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3 years ago

At what frequency does the driver of the car hear the ambulance’s siren? The velocity of sound in air is 343 m/s.

Physics

1 answer:

Katarina [22]3 years ago

4 0

956.602hz.

Sorry for the late answer, just came across this.

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What happens to its kinetic energy when its reaches the maximum height ?

drek231 [11]

when it reaches the maximum height, all the energy has now been converted into potential energy.when a ball is thrown straight upto into the air,all its initial kinetic energy converted into gravitational potential energy when it reaches its maximum height

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3 years ago

What is the fundamental frequency of a particular medium ?

VLD [36.1K]

From my research, the question has the following choices:

a.the lowest frequency at which a standing wave is possible
b. the highest frequency at which s standing wave is possiblec. the only frequency at which a standing wave is possible
d. the only frequency at which standing wave is not possible

From there, the correct answer is A.

5 0

3 years ago

Read 2 more answers

Q1) Write True or False for each statement:

Alchen [17]

Answer:

True

Explanation:

it is true because blabla bla

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2 years ago

A water balloon launcher uses an elastic band with a spring constant of 115 N/m. To use the launcher, you stretch the band back

Lorico [155]

Here elastic balloon launcher will behave like an ideal spring

so here we have

spring constant k = 115 N/m

mass of balloon = 1.3 kg

Part a)

Stretch in the band is given as

x = 0.8 m

now the force on the balloon is given by

F = k x

now from above

$F = (115) (0.8) = 92 N$

so it will exert 92 N force on it

Part b)

Elastic potential energy is given as

$U = \frac{1}{2}kx^2$

so here we have

$U = \frac{1}{2}(115)(0.8)^2$

$U = 36.8 J$

Part c)

Here in this case we can say that kinetic energy gained by the balloon must be same as the elastic potential energy stored in the rubber because there is no energy loss in this system

So kinetic energy = 36.8 J

Part d)

As we know by the formula of kinetic energy

$K = \frac{1}{2}mv^2$

$36.8 = \frac{1}{2}(1.3)v^2$

$v = 7.52 m/s$

so speed of the balloon will be 7.52 m/s

7 0

3 years ago

Read 2 more answers

1. Velocity and speed are both calculated by using what formula?

ValentinkaMS [17]

Explanation:

Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.

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3 years ago