What is the current through a 11v bulb with a power of 99w

Answer:

The lifting force of a balloon is equal to the weight of the air it displaces, minus the weight of the balloon itself and any cargo it is carrying. We can calculate the lifting force using the following formula:

Lifting force = (4/3) x π x r^3 x ρair x g - m_balloon - m_cargo

where:

- r is the radius of the balloon (in meters)

- ρair is the density of air (in kg/m^3), which we'll assume is 1.2 kg/m^3 at sea level and standard temperature

- g is the acceleration due to gravity (in m/s^2), which we'll assume is 9.81 m/s^2

- m_balloon is the mass of the balloon (in kg)

- m_cargo is the mass of the cargo (in kg)

- π is pi (approximately 3.14)

Substituting in the values given in the problem, we get:

Lifting force = (4/3) x π x (7.15 m)^3 x (1.2 kg/m^3) x 9.81 m/s^2 - 930 kg - m_cargo

Simplifying and solving for m_cargo, we get:

m_cargo = (4/3) x π x (7.15 m)^3 x (1.2 kg/m^3) x 9.81 m/s^2 - 930 kg - Lifting force

Plugging in the lifting force we want the balloon to have, which we'll call L, we get:

m_cargo = (4/3) x π x (7.15 m)^3 x (1.2 kg/m^3) x 9.81 m/s^2 - 930 kg - L

Assuming we want the balloon to lift 5000 kg of cargo, we can solve for L:

L = (4/3) x π x (7.15 m)^3 x (1.2 kg/m^3) x 9.81 m/s^2 - 930 kg - 5000 kg

L = 281,581 N

Therefore, to lift 5000 kg of cargo, the balloon needs to have a lifting force of approximately 281,581 N.

Answer:

the answer is d.

Explanation:

Argon (Ar) has a complete valence electron shell.

Answer:

d) argon

.............

The airline will need to have at least 167 passengers on each flight to break even.

To calculate the number of passengers needed to break even, we need to consider the total costs and the revenue generated per flight.

The total cost per flight consists of the fixed costs (£25,000) and the variable costs (£75 per passenger). The revenue per flight is determined by the ticket price (£225) multiplied by the number of passengers.

Let's denote the number of passengers as 'P'. The total cost per flight is given by:

Total Cost = Fixed Costs + (Variable Cost per Passenger * Number of Passengers)

Total Cost = £25,000 + (£75 * P)

The revenue per flight is given by:

Revenue = Ticket Price * Number of Passengers

Revenue = £225 * P

To break even, the total cost should equal the revenue:

£25,000 + (£75 * P) = £225 * P

Now, we can solve this equation for P to find the number of passengers needed to break even:

£25,000 + (£75 * P) = £225 * P

£25,000 = £225 * P - £75 * P

£25,000 = £150 * P

P = £25,000 / £150

P ≈ 166.67

Since the number of passengers must be a whole number, we round up to the nearest whole number:

P = 167

The airline will need at least 167 passengers on each flight to break even. However, since the maximum capacity of the aircraft is 200 passengers, the airline will need to fill the aircraft to its maximum capacity to break even on each flight.

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That depends on the values of the resistors.

If the same two resistors are used in both cases, then the total resistance is more in series and less in parallel.

Here's a catchy little factoid for ya:

-- In series, the total resistance is more than the biggest single one.

-- In parallel, the total resistance is less than the smallest single one.

Why is the moon’s force of gravity less than that of the earth?

Since the moon has a smaller mass than the earth, the moon has less gravity than the earth. Gravity is related to mass.

Larger mass = larger gravity

Smaller mass = lesser gravity

Moon has small mass, therefore less gravity.

Given,

The work done by the engine, W=23 kJ

The time it takes for the engine to do the given amount of the work, t=1800 s

The power is the time rate of change of transfer of energy or the energy transferred in unit time. Thus the power supplied by the engine can be calculated as the ratio of the work done to the time.

