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vodka [1.7K]
3 years ago
7

Which of the following corresponds to a supersonic speed?

Physics
2 answers:
IgorLugansk [536]3 years ago
8 0
Answer=C

Supersonic speed is a rate of travel that exceeds the speed of sound. The speed of sound is Mach 1

a. Mach 0.5

b. Mach 1

c. Mach 1.5

C is the correct answer. Mach1.5>Mach1

a is less than the speed of sound, therefore it doesn't exceed it.
Mach0.5<Mach1

b is exactly the speed of sound, so it doesn't exceed it.
Mach1=Mach1
oksian1 [2.3K]3 years ago
7 0

Answer:

The answer is MACH 1.5

Explanation:

Supersonic speed is anywhere from 1.5 Mach to 5 Mach.

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3. Sailors use a capstan (shown below) to raise and lower the anchor. It takes two sailors located 1 meter from the center to tu
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Answer:

B. 2 meters.

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therefore,  for one sailor to apply the same torque it must be that the torque \tau_2 he applies must be equal to the torque that the two sailors applied:

FD_2 =2FD

which gives

D_2 = 2D.

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3 years ago
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Read 2 more answers
A certain elastic conducting material is stretched into a circular loop of 1.6 cm radius. It is placed with its plane perpendicu
inysia [295]

Answer:

Induced emf in the loop is 0.0603 volts.

Explanation:

It is given that,

Radius of the circular loop, r = 1.6 cm = 0.016 m

Magnetic field, B = 0.8 T

When released, the radius of the loop starts to shrink at an instantaneous rate of 75.0 cm/s, \dfrac{dr}{dt}=75\ cm/s=0.75\ m/s

We need to find the magnitude of induced emf at that instant. Induced emf is given by :

\epsilon=\dfrac{-d\phi}{dt}

Where

\phi is the magnetic flux, \phi=B\times A

\epsilon=\dfrac{-d(BA)}{dt}, A is the area of cross section

\epsilon=-\dfrac{-d(B(\pi r^2))}{dt}

\epsilon=-2\pi r B(\dfrac{dr}{dt})

\epsilon=-2\pi \times 0.016\times 0.8 \times 0.75\ m/s

\epsilon=0.0603\ V

So, the induced emf in the loop is 0.0603 volts. Hence, this is the required solution.

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