The speed of light is ×2.998108/ms. How long does it take light to travel 90.cm?
Set the math up. But don't do any of it. Just leave your answer as a math expression.
Also, be sure your answer includes all the correct unit symbols.

The Sun can not penetrate too far into the Earth.

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The freezing point of t-butanol is 25.50oC and Kf is 9.1oC, mass of the water in the solution is calculated as  -0.018 g.

The temperature at which liquid freezes, and thee solid and liquid phases are in equilibrium is called freezing point.

ΔTf = Kf * molality

ΔTf is the change in freezing point, Kf is  freezing point depression constant, and molality is the number of moles of solute per kilogram of solvent.

ΔTf = 24.59oC - 25.50oC = -0.91oC

Given, Kf = 9.1oC .kg/mol

molality = ΔTf / Kf = -0.91oC / 9.1oC .kg/mol = -0.1 mol/kg

moles solute = molality x mass solvent (kg) = -0.1 mol/kg x 10 g/1000 kg = -0.001 moles

mass water = moles water x molar mass water = -0.001 moles x 18.02 g/mol = -0.018 g

The mass of the water in the solution is -0.018 g, however it is a negative value which is not possible. This is likely due to experimental error or impurities in the solvent.

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Answer:

The distance at which an object with a charge of +6.53x10^-9 C can keep the cork ball in equilibrium is 2.019mm.

Explanation:

To find the distance at which an object with a charge of +6.53x10^-9 C can keep the cork ball in equilibrium, we need to use Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. The formula for Coulomb's Law is F = k*(q1*q2)/r^2, where k is the Coulomb constant, q1 and q2 are the charges, and r is the distance between them.

Since the cork ball is in equilibrium, the net force on it is zero, so the force from the +6.53x10^-9 C charge must be equal in magnitude but opposite in direction to the force from the -6.67x10^-9 C charge. Therefore, we can set up the following equation:

k*(6.53x10^-9 C*(-6.67x10^-9 C))/r^2 = 0

Solving for r, we get:

r = sqrt(k*(6.53x10^-9 C*(-6.67x10^-9 C)))

Since the Coulomb constant, k, is equal to 9x10^9 Nm^2/C^2, we can substitute that in and simplify:

r = sqrt((9x10^9 Nm^2/C^2) * (6.53x10^-9 C*(-6.67x10^-9 C)))

r = sqrt((9x10^9 Nm^2/C^2) * (6.53-6.67x10^-18 C^2))

r = sqrt((9x10^9 Nm^2/C^2) * (-44.2471x10^-18 C^2))

r = sqrt((9x10^9 Nm^2) * (-44.2471x10^-18))

r = sqrt(-4.078239x10^-8 N*m^2)

So the distance is:

r = 2.019x10^-4 m or 2.019mm

Please note that this is an approximate value and I have used the Coulomb constant, k, as 9 x 10^9 Nm²/C² which is a close approximation of the true value.

The speed of the 1.2-kilogram block after the spring is released is -3m/s. The sign indicates that this block moves left direction.

Conservation of momentum stipulates that the centre of mass's mass times velocity stay unchanged. Conserving Angular Momentum, the system's overall angular momentum is constant. The Third Law of Newton Even though all internal forces exist in pairs that operate in opposition to one another, the system can't generate any net forces.

m1 => 1.2Kg; v1 = 0m/s ; v2 = 0m/s (sincce, it initially at rest)

m2 => 1.8Kg

v2'= 2m/s

The law of conservation of momentum:

m1v1 + m2v2 => m1 v1' + m2v2'

0 => 1.2 x v1' + 1.8 x 2

v1' => -(3.6)/1.2

=> -3m/s

When the spring approaches its equilibrium length, all of the stored energy in the spring is converted to kinetic energy, and the block accelerates to its maximum speed. Since the item is at rest, Ki = 0. Since there is no friction, Wnc = 0.

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A 1.2-kilogram block and a 1.8-kilogram block are initially at rest on a frictionless, horizontal surface. when a compressed spring between the blocks is released,the 1.8-kilogram block moves to the right at 2.0 meters per second, as shown. what is the speed of the 1.2-kilogram block after the spring is released?

Because a net force is applied to the ball as it travels in a circle, the ball moves at the slowest possible speed to complete a circular path when the system is open.

The radius of rotation is constant in circular motion, a special case of curvilinear motion. There is an acceleration in this instance toward the cente of 2r. As a result, the centripetal force, which pushes in the direction of the center, is created. The centrifugal reaction is how this force is reacted to.

Circular motion is defined as the movement of a body in a circle. Circular motion involves a continuous change in the direction of motion.

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The sentences can be completed as follows: Runner A is is faster than Runner B. Runner B has a head start.

The position v/s time graph is very helpful to determine the position of an object with respect to time. The speed of the moving object can be easily calculated from the graph. If the graph is a straight line, then its slope be the speed.

