A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling horizontally. As the drawing shows, one person hits the water 5.00 m from the end of the slide in a time of 0.270 s after leaving the slide. Ignore friction and air resistance, find the height H in the drawing.

Answer:

Crown glass

Explanation:

We can use Snell's Law to determine the material through which the light is passing.

Snell's Law states that n1 sinθ1 = n2 sinθ2, where n1 and n2 are the indices of refraction of the two materials, θ1 is the angle of incidence, and θ2 is the angle of refraction.

In this case, we know that the angle of incidence is 26.7 degrees, and the angle of refraction is 36 degrees. We also know that air has an index of refraction of approximately 1.

Using Snell's Law, we can solve for the index of refraction of the material:

1 sin 26.7 = n2 sin 36

n2 = (1 sin 26.7) / (sin 36)

n2 ≈ 1.52

The index of refraction of the material is approximately 1.52. This corresponds to the index of refraction of crown glass, which is a common optical material used in lenses and prisms. Therefore, the light is most likely passing through crown glass.

Explanation:

a boy walks at 2m/s for 30sec and run at 5m/s for 20sec. what is his average speed

Answer:

A capacitor is formed from two square plates of edge length a and separation d, with d <

Explanation:

A capacitor is formed from two square plates of edge length a and separation d, with d <

Answer:

after it has hit the ground

.........

Answer: A. after it has hit the ground

Answer:

A closed system.

Explanation:

The three major types of system are: open, closed and isolated. Open system interacts with its surroundings with respect to its particles and energy. A closed system interacts with its surroundings with respect to energy but not its particles. While an isolated system does not interact with its surroundings in any way.

Therefore, after the jar is sealed, it is an example of a closed system. This is because the emitted gas could not escape into the surroundings, but thermal energy was emitted into its surroundings after the chemical reaction has taken place.

Answer:

The initial Velocity IS 3.53 cm

Explanation:

The initial velocity is required so that the football just clears the goalpost crossbar that is 3.1 m above the ground is 13.7 m/s.

Projectile is the curved motion experienced by an object which is thrown in space.

Given an angle (θ) = 35°, acceleration due to gravity (g) = 10 m/s². u is initial velocity

The maximum height (h) is:

For the ball to reach 3.1 m above the ground:

\(3.1=\frac{u^2sin^2(35)}{2(10)} \\\\u=13.7 \ m/s\)

The initial velocity is required so that the football just clears the goalpost crossbar that is 3.1 m above the ground is 13.7 m/s.

Find out more on projectile at: https://brainly.com/question/24216590

Answer:

Answer:

What is the question on the testtt

Answer:

3566.26 Watts

Explanation:

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

Mass (m) of crate = 151 kg

Coefficient of kinetic friction (μ) = 0.399

Velocity (v) = 6.04 m/s

Power (P) =?

Next, we shall determine the normal reaction. This can be obtained as follow:

Mass (m) of crate = 151 kg

Acceleration due to gravity (g) = 9.8 m/s²

Normal reaction (R) = mg

Normal reaction (R) = 151 × 9.8

Normal reaction (R) = 1479.8 N

Next, we shall determine the force applied to move the crate. This can be obtained as follow:

Coefficient of kinetic friction (μ) = 0.399

Normal reaction (R) = 1479.8 N

Force (F) =?

F = μR

F = 0.399 × 1479.8

F = 590.44 N

Finally, we shall determine the power used to move the crate as follow:

Velocity (v) = 6.04 m/s

Force (F) applied = 590.44 N

Power (P) =?

P = F × v

P = 590.44 × 6.04

P = 3566.26 Watts

Therefore, the power used to move the crate is 3566.26 Watts.

After reaching a certain velocity and the belt continues to move at the constant velocity(to the right).

Let's select the correct free body diagram for the box.

When the belt was at rest and the belt was placed, the horizontal velocity was zero.

When the belt started moving with some acceleration, the force of friction will try moving the box to the opposite direction.

But in this case, the belt has attained a certain velocity which makes it to start moving at a constant velocity. At constant velocity acceleration iz zero.

Since it is moving at a constant velocity, the net force is zero since there is no acceleration.

