What's the real power of a purely resistive circuit in which the RMS voltage measures 80 volts and the RMS current measures 5 amps?

A. 85 watts

B. 120 watts

C. 240 watts

D. 400 watts

Answer:

135.3 cm + 93.46cm

= 228.76 cm

So total length of two fish is 228.76

The molarity of the solution is 1.496 M.

To find the molarity of a solution, you need to use the formula Molarity = moles of solute / liters of solution.

First, you need to find the moles of solute (HCl gas) in the solution. You can do this by using the formula moles = mass / molar mass.

The molar mass of HCl gas is 36.5 g/mol.

So, the moles of HCl gas in the solution is:

moles = 54.7 g / 36.5 g/mol = 1.496 mol

Next, you need to find the liters of solution. The question states that there is 1L of solution, so this is already given to you.

Finally, you can plug in the values you found for moles of solute and liters of solution into the formula for molarity:

Molarity = 1.496 mol / 1 L = 1.496 M

So, the molarity of the solution is 1.496 M.

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Given that the mass of the car is m = 2000 kg and initial speed u = 20 m/s.

Here, three values of time are given.

(a) t1 = 10 s

(b) t2 = 4 s

(c) t3 = 1.2 s

In all three cases, the final velocity vis zero.

Impulse = change in momentum

= mv-mu

If the time duration is increased then force will be decreased as

Force will be lowest for 10s and greatest for 1.2 s.

The impulse will be the same for all three cases as the change in momentum is the same.

Answer:

it g hope it helps you out

Answer:59.3

Explanation:

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

A force is an effect that can alter an object's motion according to physics. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Force = mass.acceleration

582 = m*9.8

m = 59.39 Kg.

The force due to gravity or weight is 582 N. The mass of a student  is 59.39 Kg.

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The effects of labeling a child with a psychiatric disorder can vary and are complex, making it difficult to make definitive statements about the most true effect. However, it is generally recognized that labeling a child with a psychiatric disorder can have both positive and negative consequences.

Labeling a child with a psychiatric disorder can have positive effects by providing them with access to appropriate support and interventions. It can help professionals and educators better understand the child's needs and tailor their interventions accordingly. Labeling can also help reduce stigma and promote acceptance and understanding of mental health conditions.

On the other hand, labeling can also have negative effects. It may lead to self-fulfilling prophecies and reinforce negative stereotypes. It can create social and academic barriers for the child and contribute to feelings of shame, low self-esteem, and discrimination.

Additionally, misdiagnosis or overdiagnosis can occur, leading to unnecessary treatments or inappropriate expectations.

It is important to consider the individual circumstances, the accuracy of the diagnosis, and the support systems in place when assessing the effects of labeling a child with a psychiatric disorder.

A comprehensive approach that focuses on understanding and supporting the child's unique needs is crucial in mitigating potential negative consequences and maximizing positive outcomes.

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Answer:

131 N

Explanation:

F = 82.0 kg x 1.60 m/s^2 = 131.2 N

Answer:

The moment of inertia should be decreased.

Explanation:

The torque is given by

Torque = Moment of inertia x angular velocity

To keep the torque constant, the spin rate be increased when the moment of inertia decreases.  

The moment of inertia of the body are the efforts to put the object in rotation.  

The rotational kinetic energy of the airplane propeller is approximately 1.98 x 10⁶Joules

The rotational kinetic energy of the airplane propeller can be determined using the formula:

Rotational Kinetic Energy = 1/2 * Moment of Inertia * Angular Velocity²

To calculate the moment of inertia, we need to know the shape and mass distribution of the propeller. However, since the propeller is modeled as a slender rod, we can use the formula for the moment of inertia of a rod about its center:

Moment of Inertia = (1/12) * Mass * Length²

Substituting the given values, we get:

Moment of Inertia = (1/12) * 117 kg * (1.99 m)² = 47.39 kg*m²

Next, we need to convert the angular velocity from rpm to rad/s: Angular Velocity = (2600 rpm) * (2*pi/60) = 273.15 rad/s

Finally, substituting these values into the formula for rotational kinetic energy, we get:

Rotational Kinetic Energy = 1/2 * 47.39 kg*m²* (273.15 rad/s)² = 1.98 x 10⁶Joules

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Answer:

A doorknob - about 10cm for diameter and the force that causes the torque comes from the person turning the doorknob causing friction. It’s used to open and close doors.

