PHYSICS HIGH SCHOOL

Which most likely could cause acceleration? Check all that apply.a flat road
wind
water movement
a hill
a stop light
*can be multiple answers*

Answers

Answer 1
Answer:

Answer  

Wind  

Water movement  

A hill

Explanation.  

The question does not specify it is the acceleration of what is to be accelerated. So my answer will be general. Acceleration is the change of velocity with time.  

Wind can cause acceleration of sound. If the sound is travelling in the direction of sound, its speed wound increase. The reverse is also true.  

Water movement can also cause acceleration. When a bout is moving in the direction of water movement, then it will be expected that the resultant speed of the bout to be higher. If the bout was moving against the water movement, its speed would be decreased.  

A hill would reduce the speed of a moving vehicle. This is also an acceleration that is negative (deceleration).  

A stop light and a flat road cannot cause acceleration.  

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An ultrasound wave vibrates 30,000 times per second. what is the frequency

Answers


The frequency is 30,000 per second.
That's the same thing as 30 KHz.

The AC voltage source is connected to an inductor and a resistor in series. If the frequency of the source is increased the current in the circuit will _________.

Answers

Answer:

If the frequency of the source is increased the current in the circuit will decrease.

Explanation:

The current through the circuit is given as;

I = (V)/(Z)

Where;

V is the voltage in the AC circuit

Z is the impedance

Z = √(R^2 + X_L^2)

Where;

R is the resistance

X_L is the inductive reactance

X_L = ωL = 2πfL

where;

L is the inductance

f is the frequency of the source

Finally, the current in the circuit is given as;

I = (V)/(√(R^2 + (2\pi fL)^2) )

From the equation above, an increase in frequency (f) will cause a decrease in current (I).

Therefore, If the frequency of the source is increased the current in the circuit will decrease.

Plz answer will give Brainliest answer to whoever does.

Answers

Answer:

  • A foot kicking a ball
  • A iPhone/phone being charged

Explanation:

A foot kicking a ball:

Potential energy is converted to kinetic energy.

A iPhone/Phone being charged:

Electrical energy is converted to chemical energy.

Answer:

A foot kicking ball.

An iPhone being charged

Explanation:

  • A foot kicking a ball is example of transportation of Kinetic energy

\n \sf\longmapsto K.E=(1)/(2)mv^2

  • An iPhone being charged means the electronic energy is converted into machinery energy

Please help me solve

Answers

Answer:

I think D

Explanation:

What are two main factors that affect how quickly a coastline erodes?

Answers

the hardness of the rock and the energy of the waves -- that would be the answer

sketch a velocity time graph for the motion of the body . from the graph explain each step, calculate the total distance covered by the body

Answers

Answer: please find the attached file for the solution.

Explanation:

In a velocity time graph for the motion of the body, the total distance covered by the body is area under the graph.

Please find the attached file for the solution.

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