PHYSICS HIGH SCHOOL

PLEASE WILL GIVE BRAINLIEST

Answers

Answer 1

Answer:

Answer:

B im pretty sure

Explanation:

Answer 2

Answer: Pretty sure it is B

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Think about what subsequently happens to the ketchup, which is initially at rest, and use newton's first law to explain why this technique is so successful.

Answers

Newton's first law of ketchup is if the bottle of ketchup is smacked upward, the contents (the ketchup) will tend to remain in place, and it will be closer to the opening in the bottle.

Further explanation

If we are trying to get ketchup out of the bottle, the best way to do it is to turn the bottle upside down and give the bottle a upward smack which force the bottle rapidly upward.

Newton first law said that every object tries to continue in its state of rest or uniform motion unless an external force acted upon it (In an inertial frame of reference, an object either remains at rest or continues to move at a constant velocity, unless acted upon by a force). Newton first law describe the relationship between a body and the forces acting upon it, and its motion in response to those forces.

Inertia explained by Sir Isaac Newton in his first law of motion (Newton law of motion). The law states that an object at rest stays at rest and an object continues its state of motion until an external force acts on it. The examples are one's body movement to the side when a car makes a sharp turn

Learn more

Learn more about newton's first law https://brainly.in/question/4978079

Answer details

Grade: 9

Subject: physics

Chapter: newton's first law

Keywords: newton's first law

The ketchup inside the bottle is take out by shaking the bottle up and down. This process of bringing out the ketchup from the bottle make use of Newton’s Law of Inertia or the Newton’s first law.

Further Explanation:

The Newton’s first law of motion or the Newton’s law of Inertia states that a body continues to be in its state of rest or motion until and unless an external force is applied on the body that forces the body to change its state.

This law states that there needs to be a force in order to change the state of a body whether it is in motion or it is at rest.

The ketchup inside the bottle always settles down towards the bottom of the bottle. Now when it is required to take out the ketchup from the bottle, we hold the bottle upside down and shake it to bring the ketchup out of the bottle.

As the bottle is turned and shaken, the ketchup bottle suddenly comes into state of motion whereas the ketchup inside the bottle still remains in its state of rest. As the bottle goes up, the ketchup slides down to the neck of the bottle as it wants to remain in its initial position.

In this manner, when the bottle is shaken several times, the ketchup comes out of the bottle slowly. This process of taking out the ketchup from the bottle is due to the Newton’s law of Inertia.

The Newton’s first law or Law of Inertia has its several other applications in day to day life.

• The passenger tend to fall forward in a moving bus when the driver slams the brake suddenly. It happens because due to brakes, the bus comes to rest suddenly but the passenger’s body still remains in its state of motion and therefore, it tends to fall forward.

• The dust particles come out from a mattress when it is beaten up by a stick. The beating up the mattress sets up the mattress into motion but the dust particles remain in their state of rest and therefore, they fall out of the mattress.

Thus, the technique of bringing out the ketchup from the bottle by shaking it is an application of the Newton’s first law or the Newton’s Law of Inertia.

Learn More:

1. A 400N force acting on a refrigerator of mass 200kg brainly.com/question/4033012

2. A toy train rolls around a horizontal 1.0m diameter track brainly.com/question/9575487

3. A 700kg car driving at 29m/s hits a brick wall brainly.com/question/9484203

Answer Details:

Grade: High school

Subject: Physics

Chapter: Newton’s Laws of Motion

Keywords:

Ketchup, bottle, inertia, law of motion, first law, Newton’s law, Law of inertia, upside down, bring out ketchup, motion, rest, state, passenger fall forward, shake.

What are examples or centripetal acceleration?

Answers

Centripetal acceleration is necessary, and is present, whenever any object
moves in a closed path, or along any part of a circular path. Some examples
I can think of are:

-- a planet or a comet in orbit around the sun
-- a moon in orbit around a planet
-- the little ball making circles around the spinning roulette wheel
-- a stone tied to the end of a string, when you spin it around your head
-- the end of the spinning string on a weed-whacker
-- the tip of the blade of a fan or a windmill
-- any little bit of rubber on a car tire or bicycle tire, when they're moving
-- a strawberry seed spinning around the inside of the blender jar when you're
making a smoothie
-- a car driving around a curve in the road
-- you on almost any amusement park ride; whenever you're not moving in a
straight line, you're experiencing centripetal acceleration.

centripedal acceleration :

⇒ the moon in orbit around a planet (or the sun).
⇒ The Earth (or an other planet) in orbit around the sun.

