The diagram shows the top view of a 65-kg student at point A on an amusement park ride. The ride spins the student in a horizontal circle with a radius of 2.5 m, at a constant speed of 8.6 m/s. The floor is lowered and the student remains against the wall without falling to the floor.

The magnitude of the centripetal force acting on the student at point A is approximately

Question 4 options:

1398 N

47 N

223 N

1923 N

The diagrams the question refers to is in the attachment.

Answer: Third diagram or alternative C.

Explanation: In physics, vector is a representation of magnitude and direction.

Kinetic Energy is energy made by a moving object, i.e., when an object with mass has velocity, it also has Kinetic Energy. It's calculated as:

[tex]K=\frac{1}{2}mv^{2}[/tex]

Vectors below are representing change in velocity during intervals of time.

In the first diagram, vectors doesn't change, so velocity and kinetic energy are constant.

At the second, velocity still constant, however, the "intensity" of the arrow is weaker than the first, which means velocity is less than the first diagram and so is its kinetic energy.

In the fourth diagram, the arrows grow bigger from left to right. This means velocity increases during time. If velocity grows bigger, so does kinetic energy.

In the third diagram, the arrows decrease as it goes to the right: the block's velocity decreases during the successive intervals, which means, kinetic energy diminishes through the interval.

Thus, diagram C represents the situation in which the block loses kinetic energy.

Answer: The answer is false.

Answer:

15.0m

Explanation:

10.0+5.0

=15.0m

It is dangerous to stand close to railroad tracks when a rapidly moving commuter train passes. Explain why atmospheric pressure would push you toward the moving train. Water pressure inside a hose nozzle can be less than atmospheric pressure due to the Bernoulli effect.

Pls brainliest!? :)

Answer: B

Explanation:

Answer: Skinfold testing

Explanation:

Skinfold testing, is also referred to as calliper testing and it's used to know the body fat percentage. Skinfold testing is an inexpensive, portable, and common way to assess body fat in the fitness industry.

It is typically done with the use of caliper tapes, marker pens which makes it cheap. Skinfold testing isn't usually accurate which is as a result of human errors.

Answer:

here is the answer its a picture

Explanation:

Answer:

The value is  [tex]T = 288 \ N[/tex]

Explanation:

From the question we are told that

    The length of the guitar string considered is  [tex]L = 1.2 \ m[/tex]

     The mass is [tex]m = 0.006 \ kg[/tex]

Generally the tension is mathematically represented as

       [tex]T = 4f ^2 m* L[/tex]

Here f is the frequency of the [tex]A_2[/tex] note which is  [tex]f= 110 \ Hz[/tex]

So

     [tex]T = 4* 110 ^2 * 0.006* 1.2[/tex]

=>  [tex]T = 288 \ N[/tex]

Answer:

change in shape

hope this will help you

Answer:

This would be answer choice A

The digestive system breaks large nutrient molecules into smaller ones that are absorbed into the bloodstream. So, the correct option is A.

Metabolism is defined as the mechanism of the body by which the energy is produced from the food we eat, through some chemical reactions.

Here,

The overall proper health of the body is attained through having proper diet and regular exercise. In order to maintain the health, several physiological activities occurs in our body simultaneously.

Metabolism is one of the main physiological mechanism in our body, by which the food we eat is being converted into energy which is necessary for the growth and proper functioning of our body cells and organs.

Digestion is the important process of metabolism.

Digestion is the process by which the large, insoluble food molecules we consume, are broken down into smaller, water-soluble molecules, so that  it can be easily absorbed into the blood plasma.

The different steps of digestion are ingestion, propulsion, mechanical digestion, chemical digestion, absorption and defecation.

Hence,

The digestive system breaks large nutrient molecules into smaller ones that are absorbed into the bloodstream.

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Answer:

[tex]\theta=4.5^{\circ}[/tex]

Explanation:

Given that,

The distance between reflecting planes is 0.541 nm, d = 0.541 nm

Let the wavelength is 0.085 nm

We need to find the smallest angle, measured from these planes, at which constructive interference. Using Bragg's equation to find it as follows :

[tex]m\lambda=2d\sin\theta[/tex]

For smallest angle, m = 1

[tex]\theta=\sin^{-1}(\dfrac{m\lambda}{2d})\\\\\theta=\sin^{-1}(\dfrac{1\times 0.085\ nm }{2\times 0.541\ nm })\\\\\theta=4.5^{\circ}[/tex]

So, the smallest angle is 4.5 degrees.

Answer:

There are three ways an object can accelerate: a change in velocity, a change in direction, or a change in both velocity and direction.

Explanation:

There are three ways an object can accelerate by a change in velocity, a change in direction, or a change in both velocity and direction.

Acceleration is given by the ratio of Resultant or total force acting on any object and the its mass.

It can also be defined as the rate change of velocity with time.

acceleration a =  (Δv) / (Δt)

The change in velocity will change the acceleration. As, the acceleration is vector quantity, its direction change will also change the acceleration.

And both the change in velocity and direction will have effect on acceleration.

Learn more about acceleration.

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Hello!

Topic: Magnetic material

Why are magnetic materials attracted to magnets?

Because when you expose any magnetic material to a magnetic field, magnetc material atoms start to align their electrons, because they flow by magnetic fields.

Then the atoms reacts to the field, and try to get together to the magnetic electrons field.

Thats why magnetic materials are attracted to magnets.

Answer:

Because the different waves will feel like to bounce off to different directions, and different items will do different actions.

Car's Initial velocity (u) = 5 m/s

Car's Final velocity (v) = 0 m/s (Stop)

Acceleration of the car (a) = -1.5 m/s²

Equation used to solve this problem:

[tex] \boxed{ \bf{ {v}^{2} = {u}^{2} + 2as}}[/tex]

By substituting values in the equation, we get:

[tex] \rm \longrightarrow {0}^{2} = {5}^{2} +2 \times ( - 1.5) \times s \\ \\ \rm \longrightarrow 0 = 25 - 3s \\ \\ \rm \longrightarrow 25 - 3s = 0 \\ \\ \rm \longrightarrow 25 - 25 - 3s =0 - 25 \\ \\ \rm \longrightarrow - 3s = - 25 \\ \\ \rm \longrightarrow 3s = 25 \\ \\ \rm \longrightarrow \dfrac{3s}{3} = \dfrac{25}{3} \\ \\ \rm \longrightarrow s = 8.3 \: m[/tex]

[tex] \therefore [/tex] Displacement of the toy car (s) = 8.3 m