Which is the equation of a parabola with focus (-2, -4) and vertex (-4, -4)?

Answer:

Mechanical energy is constant and it remains the sum of the potential and kinetic energies in a system.  

In the system, we have inverse relation between potential and kinetic energies so it will make mechanical equal

difference across the 12.0 Ω resistor is 1.20 V, calculate the emf of the cell. 45. Req = 13.5 Ω ... (b) I = V / Reff = 1.5 / 2 = 0.75 A.

Answer:

80

Explanation:

Voltage= current * resistance

V= IR

Remember I= current and the unit of current is amps= A

The statement "The excitation of the mercury vapor glows the phosphorus coating inside the lamp of a fluorescent lighting." is true.

In a fluorescent lamp, the electric current excites the mercury inside the lamp which is in vapor form. This process generates the ultraviolet light wave of very short wavelength, which causes the glow of phosphorus coating inside the lamp. Thus a fluorescent lamp converts the very little electrical energy into useful and sufficient light energy.

--The given question is incomplete, the complete question is "Which of the following statement is true about fluorescent lighting? a) Phosphorus coating inside the lamp of a fluorescent lighting glows by the excitation of the mercury vapor. b) The efficiency of fluorescent lighting is much low."

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Answer:

Apply the equation of motion

v

=

u

+

a

t

The initial velocity is

u

=

5.12

m

s

−

1

The acceleration is

a

=

0.933

m

s

−

2

The time is

t

=

5.7

s

The final velocity is

v

=

u

+

a

t

=

5.12

+

(

0.933

)

×

(

5.7

)

=

10.438

m

s

−

1

Answer:

A

Explanation:if the things have the same charge they will repel makeing the ball move away form its positively charged guy = that the coil gun works.

The evidence that scientists have that Mars used to have a magnetic field is this:

B. The atmosphere of Mars contains evidence of a magnetosphere.

Scientists base whatever conclusions they reach on a subject matter on evidence. To reach their conclusion that mars had a magnetic field that protected it, they used a device known as an orbiter to measure the magnetic strength of mars.

Their discovery showed that the magnetic field on Mars was ten times as strong as the earth's field. This gives evidence of the fact that at a certain time, there was a strong magnetic field on Mars.

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The magnitude of the girl's acceleration is determined as 0.12 m/s².

The magnitude of the girl's acceleration is calculated by applying Newton's second law of motion as follows;

F (net) = ma

where;

The mass of the girl = 35.7 kg

The net force on the girl = 4.35 N

The magnitude of the girl's acceleration is calculated as;

a = F / m

a = 4.35 N / 35.7 kg

a = 0.12 m/s²

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Answer:

A

Explanation:

Answer:

Explanation:

If you are looking for acceleration, then F = ma, where F is the force, m is the mass, and a is acceleration. The direction is eastward and we will call that positive. Therefore,

70.0 = 12a and

a = 5.8 m/s/s

Answer:

See below

Explanation:

Distance traveled = 15 + 30 = 45 km

Displacement (use Pythag theorem)

    15^2 + 30^2 = d^2      d = sqrt (1125) = 33.5 km

Answer:

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Explanation:

ples give a crown

Answer:

need is the answer to the question

Answer:

A house is considered a need

brainiest pls

In summary, the frequency of the electron's motion, when treated classically as a point object moving around the nucleus, is directly proportional to the angular frequency.

As a point object moving around the nucleus, the electron's motion can be described by circular orbits. The frequency of the electron's motion can be calculated using the concept of angular frequency.

The angular frequency, denoted by ω, is defined as the rate at which the electron rotates around the nucleus. It is equal to the change in angle per unit time. Since the electron's motion is circular, the change in angle is given by 2π, which represents a complete revolution around the nucleus.

To calculate the frequency, we need to relate the angular frequency to the time period of the motion. The time period, denoted by T, represents the time it takes for the electron to complete one revolution around the nucleus.

The frequency, denoted by f, is the reciprocal of the time period, given by f = 1/T. Substituting T = 2π/ω into this equation, we can express the frequency in terms of the angular frequency as:

f = ω/2π.

Therefore, the frequency of the electron's motion is directly proportional to the angular frequency.

It's important to note that in classical mechanics, the electron's motion is described by the Bohr model, which has been superseded by quantum mechanics. In reality, the electron's motion is better understood using wave-particle duality and quantum concepts.

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Answer:

thanks for answer:)

Explanation:

The power can be increased by decreasing the time it takes to load 10 items into the truck it can be done by using leverage and putting more boxes in the truck at the same time.

Power refers to the ability of doing work done per unit time, higher the power means more work has been done in less time. The SI unit of power is watt.

Work done is a physical quantity that refers to measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement.

Given:

10 people are loading 10 items in a truck

According to the question we have to maximize the power output.

To do this we need to increase work done per unit time. This can be done in a number of ways which include:

Using leverage and pulley techniques to increase the loading capacity of the individual, so that more work is done in less time and therefore increasing the power output of the work to be done.

The second method would be decreasing the time it takes to load the boxes into the truck which can be done if multiple boxes are loaded into the truck at the same time.

Therefore, the power can be increased by decreasing the time it takes to load 10 items into the truck it can be done by using leverage and putting more boxes in the truck at the same time.

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If N is 300 moles, the gas has a volume of roughly 2029.27 liters at 11.7 atm of pressure and 100 K of temperature.

The following formula must be used to determine a gas's volume using the Ideal Gas Law equation:

PV = nRT

Where:

Pressure is P. (in atm)

Volume is V. (in liters)

n = the substance's quantity (in moles)

R = 0.0821 L atm/mol K, or the gas constant.