A coil of insulated wire is wound many times around an iron bar. The wire is connected to a battery and a contact switch. The contact switch is alternately flipped closed and left closed, so the wire carries a current through it, and then flipped open and left open, so that the current stops. Describe what magnetic fields are created, if those magnetic fields in turn induce an emf, and whether the induced emf is in the direction of the original current or opposite to it. Justify your answer using Lenz's law and the conditions which can cause a magnetic field to induce an emf. You may draw a diagram if it helps you to visualize the apparatus.

Answers

Answer:

As per faraday's law the rate of change in magnetic flux linked with a coil will induce EMF in the coil. It is given by

$E = - (d\phi)/(dt)$

now here as we are closing the switch and then open it alternatively so it will change the value of current in the coil.

This change in current will change the magnetic flux in the coil due to which it will induce EMF in it.

Now by Lenz the the direction of induce current in the coil will always opposite to the causes due to which it is induced.

As we know that when switch is connected to flow the current the direction of induced current is in opposite to the current so that it will oppose the increasing value of current while when we open the switch the induced current is in direction of the current so that it will increase the value of decreasing current in the loop.

The induced emf is in the direction opposite to the direction of current.

What is induced emf?

Emf is the production of a potential difference in a coil as a result of changes in the magnetic flux passing through it.

When the flux coupling with a conductor or coil changes, electromotive Force, or EMF, is said to be induced.

The rate of change in magnetic flux linked to a coil will induce EMF in the coil, according to Faraday's law.

Now, when we alternately close and open the switch, the current in the coil will change.The magnetic flux in the coil will vary as a result of the change in current, resulting in EMF in the coil.

Now, according to Lenz, the direction of induce current in the coil will always be the polar opposite of the causes.

Hence the induced emf is in the direction opposite to the direction of current.

To learn more about the induced emf, refer to the link;

brainly.com/question/16764848

#SPJ2

A restoring force of magnitude F acts on a system with a displacement of magnitude x.In which of the following cases will the system undergo simple harmonic motion? A) F x
B) F
C) F sin x
D) F x2
E) F 1/x

Answers

Answer:

option A

Explanation:

given,

restoring force = F

magnitude of displacement = x

the system undergo simple harmonic motion.

simple harmonic motion follows Hooke's law

now.

$F\ \alpha \ x$

Hooke's law state that force is directly proportional to the displacement.

hence, the correct answer is option A

Coulomb's law states that the force F of attraction between two oppositely charged particles varies jointly as the magnitude of their electrical charges q1 and q2 and inversely as the square of the distance d between the particles. Find the effect on F of doubling q1 and q2 and halving the distance between them.

Answers

Answer: Force F will be one-sixteenth of the new force when the charges are doubled and distance halved

Explanation:

Let the charges be q1 and q2 and the distance between the charges be 'd'

Mathematical representation of coulombs law will be;

F1=kq1q2/d²...(1)

Where k is the electrostatic constant.

If q1 and q2 is doubled and the distance halved, we will have;

F2 = k(2q1)(2q2)/(d/2)²

F2 = 4kq1q2/(d²/4)

F2 = 16kq1q2/d²...(2)

Dividing equation 1 by 2

F1/F2 = kq1q2/d² ÷ 16kq1q2/d²

F1/F2 = kq1q2/d² × d²/16kq1q2

F1/F2 = 1/16

F1 = 1/16F2

This shows that the force F will be one-sixteenth of the new force when the charges are doubled and distance halved

In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the A. cathode.
B. grid.
C. anode.
D. deflecting plate.

Answers

In a cathode ray tube, the number of electrons that reach the fluorescent screen is controlled by the grid. The correct option among all the options given in the question is option "B".When current issupplied to the heater, it causes the cathode to emit electrons. The electronspass through opening of the grid before reaching the anode. By controlling thenumber of electrons passing through the grid, the number of electrons reachingthe anode can also be controlled.

Answer: B. GRID

Explanation: I JUST TOOK THE PF EXAM AND GOT IT CORRECT!!!!

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Predict how heat would flow if beaker A is moved so that it's touching beaker B A. Heat would flow from beaker B to beaker A. B. No heat flow would take place between the beakers. C. Heat would flow from both beakers. D. Heat would flow from beaker A to beaker B.

Matter is the ability to cause change.