Which of the following is an advantage of circuit breakers over fuses.

A.) It is easier to trip a fuse.

B.) Circuits get hot.

C.) Tripped circuit breakers do not need to be replaced.

D.) Fuses need to be replaced

Answer:

amounts

Explanation:

every surface has different amounts of friction

hope this helps :) plz brainliest?

Answer:

Amounts of frictions

Explanation:

take for example a football player it is harder to push a  sled

Answer:

False

Explanation:

This depends on how much air is in the ball, I think

A sound wave when it interferes with another sound wave having the same frequency but traveling in the opposite direction produces beats.

The interference of two waves of the same frequency but travelling in opposite directions is called a standing wave. In simple terms, it is a wave pattern that is created by the superposition of two waves of equal frequency and amplitude traveling in opposite directions. The wave does not appear to move and looks as if it is stationary. However, beats are produced when two sound waves of the same frequency interfere with each other while travelling in opposite directions. A beat is a phenomenon that occurs when two sound waves interfere with each other. It is the result of the difference in the frequencies of the two waves.

When two sound waves of the same frequency interfere with each other while travelling in opposite directions, they produce beats, but when two waves of the same frequency and amplitude meet each other travelling in opposite directions, a standing wave is produced.

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The average velocity of the jet during the diversion is 518.75 m/s.

The displacement of the pilot from the starting position is calculated as follows;

d² = 20² + 60² - 2(20)(60) x cos(θ)

where;

θ = (90 - 38) + (90 - 55) = 87⁰

d² = 20² + 60² - 2(20)(60) x cos(87)

d² = 3874.39

d = 62.25 km

V = total displacement/total time

where;

V = (62.25 km)/(0.033 hr)

V = 1,867.5 km/hr = 518.75 m/s

Thus, the average velocity of the jet during the diversion is 518.75 m/s.

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(a) It can be stated that the 10-gram marble hits the ground first because it has a higher acceleration and travels faster.

(b) Both marbles will travel the same distance since their horizontal components of velocity and initial velocity with respect to the ground are the same.

According to the given statement, a 10-gram marble has a speed that is 5 times faster than that of a 100-gram marble. Both marbles roll off the table at the same time. The questions to answer are as follows:

(a) The acceleration due to gravity is constant at 9.8 m/s², according to Newton's Law of Gravitation.

According to the law of physics, heavier objects fall faster than lighter ones, but since the 10-gram marble has a speed that is five times faster than the 100-gram marble, it implies that the 10-gram marble covers more ground in less time than the 100-gram marble as acceleration is directly proportional to the force applied.

The time taken by both marbles to reach the ground is given byt = √(2h/g)where h is the height from which the marbles were dropped, and g is the acceleration due to gravity.

The height from which the marbles were dropped is the same in both cases, so it can be stated that the 10-gram marble hits the ground first because it has a higher acceleration and travels faster.

(b) The range traveled by both marbles is determined by the horizontal component of their velocity. It's worth noting that the horizontal components of their velocities are identical since they were launched from the same height, so there's no advantage for either marble.

The range of a projectile is determined by the formula:

R = u²sin(2θ)/g where R is the range, u is the velocity of the object, θ is the angle of the initial velocity with the horizontal, and g is the acceleration due to gravity.

Since the angle of the initial velocity with the horizontal is the same for both marbles, and their initial velocity is also the same, it can be stated that both marbles travel the same distance.

Therefore, both marbles will travel the same distance since their horizontal components of velocity and initial velocity with respect to the ground are the same.

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The light molecules will have the greater speed, as their mass is much lower than that of the massive molecules. This means that they will have a higher kinetic energy per unit mass, which leads to a higher speed.

The speed of a molecule is determined by its kinetic energy, which is a measure of the energy of its motion. The kinetic energy of a molecule is proportional to its mass and the square of its velocity. Since the average kinetic energy (KE) of the two types of molecules in the mixture is the same, the lighter molecules will have a higher velocity than the massive molecules.

This is because they have less mass and the same amount of kinetic energy, so their velocity is higher in order to compensate for the lower mass. This means that the light molecules will have a greater speed than the massive molecules in the mixture.

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The voltage across the tracks is 0.43 V (rounded to two significant figures).

input power = output power (assuming 100% efficiency)

The input power is the product of the input voltage and current:

input power = 120 V x 0.28 A = 33.6 W

The output power is the product of the voltage across the tracks and the current supplied to the train:

output power = V x 79 A

Setting the input power equal to the output power, we get:

33.6 W = V x 79 A

Solving for V, we get:

V = 0.426 V

Voltage, also known as electric potential difference, is a physical quantity used to measure the electric potential energy per unit charge in an electrical circuit. It is a measure of the work required to move an electric charge from one point to another in an electric field. The unit of voltage is the volt, which is defined as one joule per coulomb.

