PHYSICS HIGH SCHOOL

Under what conditions might a stream's volume increase, and under what conditions might it decrease? How would the size of the sediment particles in the stream's load differ in the two situations?

Answers

Answer 1
Answer: From to differts is to

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What is the difference between the fields surrounding a stationary charge and those that surround a moving charge? A moving charge has only an electric field and a stationary charge has only a magnetic field. A moving charge has both an electric and magnetic field and a stationary charge has only an electric field. A moving charge has only a magnetic field and a stationary charge has both an electric and a magnetic field. There is no difference between the fields surrounding a stationary charge and those that surround a moving charge—both have an electric and a magnetic field.

Answers

The best statement would be the second option where a moving charge has both an electric and magnetic field and a stationary charge has only an electric field. A charged particle that is stationary produces a magnetic field but does not produce electric field. A periodically moving charge, on the other hand produces an electro-magnetic field.

The correct answer to the question is : B) A moving charge has both an electric and magnetic field, and a stationary charge has only an electric field.

EXPLANATION :

Before answering this question, first we have to understand the nature of field created by charge particles.

If the charge particle is at rest i.e stationary, then the field created by the charge particle is electric in nature. Hence, a stationary charge particle produces electric field only.

If a charge particle moves with uniform velocity, then the field will be only magnetic .Hence, a non accelerating charge particle will produce magnetic field.

If a charge particle accelerates, then the field created by the charge particle is electromagnetic in nature.

Hence, the correct answer of this question is the second statement.

In a machine shop, a hydraulic lift is used to raise heavy equipment for repairs. The system has a small piston with a cross-sectional area of 0.075 m2 and a large piston with a cross-sectional area of 0.237 m2 . An engine weighing 3400 N rests on the large piston. What force must be applied to the small piston in order to lift the engine? Answer in units of N.

Answers

Answer:

F_s=1075.9493\ N

Explanation:

Given:

  • area of piston on the smaller side of hydraulic lift, a_s=0.075\ m^2
  • area of piston on the larger side of hydraulic lift, a_l=0.237\ m^2
  • Weight of the engine on the larger side, W_l=3400\ N

Now, using Pascal's law which state that the pressure change in at any point in a confined continuum of an incompressible fluid is transmitted throughout the fluid at its each point.

P_s=P_l

(F_s)/(a_s)=(W_l)/(a_l)

(F_s)/(0.075) =(3400)/(0.237)

F_s=1075.9493\ N is the required effort force.

Answer:

   F = 1076 N

Explanation:

given,

small piston area, a = 0.075 m²

large piston area, A = 0.237 m²

weight on the large piston, W = 3400 N

force applied on the second piston, F = ?

using pascal law for the force calculation

(F)/(W)=(a)/(A)

(F)/(3400)=(0.075)/(0.237)

   F = 0.3165 x 3400

   F = 1076 N

The force applied to the small piston in order to lift the engine is equal to 1076 N.

What is big and green with horns and jumps high?

Answers

Answer:

Bullfrog

Explanation:

There is a species of frogs generally found in America known as Bullfrog. Bullfrog has horns. These types of frogs are very big and they can jump very high.

Thus, answer is Bullfrog.
the answer would be a frog!

What is the metric unit of force? kg kg/cm^3 kg/cm^2 N

Answers

force is found by multiplying mass (kg) and acceleration (m/s^2), so the metric unit of force is kg*m/s^2 or N (newtons)

The amount of work done by two boys who apply 200 n of force in an unsuccessful attempt to move a stalled car is?

Answers

             Work = (force) x (distance)

It doesn't matter if the whole football team is pushing on it.
Until the car moves, no work has been done.

When a compression wave travel through a median, which way does matter in the median move?

Answers

Matter will move upwards or outwards depending on the direction of the compression wave
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