Jeremy increases the angular speed of the yoyo such that the angle decreases to one half of its previous value. calculate the new angular velocity, in radians per second, of the yoyo.

Answer:

15000000 m

Explanation:

From the question,

Speed (S) = Distance(d)/Time(t)

S = d/t....................... Equation 1

Make d the subject of the equation

d = St..................... Equation 2

Given: S = 50 km/s = 50000 m/s, t = 5 minutes = 5*60 seconds = 300 seconds

Substitute these values into equation 2

d = 50000(300)

d = 15000000 m

Hence the skier travels 15000000 m

Answer:

o The result of a chemical change is a different  composition; in a physical change, the composition  remains the same.

Explanation:

In a chemical change, new kinds of matter are produced although the atoms are the same.

For physical changes, no new kinds of matter formed. Only the state of substances changes.

Answer:

3.038 m/s^2

Explanation:

What we have

m = 6.0 kg

\(\mu_{k}\) = 0.20

\(\mu_{s}\) = 0.40

\(F_{applied}\) = 30 N

Since the situation is that the box has already been pushed, lets get the total net force of both components.

∑Fy = \(ma_{y}\) = 0 (bc the normal and weight cancel out each other)

∑Fx = \(F_{applied}\) - \(f_{k}\) = \(ma_{x}\) (We are going to use this equation to find acceleration)

To find the friction force

\(f_{k}\) = \(\mu_{k}\) * N

\(f_{k}\) = .20 * 6.0 kg * 9.81 m/s^2 = 11.772 N

Now we can use ∑Fx equation to actually find the acceleration of the box!

∑Fx = \(F_{applied}\) - \(f_{k}\) = \(ma_{x}\)

Plug it in

30 N - 11.772 N = 6 kg * a

Do the algebra...

a = \(\frac{30 N - 11.772 N}{6 kg}\) = 3.038 m/s^2

Option C. UP. The direction of the Lorentz force on the positively charged particle is upwards.The Lorentz force on the positively charged particle moving at speed v in a magnetic field pointing into the page away from you is directed upwards.

According to the right-hand rule, the Lorentz force experienced by a charged particle moving in a magnetic field is perpendicular to both the velocity of the particle and the magnetic field. In this case, the particle is moving to the right, and the magnetic field is pointing into the page away from you. To determine the direction of the Lorentz force, we can use the right-hand rule.

Place your right hand flat on the page with your fingers pointing in the direction of the velocity (to the right) and then curl your fingers toward the direction of the magnetic field (into the page). Your thumb will point upwards, indicating the direction of the Lorentz force.

The Lorentz force on the positively charged particle moving at speed v in a magnetic field pointing into the page away from you is directed upwards. This is determined by applying the right-hand rule, where the thumb points in the direction of the Lorentz force when the fingers represent the velocity and are curled towards the direction of the magnetic field.

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As the elevator is moved from 15th floor to the 10th floor at a constant speed. It means that the height is decreasing but the speed of the elevator is moved at a constant.

It results that the kinetic stays the same but the potential energy is decreasing.

Answer:

EK = 440 Joule

Explanation:

Known:

m = 55 kg

v = 4 m/s

Ek = ?

Equation to solve this is:

Ek = 1/2 m \(v^{2}\)

Ek = 1/2 . (55) . \((4)^{2}\)

Ek = 440 J

Explanation:

In order from highest to lowest energies the parts of electromagnetic spectrum are named as

Gamma rays,

X-rays,

ultraviolet radiation,

visible light,

infrared radiation,

and radio waves.

Microwaves are a subsections of radio waves. They are used in microwave ovens to heat the food items.

This is expected EM spectrum in field of science.

The increase in velocity of the student per second is 10 m/s^2 and her change in momentum each second is 500 kgm/s^2.

The change in velocity of a moving object is known as acceleration.

For any object falling freely under gravity, the change in velocity per second or acceleration due to gravity is a constant and is equal to 10 metres per square second (10 m/s^2).

The change in momentum of a body is given as follows:

where m is mass, v is final velocity and u is final velocity.

Mass of the student = 50 Kg

Change in momentum each second = 50 kg × 10 m/s^2 = 500 kgm/s^2

Therefore, the increase in velocity of the student per second is 10 m/s^2 and her change in momentum each second is 500 kgm/s^2.