In practical terms, voltage is the force that drives an electric current through a circuit. When a voltage is applied across a conductor, it causes a flow of electric charge, which is the electric current. The voltage can be thought of as the pressure that pushes the charge through the circuit. Voltage is an essential concept in many fields of physics, including electronics, electromagnetism, and electrochemistry.

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Answer:

It's B

Explanation:

Have a good day

The planets are placed at the same distance from each other, therefore the correct answer is option B.

It is a system that collection of all the planets and spatial bodies revolving around the sun because of the gravitational pull of the sun.

Our Solar System is based on a heliocentric model in which the Sun is assumed to reside at the central point of the planetary system.

The main problem with this model, if it were going to be used to study the dimensions of the solar system is that the planets are placed at the same distance from each other, but in our solar system all the revolving planets are at variable distances from the Sun and not equidistant from each other as shown in the figure.

Thus, the correct answer is option B.

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Answer:

These are called kinematics equations.

Explanation:

These equations are used when there is either a constant velocity motion or a constant acceleration motion.

Answer:

1 Ba + 1 SO4^-2 -----> 1 Ba^2 SO4^-2

Explanation:

Answer: B

Explanation: it is perpendicular to a surface

Answer:

it is perpendicular to a surface

Explanation:

Answer:

1.4765 Hz

Explanation:

right on acellus

The frequency of an event is the inverse of time period.The frequency of the kid on bouncing the pogo stick is 1.47 Hz.

Frequency of an event is is the number of occurance of that event in unit time. It is the inverse of time period of that event. Hence frequency has the unit of s⁻¹ which is equivalent to Hz.

The frequency of a wave is the number of wave cycles per unit time. Frequency is directly related to the energy of the vibration or wave. Hence, as the frequency increases, energy increases.

Given that, the number of oscillations from the bouncing of the pogo stick is 22 times in 14.9 seconds. Thus , number of oscillations in 1 second is:

22 /14.9 s = 1.47 Hz.

Therefore, the frequency of the event created by the kid is 1.47 Hz.

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Answer:

:Meterology, Seismology,

The magnitude of the vector with components -14.0 units in the x-direction and 5 units in the y-direction can be calculated using the Pythagorean theorem.

The magnitude of a vector represents its length or size. In the xy plane, the magnitude of a vector with components in the x-direction (horizontal) and y-direction (vertical) can be found using the Pythagorean theorem. The theorem states that the square of the magnitude of a vector is equal to the sum of the squares of its components.

For the given vector with components -14.0 units in the x-direction and 5 units in the y-direction, we can calculate its magnitude as follows:

Magnitude = sqrt(\(14^{2} } +5^{2}\))

Magnitude = sqrt(196 + 25)

Magnitude = sqrt(221)

Magnitude ≈ 14.87 units

Therefore, the magnitude of the vector is approximately 14.87 units. This represents the length or size of the vector in the xy plane, taking into account its components in the x and y directions.

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The full three-dimensional strain tensor at the point

\(p = e_1 + 2e_2 + 10e_3\: is\: :\\epsilon =\left[\begin{array}{ccc}0.05x_2&0.05x_1&0\\0.05&0&0\\0&0&0\end{array}\right]\)

To calculate the full three-dimensional strain at the point \(p = e_1 + 2e_2 + 10e_3\), we need to find the components of the strain tensor \(\epsilon_m_n\).

The strain tensor εₘₙ can be calculated using the formula:

εₘₙ = (0.5) * (∂uₘ/∂xₙ + ∂uₙ/∂xₘ)

Given the displacement field u(x, t) with components:

u₁ = 0.1x₁x₂

u₂ = 0.1x₂ + 5

u₃ = 500

We can calculate the components of the strain tensor as follows:

\(\epsilon_1_1 = (1/2) * (\delta u_1/\delta x_1 + \delta u_1/\delta x_1)\\= (1/2) * (0.1x_2 + 0)\\= 0.05x_2\)

\(\epsilon_1_2 = (1/2) * (\delta u_1/\delta x_2 + \delta u_2/\delta x_1)\\= 0.05x_1\)

\(\epsilon _1_3 = (1/2) * (\delta u_1/∂x_3 + \delta u_3/\delta x_1)\\= (1/2) * (0 + 0)\\= 0\)

\(\epsilon_2_1 = (1/2) * (\delta u_2/\delta x_1 + \delta u_1/\delta x_2)\\= (1/2) * (0 + 0.1)\\= 0.05\)

ε₂₃ = (1/2) * (∂u₂/∂x₃ + ∂u₃/∂x₂)

= (1/2) * (0 + 0)

= 0

ε₃₁ = (1/2) * (∂u₃/∂x₁ + ∂u₁/∂x₃)

= (1/2) * (0 + 0)

= 0

ε₃₂ = (1/2) * (∂u₃/∂x₂ + ∂u₂/∂x₃)

= (1/2) * (0 + 0)

= 0

ε₃₃ = (1/2) * (∂u₃/∂x₃ + ∂u₃/∂x₃)

= (1/2) * (0 + 0)

= 0

Therefore, the full three-dimensional strain tensor at the point

\(p = e_1 + 2e_2 + 10e_3\: is\: :\\epsilon =\left[\begin{array}{ccc}0.05x_2&0.05x_1&0\\0.05&0&0\\0&0&0\end{array}\right]\)

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Convection differs from radiation in the sense that in radiation, matter is not involved. Option D.