Therefore, there will be no acceleration, there is zero net force.

The free body diagram will be:

Therefore, the correct free body diagram is option b.

ANSWER:

B.

(A)  The potential energy stored in the two rubber bands together will be 9.90 J. (B) the speed of the stone when it leaves the slingshot will be 10.5 m/s.

To solve this problem, we need to use the formula for potential energy stored in a spring:

U = (1/2)kx²

where U is the potential energy, k is the spring constant, and x is the displacement from the equilibrium position.

(a) To find the potential energy stored in the rubber bands, we need to first calculate the spring constant. We know that it takes a force of 15 N to stretch one rubber band by 1.0 cm, so the spring constant for one rubber band is:

k = F/x = 15 N / 0.01 m = 1500 N/m

The two rubber bands are in parallel, so the effective spring constant for both of them together is:

ktotal = 2k = 3000 N/m

To calculate the displacement of the slingshot when the stone is pulled back. The equilibrium position is where the rubber bands are unstretched, so the displacement is:

x = 0.22 m

Finally, we can calculate the potential energy stored in the rubber bands:

U = (1/2)ktotal × x² = (1/2)(3000 N/m)(0.22 m)² = 9.90 J

Therefore, the potential energy stored in the two rubber bands together is 9.90 J.

(b) To find the speed of the stone when it leaves the slingshot, we need to use the conservation of energy:

U = K

where U is the potential energy stored in the rubber bands and K is the kinetic energy of the stone when it leaves the slingshot.

The potential energy stored in the rubber bands is 9.90 J, and the kinetic energy of the stone when it leaves the slingshot is:

K = (1/2)mv²

where m is the mass of the stone and v is its velocity.

We know the mass of the stone is 47 g, which is 0.047 kg. We can solve for the velocity:

v = √(2K/m) = √(2(9.90 J)/0.047 kg) = 10.5 m/s

Therefore, the speed of the stone when it leaves the slingshot is 10.5 m/s.

To know more about potential energy

https://brainly.com/question/31657479

#SPJ1

Competition in the Los Angeles Flower District results in better quality flowers.

Competition results in better quality flowers because in the competition, best quality of flowers will be selected as a winner so the competitors produces best quality of flowers in order to claim the prize so we can conclude that Competition in the Los Angeles Flower District results in better quality flowers

Learn more about competition here: https://brainly.com/question/25605883

The true statement about the electric potential for the equipotential surface is  \(V_A = V_B = V_C\)

A surface with an equipotential potential is one where all points on the surface have the same electric potential. .

That is an equipotential surface is that surface at every point of which, the electric potential is the same.

The formula for the potential across every point on the surface is given as;

V = F/Q x R

V = ER

where;

Since the surface is equipotential with uniform electric across the surface, the electric potential at any point across the surface will be the same.

So \(V_A = V_B = V_C\)

Learn more about electric potential here: https://brainly.com/question/14306881

#SPJ1

Answer:

Please mark as brainliest!!

Explanation:

In coin card experiment smooth card is used so that the card can slide easily from glass.

Answer:

In coin card experiment smooth card is used so that the card can slide easily from glass.

I think it is "energy cannot be destroyed but it can change forms".

Answer: The answer is a because that's where it would be after it bounced

Answer:

Based on the answer choices provided, the correct answer is:

C, The higher the spring constant, the greater the elastic potential energy.

Explanation:

The spring constant is best defined as the measure of a spring's resistance to force (in regards to factors such as stretching and compression).

Thus, the higher the spring constant, the stiffer the string - this equates to greater elastic potential energy (think of stretching a rubber band or using it as a slingshot).

Hope this helps!

Answer:

C.) The higher the spring constant, the greater the elastic potential energy.

Explanation:

The magnitude of the force P provided that the stress in the part AB is two times that of BC part is 0.8 kN.

The magnitude of the force P provided that the stress in the part AB is two times that of BC part is calculated as follows;

Take moment about the joint to determine the magnitude of the force along part BC.

120 kN x 750 mm  =  F x 1000 mm

F = ( 120 kN x 750 mm ) / ( 1000 mm )

F = 90 kN

Stress is given as force divided by area. The following equation can be used to determine the magnitude of force P.

