HELP HELP HELP HELP ME PLEASE HURRY

Explanation:

(1) Every object moves in a straight line unless acted upon by a force. (2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object's mass. (3) For every action, there is an equal and opposite reaction.

The average voltage induced in the coil is 6.25 V.

The voltage induced in a coil is given by the formula V = NAB/t, where N is the number of turns of wire, A is the area of the coil, B is the magnetic field strength, and t is the time interval over which the field changes. In this case, N = 2 500, A = (2.0 cm)^2 = 4.0 cm^2 = 4.0 x 10^-4 m^2, B = 0.25 T, and t = 1.0 s.

Substituting these values into the formula gives V = (2 500)(4.0 x 10^-4)(0.25)/1.0 = 6.25 V.

The average voltage induced in the square coil, with sides 2.0 cm long and wrapped with 2 500 turns of wire, by a uniform magnetic field perpendicular to its plane that increases to 0.25 T during an interval of 1.0 s, is 6.25 V.

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Answer:

ohohoh

Explanation:

c

Answer:

False

Explanation:

I'm not the most sure but it seems reasonable that it's false

Good Luck Bestie :3

Answer:

The answer is false. If you want why. I will desxribe you.

Answer:

I am pretty sure it is A!

:D

The air is warmer near Earth's surface because warm air is denser and sits on top of the Earth's surface. The correct option is B.

The mass of the air per unit volume is known as the air density. Its unit is kg/m³.

Due to the lower pressures in the air above, air expands when it rises. cooling air expands.

The hottest temperatures in the troposphere are often found at the earth's surface because the sun heats the atmosphere predominantly from the surface and because the air cools as it ascends.

Because warm air is denser and lies on top of the surface of the Earth, it is warmer near the surface of the earth.

Hence, the correct option is B.

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Firing photons at the surface of a metal is analogous to rolling different types of balls at a set of bowling pins because both processes involve transferring energy from one object to another.

When photons are fired at the surface of a metal, they transfer energy to the electrons within the metal. This causes the electrons to move around, creating a flow of electrical current. Similarly, when a ball is rolled towards a set of bowling pins, it transfers kinetic energy to the pins, causing them to move and potentially fall over.

Additionally, just as different types of balls can have varying sizes, weights, and shapes, photons can have different frequencies and energies. The energy of a photon determines how much energy it can transfer to the metal surface, just as the weight of a ball determines how much force it can exert on the bowling pins.

It is important to note that firing photons at a metal surface is a much more precise and controlled process than rolling balls at bowling pins. Scientists use specialized equipment to carefully aim the photons at specific locations on the metal surface, and they can control the frequency and intensity of the photons to achieve desired results. Rolling balls at bowling pins, on the other hand, is a more random and chaotic process that relies on the skill and accuracy of the person throwing the ball.

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Answer:

B

Explanation:

You need a specific force to change the momentum of something.

Hope this helps!

The conversion factor that is a measured number is 12 eggs/dozen.

In this question, we are given a list of conversion factors and we need to identify the one that is a measured number. Let's analyze each option:

Therefore, the conversion factor that is a measured number is 12 eggs/dozen.

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The conversion factor that is a measured number is d. 25 miles/gallon.

In the given options, the conversion factor "25 miles/gallon" is a measured number. It represents the relationship between distance (miles) and fuel consumption (gallons) and is typically determined through direct measurement of fuel efficiency.

This conversion factor is used to convert distances traveled in miles to the corresponding fuel consumption in gallons. It is commonly employed in contexts such as vehicle fuel economy calculations or estimating fuel usage.

On the other hand, options a, b, c, and e are not measured numbers but are typically defined by a fixed relationship. For example, 10 cm/dm represents the fixed conversion between centimeters and decimeters, while 12 in/ft represents the fixed ratio between inches and feet.

In summary, of the provided options, the conversion factor that is a measured number is "25 miles/gallon." This conversion factor is derived from direct measurements of fuel consumption and distance traveled and is used for calculations related to fuel efficiency.

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Answer:

Weight varies with location depending upon the acceleration due to gravity eg. for a mass m = 10kg on Earth it`s weight is W = mg = 10 x 10 = 100N.

Explanation:

Near Earth's surface, the weight of an object in newtons is  10 times its mass in kilograms. This relationship of the acceleration is due to gravity on Earth, which is 9.81 m/s².

Mathematically, it can be expressed as:

Weight (in newtons) = Mass (in kilograms) × Acceleration due to gravity

So, an object with a mass of, for example, 5 kg, its weight near the Earth's surface would be:

Weight = 5 kg × 9.81 m/s² = 49.05 N

The weight in newtons is roughly 10 times the mass in kilograms of objects near the Earth's surface. The given statement is correct.

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Answer:

the theory of behaviorism

Explanation:

i looked it up¯\_(ツ)_/¯

Answer:

mercury

Explanation:

edge 2020

Answer:

number 4

Explanation:

The reflection of light happens when the light bounces off the reflecting surface. That is described by the last (bottom) schematics.

Therefore, select answer number 4.

Answer:

The voltmeter, some wire, and the directional compass

Explanation:

The battery, wire, directional compass and a iron nail  can be used together to demonstrate the magnetic field of moving charge.

