There is more than one answer

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.

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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

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:

15.0m

Explanation:

10.0+5.0

=15.0m

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:

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:

here is the answer its a picture

Explanation:

Answer:

1923 N

Explanation:

From the question given above, the following data were obtained:

Mass (m) = 65 Kg

Radius (r) = 2.5 m

Velocity (v) = 8.6 m/s

Centripetal force (F) =?

The centripetal force, F, can be obtained by using the following formula:

F = mv²/r

F = 65 × 8.6² / 2.5

F = 65 × 73.96 / 2.5

F = 4807.4 / 2.5

F = 1922.96 ≈ 1923 N

Thus, the magnitude of the centripetal's force acting on the student is approximately 1923 N

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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Answer:

Calculating the magnitude of a vector is only the beginning. The magnitude function opens the door to many possibilities, the first of which is normalization. Normalizing refers to the process of making something “standard” or, well, “normal.” In the case of vectors, let’s assume for the moment that a standard vector has a length of 1. To normalize a vector, therefore, is to take a vector of any length and, keeping it pointing in the same direction, change its length to 1, turning it into what is called a unit vector.To normalize a vector, simply divide each component by its magnitude. This is pretty intuitive. Say a vector is of length 5. Well, 5 divided by 5 is 1. So, looking at our right triangle, we then need to scale the hypotenuse down by dividing by 5. In that process the sides shrink, divided by 5 as well.

I hope this is helpful, Have a Great Day!!

Given:

Mass of the runner (m) = 50 kg

Speed of the runner (v) = 2 m/s

Equation:

[tex] \rm KE = \dfrac{1}{2} mv^2[/tex]

Answer:

By substituting values in the equation, we get:

[tex] \rm KE = \dfrac{1}{2} \times 50 \times 2^2 \\ \\ \rm = \dfrac{1}{2} \times 50 \times 4 \\ \\ \rm = 25 \times 4 \\ \\ \rm = 100 \: J[/tex]

[tex] \therefore [/tex] Kinetic energy of the runner = 100 J

Answer:

Given,

mass(m)=50kg

velocity(v)=2m/s

kinetic energy(K.E.)=?

We know that K.E.=1/2mv2

KE=1/2×50×2^2

Explanation:

=1/2×200

=100 Joule

Answer:

change in shape

hope this will help you

Answer:

about 186,000 miles per second

Explanation:

so your closest bet is probably 175 miles per second

Answer:

Correct answer is 90,000 miles PER SECOND

Explanation:

Answer:

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

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[tex]\longrightarrow[/tex] The rate of change of velocity per unit time is called acceleration.

[tex]\longrightarrow[/tex] Its SI unit is m/s².

[tex]\huge\boxed{\fcolorbox{blue}{red}{Thank you}} [/tex]

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.

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:

The answer is numberline, D

Explanation:

I got it right on edge

Answer:

A

Explanation:

Scale

Got it right on Edge:)

Explaining the concept:

Reaction force is the equal and opposite force applied by an object after we apply some force to it

This is explained in the Newton's Third Law of Motion, which says: "For every action, there is an equal and opposite reaction"

This means that any force we apply on an object, it applies the same force on us

Reaction Force exerted by the ball:

We now know what a reaction force is. Now looking at the scenario, we can see that the player applied a force of 1000N on the ball using his bat

The ball will also apply an equal and opposite force on the Bat,

So, the ball will apply a force of 1000N on the Bat

Therefore, Option C is correct

Answer: B

Explanation:

Answer: The answer is false.

Answer:  B    | The rain falls mostly as snow during the winter.

Answer:

Explanation:

Given data

Density of concrete  ρ_c=2200kg/m3

Mass of concrete m_c= 25kg

In water

[tex]F_{P2} + F_{app}-m_{cg}=0[/tex]

[tex]F_{app}=m_{cg}-F_{P2}[/tex]

Max Fapp = 25*g

Buoyancy force

[tex]F_{P2} = \rho WgV_c= \rho Wg\frac{\rho_c}{m_c}\\\\F_{ p2}= \rho Wg\frac{\rho_c}{m_c}[/tex]

[tex]25*g=m_cg- \rho W g\frac{mW}{\rho_c}= m_cg(1- \frac{\rho W}{\rho_c} )[/tex]

[tex]m_c=25( \frac{\rho_c}{\rho_c- \rho W} )[/tex]

substitute

[tex]m_c=25( \frac{2200}{2200- 1000} )\\\\m_c=25*1.833\\\\m_c=45.8[/tex]

=46kg approx.

Answer:

Bacteria

Explanation:

Answer:

The answer is bacteria.

Explanation:

Bacteria were the first known multi-celled organism on Earth.

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.