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Greeley [361]
2 years ago
11

A ship's fathometer (an echo sounder) transmits a sound pulse and records the return of an echo 7.4 seconds later. If the speed

of sound in water is 1500 m/second, what is the water depth in meters
Physics
1 answer:
ira [324]2 years ago
6 0

Based on the velocity of sound in water,  the depth of the water is 5550 m.

<h3>What is the depth of the water if a transmitted sound pulse returns  an echo 7.4 seconds later?</h3>

The velocity of sound in water =  1500 m/s

Time taken to receive the echo = 7.4 seconds

  • Distance travelled by sound = speed * time

Distance = 1500 * 7.4

Distance = 11100 m

Since this is a to and fro distance covered

  • Depth of the water = distance travelled/ 2

Depth of water = 11100/2

Depth of water = 5550 m

Therefore, the depth of the water is 5550 m.

Learn more about echo and sound at: brainly.com/question/14090821

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The heat capacity of nickel is 0.444 J/(g · °C). Calculate the amount of heat needed to raise the temperature of 18 g of nickel
azamat

The final speed of the nickel at the given quantity of heat is determined as 202.1  m/s.

<h3>Final speed of the nickel</h3>

Apply the principle of conservation of energy.

Q = mcΔθ

Q = (18)(0.444)(66 - 20)

Q = 367.63 J

Q = K.E = ¹/₂mv²

2K.E = mv²

v = √(2K.E/m)

where;

  • v is the final speed

v = √(2 x 367.63)/(0.018))

v = 202.1 m/s

Learn more about speed here: brainly.com/question/4931057

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Tom rides his motorcycle at a speed of 15 meters/second for an hour.
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the equation of motion is given for a particle when s is in meters and t is in seconds. Find the acceleration after 4.5 seconds
ki77a [65]

Answer:

Explanation:

The question is incomplete.

The equation of motion is given for a particle, where s is in meters and t is in seconds. Find the acceleration after 4.5 seconds.

s= sin2(pi)t

Acceleration = d²S/dt²

dS/dt = 2πcos2πt

d²S/dt² = -4π²sin2πt

A(t) = -4π²sin2πt

Next is to find acceleration after 4.5 seconds

A(4.5) = -4π²sin2π(4.5)

A(4.5) = -4π²sin9π

A(4.5) = -4π²sin1620

A(4.5) = -4π²(0)

A(4.5) = 0m/s²

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2 years ago
Write the first equation of motion. Under what condition(s) is this equation valid?​
Zepler [3.9K]

Explanation:

The first equation of motion in kinematics is given by :

v=u+at .....(1)

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Equation (1) is valid when the object is moving with constant acceleration. This equation gives relation between velocity and time.

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3 years ago
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