All categories

3 years ago

What is the frequency of a wave?

Physics

2 answers:

Andrei [34K]3 years ago

5 0

It is the number of waves passing a point in a certain time.

Tasya [4]3 years ago

5 0

yeah, the answer would be the amount of cycles that occur in a given time.

hope this helps!

You might be interested in

When fireworks explode, sound and light are produced. These are examples of(1 point)

ollegr [7]

Answer: macroscopic outputs

Explanation:

5 0

3 years ago

a 3.18-kg rock is released from rest at a height of 26.6 m. ignore air resistance and determine (a) the kinetic energy at 26.6 m

antiseptic1488 [7]

Answer:

(a) 0 J

(b) 828.96 J

(c) 828.96 J

(d) 828.96 J

(e) 0 J

(f) 828.96 J

Explanation:

Given:

Mass of the rock is, $m=3.18\ kg$

Initial height of the rock is, $h_{i}=26.6\ m$

Final height of the rock is, $h_f=0\ m$

Initial velocity of the rock is, $v_i=0\ m/s(Rest)$

Acceleration due to gravity is, $g=9.8\ m/s^2$

(a)

Initial kinetic energy is given as:

$K_i=\frac{1}{2}mv_i^2$

Plug in the given values and solve for ' $K_i$ '. This gives,

$K_i=\frac{1}{2}\times 3.18\times 0^2=0$

Therefore, initial kinetic energy is 0 J.

(b)

Initial potential energy is given as:

$U_i=mgh_i\\U_i=3.18\times 9.8\times 26.6=828.96\ J$

Therefore, initial potential energy is 828.96 J.

(c)

Mechanical energy is equal to the sum of kinetic and potential energy. It is always a constant value. Therefore,

$ME=K_i+P_i\\ME=0+828.96=828.96\ J$

Therefore, mechanical energy at 26.6 m is 828.96 J.

(d)

Now, at the final height of 0 m, the decrease in potential energy will be equal to the increase in the kinetic energy. In other words, the potential energy at the start will be converted to kinetic energy at the bottom.

Therefore, kinetic energy at the 0 m is given as:

$K_f=U_i=828.96\ J$

(e)

Potential energy at the final height is given as:

$P_f=mgh_f=3.18\times 9.8\times 0=0\ J$

Therefore, final potential energy is 0 J.

(f)

Total mechanical energy is a constant and doesn't depend on the height.

So, total mechanical energy at 0 m is same as that at 26.6 m.

Total mechanical energy is 828.96 J.

8 0

4 years ago

At a certain distance, the sound intensity level of a dog's bark is 59 dB. At that same distance, the sound intensity of a rock

babymother [125]

Answer:

102 dB

Explanation:

Intensity level is given by:

$I(dB)=10log\frac{I}{I_o}$

$59=10log\frac{I_d}{I_o}\\I_d=10^{5.9}I_o$

$I_r=2\times10^4I_d=2\times10^4\times10^{5.9}I_o$

$I_r(dB)=10log\frac{I_r}{I_o}\\=10log\frac{2\times 10^{9.9}I_o}{I_o}=10\times10.2\\=102 dB$

3 0

4 years ago

What are the assumptions on which the cosmological principle is based?.

prisoha [69]

Homogeneity and isotropy, On large enough scales, the Universe looks pretty much the same in all directions. The big bang theory is based on two assumptions: the first is centered around Einstein's general theory of relativity, which accurately describes gravity and the interactions of matter; and the second, also known as the cosmological principle, asserts that the universe is homogeneous and isotropic on a large enough scale.

Hope this helps!
Please give Brainliest!

4 0

2 years ago

What must you do if you plan to exercise everyday

kumpel [21]

Answer: set up a reminder so you won't forget also try clearing your schedule so you can have more time

5 0

4 years ago

Read 2 more answers