What is the charge of this object?

Answer:

Power = 20 Watts

Explanation:

Given the following data;

Voltage = 100 V

Resistance = 500 Ohms

To find the power that is required to light a lightbulb;

Mathematically, power can be calculated using the formula;

[tex] Power = \frac {Voltage^{2}}{resistance} [/tex]

Substituting into the formula, we have;

[tex] Power = \frac {100^{2}}{500} [/tex]

[tex] Power = \frac {10000}{500} [/tex]

Power = 20 Watts

Answer:

Coring is a defect in an alloy (e.g., a copper nickel alloy) that occurs when a heated alloy is cooled too fast for diffusion to occur.

Explanation:

Answer:

soccer, football, volleyball, baseball, locress

Explanation:

hope it helps

Answer:

The beat frequency is 30 Hz

Explanation:

Given;

velocity of the two sound waves, v = 343 m/s

wavelength of the first wave, λ₁ = 5.72 m

wavelength of the second wave, λ₂ = 11.44 m

The frequency of the first wave is calculated as follows;

F₁ = v/λ₁

F₁ = 343 / 5.72

F₁ = 59.97 HZ

The frequency of the second wave is calculated as follows;

F₂ = v/λ₂

F₂ = 343 / 11.44

F₂ = 29.98 Hz

The beat frequency is calculated as;

Fb = F₁ - F₂

Fb =  59.97 HZ - 29.98 Hz

Fb = 30 Hz

Explanation:

everything can be found in the picture

Answer:

200 N

Explanation:

Since Young's modulus for the metal, E = σ/ε where σ = stress = F/A where F = force on metal and A = cross-sectional area, and ε = strain = e/L where e = extension of metal = change in length and L = length of metal wire.

So,  E = σ/ε = FL/eA

Now, since at break extension = e.

So making e subject of the formula, we have

e = FL/EA = FL/Eπr² where r = radius of metal wire

Now, when the radius and length are doubled, we have our extension as e' = F'L'/Eπr'² where F' = new force on metal wire, L' = new length = 2L and r' = new radius = 2r

So, e' = F'(2L)/Eπ(2r)²

e' = 2F'L/4Eπr²

e' = F'L/2Eπr²

Since at breakage, both extensions are the same, e = e'

So,  FL/Eπr² = F'L/2Eπr²

F = F'/2

F' = 2F

Since F = 100 N,

F' = 2 × 100 N = 200 N

So, If the radius and length of the wire were both doubled then it would break when the tension reached 200 Newtons.

Answer:

0.675

Explanation:

hope you get it right

Answer:

[tex]0.675\:\mathrm{s}[/tex]

Explanation:

Displacement can be given as [tex]\Delta x=v_x\cdot t[/tex]

Substituting given values, we have:

[tex]27=40t,\\t=\frac{27}{40}=\boxed{0.675\:\mathrm{s}}[/tex]

Answer:

2.90 meters

Explanation:

Distance of speaker 2 =?

Distance of speaker 1 = 1.47m

Velocity = 343

f = 240Hz

For constructive interference to occur:

Difference in distance or path = wavelength

For minimum distance, n = 1

Distance 2 - distance 1 = nλ

Recall λ = v/f

V = Velocity ; f = frequency

Distance 2 - distance 1 = v/f

Distance 2 - 1.47 = (343/240)

Distance 2 = 1.429 + 1.47

Distance 2 = 2.899 meters

Minimum Distance of speaker 2 for their to be constructive interference = 2.90meters

Answer: 0.280

Explanation: trust.

Answer:

Current = 2 Amperes

Explanation:

Given the following data;

Resistance = 8 Ohms

Power = 32 W

To find the amount of current going through the speaker;

Mathematically, power can be calculated using the formula;

Power = current² * resistance

Substituting into the formula, we have;

32 = current² * 8

Current² = 32/8

Current² = 4

Taking the square root of both sides, we have;

Current = √4

Current = 2 Amperes

Answer:

because it will help it go and funcion more

Explanation:

Answer:

It uses graivity and momentum because since we all know, gravity pulls things down, they have a chaint hat lifts the carts up, and then when it gets to a top, it releases it. When it goes down very high, it will go faster. Then it uses momentum when it goes up, then down again, or a loop to regain speed. IT doesn't need a engine or a motor to speed it up or slow it down because gravity and momentum is already doing the job a engine could. Like I said, when it is high in the sky and released, it goes down in incredible speed. And when it needs more speed to keep the ride going, it can add a loop or tight turns to increase it more.

Answer:

ive never done this befor but i think its 36 times aroud earth a day

Explanation:

384400/400=961  

961% of 27 days is 40minuets

1440/40=36

Answer:

R + 6 ohms

Explanation:

The current is the same in all three resistors

i = 2 amps

The problem is that the total voltage is unknown.

R = r

R1 =3 ohms

R2 = 3 ohms

The voltage drop is E = I*R

I = 2 amps

R1 = 3 ohms

R1 = 3 ohms

E = 3*2 = 6 volts

The second 3 ohm resistor also has 6 volts across it.

The total is 12 volts so far. But we know nothing more on how to solve for R.

All you can say is that the total resistance = R + 6 ohms

Answer:

Hitting the brakes

I guess....

Answer:

if he hits the brakes before it hits the wall then the safest outcome will be that he and his car will be safe.

Answer:

Based on what we have learned so far, in what ways have the experiences of Asian-Canadians stayed the same over time? Why do you think these similarities exist? Please give specific examples to support your ideas.

