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3 years ago

2 examples of mechanical waves would be: *

Physics

2 answers:

Digiron [165]3 years ago

6 0

Answer:

electromagnetic waves such as visible light are not mechanical because they can travel through the vacuum of space to reach us from the sun. Mechanical waves include water waves, sound waves, earthquake waves, and many more.

vovikov84 [41]3 years ago

5 0

C. sound waves and water waves

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300 Jules energy are used to push an object with a force of 75N. what is the maximum distance the object can move?

Artyom0805 [142]

Energy consumed in doing the work = 300 Joules

Force applied on the object = 75 N

Let the distance moved by the object be d.

Work done by the force is determined by the force applied and the displacement happened in the direction of the force applied.

Work done = Force x displacement

300 = 75 x d

$d = \frac{300}{75}$

d = 4 m

Hence, the maximum distance moved by the object = 4 meters

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3 years ago

Two circular holes, one larger than the other, are cut in the side of a large water tank whose top is open to the atmosphere. Ho

lidiya [134]

Answer: $\frac{r_1}{r_2}=1.565$

Explanation:

Given

two holes are made with different sizes

Hole 1 is large in size and hole 2 is small

If the volume flow rate of water is same for both the hole then small hole must be below the large hole because for same flow rate, velocity of water is large while cross-sectional area is small so it compensate to give same flow for both the holes.

Now for radius apply Bernoulli's theorem at hole 1 and 2

$P_1+\rho gh_1=P_{atm}+\frac{1}{2}\rho v_1^2$

$P_2+\rho g6h_2=P_{atm}+\frac{1}{2}\rho v_2^2$

if hole 1 is h distance below water surface then $h_2=6h$

and $P_1=P_2=P_{atm}$

Also $v_1=\sqrt{2gh}$

$v_2=\sqrt{2g(6h)}$

and $Q=A_1v_1=A_2v_2$

$A=\pi r^2$

thus $\dfrac{r_1}{r_2}=\sqrt{\dfrac{v_2}{v_1}}$

$\dfrac{r_1}{r_2}=\sqrt{\dfrac{\sqrt{6h}}{\sqrt{h}}}$

$\frac{r_1}{r_2}=1.565$

5 0

3 years ago

Which one is right??

Ulleksa [173]

Answer:

Evaporation of water

Explanation:

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2 years ago

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How does the speed of sound in water compare to the speed of sound in air

AlladinOne [14]

the speed of sound in water is slower than the speed of air

6 0

3 years ago

A bicyclist steadily speeds up from rest to 9.00m/s during a 7.20s time interval. Determine all unknowns and answer the followin

sergiy2304 [10]

Answer:

First, let us make some simplifications in notation. Taking the initial time to be zero, as if time is measured with a stopwatch, is a great simplification. Since elapsed time is

−

, taking

means that

, the final time on the stopwatch. When initial time is taken to be zero, we use the subscript 0 to denote initial values of position and velocity. That is,

is the initial position and

is the initial velocity. We put no subscripts on the final values. That is,

is the final time,

is the final position, and

is the final velocity. This gives a simpler expression for elapsed time—now,

. It also simplifies the expression for displacement, which is now

−

. Also, it simplifies the expression for change in velocity, which is now

−

. To summarize, using the simplified notation, with the initial time taken to be zero,

−

}

Explanation:

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2 years ago