Reduced-voltage starting provides ___ current draw over a longer period of time than full-voltage starting

Answer:

-18896.49 V/m

Explanation:

Distance between the two plates = 10 cm = 10 x \(10^{-2}\) m = 0.1 m

Also, one of the plates is taken as zero volt.

a. The potential strength between the zero volt plate, and 7.05 cm (0.0705 m) away is 393 V

b. The potential strength between the other plate, and 2.95 cm (0.0295 m) away is 393 V

Potential field strength = -dV/dx

where dV is voltage difference between these points,

dx is the difference in distance between these points

For the first case above,

potential field strength = -393/0.0705 = -5574.46 V/m

For the second case ,

potential field strength = -393/0.0295 = -13322.03 V/m

Magnitude of the field strength across the plates will be

-5574.46 + (-13322.03) = -5574.46 + 13322.03 = -18896.49 V/m

In order to find the magnitude of the electric field, we can use the equation

E = V / d

where E is the electric field, V is the potential difference, and d is the distance between the two points.

In this case, the potential difference between the ends of the 2-meter stick is 400 V and the distance between the two points is 2 meters. So we can plug in these values into the equation:

E = 400 V / 2 m = 200 V/m

So the magnitude of the electric field is 200 V/m.

The potential difference between its ends of a 2-meter stick that is parallel to a uniform electric field is 400 V. The magnitude of the electric field is  200V/m.

A charged particle placed in a specific location within an electric field experiences an electric force that is measured as the electric field magnitude (E). In terms of volts per meter (V/m), it is the force per unit positive charge (q) at that location.

\(E = \frac{V}{d}\)

E = electric field magnitude in volts per meter (V/m),

V = potential difference in volts (V),

d = distance in meters (m)

V=400 V

d=2 m

\(E = \frac{400}{2}\)

E =  200 V/m.

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First of all, this isn't physics. But, here's the answer:

1 gram is a 1000 milligram and 250 milligram is 250 * 0.001 g which is 0.25 gram.

Since 1 kg is 1000 g, we divide 1000 by 0.25 and we get 1000 * 4 which is 4000.

There are \(4000\) tablets inside the bottle.

Answer:

Explanation:

An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position. When assuming its usual position (i.e., when not drawn), there is no energy stored in the bow. Yet when its position is altered from its usual equilibrium position, the bow is able to store energy by virtue of its position. This stored energy of position is referred to as potential energy. Potential energy is the stored energy of position possessed by an object.

Answer:

Approximately \(3.967\; {\rm kg\cdot m\cdot s^{-1}}\).

Explanation:

Convert velocity to the standard units (meters per second):

\(\begin{aligned}v &= 246.2 \; {\rm km \cdot h^{-1}} \\ &= 246.2 \; {\rm km \cdot h^{-1}}\times \frac{1\; {\rm h}}{3600\; {\rm s}} \times \frac{1000\; {\rm m}}{1\; {\rm km}} \\ &\approx 68.389\; {\rm m\cdot s^{-1}}\end{aligned}\).

Convert mass to standard units (kilograms):

\(\begin{aligned} m &= 58\; {\rm g} \\ &= 58\; {\rm g} \times\frac{1\; {\rm kg}}{1000\; {\rm g}}\\ &= 0.058\; {\rm kg}\end{aligned}\).

When an object of mass \(m\) travels at a velocity of \(v\), momentum of that object would be \(p = m\, v\). In standard units, the momentum of this tennis ball would be:

\(\begin{aligned}p &= m\, v \\ &\approx (0.058\; {\rm kg})\, (68.389\; {\rm m\cdot s^{-1}}) \\ &\approx 3.967\; {\rm kg \cdot m\cdot s^{-1}}\end{aligned}\).

Answer: Momentum of an object, p = 6 kg-m/s

Explanation: It is given that,

Mass of an object, m = 5 kg

Velocity of that object, v = 1.2 m/s

We need to find the momentum of an object. It is equal to the product of mass and its velocity. Mathematically, it is given by :

p = m v

p = 6 kg-m/s

So, the momentum of an object is 6 kg-m/s. Hence, this is the required solution.

The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.