A screwdriver- 2m for diameter and the force that causes the torque comes from the person applying pressure and causing the screwdriver to turn with friction. It’s used to screw a screw into the wall or into an object.

Car wheels- about 12inches in diameter and the force that causes the torque comes from the engine’s chemical force and friction against the road. They’re used to make a car go and stop.

Electric fan- 14 inches in diameter and the force for torque comes from the electricity circulating from the fan making it spin to provide the air coming out of the fan. They’re used to provide people with air as a cooling system.

Pizza cutter- 10cm in diameter and the force for torque comes from the pressure being applied on the handle and the friction between the pizza and the pizza cutter. They’re used to cut pizza.

According to given question the speed of the arrow as it leaves the bow is 41.32m/sec.

The definition of force in physics is: This push or draw on a massed object changes its velocity. An unseen factor is an agency that has the power to alter the resting or movement condition of a body. It has both a trajectory and a size.

There are several instances of energies in daily life, including: heft and drive (i.e. the weight of something) is force a swing applies to a ball. the pressure that a hair applies to hairs when stroking it. the pressure your foot applies to the pedal whenever you're riding your bike.

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Answer:

\(E=\dfrac{1}{2}mv^2\)

Explanation:

If m is the mass of the object and v is the velocity of the object. The kinetic energy is due to the motion of an object. It is given by the relation as follows :

\(E=\dfrac{1}{2}mv^2\)

The above formula is used to find the kinetic energy of an object.

The average rate at which the cable does work is 294,000 J/s.

The given parameters:

The average rate at which the cable does work is calculated as follows;

\(P = \frac{E}{t} \\\\P = \frac{mgh}{t} \\\\P = \frac{3000 \times 9.8 \times 200}{20} \\\\P = 294,000 \ J/s\)

Thus, the average rate at which the cable does work is 294,000 J/s.

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The gravity attraction force between the two is directly related to the product of respective weights and is inversely related to the square of their masses, according to Newton's Inverse Square Law.

A gravitational field is what?

Learn the vocabulary you need to speak with assurance. The region where gravity acts, such as the space surrounding a planet, is known as the gravitational field. Gravity and gravitational force are the same thing. The power that an item has because it is located in a position where gravity could effect it is known as gravitational potential energy.

Exists gravitation, or not?

Furthermore, although the influence of gravity is weaker as objects are moved away, its range is infinite. Sir Isaac Newton was the first to notice this force of attraction, and his discovery became known as Newton's law.

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The extra cost of fuel for driving 83 mph instead of 73 mph is $3.7671.

The speed of your automobile has a huge effect on fuel consumption. Traveling at 65 miles per hour (mph) instead of 55mph can consume almost 20% more fuel. As a general rule, for every mile per hour over 55 , you lose 2% in fuel economy.

If you take a 400-mile trip and your average speed is 83mph rather than the posted speed limit of 73mph, then the extra cost of the fuel is calculated as:

* **Fuel consumption at 83 mph:** 30 mpg * (1 - 2% * (83 - 55)) = 27.6 mpg

* **Fuel consumption at 73 mph:** 30 mpg * (1 - 2% * (73 - 55)) = 29 mpg

* **Extra fuel used:** 400 miles / 27.6 mpg - 400 miles / 29 mpg = 2.4 gallons

* **Extra cost of fuel:** $3.26/gallon * 2.4 gallons = $3.7671

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Answer:

the last one

Explanation:

its the sun when the earth turns towards the sun it gives us heat not solar radiation.

Answer:

Its An Open System

Explanation:

Answer: Open System

Explanation:

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A smooth impression tray is coated with a separating medium before the final impression material is placed in the tray.