In the given graph, the change in distance with change in time for runner A is greater than that of runner B. Therefore, the speed of runner A is greater than B.

The starting position of B is ahead of A and it is not from origin. . Hence, it can be said that, runner B has a head start.

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The stone takes 3 seconds to reach the floor as a result. It is crucial to verify motion equations with t = 0 in order to remember any irregularities, if any in the motion.

In physics, motion is defined as a change in a body's position or orientation over time. Translation is the term for movement across a plane or a curve. Rotation is another motion that modifies a body's orientation.

Anomalies, then, are phenomena that stick out since they appear peculiar or unexpected.

An observation that deviates from the predictions made by a well-established scientific theory Unusual observations may motivate researchers to reevaluate, revise, or develop.

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Like charges repel other like charges, and unlike charges attract, according to Coulomb's theory of the electric force for charges in a resting state.

The characteristics of the electric force for charges in a resting state, according to Coulomb, are as follows: The opposite of a charge's attraction is the opposite of its repellency. Therefore, a positive charge attracts a negative charge, whereas two negative charges repel one another.

The charge on each sphere has a magnitude of 4.33 10(-6) C.

We receive;

r = 75 cm = 0.75 m, the distance between the centres of two spheres.

The force between the charges is F = 0.3 N.

The equation for the force between charges is F = (kq1q2)/r2.

Where;

k is a constant and equals 9 10(9) N.m2/C2.

The charges are equivalent, hence q1 = q2 = q.

Thus;

F = kq²/r²

q = √(Fr²/k)

q = √(0.3 × 0.75²/(9 × 10^(9))

q = 4.33 × 10^(-6) C

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Derive an expression for the speed of the center of mass of the hoop when it reaches the bottom of the ramp.

What is meant by speed ?

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The angle of ∠JKM is 148 degrees when given that the angle J is 3 times the angle JKL and the measure of angle L is 41degrees.

Given the angle J is = 3 x ∠JKL = 3x

Let the angle K = x degrees

The angle of ∠L = 41degrees

The measure of external angle ∠JKM = 4x+9 degrees

The measure of external angle is equal to the sum of angles opposite to that angle inside a triangle.

Then ∠JKM = ∠J + ∠L

The sum of all angles in a triangle = 180 degrees

3x + x + 41 = 180

x = 34.75degrees

Thus the angle JKM and J = 34.75degrees

So, we know that 4x+9 = 4 x 34.75 + 9 = 148degrees.

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The rod's rotational inertia I about this axis is 3.1762 × 10⁻³ kg.m² while the period of time οf rod's oscillation is 0.8797s.

It turned out that different atοms and different elementary particles have different masses with theοretically the same amount of matter. Mass has many conceptually different but physically equivalent definitions in mοdern physics. Mass can be defined experimentally as a measure of a bοdy's inertia, which is its resistance to acceleration (change in velocity) when a net fοrce is applied.

Given that

Mass of the rοd is m =0.200kg

Length of the rοd (L) =330mm

=0.330m

Now the center οf mass to the hanging point is

d =[tex]\mathrm{\dfrac{330mm}{2} -82.5mm}[/tex]

=165mm-82.5mm

=82.5mm

=0.0825m

a)Now the mοment of inertia of the rod about the axis is

I = Icm+md²

I = mL²/12 + md²

= (0.200)(0.330)2/12 + (0.200)(0.0825)2

= 1.815 × 10 -3 + 1.3612 × 10⁻³

= 3.1762 × 10⁻³ kg.m²

b) Now the time periοd of the rod's oscillations is given by

T = 2π × √(I/mgd)

[tex]$ \mathrm{ =2 \times 3.14 \times \sqrt{ \frac{ 3.1762 \times 10^{-3} \ kg.m^2} { 0.200\ kg\times 9.81\times 0.0825} }}[/tex]

= 0.8797s

Thus, The rod's rotational inertia I abοut this axis is 3.1762 × 10⁻³ kg.m² while the period οf time of rod's oscillation is 0.8797s.

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Complete question:

Jack runs up the stairs, elevating his 71.7 kg body a vertical distance of 2.86 meters in a time of 2.19 seconds. The power (in Watts) done by the stairs on Jack's body is 780.5 watts.

To determine the power done by the stairs on Jack's body, we can use the formula:

= Power

= Work / Time

where Work is the amount of energy exerted on the object and Time is the duration of the work.

First, we need to calculate the work done on Jack's body by the stairs. We can use the formula:

= Work

= Force x Distance

where Force is the force exerted on the object and Distance is the distance over which the force is exerted. Since the force exerted on Jack's body is equal to his weight, which is the force of gravity acting on him, we can calculate the work done on him as follows:

= Work

= (71.7 kg) (9.8 m/s^2) (2.86 m)

Next, we can divide the work by the time to find the power:

Power = Work / Time

Power = (71.7 kg) (9.8 m/s^2) (2.86 m) / 2.19 seconds

Power = 2.86 * 9.8 * 71.7 / 2.19

Power = 1709.5 / 2.19

Power = 780.5 watts

So the power done by the stairs on Jack's body is approximately 780.5 watts.

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At a height that is two earth radii above the planet's surface, a particle of space debris is launched from rest.The weight of this trash is only one-fourth of what it would be if it were on Earth.

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The term "tolerable upper intake level" (UL) refers to the maximum daily food intake that is most likely to not put almost all members of the general population at risk for negative health impacts.

Which 4 dietary reference intakes are there?

The recommended intakes, also known as the dietary reference intakes (DRIs), also comprise the adequate intake (AI), the tolerable upper intake level (UL), and the estimated average requirement (EAR).

What are the six main dietary requirements?

These fundamental processes let us to move, expel waste, breathe, grow, and reproduce as well as sense and react to our surroundings. The body needs nutrients from six different classes in order to function and maintain general health.

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The rate at which the temperature of the chili is decreasing is given by

c(t)=[tex]22e^{-0.05t^{2} }[/tex] is 77.267⁰ F.

The rate of change of temperature, also known as the temperature gradient, is a measure of how quickly the temperature of a system is changing at a given point in space and time. It is typically measured in units of degrees Celsius per second or degrees Fahrenheit per second. The temperature gradient is a vector quantity, with the direction of the gradient pointing in the direction of the greatest temperature change. The magnitude of the gradient is a measure of how quickly the temperature is changing in that direction. The rate of change of temperature can be positive, negative, or zero. A positive rate of change of temperature means that the temperature is increasing, a negative rate of change of temperature means that the temperature is decreasing

Rate of change of temperature over 0 [tex]\leq[/tex] t [tex]\leq[/tex] 5.

[tex]\int\limits^5_0 {c(t)} \, dt = 22\int\limits^5_0 {e^{0.05t^{2} } } \, dt[/tex]

using numerical integration we get value of

[tex]\int\limits^5_0 {e^{0.05t^{2} } } \, dt=3.51211\\\int\limits^5_0 {c(t)} \, dt= 22* 3.51211=77.26657= 77.267^{0} F[/tex]

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The ball will hit the ground after 0.519469684 seconds and will hit the ground a horizontal distance of 0.573428 feet away.

Form of motion experienced by an object or particle that is projected in gravitational field, such as from Earth's surface, and moves along curved path under the action of gravity only is called projectile motion.

The time of flight can be calculated using:

t = (2vsin(θ)) / g

t is the time of flight, v is the initial velocity, θ is angle of launch (measured from the horizontal), and g is acceleration due to gravity (which is -32 ft/s^2).

So, t = (210sin(80)) / -32

t = 0.519469684 seconds

To find the horizontal distance the ball will travel before hitting the ground:

d = vxt = vcos(θ)*t

d is the horizontal distance, vx is horizontal component of velocity, and t is the time of flight.

d = 10*cos(80)*0.519469684

So, d = 0.573428 feet

So the ball will hit the ground after 0.519469684 seconds and will hit the ground a horizontal distance of 0.573428 feet away.

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Answer:

1200 kg/m³

Explanation:

This is simply 1.2g/cm³ × 1000 which further gives 1200 kg/m³

At time t = 2, the instantaneous velocity is -20 m/s.

Therefore, the average velocity at a point that is one increment smaller and one increment larger than the point can be used to estimate the instantaneous velocity at that point. Then, you can get a better estimate of the instantaneous velocity at that point by finding the average of those two average velocities.

The SI unit of measure is m/s. Because the position function is given, we can obtain the velocity by determining [tex]\dfrac{ds}{dt}[/tex], from which we can derive the instantaneous velocity.

S (2) = -5(2)2 + 409

= 389 S (2-01)

= -5(2.01)2+409

= 388-7995

Average velocity on [a, b]

Vavg (b) - (a) b-a on [1.999,2]

Vavg = S(2)-SU.999) 2-1999 389-389-019995

0.001 =-0.019995

0.001 -19.995

= -20

As t = 2, Vavg = -20,

instantaneous velocity = -20 m/s

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It is important to note that the average rate of change is a scalar quantity.

The average rate of change is a measure of how quickly an object's height is changing over a certain period of time. To calculate the average rate of change, you need to know the height of the object at two different times, t1 and t2, and the difference between those two heights (change in height) and the difference between those two times (change in time).

The formula for average rate of change is: (change in height)/(change in time).

The units for the average rate of change are determined by the units of the change in height and the change in time. Since the height is given in meters and the time is given in seconds, the units of the average rate of change would be in meters per second (m/s). This means that for every second, the object's height is changing by a certain number of meters. It' is important to note that the average rate of change is a scalar quantity, it doesn't give information about direction of motion.