The term heat transfer has to do with the movement of heat from one point another. Recall that heat transfer is one of the things that does occur in nature. There are three kinds of heat transfer that occur in nature and these are;

Let us recall that in the process of convection, there is the movement of heat from one point to the other via the actual movement of the particles of the substance.  On the other hand, radiation occur when heat is transferred without an movement or contact between the objects  between which the heat is transferred. Thus, when air masses are moving, it is a process of convection taking place.

Hence, the difference between conduction and radiation is that matter is involved in convection but not in radiation.

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

From the question

mass = 35 kg

acceleration = 20 m/s²

We have

force = 35 × 20

We have the final answer as

Hope this helps you

The gas law that describes the pressure changes that occur during pulmonary ventilation is Boyle's law. Boyle's law states that, at a constant temperature, the pressure of a gas is inversely proportional to its volume.

During pulmonary ventilation, the process of breathing, the volume of the thoracic cavity changes, leading to pressure changes in the lungs. When the diaphragm and intercostal muscles contract, the thoracic cavity expands, increasing its volume.

As a result, the pressure inside the lungs decreases, creating a pressure gradient between the lungs and the external environment. Air flows from an area of higher pressure (outside the body) to an area of lower pressure (inside the lungs), allowing for inhalation.

Conversely, during exhalation, the diaphragm and intercostal muscles relax, causing the thoracic cavity to decrease in volume. This results in an increase in pressure inside the lungs, causing air to flow out of the lungs and back into the external environment.

Boyle's law helps explain the relationship between volume and pressure changes that occur during pulmonary ventilation, enabling the process of inhalation and exhalation.

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If you keep them exactly the same distance apart, then wrapping the soccer ball in layers of duct tap will increase he gravitational force between them, because the mass of the soccer ball will increase slightly.

The gravitational force between the baseball and a soccer ball will increase by wrapping the soccer ball in layers of duct tap.

The given problem is based on the concept and fundamentals of gravitational force. The force come into play between the objects on Earth and Earth itself on account of gravity, is known as the gravitational force.

Now considering the given problem, the mathematical expression for the gravitational force is,

\(F = \dfrac{G \times m \times M}{r^{2}}\)

Here,

G is the universal gravitational constant.

m is the mass of baseball.

M is the mass of Soccer ball.

r is the distance between the baseball and Soccer ball.

Clearly, the gravitational force is directly proportional to the masses of Baseball and soccer ball and inversely proportional to the square of distance between them.

So, in order to increase the gravitational force, we need to bring both the balls closer because the masses of each balls remains constant. And this is achieved by wrapping the soccer ball in layers of duct tap.

Thus, we can conclude that the gravitational force between the baseball and a soccer ball will increase by wrapping the soccer ball in layers of duct tap.

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c it hink this because im geuss

Answer:

Non-examples of conduction include convection, radiation, and deformation. Convection is the transfer of heat through the movement of a liquid or gas, whereas radiation is the transfer of energy through electromagnetic waves. Deformation is a change in shape due to force.

Answer:  some examples of non-conductive materials include paper, glass, rubber, porcelain, ceramic and plastic.

Explanation:

ANSWER:

1. C. Wave X and Wave Y share the same speed.

2. D. The speed of a wave is affected by the properties of the medium it is traveling through, not amplitude.

STEP-BY-STEP EXPLANATION:

The amplitude of a wave does not affect the speed at which the wave travels. Both wave A and wave B travel at the same speed. The speed of a wave is only altered by alterations in the properties of the medium through which it travels.

Therefore, in the first art the correct answer is C. Wave X and Wave Y share the same speed.

If the medium is uniform (does not change), the speed of the wave will be constant.

Therefore, the correct answer is: D. The speed of a wave is affected by the properties of the medium it is traveling through, not amplitude.

Answer:

Final velocity= 84 m/s

Explanation:

V final= V initial + a * t

Vf = 0+ 12 (7)

Vf= 84 m/s

We need to use two rays, such as one that is parallel to the principal axis and one that passes through the focal point, to locate the virtual image in a planar mirror or due to reflection at a flat surface.

To find a virtual image in a planar mirror or due to reflection at a flat surface, one needs to use at least two rays. The image is located where the light rays intersect.