In the surroundings of a magnet, an electric current, or a shifting electric field, there is a vector field called a magnetic field where magnetic forces can be seen. Electric charges in motion and the intrinsic magnetic moments of elementary particles connected to the fundamental quantum characteristic known as spin create a magnetic field. One of the four fundamental forces of nature, the electromagnetic force, is made up of the electromagnetic field, which includes both the magnetic field and the electric field.

A battery, wire and a iron nail can be used to form a circuit, where iron nail is used as a resistor to stabilize the battery. The current is now flowing through the closed circuit. Now if a directional compass is brought near the circuit, it will deflect in certain direction to demonstrate the magnetic field produced by the moving charge.

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Answer:

300km

Explanation:

we use the formula s=d/t and solve for d.

d=st

s1=70km/h

s2=80km/h

t=2h

total d= (ts1)+(ts2)

=2(70)+2(80)

=300km

The tin can can carry up to 5,792.76 g of lead shot without sinking in water.

The volume of air can be approximated by assuming that the can is a cylinder with a radius of 3 cm and a height of 14 cm, giving a volume of \(396 cm^3\). Therefore, the volume of the can submerged in water would be 1260 - 396 = \(864 cm^3\).

Next, we can calculate the weight of the displaced water by multiplying the volume of the submerged portion of the can by the density of water, which is 1 g/cm^3.

Weight of displaced water = \(864 cm^3\) x \(1 g/cm^3\) = 864 g

To find the weight of lead shot the can can carry without sinking, we need to subtract the weight of the can and the weight of the displaced water from the buoyant force (which is equal to the weight of the water that the can displaces when fully submerged).

Weight of can = 141 g

Weight of lead shot = buoyant force - weight of can - weight of displaced water

Weight of lead shot = (864 g) x \((11.4 g/cm^3)\) - 141 g - 864 g

Weight of lead shot = 6,797.76 g - 1,005 g

Weight of lead shot = 5,792.76 g

A force equal to the weight of the displaced fluid that operates on a submerged object is known as the buoyant force. In a fluid, this force determines whether an item floats or sinks. When an item is immersed in a liquid, the displacement of the fluid is proportional to the volume of the object.

The buoyant force, which is exerted on the object by this displaced fluid, is upward. The buoyant force of an object determines whether it will float or sink. If it is more than the object's weight, the object will float. The pressure differential between the submerged object's top and bottom causes the buoyant force.

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The velocity of the motorcycle is 13.9 m/s.

The Force required to stop the motorcycle is 966.6 N

The Impulse of the motorcycle is 833 kg.m/s

Velocity is the rate of change of displacement.

To calculate the velocity of the motorcycle, we use the formula below

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

To calculate the force, we use the formula below

Where:

Given:

Substitute into equation 2

Finally, to calculate the impulse, we use the formula below

Where:

Substitute into the equation above

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The efficiency of the machine is determined as 83.3 %.

M.A = load/Effort

M.A = 4500/900 = 5

V.R = distance moved by effort/distance moved by load

V.R = 6/1 = 6

E = M.A/V.R x 100%

E = (5/6) x 100%

E = 83.3 %

Thus, the efficiency of the machine is determined as 83.3 %.

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Frost wedging is a type of physical weathering of rock.

Explanation:

Physical or mechanical weathering affects the rock structurally but does not change the chemical composition. Mechanical forces will rub, break or shatter the rock surfaces. Wedging, abrasion, exfoliation are different types of physical weathering.

Water is one of the main sources which alter the structure of the rocks physically.

Frost wedging occurring due to flow of freezing water over the rocks. This frozen water enters the rock through the cracks and crevices on the rock surface,  and will expand inside and makes the rocks to crack further and breaks it apart.

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Answer:

1) Yes, the work done by gravity during the trip upward is -41.405·m J

2) Yes, the work done by gravity on the ball during the trip downward = 41.405·m J

Explanation:

The given parameters are;

The initial velocity of the ball on the way up = 9.1 m/s

The final velocity of the ball on the way up = 0 m/s

The initial velocity of the ball on its trip downward = 0 m/s

The final velocity of the ball on its trip downward = 9.1 m/s

1) The work done by gravity on the trip upward = The change in kinetic energy of the ball

The change in kinetic energy of the ball = 1/2 × m × 9.1² = -41.405·m J, given that the initial kinetic energy is 41.405·m J and the final kinetic energy is  J

Where;

m = The mass of the ball

Therefore, the work done by gravity during the trip upward = -41.405·m J

2) Similarly gravity does work on the ball during the trip downward = 41.405·m J.

The integral of 1/(1 + x²) is (1/2)ln|1 + x²| + C where C is the constant of integration.

Integration is a mathematical process of finding the antiderivative of a function. To integrate the given expression 1/(1 + x²), we will use the substitution method.

Let u = 1 + x², du/dx = 2x dx, then dx = du/2x and the integral becomes:

∫1/(1 + x²) dx = ∫1/u * (1/2x) du= (1/2)∫1/u du

The antiderivative of 1/u is ln|u| + C, where C is the constant of integration.