In dentistry, an impression tray is used to take an impression of a patient's teeth and oral tissues, which is then used to create a custom dental restoration. Before placing the final impression material in the tray, a separating medium is applied to the tray's surface. This is typically a thin layer of material that acts as a barrier between the impression material and the tray to prevent the impression from sticking to the tray when it is removed from the mouth.

The separating medium may be a liquid or a paste, and it should be applied evenly and thinly to ensure an accurate impression. Without a separating medium, the impression material may distort or tear when the tray is removed, resulting in an inaccurate impression.

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A gun is fired with muzzle velocity 1099 feet per second at a target 4750 feet away. The minimum angle of elevation necessary to hit the target is approximately 15.2 degrees.

To find the minimum angle of elevation, we can use the equation for the horizontal range of a projectile. The horizontal range is the distance traveled by the bullet in the horizontal direction, which in this case is 4750 feet. The equation for the horizontal range is: R = (v^2 * sin(2θ)) / g

where R is the range, v is the muzzle velocity, θ is the angle of elevation, and g is the acceleration due to gravity.

Rearranging the equation to solve for θ, we have: θ = 0.5 * arcsin((R * g) / v^2). Plugging in the given values, we have: θ = 0.5 * arcsin((4750 * 32.2) / (1099^2))

Evaluating this expression, we find that the minimum angle of elevation necessary to hit the target is approximately 15.2 degrees. This means that the gun should be elevated at an angle of approximately 15.2 degrees above the horizontal in order to hit the target 4750 feet away.

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The induced current in loop C will be clockwise. The induced current in loop A will be counterclockwise.

Part A:
To determine the direction of the induced current in loop C, we can use Lenz's Law, which states that the direction of the induced current will be such that it opposes the change in the magnetic field. Since the current I in the long wire is steadily decreasing, the magnetic field around the wire is also decreasing. Therefore, the induced current in loop C will be in a direction that tries to maintain the original magnetic field.

In this case, the induced current in loop C will be clockwise. This is because a clockwise current in loop C will produce a magnetic field that adds to the original magnetic field created by the long wire, thus opposing the decrease in the magnetic field.

Part B:
Similarly, for loop A, we can also apply Lenz's Law. Since the current I in the long wire is steadily decreasing, the magnetic field around the wire is decreasing. The induced current in loop A will be in a direction that tries to maintain the original magnetic field.

In this case, the induced current in loop A will be counterclockwise. This is because a counterclockwise current in loop A will produce a magnetic field that adds to the original magnetic field created by the long wire, thus opposing the decrease in the magnetic field.

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Answer:

When the  water is frozen it turns to ice and the density decreases.

Explanation:

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Question: A negative 6 mC charge enters a region of 45 T magnetic field that is directed up. If the charge is moving toward the south with a speed of 400 m/s. determine the magnitude and  direction of the force

Answer:

Magitude of F = 108 N

Direction: Perpendicular to the plane containing v and B.

Explanation:

From the question,

Since the velocity of the charge(v), is parallel to the field(B).

Therefore, We apply

F = qvB..................Equation 1

Where F = Force, B = magnetic field, v = velocity, q = Charge.

Given: q = 6 mC = 0.006 C, v = 400 m/s, B = 45 T

Substitute these values into equation 1

F = 0.006×400×45

F = 108 N.

The direction of the force is always perpendicular to the plane containing v and B.

1 ft²= 0.09290304m²

so:

43560ft²= 0.09290304m²×43560

= 4,046.8564224 m²

Answer: 4046.9m² (approx.)

Explanation:

An acre is 43560 ft², but the US has two feet, the International foot, and the (old) Survey foot. Since 1983, the answer varies by state according to which foot the State has adopted for surveying. (Previously, it was always the Survey foot).

International: 43560 ft² x (0.3048 m/ft)² = 4046.856 422 m²

Survey: 43560 ft² x (1200/3937 m)² = 4046.872 610 m²

Both round to 4046.9 m² if that’s good enough, but there is a tiny difference.

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A minimum of four satellites are required for the Global Positioning System (GPS) to accurately determine a user's location.