Thus the power supplied by the engine is given by,

On substituting the known values,

Thus the power supplied by the engine is 12.78 W.

Answer:

The strength of gravity decreases.

An example of that would be if you were in space; you float around because there's no gravity.

The condition "The particle must be at rest" is not a requirement for a particle to experience a magnetic force when placed in a magnetic field. Hence, option A is correct choice.

When a charged particle travels through a magnetic field at a velocity that is not parallel to the field, a magnetic force is applied to the particle. Equation

F = qvBsinθ

where

F is the magnetic force,

q is the charge of the particle,

v is its velocity,

B is the magnetic field,

θ is the angle between the velocity and the magnetic field, gives this force, which is perpendicular to both the direction of the magnetic field and the velocity of the particle.

Consequently, a charged particle can experience a magnetic pull even when it is not at rest. As long as it reaches the magnetic field with a velocity component that is not parallel to the field, it can be travelling at any speed. Moreover, since a magnetic force only affects charged particles, the particle's charge cannot be zero.

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Question-

Which one of the following conditions is not a requirement for a particle to experience a magnetic force when placed in a magnetic field?

A. The particle must be at rest

B. The particle must be moving

C. The particle must be positively charged

D. The particle cannot enter the magnetic field with a velocity parallel to the field (v same direction as B)

E. The particle must be charged.

Galileo's observation that heavy objects fall in the same way as lighter objects, neglecting air resistance, can be explained by Newton's theory of gravity. According to Newton, every object experiences a force called gravity, which is proportional to its mass.

This force causes objects to accelerate toward the Earth at the same rate, regardless of their mass. This acceleration due to gravity is approximately 9.8 meters per second squared (m/s²) on the surface of the Earth. Galileo's observation that heavy objects fall in the same way as lighter objects, neglecting air resistance, can be explained by Newton's theory of gravity.

According to Newton, every object experiences a force called gravity, which is proportional to its mass. Therefore, both heavy and light objects will fall with the same acceleration, resulting in them falling in the same way. This concept is known as the equivalence principle.

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Answer:

B) Caused by the Sun

Explanation:

If you look at a picture of a solar system, you will see the sun in the middle. The sun is the powerhouse of the solar system. So that means that the sun is the biggest star and can provide enough light to reach earth and keep it lit.

The meaning of the word solar in the article "Fire Up the Sun" is caused by the sun so, option B is correct.

The sun is the star that the earth and the other planets in the solar system orbit. With more than 99 percent of the system's total mass, it is the dominant body. A portion of the tremendous quantity of energy coming from the Sun powers the light and heat that keep Earth habitable for life.

The sun is in the center of a solar system if you look at a picture of one. The solar system's center of gravity is the sun. This indicates that the sun is the largest star and that it can illuminate the earth and keep it bright.

The Sun is a G2 V star, which means that it has a surface temperature of roughly 5,800 kelvins (K), making it the second-hottest star in the yellow G class.

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Considering the definition of impulse, the impulse of the force is 11.06 N×s.

Impulse is a term that quantifies the overall effect of a force acting over time.

In other words, the mechanical impulse of a force relates said force to the duration of its action. It is a vectorial magnitude that has the direction and sense of the force that produces it.  

The impulse I is the product between a force and the time during which it is applied:

I= force× time

The unit of the impulse is the N×s (newton per second).

In this case, you know:

Replacing in the definition of impulse:

I= 1400 N× 0.0079 s

Solving:

I= 11.06 N×s

The impulse of the force is 11.06 N×s.

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Answer:

B

explanation:

The car is not making a change in speed.

When using high-power and oil-immersion objectives, a short working distance is required.

High-power objectives and oil-immersion objectives are specialized lenses used in microscopy to achieve high magnification and resolution. These objectives are typically used in advanced microscopy techniques such as oil-immersion microscopy, which involves placing a drop of immersion oil between the objective lens and the specimen.

