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HACTEHA [7]
3 years ago
14

17. The number of waves that pass a particular point in a body in a unit of time is called the _______ of the waves. A. rarefact

ion B. amplitude C. frequency D. compression
Physics
1 answer:
EastWind [94]3 years ago
3 0
<span>The number of waves that pass a particular point in a body in a unit of time is called the frequency of the waves. The unit of requency is Hz (hertz). The frequency counts how many cycles were made per second</span>
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A record turntable rotates through 5.0 rad in 2.8 s as it is accelerated uniformly from rest. What is the angular velocity at th
Usimov [2.4K]

Answer:

\omega_f = 3.584\ rad/s

Explanation:

given,

turntable rotate to, θ = 5 rad

time, t = 2.8 s

initial angular speed  = 0 rad/s

final angular speed = ?

now, using equation of rotational motion

\theta = \omega_i t + \dfrac{1}{2}\alpha t^2

5 = 0+ \dfrac{1}{2}\alpha\times 2.8^2

\alpha= \dfrac{10}{2.8^2}

       α = 1.28 rad/s²

now, calculation of angular velocity

\omega_f = \omega_i + \alpha t

\omega_f =0 +1.28\times 2.8

\omega_f = 3.584\ rad/s

hence, the angular velocity at the end is equal to 3.584 rad/s

4 0
3 years ago
The percentage of incident light radiation reflected back to space is termed albedo. True or false?
liubo4ka [24]

Answer:True

Explanation:

Albedo is a unit-less, non-dimensional quantity that shows how well a surface reflects solar energy. The value of albedo can vary from 0 to 1, 0 being the black and 1 refers to a white surface. Zero means Surface is a perfect absorber i.e. it absorbs all the incoming rays incidents on it. Albedo 1 means the surface is a perfect reflector.

Albedo usually applies for visible light, even though it may involve some of the infrared regions of the electromagnetic spectrum. The average albedo associated with earth surface is 30%

8 0
3 years ago
What is your velocity if it takes you 40 seconds to walk around a circle of 50meters 3 times?​
Shtirlitz [24]

Answer:

0 m/s

Explanation:

Velocity is displacement over time.  Displacement is the distance between your initial position and your final position.  If you walk in a circle, you end up back where you started, so your displacement is 0.  Therefore, your velocity is also 0.

8 0
3 years ago
Read 2 more answers
How does the mass of an electron compare to the mass of a proton?
harina [27]

Answer:

The mass of an electron is only about 1/2000 the mass of a proton.

Explanation:

6 0
3 years ago
A wave transfers _____ from the source outward in the direction of wave motion.
Angelina_Jolie [31]

Answer

b. energy

Explanation:

wave is a disturbance that carries energy from one particle to another particle.

4 0
3 years ago
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