Stress in AB = 2 times stress in BC

P/A₁  = 2F/A₂

where;

A₁ =  πd²/4  =  π(50 x 10⁻³)²/4

A₁ = 1.96 x 10⁻⁵ m²

A₂ = πd²/4  =  π(75 x 10⁻³)²/4

A₂ = 4.42 x 10⁻³ m²

P/A₁ = 2F/A₂

P = (2F x A₁) / (A₂)

P = (2 x 90 kN x 1.96 x 10⁻⁵ m² ) / ( 4.42 x 10⁻³ m² )

P = (2 x 90,000 N x 1.96 x 10⁻⁵ m² ) / ( 4.42 x 10⁻³ m² )

P = 798.2 N

P = 0.798 kN

P ≈ 0.8 kN

Learn more about stress-forces here: https://brainly.com/question/929277

#SPJ1

Answer:

The Kinetic energy of Sphere is higher than the cylinder.

( KS > KC )

Explanation:

Given - A sphere with the same mass and radius as the original cylinder, but a smaller rotational inertia, is released from rest from the top of the ramp. KS and KC are the sphere's and cylinder's total kinetic energy at the bottom of the ramp, respectively.

To find - How do KS and KC compare, and why ?

Proof -

We know that,

The total energy of an object =  Potential energy +  linear kinetic energy + rotational kinetic energy.

⇒E = mgh + \(\frac{1}{2} mv^{2}\) + \(\frac{1}{2} l\omega^{2}\)  

Now,

Mass of sphere = m

Radius of sphere = r

So,

The moment of inertia of a uniform solid sphere = \(\frac{2}{5} mr^{2}\)

Also,

Mass of cylinder = m

Radius of cylinder = r

So,

The moment of inertia of a uniform solid cylinder = \(\frac{1}{2} mr^{2}\)

Now,

Total energy for the sphere , Es = mgh + \(\frac{7}{10} mv^{2}\)

Total energy for the cylinder, Ec =  mgh + \(\frac{3}{4} mv^{2}\)

As they always have the same total energy,

So, for height h of the sphere's velocity has to be higher.

Therefore,

The Kinetic energy of Sphere is higher than the cylinder.

Answer:

KS < KC

Explanation:

Answer:

3

Explanation:

When two plane mirrors are placed side by side such that they make some angle, θ, with each other, the number of images, n, of an object placed close to and in front of these mirrors is given by;

n = (360 / θ) - 1         ------------(i)

From the question;

θ = 90°            [since they stood making a right angle with each other]

Substitute this value into equation (i) as follows;

n = (360 / 90) - 1

n = 4 - 1

n = 3

Therefore, the number of images formed is 3

Answer:

The Grey Wolf will most likely kill off the other animals in the food web and throw off the pattern/cycle. Adding it back would probably be the death of many other animals.

Explanation:

Please mark brainliest

Answer:

The ball took 1.5 seconds to get to the 3rd baseman

Explanation:

Constant speed motion

If a body travels the same distance per unit of time, the body has a constant speed. The equation for the distance x is:

x=v.t

Where v is the constant speed and t is the time.

Solving for t:

\(\displaystyle t=\frac{x}{v}\)

The ball is thrown with a speed of v= 20 m/s and travels x=30 m, thus the time taken is:

\(\displaystyle t=\frac{30}{20}=1.5\)

The ball took 1.5 seconds to get to the 3rd baseman

Given:

Current = 9.3 x 10⁻³ A

Electric Charge = 12 C.

Let's find how long it will take for the current to transfer the electric charge.

To find the time, t, apply the formula:

Where:

Q is the electric charge = 12 C

I is the electric current = 9.3 x 10⁻³ A

t is the time in seconds

Let's rewrite the equation for t:

Thus, we have:

Therefore, it will take 1290.3 seconds for the current to transfer the charge.

ANSWER:

1290.3 s

We are given the following situation:

Where:

We will determine the height of the image by determining the height of the mirror. To do we use the area of the mirror. If the mirror is a square then its area is given by:

Substituting the value of the area:

Now, we take the square root to both sides:

Solving the operations:

Therefore, the height of the image is 5.9cm.