One important consideration when using high-power and oil-immersion objectives is the working distance. Working distance refers to the distance between the front lens of the objective and the top surface of the specimen. In the case of high-power and oil-immersion objectives, the working distance is generally shorter compared to lower magnification objectives.

The reason for the shorter working distance is the need for increased numerical aperture (NA) to capture more light and enhance resolution. The NA is a measure of the ability of an objective to gather and focus light, and it increases with higher magnification. To achieve higher NA, the front lens of the objective must be closer to the specimen, resulting in a shorter working distance.

This shorter working distance can be a challenge when working with thick or uneven specimens, as the objective may come into contact with the specimen or have difficulty focusing properly. Therefore, it is crucial to adjust the focus carefully and avoid any damage to the objective or the specimen.

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The speed of the plunger when fired is 13.6 m/s. We can use the principle of conservation of energy to solve this problem.

Initially, the spring has potential energy which is converted into kinetic energy when the plunger is released. The potential energy stored in the spring can be calculated as follows:

PE = (1/2)kx²

where k is the spring constant and x is the compression of the spring.

We can calculate the spring constant as follows:

k = F/x

where F is the force required to compress the spring.

Substituting the given values, we get:

k = 170 N/0.150 m = 1133.33 N/m

Substituting k and x into the formula for potential energy, we get:

PE = (1/2)(1133.33 N/m)(0.150 m)² = 12.8325 J

This potential energy is converted into kinetic energy when the plunger is released. The kinetic energy of the plunger can be calculated as follows:

KE = (1/2)mv²

where m is the mass of the plunger and v is its speed.

Substituting the given values, we get:

12.8325 J = (1/2)(0.0600 kg)v²

Solving for v, we get:

v = √(2(12.8325 J)/(0.0600 kg)) = 13.6 m/s

The plunger will have a speed of 13.6 m/s when fired.

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Answer:

it is called arachnophobia

Explanation:

most reason are they way they walk and jump and the people who know they have 4 eyes

Hope This Helped i Like Spiders (^^vv^^) (spider smiley face)

Answer:

The presence of body hair seems to be significantly associated with both fear and disgust of spiders (Davey, 1991). We suggest that the rationale for this perception (fear of hairiness) is that body hair (or fur) when standing up in many mammals occur when the animal is threatened.

Explanation:

The ratio of longitudinal effective mass to the transverse effective mass is 25:1.

We can start by noting that the constant energy ellipsoid for the conduction band has axes along the principal directions of the effective mass tensor. Let's assume that the ellipsoid has a major axis of length a and minor axes of length b and c. Then we can write:

E = h^2/2m* (k_x^2 + k_y^2/a^2 + k_z^2/b^2)

where m* is the effective mass along the major axis, and we have rescaled the k_y and k_z directions by the appropriate factors.

Since the ratio of the axes is 5:1, we have b=c/5. Furthermore, we know that there are six cigar-shaped minima along [100], so we can assume that the effective mass tensor has cylindrical symmetry about the [100] direction. This means that m* is the same along the [100] direction and the two perpendicular directions, which we can call m_l and m_t.

To find these masses, we need to consider the curvature of the energy surface at the minima. Near each minimum, we can expand the energy as a quadratic function of the deviations from the minimum:

E = E_min + 1/2 (m_lk_l^2 + m_tk_t^2)

where k_l and k_t are the wave vectors parallel and perpendicular to the [100] direction, respectively. We can identify the effective masses as the coefficients of the quadratic terms.

To relate this to the ellipsoid, we note that the wave vector along the major axis is k_l, while the wave vectors along the minor axes are k_t. Using the expression for the energy, we can relate the effective masses to the lengths of the ellipsoid axes:

a = h/sqrt(2mE) = h/sqrt(2m_lE_min)

b = c/5 = h/sqrt(10m_t*E_min)

where we have used the fact that the ellipsoid intersects the energy surface at the minimum, where E=E_min. Solving for m_l and m_t, we get:

m_l = h^2/2E_min a^-2

m_t = 5h^2/2E_min c^-2

Using the ratio of the axes, we can eliminate a and c in favor of b, and obtain:

m_l/m_t = (5/1)^2 = 25

Therefore, the ratio of longitudinal effective mass to the transverse effective mass is 25:1.