The p-waves travel with a constant velocity of 7 km/s

The time can be calculated by using the formula

t = d / v

where

T1 =  10:05 a.m

d is the distance they take to travel from the epicenter

v is the speed of the p-waves

On average, the speed of p-waves is

v = 7 km/s

d = 5600 km (given)

Substituting the values in the formula;

t = d / v

t = 5600 ÷ 7

t = 800 seconds

Converting into minutes,

t = 800 ÷ 60

t = 13.3

≈ 13 mins

T1 -  13 mins = T2

10:05 - 13 mins = 9.52 am

It means the earthquake occurred prior 13 minutes, that is at 9.52 am.

Therefore, the earthquake occurred at 9.52 am.

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Answer:

just practice it can be confusing im trying to learn to play

Explanation:

Explanation:

We know that momentum is the product of mass and velocity so

An object's mass times its velocity gives the object's momentum

Hope it will help :)

Change in speed = (acceleration) x (time)

4 minutes = 240 seconds

Change in speed = (40 m/s²) x (240 seconds)

Change in speed = 9,600 m/s

What you're actually describing here is a car pulling 4 G's for 4 minutes, and ending up going 21,475 miles per hour.

The driver would definitely NOT get a speeding ticket, because nobody could catch him.

Also, his car would heat up and shoot flames from atmospheric friction.

(He could avoid this with some fancy steering, leave the atmosphere, and end up in low-Earth-orbit.)

Actually, I hope there's nobody in the car.  His experience wouldn't be pretty.

(a)

In order to find the series total resistance, we need to add all resistances:

If three resistances are 40 ohms and three are 80 ohms, we have:

(b)

Now, since the resistances are in parallel, we need to use the expression below:

So we have:

Answer:

(-6,8)

Explanation:

Since v has direction as u, it must be a multiple n of u.

\(\sqrt{(-3n)^+(4n)^2}=10\\9n^2+16N^2 =100\\n^2=4\\n=2\)

therefore v = (3×2, 4×2) = (-6,8)

Galileo challenged the Aristotelian-Ptolemaic model, providing support for the heliocentric model and paving the way for a new understanding of the universe.

Galileo Galilei played a crucial role in challenging the prevailing geocentric model of the universe proposed by Aristotle and supported by Ptolemy. He provided several lines of evidence that effectively disproved their theories and supported the heliocentric model proposed by Nicolaus Copernicus. Some of the key evidence used by Galileo includes:

1. Observations through a telescope: Galileo was one of the first astronomers to use a telescope to observe the heavens. His telescopic observations revealed several important discoveries that contradicted the Aristotelian-Ptolemaic worldview. He observed the phases of Venus, which demonstrated that Venus orbits the Sun and not Earth. He also observed the four largest moons of Jupiter, now known as the Galilean moons, which provided evidence for celestial bodies orbiting a planet other than Earth.

2. Sunspots: Galileo's observations of sunspots provided evidence that the Sun is not a perfect celestial body, as suggested by Aristotle. Sunspots indicated that the Sun has imperfections and undergoes changes, challenging the notion of celestial perfection.

3. Mountains on the Moon: Galileo observed the rugged and uneven surface of the Moon, which contradicted Aristotle's belief in celestial spheres made of perfect, unchanging material. The presence of mountains on the Moon suggested that celestial bodies are subject to the same physical laws as Earth.

4. Phases of Venus: Galileo's observations of the phases of Venus provided direct evidence for the heliocentric model. As Venus orbits the Sun, it goes through phases similar to the Moon, ranging from crescent to full. This observation strongly supported the idea that Venus revolves around the Sun.

These lines of evidence presented by Galileo challenged the Aristotelian-Ptolemaic model, providing support for the heliocentric model and paving the way for a new understanding of the universe. His work marked a significant turning point in the history of science and laid the foundation for modern astronomy.

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Answer:

ncident   -   a ray of light striking surface

focal point - location where parallel rays meet

principal axis  -  a line passing thru center of surface  

focal length   -  distance between center of convex lens or mirror

normal     -      line perpendicular to surface

convex    -     lens or mirror curving outward

refracted   -     changed direction after passing from one medium

concave    -    lens or mirror curving inward

reflected   -    bounced off of a surface

Answer:

5588.46 pence

Explanation:

The following data were obtained from the question:

Power of 1st equipment (P₁) = 10 KW

Power of 2nd equipment (P₂) = 2.5 KW Power of 3rd equipment (P₃) = 600 W

Time (t) = 9 hours per day.