Now, we determine the magnification using the following formula:

Substituting the values in the formula we get:

The magnification is also equal to:

Now, we solve for the distance of the object. First, we multiply both sides by the distance of the object:

Now, we divide both sides by the magnification:

Now, we plug in the values:

Solving the operations:

Now, the distance from the observer to the pole is the difference between the distance of the object and the distance of the image:

Substituting we get:

Therefore, the pole is at 4955.2 cm.

Answer:

The kinetic molecular theory of matter asserts that: Matter is made up of particles that are continually moving. All particles contain energy, however the energy fluctuates depending on the temperature the sample of matter is in. This in turn decides whether the material exists in the solid, liquid, or gaseous form.

Explanation:

Hope it helps:)

The value of the angular acceleration of the rod is approximately equal to 0.0055 rad/s².

To find the angular acceleration of the rod, we need to first determine the torque acting on the rod around the nail. The torque is given by the formula:

torque = force * distance * sin(angle)

Where: 'force' is the applied force F, 'distance' is the distance between the point where the force is applied and the point around which the torque is calculated (in this case, the nail) and 'angle' is the angle between the force and the distance vector

Plugging in the values, we get:

torque = 0.545 N * 30 cm * sin(40°) = 4.14 N cm

We can then use the formula for torque to calculate the angular acceleration:

torque = moment of inertia * angular acceleration

The moment of inertia of a rod about an end is given by:

moment of inertia = mass * length² / 12

Plugging in the values, we get:

moment of inertia = 50 g * (30 cm)² / 12 = 750 g*cm^2

Solving for angular acceleration, we get:

angular acceleration = torque / moment of inertia = 4.14 N cm / 750 gcm² = 0.0055 rad/s².

Learn more Angular acceleration at:

brainly.com/question/21278452

#SPJ4

The magnitude of the electric field is \(2.67*10^6 N/C\), and its direction is westward.

To determine the magnitude and direction of the electric field at the point where the small ball is suspended, we can use the formula for the electric field:

Electric field (E) = Force (F) / Charge (q)

Given:

Charge of the ball (q) = \(-3.0*10^{(-12)} C\)

Force experienced by the ball (F) = \(8.0*10^{(-6)}\) N (eastward)

Plugging in the values into the formula:

E = F / q

E = \((8.0*10^{(-6) }N) / (-3.0*10^{(-12)} C)\)

Let's calculate the electric field:

E = -\(2.67*10^6 N/C\)

The magnitude of the electric field is\(2.67*10^6 N/C\). The negative sign indicates that the electric field is pointing in the opposite direction to the force experienced by the ball, which in this case is westward.

Therefore, the magnitude of the electric field is \(2.67*10^6 N/C\), and its direction is westward.

Know more about magnitude    here:

https://brainly.com/question/30337362

#SPJ8

Kinetic energy will be 600J. According to law of conservation energy: All the energy in a system will simply change the state, and no more nor less energy will be created or lost during the operation of the system. In this case, then all 600J of energy will be transformed during the operation of car.

kinetic energy, Chemical compounds' bonds contain energy. Chemical reactions have the potential to release chemical energy, frequently in the form of heat; these kinds of reactions are referred to as exothermic. Some of the energy from reactions that need heat input to continue may be stored as chemical energy in newly formed bonds.

To know more about energy visit:

https://brainly.com/question/17026052

#SPJ1

The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

Learn about electron here https://brainly.com/question/13998346

#SPJ1

The gravitational field strength at Pluto's surface is 5.827 x 10⁹ N/kg.

The force of gravity between the object and Pluto's surface is 5.827 x 10¹³ N.

The gravitational field strength at Pluto's surface is calculated as follows;

G_E = GM/r²

where;

G_E = (6.67 x 10⁻¹¹ x 1.2 x 10²²) / (1.172 x10)²

G_E = 5.827 x 10⁹ N/kg

The force of gravity between the object and Pluto's surface is calculated as follows;

F = GMm/r²

F = (6.67 x 10⁻¹¹ x 1.2 x 10²² x 100) /(1.172 x 10)²

F = 5.827 x 10¹³ N

Learn more about force of gravity here: https://brainly.com/question/2537310

#SPJ1