Explanation:

Answer:

ΔL = 1.2 10⁻³ m

Explanation:

The expression for thermal expansion is

        ΔL = α L₀ ΔT

in this case it indicates that the length is L₀ = 5 m for T₀ = 20C the final temperature is T_f = 40 C

the table shows the value of thermal expansion for steel α = 12 10⁻⁶ C⁻¹

let's calculate

        ΔL = 12 10⁻⁶  5 (40 -20)

        ΔL = 1.2 10⁻³ m

Answer:

Virtual and erect.

Answer:

halved.

Explanation:

Given the following data;

Potential difference = constant

Resistance = 2 * resistance = 2R

To find the current I;

Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.

Mathematically, Ohm's law is given by the formula;

[tex] V = IR[/tex]

Where;

V represents voltage measured in voltage.

I represents current measured in amperes.

R represents resistance measured in ohms.

Making current (I) the subject of formula, we have;

[tex] I = \frac {V}{R} [/tex]

Substituting into the formula, we have;

[tex] I = \frac {V}{2R} [/tex]

[tex] I = \frac {1}{2} * \frac {V}{R} [/tex]

[tex] I = \frac {1}{2} * I [/tex]

Therefore, if the resistance of the resistor is doubled, the current through the resistor is halved.

Answer:

Energy

Explanation:

Answer:

A lightning flash is at least 270,000 mph (434,523 kph)!

Explanation:

Have a great summer :)

Answer:

670,000,000 mph

Explanation:

The speed of lightning. While the flashes we see as a result of a lightning strike travel at the speed of light (670,000,000 mph) an actual lightning strike travels at a comparatively gentle 270,000 mph

Answer:

La tensión es 85.3 N.

Explanation:

Cuando el objeto gira en dirección horizontal, la sumatoria de fuerzas se puede calcular usando la segunda ley de Newton:  

[tex] \Sigma F_{x} =ma_{c} [/tex]

[tex] T = ma_{c} [/tex]  

Dado que el movimiento es horizontal, el peso (que está en el eje y) no contribuye en la sumatoria de fuerzas en el eje x. Por lo que la única fuerza actuando sobre el objeto en la dirección del movimiento es la tensión.  

En donde:                                          

m: es la masa del objeto = 200 g = 0.200 kg

[tex]a_{c}[/tex]: es la aceleración centrípeta

La aceleración centrípeta viene dada por:  

[tex]a_{c} = \omega^{2} r[/tex]

En donde:    

ω: es la velocidad angular del objeto = 3 rev/s

r: es el radio = 1.20 m

Entonces, la tensión es:

[tex]T = m\omega^{2} r = 0.200 kg(3\frac{rev}{s}*\frac{2\pi rad}{1 rev})^{2}*1.20 m = 85.3 N[/tex]

Por lo tanto, la tensión es 85.3 N.  

Espero que te sea de utilidad!                                                                          

Answer:

B) uniform

Explanation:

We can solve this problem by using Boyle's law, which states that:

For a constant mass of an ideal gas kept at constant temperature, the pressure of the gas is inversely proportional to its volume.

Mathematically:

where

p is the pressure of the gas

V is its volume

If we apply the equation to the bottle in the problem, we see that:

- when the volume of the bottle (and therefore, of the gas inside) decreases, than the pressure will increase

- viceversa, when the volume of the bottle increases, the pressure will decrease

The amount by which the pressure increases is inversely proportional to the decrease in volume, so the answer depends on how the volume of the bottle decreases: however, if the volume of the bottle decreases uniformly, then we can say that the pressure inside the bottle will also increases uniformly.

MARK THIS ANSWER AS THE BRAINLIEST PLEASE ❤️

An increase in pressure of a plastic bottle  uniformly decreases by a factor of ten when the volume decreases.

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.Pressure and volume of gas are inversely proportional.

Learn more about pressure,here:

https://brainly.com/question/14760196

#SPJ6

Explanation:

using Ohm's law which is defined as V=IR

where V is the voltage, I is the current and R the resistance

Answer:

Explanation:

Yes i will agree with the driver and wear safety belts because according to the newtons first law of motion it states that " every body continues to be in its state of rest or uniform motion in a straight line unless it is compledd by some external effort to change that state".So according to this if a bus moves our body also moves beacuse effort is applied when in the moving bus.

acceleration=final velocity - initial velocity/time taken

=(20-10 )/20

=10/20

=0.5 m/s

Answer:

1.i)heat

ii.)heat

2.a.)b,c,d,a

b.)a.chlorination

Answer:

B

Explanation:

B

Answer:

B The forces acting on the book are in equilibrium

Explanation:

The book that lies on the table and does not move according to Newton's First Law of motion, because there are no net forces acting on it, therefore the net force (the sum of forces acting on the book) is zero

Therefore, the magnitude of the forces acting on the book and the direction in which the forces acts on the balance each other such that the book is in an equilibrium state because the forces acting on the book (which can cause the book to move) are in equilibrium

Therefore, the book is not moving because the forces on the book are in equilibrium.

Answer:

P.E=mgh 1020=60×10h 1020=600h 1.7kg

Explanation:

first find the volume of room --->

[tex]v \: = 10 \times 12 \times (400 \times {10}^{ - 2} ) \times = 480 \: {m}^{3} [/tex]

then find the mass

[tex]mass \: = \: density \: \times \: volume \: = 480 \times 1.26 = 604.8 \: kg[/tex]

Answer:

60

Explanation:

90+30=120:2=60km/h

Answer: (A) Science is often used to make new technology that people can sell.

Explanation:

Scientific discoveries serve as a basis for industrial developments of new technologies. That development is very often driven by economical considerations. Viable, well-developed, well-implemented solutions sell.

The history of industrialized world is one treasure trove of examples of (A) (think of your iPhone X selling for $1000 a pop)

Explanation: