a cyclist does work at the rate of 360 w while riding. how much force does her foot push with when she is traveling at 6.0 m/s?

The stereo's current is roughly 2.15 A.

The resistance of the wire that makes up the toaster's heating element is roughly 8.70.

Ohm's law can be used to determine the current in the stereo:

I = V / R

where V is the potential difference, I is the current, and R is the resistance.

By entering the specified values, we obtain:

I = 140 V / 65 Ω ≈ 2.15 A

As a result, the stereo's current is roughly 2.15 A.

The following is the power equation in terms of voltage and resistance:

P = V² / R

P stands for power, V for voltage, and R for resistance.

By entering the specified values, we obtain:

1150 W = (100 V)² / R

When we rewrite the equation, we obtain:

R = (100 V)² / 1150 W ≈ 8.70 Ω

As a result, the resistance of the wire that makes up the toaster's heating element is roughly 8.70.

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If the efficiency of this power plant is 70 % of the maximum possible value, 862,920,000 J of heat must be thrown into the river.

The heat that must be dumped into the river will be calculated using the energy conservation law. The energy that goes into the power plant, minus the work done by the plant and the heat that goes into the river, is equal to the energy that is converted into electricity. Therefore, the energy conservation law is expressed as:

E in = E out or E in - E out = 0

The energy going into the power plant is 800,000 kW, and the work thrown into the river is 300 kW; therefore, the energy leaving the plant is (800,000 - 300) kW or 799,700 kW. The efficiency of the plant is 70 percent; therefore, 70 percent of the maximum energy that can be used is converted into electrical energy.

Since the maximum energy that can be used is equal to the energy going into the plant, the electrical energy produced is:

0.7 x 800,000 kW = 560,000 kW

The energy not converted into electrical energy is:

E in - 560,000 kW = 239,700 kW

To compute the heat to be thrown into the river, this amount must be converted into energy or heat:

239,700 kW x 3,600 s = 862,920,000 J

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The kinetic energy at the top of the rock trajectory is 43.57 Joules

The kinetic energy formula and the procedure we will use is:

K.E. = 1/2 m (v*cosθ)²

Where:

Information of the problem:

Applying kinetic energy formula we get:

K.E. = 1/2 m (v*cosθ)²

K.E. = 1/2 * 0.145 kg (32 m/s*cos40°)²

K.E. = 1/2 * 0.145 kg *(24.513 m/s)²

K.E. = 1/2 * 0.145 kg *600.91 m²/s²

K.E. =  87.132 kg m²/s² / 2

K.E. =  43.57 Joules

It is the energy possessed by a body due to its relative motion. It is usually expressed in Joules (J).

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2269 × 10-³ m can be written in scientific notation as follows: 2.269 × 10⁰.

Scientific notation is a method of writing, or of displaying real numbers as a decimal number between 1 and 10 followed by an integer power of 10.

It is an alternative format of such a decimal number immediately followed by E and an integer.

According to this question, 2269 × 10-³ metres is to be converted to scientific notation. We do this by shifting the decimal place backwards three times to obtain the following;

2.269 × 10⁰

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Answer:

5.1 meters

Explanation:

Terra tosses a 0.20kg volleyball up at at a speed of 10 m/s

The height can be calculated as follows

= v^2/2g

= 10^2/2×9.8

= 100/19.6

= 5.1 meters

Hence the height is 5.1 meters

Speed of spaceship = 240,000 km/s.

This is a problem involving the relativistic length contraction, where the length of an object moving at a relativistic speed appears shorter to an observer who is at rest relative to the object.

The equation for the length contraction is given by:

L = L0 / γ

where L0 is the proper length of the object (i.e., the length measured in the object's rest frame), L is the length measured by an observer in a different frame, and γ is the Lorentz factor, which depends on the relative velocity between the two frames.

In this problem, the proper length of the spaceship is L0 = 200 mm and the length measured by the observer on the space station is L = 120 mm. Therefore, we have:

L = L0 / γ

γ = L0 / L

Substituting the given values, we get:

γ = 200 mm / 120 mm = 5/3

The Lorentz factor γ is related to the relative velocity v between the spaceship and the space station by:

γ = 1 / sqrt(1 - (v/c)^2)

where c is the speed of light.

Solving for v/c, we get:

v/c = sqrt(1 - 1/γ^2) = sqrt(1 - 9/25) = 4/5

Therefore, the speed of the spaceship relative to the space station is:

v = c x (4/5) = 0.8c

where c is the speed of light and the unit of the speed is m/s.

So, the speed of the spaceship relative to the space station is 0.8 times the speed of light, or approximately 240,000 km/s.

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Answer:

Use the AU formula

Explanation:

1 astronomical unit = 149597871 kilometer

The two forces on Earth that could change the motion of an object are friction and gravity.

Friction is a force that opposes the motion of an object when it is in contact with another surface. It can cause an object to slow down or come to a stop.

Gravity is a force of attraction between two objects, and it can cause an object to accelerate toward the center of the earth or towards another massive object. The gravitational force on an object depends on its mass and the distance between it and the other object.

Speed and acceleration are not forces, but rather measures of motion. Heat and light are also not forces that can change the motion of an object, but rather forms of energy that can be transferred to an object and affect its temperature or behavior. Direction and time are not forces, but concepts related to an object's motion.

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Answer:

B

Explanation:

The maximum speed of the electrons before hitting the copper plate would be 1.5 x 10⁷ m/s.

The maximum speed of non-relativistic electrons can be calculated using the formula for the kinetic energy (K) of a particle, which is given by

K = (1/2)mv²,

where m is the mass of the electron and v is its velocity. In this case, the electrons are accelerated by a voltage of 35 kV.

To calculate the maximum speed, we can equate the electric potential energy gained by the electrons to their kinetic energy. The electric potential energy is given by the product of the charge of the electron (e) and the accelerating voltage (V), so we have

eV = (1/2)mv².

Solving for v, we find v = √((2eV)/m), where e is the elementary charge and m is the mass of the electron. Substituting the given values (e = 1.6 x 10⁻¹⁹ C, V = 35,000 V, m = 9.11 x 10⁻³¹ kg), we can calculate the maximum speed of the electrons to be approximately 1.5 x 10⁷ m/s.

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Answer:

Volumetric cylinders (would appreciate brainliest

Explanation:

Volumetric cylinders and volumetric flasks are used to measure volume of liquids contained in them. They are calibrated for volume included in them - this is indicated by the marking "IN". The liquid has accurate volume when it reaches the corresponding marking on the scale.

Answer:

Similitudes y diferencias entre los músculos de los peces y los de los animales terrestres.

Explicación:

Los músculos de los peces se diferencian del músculo de los animales terrestres porque los peces tienen músculos rojos, rosados y blancos. También tienen tejido muscular de pescado que se compone de músculo estriado al igual que el músculo de los animales terrestres. La mayor parte del tejido muscular de los peces es de color blanco, pero muchos peces también tienen una cierta cantidad de tejido oscuro de color marrón o rojizo. El músculo oscuro se encuentra justo debajo de la piel a lo largo del costado del cuerpo.

The vertical impulse by the lift force during this time is 4.15 by minutes for Newton second.

We have a demon That there is a force of 52 down cause of 15. Right? This is what we have you in the questions and acting on the bill. Be both masked by Graham of Mars five g. No. In the meantime. And travelers given that the time and develop acting on this fourth, you should humanists. But we need to find the impulse England's. They seem to not advise you actually. This is what we need to find. So we know that false change in momentum much time. So basically impulses change momentum, but you find impulses changing moment also jay so G is false in campaign so we can put forth here. The forces to do time 59 1 dime. That's Spanish for -5. This was with 15 to 10 days to four minutes, five Newton and two times three seconds Volunteers. They will get 15 into 10 days to the R -4. 15 10 by minus for Newton's second.

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Answer:

4 N

Explanation:

mass = 2 kg

acceleration = 2 m/s^2

Force = mass * acceleration

         = 2 *2

         = 4 N

(1).....opaque -object that not allow light to pass through it

we can't look through opaque objects

ex..wall

translucent... objects that all some light to pass through it

we can partially see through it

ex...coloured glass window

transparent... objects that wholly allow light to pass through it

we can clearly see through it

ex...glass of specs

(2)..the bouncing back of light from a smooth polished surface is called reflection of light

(3)/.....there must be a solid ,opaque to block light

there must be a source of light

there must be a surface to have shadow on it..

(6)...reflected images r formed by light reflection from a smooth polished surface while shadows are formed by blockage of light by an solid,opaque object...

Explanation:

we should talk here thanks

If positive charges move so that their voltage is increased, their electrostatic potential energy increases too.

This is because the increase in voltage increases the electric field, which causes the charges to move, thereby increasing their potential energy.

What is electrostatic potential energy? Electrostatic potential energy is defined as the work done in bringing a unit of positive charge from infinity to a certain point in space. It is also called the potential energy of an electrostatic field.

The potential energy is a scalar quantity that is measured in joules (J) or electron volts (eV). It is represented by the letter U in equations.

The potential energy between two point charges, q1, and q2, separated by a distance r is given by the equation:

U = k(q1q2/r)

where k is the Coulomb constant, which is equal to 8.99 x 109 Nm2/C2.

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Answer:

D. All electric field lines are parallel in a uniform electric field

The speed of sound in the steel railroad rails is approximately 6131 m/s.

The speed of sound is defined as the distance traveled by a sound wave per unit time.