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False. The relative humidity will decrease if the mixing ratio drops and the temperature remains unchanged.

Relative humidity is the ratio of the amount of water vapor present in the air to the maximum amount the air can hold at a given temperature, so if the amount of water vapor decreases (due to lower mixing ratio), the relative humidity decreases unless the temperature also decreases.

False. If the temperature remains unchanged and the mixing ratio drops, the relative humidity will decrease. This is because relative humidity is the ratio of the actual amount of water vapor in the air (mixing ratio) to the maximum amount of water vapor the air can hold at a specific temperature. If the mixing ratio decreases while temperature stays constant, the relative humidity will be lower.

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The equal and opposite, according to Newton's third law is when one object exerts a force on another object, the second object will exert an equal and opposite force on the first object.

The force pairs act on different objects, but they are always equal in strength and opposite in direction. Newton's Third Law of Motion states that every action has an equal and opposite reaction. The law means that there is a pair of forces acting on two different objects. The two forces are equal in magnitude but opposite in direction. Therefore, when two objects are interacting, they are always pushing and pulling on each other with equal force.

In simpler words, this law states that when you push against an object, the object pushes back on you with an equal amount of force. The force pairs act on different objects, but they are always equal in strength and opposite in direction. This law is fundamental to understanding the movement of objects in the universe. So therefore the equal and opposite, according to Newton's third law is when one object exerts a force on another object, the second object will exert an equal and opposite force on the first object.

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Answer:

The heat energy required to raise the temperature from 20°C to 85°C is 1.46x10^4J

The rock was dropped from a height of 2.2 m above the top of the door.

Rock is a natural and solid material made up of minerals and other substances. It is typically found in mountainous areas, deserts, and other areas where the Earth's crust is exposed. It is composed of different minerals which give it its hardness and durability. Rock is used in numerous construction projects and other applications. It provides a strong foundation for structures and is used in construction, landscaping, and even in art.

The equation used to solve this problem is s = vt, where s is the distance, v is the velocity, and t is the time.
The velocity of the rock is found by rearranging the equation to v = s/t, so v = 2.2 m / 0.34 s = 6.47 m/s.
The initial height of the rock is found by rearranging the equation to s = vt to s = 6.47 m/s * 0.34 s = 2.2 m.
Therefore, the rock was dropped from a height of 2.2 m above the top of the door. Expressed to two significant figures, this is 2.2 m.

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The frequency of the G allele in the population is 0.4, the correct option is B. 0.4.

The frequency of beetles with glabrous elytra in a population of ground beetles is 0.36. The frequency of the G allele is to be calculated, assuming that the population is in Hardy-Weinberg equilibrium.

What is Hardy-Weinberg equilibrium? The Hardy-Weinberg equilibrium is a model that describes the genetic makeup of a non-evolving population.

This model postulates that the genetic variation in a population remains constant from generation to generation in the absence of disturbing influences such as mutation, migration, or natural selection.

According to the Hardy-Weinberg equilibrium, the frequency of alleles and genotypes remains constant if certain conditions are met.

The Hardy-Weinberg equilibrium is represented by the following equation:p2 + 2pq + q2 = 1 Where:p2 = frequency of homozygous individuals (GG)2pq = frequency of heterozygous individuals (Gg)q2 = frequency of homozygous recessive individuals (gg)p + q = 1Now let's move on to the calculation of the frequency of the G allele.

The frequency of individuals with the gg genotype can be obtained from the following equation:q2 = 0.36q2 = 0.36^(1/2)q = 0.6

The sum of the frequency of all genotypes must be equal to 1, which can be used to calculate the frequency of the G allele:p + q = 1p = 1 - qp = 1 - 0.6p = 0.4The frequency of the G allele in the population is 0.4.Therefore, the correct option is B. 0.4.