Temperature is T. (in Kelvin)

Using the supplied parameters as a starting point, we obtain: (11.7 atm) × V = (300 moles) × (0.0821 L-atm/mol-K) × (100 K)

After simplifying and finding V, we arrive at the following equation: V = (300 moles) × (0.0821 L atm/mol K) × (100 K) / (11.7 atm)

V = 2029.27 liters.

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Answer:

1. False

some metals are ferromagnetic

2.True

3. True

4. True

5. False

The strength of electromagnetic can be increased by increasing the number of wire around it

#1

Very few like Fe,Ni ,Co are ferromagnetic.

#2

True

#3

True

#4

It's Orsterd experiment conclusion

#5

Because

\(\sf B=\mu_o nI\)

If you decrease no of turns magnetic force decreases

Answer:

high sunlight intensity

high wind speed

Explanation:

The environmental conditions in the UK on 7th June 2017 are improved because the electricity generation in the UK is done by the renewable sources of energy.

A renewable resource,  is a type of natural resource that will refill to replace the fraction destroyed by consumption  in a finite length of time in a human timescale, either naturally or other periodic processes.

The environmental conditions in the UK are improved on 7th June 2017 due to following reasons ;

1. The renewable energy sources create comparatively low amounts of Gas (GHG) emissions and traditional pollution,

2. During manufacture and transportation. They do emit some emissions and pollutants.

3. Using fossil fuels to generate electricity that creates no greenhouse gas emissions and lowers some forms of air pollution.

4. Increasing energy diversity and minimizing reliance on foreign fuels.

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Answer: Energy is added, by the man, to the golf club from point X to point Y.

Explanation: i think :)

Answer:

A detailed answer is given in the explanation

Explanation:

FOR CURRENT MEASUREMENT:

In order to measure the current in a component, an Ammeter is used which is included in a multimeter nowadays.

The ammeter is connected in series just before the component by just breaking the circuit at that point and connecting the two terminals of the ammeter to complete the circuit again.

FOR POTENTIAL DIFFERENCE MEASUREMENT:

In order to measure the potential difference across a component, a Voltmeter is used which is included in a multimeter nowadays.

The voltmeter is connected in parallel with the component simply, by connecting the two terminals of the voltmeter across the two ends of the component.

Answer:

It is 52° below the celestial equator.

Explanation:

The declination is the angle in degrees measured north (+) or south (-) of the an imaginary line called the celestial equator.

The celestial equator is a projection of the earth's equator on the celestial sphere. imaginary

The star named Canopus has a declination of approximately –52°.

Since the angle is negative, this shows that it is south or below the celestial equator and at 52° south of the celestial equator.

Thus, the star named Caponus is 52° below the celestial equator.

Answer:

the answer is 'it is 52° below the celestial equator.' :))

Explanation:

its the correct answer on the quizz,,, good luck!! :3

Answer:

E) All of the above.

Explanation:

The idea that the solar system formed from a rotating, collapsing gas cloud that ended up as a disk orbiting the Sun is supported by multiple lines of evidence. The fact that most of the planets revolve and rotate in the same direction, in the same plane, suggests that they formed from a flattened disk of material. Conservation of angular momentum means that a collapsing cloud will spin faster and faster, which is consistent with the observed rotation of the planets and the Sun. We also see clouds of gas and dust in space, and disks around young stars, which provides further evidence for this theory.

Answer:

7.65 T

Explanation:

From the question,

Using,

F = BILsinФ......................... Equation 1

Where F = Force, B = magnetic field strength, I = current, L = Length, Ф = Angle.

Make B the subject of the equation

B = F/ILsinФ........................Equation 2

Given: F = 2.55 N, I = 32 A, L = 3.00 cm = 0.03 m, Ф = 90° (perpendicular)

Substitute into equation 2

B = 2.55/(32×0.03×sin90°)

B = 2.55/0.96

B = 7.65 T

Infrared wave basically have shorter wavelengths than X-rays. The correct option is A.

A section of the electromagnetic radiation spectrum with wavelengths ranging from roughly 700 nanometers (nm) to one millimetre is known as infrared radiation (IR), or simply infrared (mm).

While shorter than radio waves, infrared waves are longer than visible light waves.

Infrared radiation has the ability to ease muscle tension and encourage local blood circulation.

Infrared radiation has been used in conventional medicine to treat conditions including autoimmune diseases and issues with wound healing in addition to relieving muscle pain and tension.

Infrared waves are shorter than radio waves but longer than visible light waves.

Thus, the correct option is A.

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The real power being delivered to the induction motor is 2880 watts or 2.88 kilowatts. This power is the actual power that is being used to drive the motor and perform useful work. It is important to note that in an AC circuit, the power factor can affect the real power being delivered.

The real power can be calculated using the formula: P = V x I x PF, where P is the power, V is the voltage, I is the current, and PF is the power factor. In this case, the voltage is 240 V, the current is 15 A, and the power factor is 0.8. Therefore, the real power can be calculated as follows:

P = 240 x 15 x 0.8
P = 2880 watts

So, the real power being delivered to the induction motor is 2880 watts or 2.88 kilowatts. This power is the actual power that is being used to drive the motor and perform useful work. It is important to note that in an AC circuit, the power factor can affect the real power being delivered. Therefore, it is necessary to consider the power factor when calculating the real power.

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Answer:

\( = \frac{1}{2} m {v}^{2} \\ = \frac{1}{2} \times m\times {2}^{2} \\ = 2m \: joules\)

Answer:

4.26 m/s

Explanation:

h = 0.925

v = 0

u = ?

v = u^2 - 2gh

0 = u^2 - 2gh

u = sqrt 2gh

= sqrt 2*9.8*0.925

= 4.258

= 4.26