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The bulb marked with subscript "c" will be the brightest when switch "s" is closed.

When the switch "s" is closed, the bulbs are connected in parallel. In a parallel circuit, each bulb receives the same voltage across it. Since the bulbs are identical, they have the same resistance. According to Ohm's law (V = IR), the brightness of a bulb is directly proportional to the current flowing through it.

In a parallel circuit, the current is divided among the branches based on their resistances. Since all the bulbs have the same resistance, the current is divided equally among them. However, the power dissipated by a bulb is given by P = IV, where I is the current and V is the voltage across the bulb. As the voltage across each bulb is the same, the bulb with the highest current will dissipate the most power and hence be the brightest.

Since the bulbs are identical and connected in parallel, they experience the same voltage, but bulb "c" has the least resistance. Consequently, it will allow the highest current to flow through it, making it the brightest bulb.

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The value of the constant B so that y commutes with H is given by

B = 2m/q

The Hamiltonian for a particle in a constant magnetic field is given by

H = (1/2m) (p^2 + 2qBy)

where p is the momentum operator and B is the magnetic field strength. The momentum operator in the Landau gauge is given by

p = -iħ \frac{\partial}{\partial x} + Bi

where x is the position operator. In order for y to commute with H, we need to have

[y, H] = 0

Substituting the expressions for y, p, and H into this equation, we get

[y, (1/2m) (p^2 + 2qBy)] = 0

Expanding the commutator, we get

[y, p^2] + 2qB[y, B] = 0

Since y and p are both operators, they anticommute, so [y, p^2] = 0. The commutator [y, B] is equal to iħ, so we have

0 = 2qB iħ

Solve for B to get

B = 2m/q

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Answer:A

Explanation:

In a gas-powered car, a battery A) produces chemical potential energy to run the engine.

Light waves cannot travel through solid objects. Therefore, the correct answer is option B.

Lightwaves or visible light are a part of electromagnetic waves/radiation that can be perceived by the human eye. It can travel through various types of mediums and even in a vacuum.

When light travels, it interacts with the atoms and molecules in the medium that it is going through. Because of that, light travels fastest in an empty space and travels the slowest in solid objects.

That being said, light can not travel through many kinds of solid objects. It's because solid objects tend to absorb light instead of allowing it to pass through them.

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Answer:

\(\eta_{turbine} = 0.777 = 77.7\%\)

\(\eta_{combined} = 0.728 = 72.8\%\)

Explanation:

First we calculate the power input to the turbine. The input power will be equal to the potential energy of water per unit time:

Input Power = \(P_{in} = \frac{Work}{Time} = \frac{Potential\ Energy\ of\ Water}{t} \\P_{in} = \frac{(mass)(g)(height)}{Time} = (mass flow rate)(g)(height)\\\\P_{in} = (1500\ kg/s)(9.81\ m/s^2)(70\ m)\\P_{in} = 1.03\ x\ 10^6\ W = 1030\ KW\)

Now, for turbine efficiency:

\(\eta_{turbine} = \frac{Mechanical\ Power\ Out}{P_{in}}\\\\\eta_{turbine} = \frac{800\ KW}{1030\ KW}\\\\\eta_{turbine} = 0.777 = 77.7\%\)

for generator efficiency:

\(\eta_{generator} = \frac{Power\ Generation}{Mechanical\ Power\ Out}\\\\ \eta_{generator} = \frac{750\ KW}{800\ KW}\\\\\eta_{turbine} = 0.9375 = 93.75\%\)

Now, for combined efficiency:

\(\eta_{combined} = \eta_{turbine}\ \eta_{generator}\\\\\eta_{combined} = (0.777)(0.937)\\\eta_{combined} = 0.728 = 72.8\%\)

Answer: The processes are conduction, convection and radiation.

Explanation: Unless people interfere, thermal energy — or heat — naturally flows in one direction only: from hot toward cold. Heat moves naturally by any of three means. The processes are known as conduction, convection and radiation. Sometimes more than one may occur at the same time.

True, it is possible for a fault to have a north-south (N-S) strike and an eastward dip.