Cost per day = 7.9 pence​ per unit KWh

Cost for a week =?

Next, we shall convert 600 W to KW. This can be obtained as follow:

1000 W = 1 KW

Therefore,

600 W = 600 W × 1 KW / 1000 W

600 W = 0.6 KW

Next, we shall determine the total power consumed. This can be obtained as follow:

Power of 1st equipment (P₁) = 10 KW

Power of 2nd equipment (P₂) = 2.5 KW Power of 3rd equipment (P₃) = 0.6 KW

Total power (Pₜ) =?

Pₜ = P₁ + P₂ + P₃

Pₜ = 10 + 2.5 + 0.6

Pₜ = 13.1 KW

Next, we shall determine the total time of operation in a week. This can be obtained as follow:

From the question given above, we were told that:

1 day = 9 hours

Therefore,

6 days = 6 × 9 = 54 hours.

Thus, the total time of operation is 36 hours.

Finally, we shall determine the cost operating the three (3) equipment for a week (i.e 6 days). This can be obtained as follow:

Total power (Pₜ) = 13.1 KW

Total time (tₜ) = 54 hours

Cost per day (Cₔ) = 7.9 pence​ per unit KWh

Cost per week (Cᵥᵥ) =?

Cᵥᵥ = Pₜ × tₜ × Cₔ

Cᵥᵥ = 13.1 × 54 × 7.9

Cᵥᵥ = 5588.46 pence

Therefore, the cost operating the three (3) equipment for a week (i.e 6 days) is 5588.46 pence

Answer: hope this helps

Explanation:

Answer:

Explanation:

From the graph, acceleration is zero if a distance of 130 m is overcome. The maximum speed at a height from the ground equal to 200 m - 130 m = 70 m. Further, the apple falls evenly!

According to the graph, if a distance of 130 m is overcome, acceleration is zero. The maximum speed at a height of 200 m - 130 m = 70 m from the ground. In addition, the apple falls evenly.

Terminal velocity is the constant maximum velocity reached by an object falling through a fluid (such as air) when the force of gravity pulling the object downward is balanced by the opposing force of air resistance. Initially, as an object falls, its velocity increases due to the acceleration from gravity. However, as the object accelerates, the air resistance acting upon it also increases. Eventually, a point is reached where the air resistance becomes equal to the force of gravity, resulting in zero net force and a constant velocity. This constant velocity is the terminal velocity.

The graph of acceleration plotted against the height fallen provides information about the changing acceleration of the falling apple as it travels down the building. To determine the height at which terminal velocity is reached, you would need to look for the point on the graph where the acceleration levels off or approaches zero. This indicates that the net force acting on the apple is becoming negligible, implying that terminal velocity has been reached.

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The average time it took for the tablet pieces to dissolve in room-temperature water is 42.00 seconds.

Room temperature refers to the typical temperature range that is comfortable for humans in an indoor environment. It is generally considered to be between 68°F (20°C) and 77°F (25°C). However, the exact definition of room temperature can vary depending on the context and the standards of a particular region or industry. In scientific experiments or industrial settings, room temperature may be defined more precisely and may range from 20°C to 25°C, or even narrower ranges such as 22°C to 24°C.

To calculate the average time it took for the tablet pieces to dissolve in room temperature water, we need to add up the times from all three trials and divide by the number of trials (3):

(41.00 + 44.00 + 41.00) / 3 = 42.00 seconds

Therefore, the average time it took for the tablet pieces to dissolve in room-temperature water is 42.00 seconds.

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During the nuclear change we can expect to see different chemical symbols before and after the change

Chemical and nuclear reactions are quite different from one another. Atoms can share electrons with other atoms or participate in an electron transfer to increase their stability in chemical reactions. In nuclear reactions, the atom's nucleus stabilizes itself by going through some sort of alteration. Compared to the energies involved in chemical reactions, the energies produced in nuclear reactions are many orders of magnitude higher. Environmental factors like temperature or pressure do not significantly affect nuclear reactions like they do with chemical ones.

Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei

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Answer:

It will turn back into a solid but it will take some time.

