Answer:
see attachment
Explanation:
all four questions have been explained in attachment
If this did not exist, a table you push would keep going forever. Your energy is expressed back to you.
Answer:
s = 1800 m = 1.8 km
Explanation:
The distance, the speed, and the time of reach of the sound are related by the following formula:
where,
s = distance
v = speed
t = time
FOR WATER:
---------------------- eq (1)
where,
s = distance between ship and diver = ?
= speed of sound in water = 1440 m/s
t = time taken by sound in water
FOR AIR:
---------------------- eq (2)
where,
s = distance between ship and diver = ?
= speed of sound in water = 344 m/s
t + 4 s = time taken by sound in water
Comparing eq (1) and eq (2),because distance remains constant:
t = 1.25 s
Now using this value in eq (1):
<u>s = 1800 m = 1.8 km</u>
The ratio between initial and final speed is 3:4
Explanation:
The speed of a wave is given by the wave equation:
where
v is the speed
f is the frequency of the wave
is the wavelength
In this problem, we have a wave with wavelength and initial frequency
So its speed can be written as
Later, its frequency changes to
Assuming that its wavelength has not changed, this means that its new speed is
By calculating the ratio between the two,
So, the ratio between initial and final speed is 3:4.
Learn more about waves:
brainly.com/question/5354733
brainly.com/question/9077368
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<span>The normal force acting on the vehicle is 4440 N. Normal force is the force perpendicular to the ground. The important given values are the mass of the space vehicle (1200 kg) and the gravitational field strength (3.7 N/kg). To get a value of Force in Newtons, we just multiply the two numbers together: force = field strength * mass = 3.7 N/kg * 1200 kg = 4440 N.</span>