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ivolga24 [154]
3 years ago
10

Sound travels through air at 343 m/s at 20 °C. A bat emits an ultrasonic squeak and hears the echo 0.05 second later . How far a

way was the object that reflected it?
Physics
1 answer:
Rashid [163]3 years ago
7 0

Answer:

Distance of the object is 8.6 m

Explanation:

As we know that the speed of sound at t degree C is given as

v = 332 + 0.6 t

here we know that the temperature is

t = 20 degree C

so we have

v = 332 + 0.6(20)

v = 344 m/s

now we know that bat heard the echo of sound in 0.05 s

so the to and fro distance of the object is d + d = 2d

so we have

2 d = v\times t

2d = 344(0.05)

d = 8.6 m

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barxatty [35]

Answer:

percentage = 6.27 %

Explanation:

As we know that when runner is moving on straight track then the net force on his feet is given as

F_s = mg

while when runner is moving on circular track then we have

F_c = \sqrt{(mg)^2 + (\frac{mv^2}{R})^2}

F_c = m\sqrt{g^2 + \frac{v^4}{R^2}}

F_c = m\sqrt{9.8^2 + \frac{8^4}{18^2}}

F_c = m(10.42)

now percentage change is given as

percentage = \frac{F_c - F_s}{F_s} \times 100

percentage = \frac{m(10.42) - m(9.81)}{m(9.81)}\times 100

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6 0
3 years ago
Small, solid pieces of material that come from rocks or living things are called ____
Over [174]
It will be sediment, that's the only thing can be in a rock and it's a living thing. Sediment is part of a rock so that's your answer this is a 7th grade question not that hard I'm in the 5th grade no officence but enjoy your answer
6 0
4 years ago
he amplitude of a lightly damped harmonic oscillator decreases by 3.0% during each cycle.show answer no attempt what percentage
GrogVix [38]

The percentage of mechanical energy of the oscillator lost in each cycle is 5.91 %.

The formula for mechanical energy in an oscillator is given by

E = 1/2 kA²

It is the sum of elastic potential energy and kinetic energy.

Amplitude is nothing but the maximum displacement moved by a point on vibrating body.

It is given that the amplitude A decreases by 3%, then

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⇒ 5.91% of the mechanical energy is lost in each cycle.

To know more about mechanical energy:

brainly.com/question/4285515

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4 0
1 year ago
what is the magnitude of the compression forces (assumed to be horizontal) acting on both sides of the center board that is sand
Len [333]

F = normal force by each board on each side

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\mu = coefficient of friction = 0.663

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f + f = W

f = W/2

f = 95.5/2 = 47.75 N

frictional force is given as

f = \mu F

47.75 = (0.663) F

F = 72.02 N

4 0
3 years ago
You have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. If the house circuit provides
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Base on the said question or problem that state and ask to calculate the current of the said light bulb and in my further calculation and further analysis, I would say that the current of the light bulb would be 0.0292. I hope you are satisfied with my answer and feel free to ask for more 
7 0
3 years ago
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