Explanation:

Answer:

a) The work done on the gas during an isothermal expansion is given by:

W = nRT ln(V2/V1)

where n is the number of moles of gas, R is the gas constant, T is the temperature, V1 is the initial volume, and V2 is the final volume.

Since the gas is monatomic, we can use the ideal gas law to find the number of moles:

PV = nRT

n = PV/RT

Substituting this expression for n into the equation for work, we get:

W = PV ln(V2/V1)

where we have cancelled out the R and T terms.

Substituting the given values, we get:

W = (1.20e5 Pa)(0.540 m^3) ln(1.25/0.540) = 1.38e4 J

b) The thermal energy transfer Q during an isothermal process is equal to the work done on the gas. Therefore, Q = 1.38e4 J.

c) The change in internal energy ΔU of a gas during an isothermal process is zero, since the temperature of the gas does not change. Therefore, ΔU = 0.

Answer:is this a question??? I’m so confused

Explanation:

Answer:

i actually dont know im so sorry but i will keep trying to find the answerr

Answer:

Star 1 2 hours

35

Explanation:

Answer:

the answer would be 35 degrees :))))

Explanation:

it was the correct on the quiz,,, good luckk :3!!

It will accelerate continuously. The acceleration put on by gravity will be that. Thus, correct option is: It has the same acceleration as it moves up and down the plane.

The force that pulls items toward the centre of a planetary or other body is known as gravity. The gravitational pull maintains each of the planet in orbit about the sun. The degree to which a coordinate in space-time is invisibly bent determines the intensity of the gravitational "field" at any given place in space or time. Massive items tumble down these bends in the direction of one another. The stronger the attraction between items, the more matter there is, and the closer together things are. And unlike electricity and magnetism, which may either repel or attract, gravity always draws objects together.

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The complete question is as follows:

Answer:

Look below

Explanation:

Part A:

The initial angular velocity of the rotor can be found using the formula:

ω = v/r

where ω is the angular velocity, v is the linear velocity, and r is the radius of the cylinder. Since the rotor is rotating at 9000 rpm, we can convert this to radians per second:

ωi = (9000 rpm) x (2π/60 s) = 942.48 rad/s

The final angular velocity is zero. The frictional torque acting on the rotor is given by:

τ = Iα

where τ is the torque, I is the moment of inertia, and α is the angular acceleration. The moment of inertia for a solid cylinder is:

I = (1/2)mr^2

Substituting in the given values and solving for α, we get:

α = τ/I = (1.73 m⋅N) / [(1/2)(3.72 kg)(0.0760 m)^2] = 371.7 rad/s^2

The final angular velocity is zero, so we can use the formula:

ωf^2 = ωi^2 + 2αθ

where θ is the angle of rotation. Solving for θ, we get:

θ = (ωf^2 - ωi^2) / (2α) = (0 - (942.48 rad/s)^2) / (2 x 371.7 rad/s^2) = 6.76 revolutions

Therefore, the rotor will turn approximately 6.76 revolutions before coming to rest.

Part B:

The time it takes for the rotor to come to rest can be found using the formula:

ωf = ωi + αt

where ωf is the final angular velocity, ωi is the initial angular velocity, and α is the angular acceleration. Solving for t, we get:

t = (ωf - ωi) / α = (0 - 942.48 rad/s) / 371.7 rad/s^2 = 2.535 s

Therefore, it will take approximately 2.535 seconds for the rotor to come to rest.

Given

Newborns

Half are girls

Half are boys

Hospital A, records 50 births a day

Hospital B, records 10 births a day

Procedure

which hospital is less likely to record 80% or more female births?

Answer would be option C

C.The two hospitals are equally likely to record such an event, because the probability of a boy does not depend on the number of births.

Answer:

1.20Nm

Explanation:

Given data

Force= 53.5N

Perpendicular distance= 2.25cm= 2.25/100= 0.0225m

The expression for the torque is given as

Torque= Force* Perpendicular distance

Torque= 53.5*0.0225

Torque= 1.20Nm

Hence the toque produced is  1.20Nm

Ionic compounds conduct electricity when molten (liquid) or in aqueous solution (dissolved in water), because their ions are free to move from place to place. Ionic compounds cannot conduct electricity when solid, as their ions are held in fixed positions and cannot move.

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