the object in the lift is equal to zero, and normal force equals to mg, which in turn equals the weight of the object.

6 0

3 years ago

A biker can ride at 12 m/s on a level road when there is no wind and at 7.5 m/s on a level road when there is a head wind of 5 m

alexandr402 [8]

Answer:

The answer is " $1.94 \ m^2$ ".

Explanation:

Formula:

$F= \frac{1}{2} \times C_D \times density \times area \times velocity^2\\\\Power (P) = F \times velocity \\\\P = \frac{C_D}{2} \times density \times area \times velocity^3\\$

Given value:

$\ P = 10.25 \ W \\\\\ density = 1.2 \ kg/m^3 \\\\\ velocity= 2.5 \\\\$

$10.25 = \frac{C_D A}{2} \times 1.2 \times 2.5^3\\\\C_D A= \frac{10.25 \times 2 }{1.2 \times 2.5^3}\\\\C_D A = 1.94 m^2\\$

8 0

3 years ago

Velocity of a car that travled 120 miles in 2 hours

Sophie [7]

60 Miles per hour 60 times 2 is 120

4 0

3 years ago

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