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Temperature is the comparison of one thing to another to determine how hot or cold it is, whereas heat is the energy transfer between two objects.

The degree to which an object is hot or cold is measured by its temperature. A thing's temperature describes how hot or cold it is. You check your temperature to see if it is higher than usual when you suspect you might have a fever. In terms of excitement, temperature can also signify hotness or coolness. Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object. Radiation, conduction, and convection are the three mechanisms through which such energy can be transferred.

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Option A has a column that consists of three boxes. There is a left arrow in the top box of choice A, a left sign for temperature in the middle box, and a left column for temperature in the bottom box.

The temperature of an object serves as a gauge for both the average kinetic mobility of its constituent particles. As the temperature rises, so does the movement of these particles. To measure the temperature, a barometer and perhaps a chamber are employed.

What are temperatures and what is their unit?

When two things with room temperature and atmospheric pressure are kept in close proximity, the temperature depends on the angle of heat transmission. The SI unit is the kelvin (K).

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Complete question:

Potential energy is changed into kinetic energy as the skateboarder decelerates down the ramp.

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The mass of the second block is 118.6.

Explanation:

T = 33*1.5 + 33*2.1

    = 49.5 + 69.1

    = 118.6.            

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The point just above the wheel and not in direct contact with the soil has the highest velocity in respect to the ground when such wheel is spinning without slipping. magnitude

The simplest definition of magnitude in physics is "distance or quantity." In either a relative or absolute meaning, it displays the size or motion of an object. In physics, a size or a length is frequently described magnitude.

Charles F. Richter created the Richter scale, the first commonly utilized technique, in 1934. It did so by applying a formula that took into account the length between the earthquake as well as the seismometer as well as the size of the greatest wave ever recorded on a particular kind of seismometer.

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The force acting on an object is defined by Newton's second law as being equal to the object's mass (m) times its acceleration (a).

Block B's acceleration times its mass gives block A's force, which is equivalent to that force.

1. A string that travels through a massless pulley connects the two blocks, A and B.

2. There is 0.1 coefficient of friction between B and the ground, and 1 = 0.2 between A and B.

Block B experiences an acceleration of a = 0.5 m/s2 as a result of being dragged by a force.

4. The Newton's second law of motion is used to determine the string's tension.

It specifies that the sum of the forces exerted on a body must equal the mass times the acceleration of the body.

Thus, mg = 4 kg represents the string's stress.

5. To determine the value of F, we utilize the same equation but swap out block B's acceleration for block A's mass and vice versa.

This results in F = ma = 2kg x 0.5 m/s2 = 1 N.

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Using Newton's Third law both the skaters will experience equal and opposite force. And hence equal impulse i.e momentum of both the skaters will be same. and Kinetic energy of skater B is more than skaterA

[tex]P_{a} =P_{b}[/tex]

we know that

[tex]KE=\frac{P^{2} }{2m}[/tex]

As given  [tex]m_{a} > m_{b}[/tex]

[tex]K_{B} > K_{A}[/tex]

Kinetic energy of skaterB is more than skaterA

A push or a pull that an object experiences as a result of interacting with another item is known as a force. Interactions result in forces! As mentioned, action-at-a-distance interactions produce and other forces (gravitational, electrical, and magnetic forces). Newton proposed that anytime objects A and B come into contact, forces are applied to one another. When you sit in a chair, you apply a downward force to the chair, and the chair responds by applying an upward force to your body. This contact creates two forces: one force on the chair and one force on your body. The third law of motion of Newton deals with these two forces, which are referred to as action and reaction forces.

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There is a 0.6568 percent chance that a single diode's voltage will fall between 39 and 422 volts.

It is known that the breakdown voltage of a randomly selected diode of a certain type has a normal distribution with a mean of 40 volts (v) and a standard deviation of 1.5 v. 1.5) = (1.33 (0.67), which equals 0.9082 0.2514, which equals 0.6568.

The forward voltage of silicon diodes is around 0.7 volts. The forward voltage of germanium diodes is around 0.3 volts. Peak Inverse Voltage, or PIV rating, is the highest reverse-bias voltage that a diode can sustain without "breaking down."

An electrical device called a diode makes it more easier for electricity to flow through it in one direction than the other. Despite the existence of other diode technologies, semiconductor diodes are the most prevalent type of diode used in contemporary circuit design. Schematic diagrams use symbols to represent semiconductor diodes.

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F = F1 - F2 = kQq/x^2 - kQ(-q)/x^2 = 2kQ*q/x^2

The force varies as x-3, since the second term is proportional to (d/x)^2 and the third term is proportional to (d/x)^4.

The force on the charges would still be attractive, but the direction of the force would be opposite to the current one.

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