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When the fan cart is on a frictionless surface and a wooden surface, the forces acting on it are different. When the fan cart is placed on a frictionless surface, the force acting on it is the thrust force created by the fan, and there is no friction.

On the other hand, when the fan cart is placed on a wooden surface, the force acting on it is the thrust force created by the fan, and there is friction between the cart and the surface. Due to the presence of friction, the fan cart may take longer to come to a stop when placed on a wooden surface. The amount of friction acting on the fan cart on the wooden surface depends on the type of surface and the force of the thrust created by the fan.

When there is no friction on the surface, the cart will move without being interrupted, whereas when the cart is placed on a wooden surface, friction will act against it. The frictional force will vary based on the type of surface and the force exerted by the thrust generated by the fan.

Therefore, the forces acting on the fan cart will be different based on the surface it is placed on. When it is on a frictionless surface, there is no friction acting on it, and when it is on a wooden surface, there is a force of friction acting against it.

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Question:

What is a disadvantage of using nuclear power to produce electricity?

Answer:

Disadvantages of Nuclear Power

The further implementations of nuclear power are limited because although nuclear energy does not produce CO2 the way fossil fuels do, there is still a toxic byproduct produced from uranium-fueled nuclear cycles: radioactive fission waste.

Answer:

Disadvantages of nuclear energy include the high cost of building a power plant and safety concerns about the operation of the plant and disposal of spent fuel rods.

Explanation:

Hope this helps.

The cycle of water or H₂O evaporating from lake and other bodies of water forming clouds and rain back to the surface of the earth happens in hydrosphere and stratosphere.

Hydrosphere is defined as water that is on the earth including surface of the planet such as ocean, lake and ice, underground source of water such as groundwater, as well as moisture in the air. The water, also known as H₂O gets heated up by the sun, evaporates into the air forming clouds happen in the atmosphere of the earth, specifically stratosphere, where most of the clouds are forming. After the clouds can no longer hold the accumulation of vaporization of the water, it will eventually get released back into the earth in the form of rain or snow.

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The step that is not part of a normal convection cycle is : Warmed air sinks, creating a high-pressure area as it falls.

The correct answer is option D.

In a normal convection cycle, the following steps occur:

A. Unequal heating creates a pressure difference: When a fluid, such as air, is heated unevenly, it creates regions of different temperatures. This temperature difference leads to a difference in air density and, consequently, a pressure difference.

B. Air flows from a high-pressure area to a low-pressure area: Due to the pressure difference created by unequal heating, air moves from the region of higher pressure to the region of lower pressure. This movement is known as the flow of air or fluid.

C. Cooled air sinks toward the surface, creating a low-pressure area above it: As the heated air rises and moves away from the heat source, it gradually cools down. Cooled air is denser than warm air, so it tends to sink back toward the surface, creating a low-pressure area above it.

Option D states that warmed air sinks, creating a high-pressure area as it falls. However, in a normal convection cycle, warmed air tends to rise due to its lower density compared to the surrounding air. The rising of warm air contributes to the creation of low-pressure areas.

Therefore, option D is not part of a normal convection cycle.

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The question probable may be:

Which step is not part of a normal convection cycle?

A. Unequal heating creates a pressure difference.

B. Air flows from a high-pressure area to a low-pressure area.

C. Cooled air sinks toward the surface, creating a low-pressure area

D. Warmed air sinks, creating a high-pressure area as it falls.

Answer:

the action of polarizing or state of being or becoming polarized: such as the action or process of affecting radiation and especially light so that the vibrations of the wave assume a definite form. Polarization, in Physics, is defined as a phenomenon caused due to the wave nature of electromagnetic radiation. There are two types of waves, transverse waves, and longitudinal waves.

plz mark brainliest

Answer:

V= 5.3 Km/hr

Explanation:

Got the answer from class today

hope it helps :)