Virtual imageVirtual images are images that are not real; instead, they are created by our eyes when light rays appear to come from a point behind a surface. Virtual images are formed when light rays appear to diverge from a point behind a mirror or lens, rather than converging to that point. If we hold a piece of paper against a mirror and move it around, we'll notice that we can see the image in various locations behind the mirror. As a result, virtual images have no physical existence and cannot be projected onto a screen.

For finding the virtual image in a planar mirror or due to reflection at a flat surface, one needs to use at least two rays. One of the most important concepts in geometric optics is that when light strikes a surface, it is reflected, refracted, or absorbed. Because of the law of reflection, it is simple to determine the location of the virtual image of an object reflected by a flat surface. We need to use two rays, such as one that is parallel to the principal axis and one that passes through the focal point, to locate the virtual image in a planar mirror or due to reflection at a flat surface.

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Answer:

(i) It will take longer (75/22 times) the time to boil a given quantity of water compared to when the current is working at its rated capacity

(ii) The reasons are;

(1) For economy; most of the appliances in the home only require low power circuitry with thinner wire while a separate high power circuitry is created directly from the main supply for the high electric power rated appliances

(2) For safety; to prevent the over heating of the electric circuits when an high electric power appliance needs to be connected an high power electric power outlet has to be specified

Explanation:

(i) The power rating of the kettle = 3 kW

The voltage rating of the circuit, V = 220 V

The current rating, I = 4 A

The formula for electric power = I² × R = I × V

Therefore, we have;

Power produced = 220 V × 4 A = 880 V·A = 800 W

Hence, since the power produced is below the power rating of the electric kettle, it will take a longer time to boil a given amount of water than specified by the kettle manufacturer

The energy supplied H = V×I×t

Where:

t = Time in seconds

Therefore, we have;

3 kW = 3000 W;

3000 × t₁ = 880 × t₂

t₂/t₁ =3000/880 = 75/22

Hence the kettle will take 75/22 multiplied by the time it takes when working at rating capacity to boil a given quantity of water

(ii) This is so because the power consumption already factored in the electrical installation as well as the type of appliances utilized in the home allow for several low power rating consumption and few high power rating consumption

Therefore, for both economy and safety the electrical circuit are split to allow for the use of very thick copper or aluminium electric cables in the high power rating electric circuits to which can be plugged high electric power consuming devices such as the water heater and electric cooker

The low electric power consuming devices, such as the electric bulb and fans are connected to the low or "regular" power rating electric circuit outlets

The current required for high power and low power appliances is different and also the fuse rating required for both the appliances different, so two separate circuits are used for high power and low power appliances.

0.1M HCl will have a lower pH (be more acidic) than 0.1M H2SO4.

The pH of a solution is determined by the concentration of hydrogen ions (H+). In the case of hydrochloric acid (HCl) and sulfuric acid (H2SO4), both are strong acids that dissociate completely in water. However, sulfuric acid (H2SO4) dissociates into two H+ ions per molecule, while hydrochloric acid (HCl) dissociates into only one H+ ion per molecule.

Therefore, for the same concentration (0.1M), H2SO4 will produce twice as many H+ ions as HCl, resulting in a higher concentration of H+ ions and a lower pH. Hence, 0.1M HCl will have a lower pH and be more acidic than 0.1M H2SO4.

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Answer:

D.

Explanation:

Force and distance are inversely related, so a greater distance results in a weaker force.

The spatial separation between the 2 events is 13.416 × 10⁸ m

In space time-interval, the invariance of line element explains that if there are two inertial reference frames S and S', the spatial separation is invariant in all inference frames.

i.e.

\(\mathbf{\Big [ [\Delta x]^2 -[c^2 \Delta t ^2] \Big]_{frame \ 1} = \Big [[\Delta x]^2 -[c^2 \Delta t ^2] \Big]_{frame\ 2} }\)

\(\mathbf{[\Delta x_1]^2 -[c^2 \Delta t_1 ^2] = [\Delta x_2]^2 -[c^2 \Delta t_2 ^2] }\)

where;

\(\mathbf{[0]^2 -[c^2 (4) ^2] = [\Delta x_2]^2 -[c^2 (6) ^2] }\)

\(\mathbf{ [\Delta x_2]^2 =36(c^2) - 16(c^2)]}\)

\(\mathbf{ [\Delta x_2]^2 =20(c^2)}\)

\(\mathbf{ \Delta x_2 = \sqrt{20} \ c}\)

here;

\(\mathbf{ \Delta x_2 = \sqrt{20} \times 3 \times 10^8}\)

\(\mathbf{ \Delta x_2 =13.416 \times 10^8 \ m}\)

Therefore, we can conclude that the spatial separation between the 2 events is 13.416 × 10⁸ m

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