Faults can have various orientations and dips depending on the tectonic forces and geological conditions in a particular region. The strike refers to the direction of the fault line on the Earth's surface, while the dip indicates the angle at which the fault plane is inclined from the horizontal. Therefore, a fault can have any combination of strike and dip, including an N-S strike and an eastward dip.

Faults are geological fractures where movement has occurred, and their orientations can vary. A fault with a north-south (N-S) strike means it extends in that direction horizontally. The dip refers to the angle of the fault plane from the horizontal. So, it is possible for a fault to have an N-S strike and an eastward dip.

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Let's see

So

\(\\ \rm\Rrightarrow Q=mc\Delta T\)

\(\\ \rm\Rrightarrow 4032=4200(8)m\)

\(\\ \rm\Rrightarrow 4032/8=4200m\)

\(\\ \rm\Rrightarrow 504=4200m\)

\(\\ \rm\Rrightarrow m=0.12kg\)

\(\\ \rm\Rrightarrow m=120g\)

Answer: 1.5 × 10^-17

Explanation:

Given the following :

Frequency(f) = 2.2 × 10^16 Hz

Planck's constant(h) = 6.63 × 10^-34

The energy of a photon 'E' is given as the product of frequency and the planck's constant

E = hf

E = (6.63 × 10^-34) × (2.2 × 10^16)

E = 6.63 × 2.2 × 10^(-34 +16)

E = 14.586 × 10^-18

E = 1.4586 × 10^-17

E = 1.5 × 10-17 (2 S. F)

Answer:

C. 1.5 × 10–16 J

Explanation:

Answer:

True

But not all engineers work the same! some dont take the same steps to there design!!

Hope this helped you luv!!!! C:

The density of water expressed in SI unit is 1000.3 kg/m³

Density is defined as the ratio of mass per unit volume.

where M is the mass of the object and V is the volume occupied by the object

As we know that 1 slug = 14.593 kg

So 1.94 slug = 1.94 × 14.593 kg

Also 1 ft³ = 0.0283 m³

On converting slug/ft³ to kg/m³

= (1.94 slug/ ft³) * (14.593/1 slug) * (1/0.0283 )

= 1000.3 kg/m³

Therefore the density in SI unit is 1000.3 kg/m³.

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This scenario is directly related to the Inertia of direction, which states that an object will stay moving in the same direction unless a force acts on it.

If you need to add more to the answer above, you can probably say something about how the sudden change in direction will cause your body to want to continue on in the direction it was originally going, so the car veering suddenly will cause you to be violently pulled in it's direction.

I like to think of it like a car crash, the reason why head-on collisions are so deadly are because the car will halt but your body will continue moving at the same speed the car was going.

That's my best guess. Hope this helps! :)

When Lorraine puts the tennis ball in the container of olive oil, it will float on the surface of the oil because the density of the tennis ball (970 kg/m³) is less than the density of the olive oil (900 kg/m³).

Density is a measure of the mass of a substance per unit volume. It is an important physical property of matter and is used to identify substances, compare the same substances in different states, and measure the concentration of substances in solutions. Density is expressed in terms of grams per cubic centimeter or pounds per cubic foot. Density is also a fundamental concept in the study of fluid mechanics, since the density of a fluid determines its pressure and its behavior when acted upon by external forces.

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.1 nano ampere

Explanation:

I= Q flow/ t in secs

I= 233/2700

I= 0.0862e/sec

I= 0.0862/6.25 * 10^8 ( ampere conversion)

I= 0.1 nano ampere .

Answer:

the gravity was pulling the cup to the front of the window even though the wind was pushing it the other way.

Explanation: the gravity must be strong

By using the Newton's first law of Motion, it can be explained why the coffee spilt all over the windshield. This is because there is gravitational force which acts upon it and it pushes the substances in the downward direction towards the Earth.

Newton's first law of Motion states that a body remains in the same state of rest or uniform motion in a straight line unless and until an external force is applied on it. This means that a body will not start moving by itself until and unless an external force acts on it.

In this case, lachance's daughter is trying to pick her coffee cup, the coffee cup at the windshield is spilt which makes it difficult for her to see. This is because, there is the gravitational force or gravity which is pulling the coffee cup to the front of the window even though the wind was pushing it in the other way.