Therefore, the final solution of the integral is (1/2)ln|1 + x²| + C.

Let us work through the steps:

Step 1:Let u = 1 + x² and then differentiate both sides with respect to x to obtain du/dx. du/dx = 2x

Substitute 2x dx = du into the integral ∫1/(1 + x²) dx to get the integral in terms of u:∫1/u * (1/2x) du = (1/2) ∫1/u du

Step 2:Calculate the antiderivative of 1/u, which is ln|u|. Thus, the final solution is (1/2)ln|1 + x²| + C, where C is the constant of integration. The constant C will vary depending on the initial conditions of the problem.

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Answer:

To find the total amount of energy used for a stomp rocket, we can consider the different forms of energy involved: potential energy, kinetic energy, and work done by external forces.

The potential energy is given by the formula PE = mgh, where m is the mass of the rocket, g is the acceleration due to gravity (approximately 9.8 m/s²), and h is the height the rocket reaches. Since the height is not provided in the question, we cannot calculate the potential energy without this information.

The kinetic energy is given by the formula KE = (1/2)mv², where m is the mass of the rocket and v is the velocity. Since the initial velocity is not provided, we cannot calculate the kinetic energy without this information.

The work done by external forces can be calculated using the formula W = Fd, where F is the force applied and d is the displacement. In the case of a stomp rocket, the external force comes from the stomp or launch mechanism. Without information about the force applied or the displacement, we cannot calculate the work done by external forces.

Unfortunately, without the initial velocity, initial speed, force applied, displacement, or height reached, it is not possible to calculate the total amount of energy used for the stomp rocket. Additional information would be required to perform the calculation.

The difference between actual overhead incurred and overhead budgeted for the standard hours allowed: Overhead variance.

The hours that should have been worked for the units produced: Standard hours.

The difference between the actual quantity times the actual price and the actual quantity times the standard price: Materials price variance.

The difference between total actual costs and total standard costs: Total cost variance.

The difference between actual hours times the standard rate and standard hours times the standard rate: Labor rate variance.

Predetermined unit costs that are measures of performance: Standard costs.

The difference between normal capacity hours and standard hours allowed times the fixed overhead rate: Volume variance.

Standards based on an efficient level of performance that are attainable under expected operating conditions: Normal standards.

Standards based on the optimum level of performance under perfect operating conditions: Ideal standards.

A double-entry system of accounting in which standard costs are used in making entries and variances are recognized in the accounts: Standard costing.

Overhead variance represents the difference between the actual overhead incurred and the overhead budgeted for the standard hours allowed.

Standard hours refer to the hours that should have been worked for the units produced.

Materials price variance calculates the difference between the actual quantity times the actual price and the actual quantity times the standard price.

Total cost variance indicates the difference between total actual costs and total standard costs.

Labor rate variance measures the difference between actual hours times the standard rate and standard hours times the standard rate.

Standard costs are predetermined unit costs that serve as measures of performance.

Volume variance represents the difference between normal capacity hours and standard hours allowed times the fixed overhead rate.

Normal standards are based on an efficient level of performance that is attainable under expected operating conditions.

Ideal standards are based on the optimum level of performance under perfect operating conditions.

Standard costing is a double-entry system of accounting that utilizes standard costs in making entries and recognizes variances in the accounts.

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Answer:

4.5V

Explanation:

In a arrangement of cells, the cells could be joined end to end(series) or to a common junction (parallel).

When cells are joined in series, the total emf of the cell is the sum of the individual emf of all the cells.

Hence;

Total emf = 1.5V + 1.5V + 1.5 V = 4.5 Volts

Given that the direction sailboat is north and the distance traveled is d = 10 km

The direction of the wind is southeast and the force is

The sailboat travels the distance in time, t = 1 h

We have to find the work done by the wind and wind's power.

The diagram is shown below

The work done by the wind will be

The power of the wind will be

False. The calorie used in physics (also known as the "gram calorie" or "small calorie") is the amount of energy required to raise the temperature of one gram of water by one degree Celsius.

It is equal to 1,000 small calories and is the amount of energy required to raise the temperature of one kilogram of water by one degree Celsius.

The calorie used in measuring the energy content of food (also known as the "kilocalorie" or "large calorie")  often abbreviated as "kcal", it represents the amount of energy obtained from the food when it is metabolized in the human body. So when we refer to "calories" on food labels or in discussions about nutrition, we are actually referring to kilocalories.

Therefore, the two units of measurement are not the same.

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It produces oceanic crust,

If energy is conserved, then initial (PE + KE) = final (PE + KE). So, the correct option is A.

The law of conservation of energy states that, energy can neither be created nor be destroyed, but can be transformed from one form to another.

Here,

According to law of conservation of energy,

The total energy of an isolated system remains constant. That means, the total energy of the system in the initial state will be same as that in the final state.

The total mechanical energy is the sum of kinetic energy and potential energy.

TE = KE + PE

Therefore, the energy to be conserved in the system,

Initial TE = Final TE

So, Initial (KE + PE) = Final (KE + PE)

Hence,

If energy is conserved, then initial (PE + KE) = final (PE + KE).

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