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SIZIF [17.4K]
3 years ago
9

Which quantity must equal zero if a car is moving at a constant rate along a straight line?

Physics
1 answer:
Virty [35]3 years ago
3 0
B the energy of the car. Sorry if this is not right
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What is the result of seafloor spreading?
Over [174]

Answer:

Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.

Explanation:

eventually the crust cracks.

6 0
2 years ago
A sound wave travels at 379 m/sec and has a wavelength of 8 meters. Calculate its frequency and period.
olga nikolaevna [1]

\qquad\qquad\huge\underline{{\sf Answer}}

Wavelength, Wavespeed and frequency depends on each other in the following way :

\qquad \sf  \dashrightarrow \: frequency =  \dfrac{wave \:  \: velocity}{wavelength}

\qquad \sf  \dashrightarrow \: f =  \dfrac{389}{8}

\qquad \sf  \dashrightarrow \: f \approx 48.62 \:  \: hertz

And we know the Reciprocal relationship between frequency and period ~

So, let's find it's period •

\sf{\qquad \sf  \dashrightarrow \: t = \dfrac{8}{389}}

\sf{\qquad \sf  \dashrightarrow \: t \approx 0.02 sec }

6 0
2 years ago
A vibrating pendulum makes 20 complete vibrations in 12.2 seconds. Determine the vibrational period of the pendulum, along with
Hitman42 [59]

Answer:

And the same can be said of a pendulum vibrating about a fixed position or of a guitar ... along the time axis, it is possible to determine the time for one complete cycle. ... It takes 2.3 seconds to complete the first full cycle of vibration. ... Since the standard metric unit of time is the second, frequency has units of cycles/second.

Explanation:

Plz mark brainliest im only 12. and i have never been marked brainliest.

4 0
2 years ago
The unit light-year is a measure of
stiv31 [10]
A light-year is a unit of distance.

The definition of a light-year is the distance light travels in one year.
5 0
3 years ago
Read 2 more answers
Assuming the bar has no weight where does the fulcrum (the top point of the tringle) need to be positioned for the two sides to
Inessa05 [86]

Fulcrum need to be positioned balanced with weight on both the sides following law of lever.

What is the physical law of the lever?

  • It is the foundation for issues with weight and balance. According to this rule, a lever is balanced when the weight multiplied by the arm on one side of the fulcrum, which serves as the pivot point for the device, equals the weight multiplied by the arm on the opposing side.
  • The lever is balanced, in other words, when the sum of the moments about the fulcrum is zero.
  • The situation in which the positive moments (those attempting to turn the lever clockwise) equal the negative moments is known as this (those that try to rotate it counterclockwise).
  • Moving the weights closer to or away from the fulcrum, as well as raising or lowering the weights, can alter the balance point, or CG, of the lever.

Learn more about the Fulcrum with the help of the given link:

brainly.com/question/16422662

#SPJ4

3 0
1 year ago
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