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Answer:

B. Draw conclusions

Explanation:

The last step of the scientific method is to communicate the results. After you gathered and analyzed your data, you draw a conclusion about your hypothesis. A conclusion is a summary of what you have learned from an experiment.

Hope this helps!

Answer:

A driver breaks suddenly and the passengers are flung forward

The true statements are:Jupiter's Great Red Spot is in the southern hemisphere.The fastest wind speed recorded in our solar system is on Neptune.

Among the given statements, only two are true. Jupiter's Great Red Spot, a massive storm, is indeed located in the southern hemisphere of the planet. The Great Red Spot is a prominent feature on Jupiter, visible as a giant swirling storm system. On the other hand, the fastest wind speed recorded in our solar system, reaching speeds of up to 2,100 kilometers per hour (1,300 miles per hour), is found on Neptune.

The strong winds on Neptune contribute to its dynamic atmosphere and the formation of features like the Great Dark Spot. The remaining statements about Pluto, Saturn's moon Enceladus, and Uranus are not true according to our current understanding.

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The sprinter's velocity after the propulsive period is approximately 0.004178 m/s. The velocity of the sprinter can be determined using the impulse-momentum principle, which states that the change in momentum of an object is equal to the impulse applied to it.

In this case, the sprinter applies an impulse of 305 ns (newton-seconds) to the starting blocks. The impulse can be calculated by multiplying the force applied by the time interval over which it is applied. However, the force is not given directly in the question.

To calculate the force, we can use Newton's second law of motion, which states that the force applied to an object is equal to the mass of the object multiplied by its acceleration. In this case, the mass of the sprinter is given as 73 kg.

Since the sprinter starts from a resting position, her initial velocity is 0 m/s. We can assume that the final velocity is v m/s.

Using the impulse-momentum principle, we have:

Impulse = Change in momentum
305 ns = (final momentum - initial momentum)

The momentum of an object can be calculated by multiplying its mass by its velocity. Therefore, the initial momentum of the sprinter is 73 kg * 0 m/s = 0 kg·m/s.

Substituting the values into the equation:

305 ns = (73 kg * v) - 0 kg·m/s

Simplifying the equation:

305 ns = 73 kg * v

Now, we need to convert the time interval from nanoseconds (ns) to seconds (s). To do this, we divide the time interval by 10^9.

305 ns / 10^9 = 73 kg * v

0.305 s = 73 kg * v

Dividing both sides of the equation by 73 kg:

0.305 s / 73 kg = v

Calculating the value:

v ≈ 0.004178 m/s

Therefore, the sprinter's velocity after the propulsive period is approximately 0.004178 m/s.

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The main forces opposing glomerular filtration in the kidneys are blood colloid osmotic pressure and capsular hydrostatic pressure.

These forces act in conjunction to counterbalance the filtration process within the glomerular capillaries.

Glomerular filtration occurs in the renal corpuscles, specifically within the glomerular capillaries. During filtration, blood is pushed under pressure through the glomerular capillary walls into the Bowman's capsule, where the filtrate is collected for further processing in the nephron.

One of the forces opposing filtration is blood colloid osmotic pressure, also known as oncotic pressure. This pressure is exerted by proteins, particularly albumin, present in the blood. These proteins create an osmotic gradient that draws water back into the glomerular capillaries, opposing the movement of fluid into the Bowman's capsule. Blood colloid osmotic pressure is typically higher than the other opposing pressures.

The second force opposing glomerular filtration is capsular hydrostatic pressure. This pressure is exerted by the fluid already present in the Bowman's capsule. As fluid accumulates in the capsule, it creates a hydrostatic pressure that opposes the movement of additional fluid from the glomerular capillaries into the capsule.

While blood colloid osmotic pressure opposes filtration, capsular hydrostatic pressure promotes it. Blood hydrostatic pressure, the pressure exerted by blood within the glomerular capillaries, is the driving force for filtration and is not considered an opposing force.

In summary, the main forces opposing glomerular filtration are blood colloid osmotic pressure and capsular hydrostatic pressure. Blood colloid osmotic pressure pulls fluid back into the glomerular capillaries, while capsular hydrostatic pressure pushes fluid back into the capillaries from the Bowman's capsule. These opposing forces, along with the driving force of blood hydrostatic pressure, regulate and maintain the balance of filtration in the kidneys.

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