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In music theory, the distance between two pitches or notes is referred to as (b) an interval. Intervals are measured by counting the number of letter names and the distance between them, including both the letter names and any accidentals (sharps or flats) that may be present.

Intervals can be classified based on their specific distance, such as a minor second, major third, perfect fifth, etc.

An accidental (option a) is a symbol used in musical notation to indicate a temporary alteration of a pitch. The beat (option c) refers to the rhythmic pulse or division of time in music.

The key (option d) refers to the tonal center or the group of pitches that a piece of music is based on. While all of these terms are important in music, the specific term that describes the distance between two notes or pitches is an interval.

Therefore, (b) an interval is the correct answer.

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If a string is 24 inches long and vibrates 128 times per second, 48 inches is the length of a string that vibrates 64 times per second.

The rate of vibration of a string under constant tension varies inversely with the length of the string. The length of the string is inversely proportional to the frequency of the string. The relation between the length of a vibrating string and the frequency of its vibration is described by the fundamental equation of waves for a stretched string: f = (1/2L)* √(T/μ),where f is the frequency, L is the length of the string, T is the tension, and μ is the mass per unit length of the string.

Here, we are given the length of a string and the number of vibrations it undergoes per second. We are asked to find the length of a string that undergoes a certain number of vibrations per second.

We are given that a string of length 24 inches vibrates 128 times per second.Let the length of the second string be L, which vibrates 64 times per second.

We can use the fundamental equation of waves to write:L = (1/2f)* √(T/μ)L = (1/2 * 64) * √(T/μ)L = 32 * √(T/μ)

Now we can use the relation that the rate of vibration varies inversely with the length of the string.

Hence, the product of the frequency and the length of a string is constant when the tension and mass per unit length of the string are kept constant.

Let k be the constant, then; f1L1 = f2L2f1 is the frequency of the first string, L1 is its length.f2 is the frequency of the second string, L2 is its length.

We know that f1 = 128 vibrations per second and L1 = 24 inches.

Substituting these values in the above formula:f1L1 = f2L2128 × 24 = 64 × L2L2 = (128 × 24)/64L2 = 48 inches

Therefore, the length of the second string is 48 inches.

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The current flow is the flow of electron inside the particle or wire. The current in the wire is 8.75 × \(10^{-19}\)ampere. The magnitude of the drift velocity of the electron in the wire is 1.78 m per sec.

(a) The current in the wire-

Current is the charge per unit time. thus,

\(I=\frac{420}{4800}\)

\(I= 8.75\) × \(10^{-19}\)

Thus the current in the silver wire is  ampere.

(b) The magnitude of the drift velocity of the electrons in the wire-

The area of the given wire is,

A = \(\pi\) × \(\frac{0.0026^{2} }{4}\)

A = 5.309 x \(10^{-6}\)

And the number of free electron in silver is 28(let). then,

n = 5.8 x \(10^{28}\)

Hence, use the above formula in order to find the velocity of the electron as,

v = 8.75 x \(10^{-2}\) / 5.8 x \(10^{28}\) x 1.6 x \(10^{-19}\) x 5.3 x \(10^{6}\)

v = 1.78 m/s

Current flow refers to the movement of electric charge in a circuit. Electric current is measured in units of amperes (A) and is defined as the rate at which electric charge flows through a conductor per unit time.In a circuit, current flows from the positive terminal of the voltage source (such as a battery) to the negative terminal, driven by the potential difference created by the voltage source.

The flow of current is facilitated by the movement of electrons in the circuit, as they move from a region of higher potential energy (such as the negative terminal of the battery) to a region of lower potential energy (such as the positive terminal). The amount of current flowing in a circuit is determined by the resistance of the circuit, which is a measure of how difficult it is for current to flow.

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Answer:

70 000 kg•m/s

Explanation:

You can find the momentum multiplying the velocity by the mass:

Momentum = 2000 • 35

Momentum = 70 000

Answer:

C- 96 m

Explanation:

d= st

d= 8 m/s x 12 seconds

d= 96 metres