In this case, the sound wave travels through the steel railroad rails for a distance of 2350 m.

The time it takes for the sound wave to travel through the rails is given as 0.383 s.

To calculate the speed of sound, we use the formula:

Speed = Distance / Time

Plugging in the given values, we have:

Speed = 2350 m / 0.383 s

Speed ≈ 6131 m/s

Therefore, the speed of sound in the steel railroad rails is approximately 6131 m/s.

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Explanation:

area=length(m) ×breadth(m) . The unit of area is expressed in terms of fundamental units m^2.thus it is derived unit

Big has no cause of action against Temper. In this scenario, while Temper may have made a verbal threat and raised his fists in a confrontational manner, there is no indication that he physically touched or harmed Big.

Assault refers to the act of intentionally causing apprehension or fear of imminent harmful or offensive contact. Battery, on the other hand, involves the intentional and harmful or offensive physical contact with another person without their consent.

In this case, Temper's actions may constitute assault due to the verbal threat and raising his fists, creating an atmosphere of fear or apprehension. However, since no physical contact or harm occurred, battery is not applicable. Therefore, the appropriate response is option d: Big has no cause of action against Temper.

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Answer: Current, resistance and voltage are the quantities which are related by Ohm's law.

Explanation:

A law which states that electric current is directly proportional to voltage and inversely proportional to resistance is called Ohm's law.

Mathematically, it is represented as follows.

\(I = \frac{V}{R}\)

where,

I = current

V = voltage

R = resistance

This means that the quantities related by Ohm's law include current, voltage and resistance.

Thus, we can conclude that current, resistance and voltage are the quantities which are related by Ohm's law.

Answer:

The answer is 1, 3, 5.

Explanation:

did it right

A helicopter is a type of aircraft which uses spinning blades ( wings) to fly .

By being wary of these factors and following the recommended guidelines, you can ensure the safe and effective use of hemoconcentrators in medical procedures.

When using hemoconcentrators, it's essential to be cautious and consider a few factors to ensure their safe and effective use. Some things to be wary of with hemoconcentrators include:
1. Compatibility: Make sure the hemoconcentrator is compatible with your specific application and equipment to avoid any malfunctions or complications during the procedure.
2. Clotting risks: Hemoconcentrators can sometimes lead to increased blood clotting risks. Ensure appropriate anticoagulation measures are in place during the procedure to minimize this risk.
3. Flow rate: Be mindful of the blood flow rate through the hemoconcentrator. Exceeding the recommended flow rate could lead to hemolysis or other complications.
4. Sterility: Maintain a sterile environment and follow proper handling procedures to prevent contamination, which could potentially lead to infection.
5. Monitoring: Closely monitor the patient's vital signs, blood pressure, and fluid balance during the procedure to promptly identify and address any adverse reactions or complications.

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Answer:

e = 0.46 m

Explanation:

From the laws of friction, frictional force, F is proportional to normal reaction, R.

F₁ = μR

where μ is coefficient of friction; R = mg and g = 9.8 ms⁻²

Also, from Hooke's law, extension, e, in an elastic spring is proportional to applied force.

F₂ = Ke

where K is force constant of the spring

Since the box is just about to move, the coefficient of friction involved is static friction.

The force on the spring equals the frictional force experienced by the box the box; F₁ = F₂

Ke = μR

e = μR/K

where μ = 0.65; R = 18 kg * 9.8 ms⁻²; K = 250 N/m

e = (0.65 * 18 * 9.8)/250

e = 0.46 m

Answer:

34º

Explanation:

The computation of the angle of refraction in the glass for this ray is shown below:

Given that

the angle of incidence of another red ray is 65º

And, n_1 = 1

n_2 = 1.62

According to shell law

n_1 sin \(\theta\)_1 = n_2 sin \(\theta\)_r

sin \(\theta\)_r = 1 sin 65÷ 1.62

= 0.559

\(\theta\)_r  = sin^-1 (0.559)

= 34º

The second allowed energy of an electron is 4 times the first allowed energy.

The first allowed energy can be calculated using the following equation:

En = n²h² / 8mL²where n is the principal quantum number, h is Planck's constant, m is the mass of the electron, and L is the length of the region of space to which the electron is confined.

The value of the first allowed energy is given by;E1 = h² / 8mL²

The value of h = 6.626 x 10^-34 J·s, and the value of m = 9.11 x 10^-31 kg.

Therefore, we have:E1 = (6.626 x 10^-34 J·s)² / 8(9.11 x 10^-31 kg)(0.300 x 10^-9 m)² = 3.69 x 10^-19 J

The second allowed energy of the electron, E2, is given by:E2 = 4E1= 4 × 3.69 x 10^-19 J= 1.48 x 10^-18 J

The answer is 1.48 x 10^-18 J.

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