Kamal said the distance from the top of the balloon to the ground in the Example is Ï···· 353 ft. What mistake might Kamal have made? 1 2

Answer:

I would say the answer is A... but I'm not so sure ....

Given :

Capacity of capacitor is, [tex]C = 10\ \mu F[/tex].

To Find :

At what voltage can a 10 μF capacitor be energized to 0.45 J.

Solution :

We know, energy in capacitor is given by :

[tex]E = \dfrac{CV^2}{2}[/tex]

So,

[tex]V = \sqrt{\dfrac{2E}{C}}\\\\V = \sqrt{\dfrac{2\times 0.45}{10}}\ \mu V\\\\V = 0.3 \ \mu V[/tex]

Therefore, voltage required is [tex]0.3 \ \mu V[/tex] .

Answer:

150 km/hr²

Explanation:

The data for the motion of the train includes;

The train starts from rest, therefore, the initial velocity of the train, u = 0 km/hr

The speed of the train after 0.5 hours, v = 75 km/hr

The change in time during the motion of the train, Δt = 0.5 hours

The acceleration, 'a', is the rate of change of velocity with time;

[tex]a = \dfrac{\Delta v}{\Delta t} = \dfrac{v - u}{\Delta t}[/tex]

Therefore, we have;

a = (75 km/hr - 0 km/hr)/(0.5 hr) = 150 km/hr²

a = 150 km/hr² = 150 km/hr² × 1,000 m/km × hr²/(3,600 s)² = 5/432 m/s²

The acceleration of the train, a = 150 km/hr² = 5/432 m/s².

Answer:

Im not 100% sure so don't completly rely on these answer s

#1 is B

#2 ia B

#3 is A

#4 is A

#5 is A

and i think #6 is A

im 100% sure that 3 and 4 are A tho  

Explanation:

Explanation:

thet amplify DC, because of the voltage ( small current input signal)

Answer:

Yes,by using direct coupling(transistors) amplifier we will amplify low frequency (DC) signals. A transistor is certainly capable of taking a small-current input signal and controlling a high-current output at the same voltage, thereby amplifying the power of the input signal whether it's AC or DC.

Can you give me brainliest?please?

Answer:

b is your answer

Explanation:

Answer:

C

Explanation:

Group one elements share common characteristics. They are all soft, silver metals. Due to their low ionization energy, these metals have low melting points and are highly reactive. The reactivity of this family increases as you move down the table.

Atomic Mass = The sum of protons and neutrons in an atom. (Third option).

Atomic Number - The number of protons in an atom. (First option).

Mass Number - Exact amount of protons and neutrons (Last option).

Protons and Electrons - Charged particles of an atom (Fifth Option).

Protons and Neutrons - Particles in the Nucleus of an atom (Fourth option).

Valence Electons - Outermost particles of a shell. (Second Option).

Hope this helped!

Answer:

4.13×10⁻⁷ m

Explanation:

Applying

v = λf................... Equation 1

Wherfe v = speed of light, λ = wavelength of light, f = frequency of light.

make λ the subject of the equation

λ = v/f....................... Equation 2

Note: Light is an electromagnetic wave, and all electromagnetic wave moves with thesame speed which is 3×10⁸ m/s.

From the question,

Given: f = 7.26×10¹⁴ Hz

Constant: v = 3×10⁸ m/s

Substitute these values into equation 2

λ = (3×10⁸)/(7.26×10¹⁴)

λ = 4.13×10⁻⁷ m

Answer:

speed will be constant and so no acceleration

Explanation:

the body will move toward the weaker force, but since the forces are constant there will be no acceleration.

Answer:

If they are looking at a large enoug h angle of incidence against a relatively calm surface, all the light will be internally reflected, allowing the  swimmers to see each other.

Explanation:

Answer:

B. they must be intrinsically far more luminous than the brightest galaxies.

Explanation:

Quasar is famous for being an intergalactic object which is billions of years away from the earth yet can still be seen, unlike the other star body, unlike giant galaxies.

Hence, the fact that quasars can be detected from distances where even the biggest and most luminous galaxies cannot be seen means that "they must be intrinsically far more luminous than the brightest galaxies."

This condition, including other related evidence gotten in recent years concerning our galaxy, has shown that quasars are probably the central nuclei of very distant, very active galaxies.

Answer:343m

Explanation:

Answer:

(A)²

Explanation:

Atomic mass = density*volume of atom.

So, density of nucleus is in depend of mass number

d=

3

4

πr

3

Massno.

=

3

4

π×[1.3×10

−13

×A

1/3

]

3

A

=constant∗A

0

as R=R

0

A

1/3

(R

0

=1.1×10

−15

m)

The numerical value of the density of a nucleus of atomic number A is determined as 2.29 x 10¹⁷ kg/m³.

The density of the nucleus of atomic number A​ is calculated as follows;

ρ = m/V

where;

[tex]\rho = \frac{m}{V} \\\\\rho = \frac{m}{\frac{4}{3} \pi r^3} \\\\\rho = \frac{1.66 \times 10^{-27}}{\frac{4}{3} \pi (1.2 \times 10^{-15})^3} \\\\\rho = 2.29 \times 10^{17} \ kg/m^3[/tex]

Thus, the numerical value of the density of a nucleus of atomic number A is determined as 2.29 x 10¹⁷ kg/m³.

The complete question is below:

​find the numerical value of the density of a nucleus of atomic number A​ with a radius of  1.2 x 10⁻¹⁵ m and mass of 1.66 x 10⁻²⁷ kg.

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Answer:

5kg is 5000gm hope it helps

Answer:

that is not physics pls dont do that again

Explanation:

Explanation:

the force effect the aeroplane and ship are Gravity and drug

Answer:

The answer is GRAVITY and DRUGS

Explanation:

Hope you have a good day :)

Answer:

yes

Explanation:

it is regulated in United States that is non flamable gas

Answer:

Oh I had this question before! :)

Explanation:

Acid - citrus products - the classic one is lemon juice

Anything with a sour taste is acidic

Base - soap, oven cleaner, drain cleaner, baking soda

Basic things are bitter (please don't taste the drain cleaner and oven cleaner)

magnification = [tex]\bf\dfrac{height of image}{height of object}[/tex]

= [tex]\bf\dfrac{6cm}{10cm}[/tex]

= 0.6

Answer:

9/10

Explanation:

Answer.:

Explanation:

The image is either virtual or real and the height of the image is 10cm.

To find the image type and its height, we need to know about the magnification of convex lens.

          Height of image/height of object or image distance(V) / object distance(U)

So, image height = magnification × object height

                            = 2×5 = 10 cm

Thus, we can conclude that the image is virtual if it's formed on the left of the lens and is real if it's formed on the right of the lens. The height of the image is 10 cm.

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Given :

An engine creates a 2230 N force that pushes a car forward 58.3 m in 9.40 s.

To Find :

How much power does the engine produce in Watt.

Solution :

We know, Work done is given by :

[tex]W = F.d\\\\W = 2230 \times 58.3 \ J\\\\W = 130009\ J[/tex]

Now, Power is given by :

[tex]Power = \dfrac{Work \ Done}{Time \ Taken}\\\\P = \dfrac{130009}{9.4}\ W\\\\P = 13830.74\ W[/tex]

Therefore, power produced by engine is 13830.74 W.

Answer:

the first one is higher

Explanation:

i d k what the second one is

Answer:

True.

Explanation:

An electric circuit can be defined as an interconnection of electrical components which creates a path for the flow of electric charge (electrons) due to a driving voltage.

Generally, an electric circuit consists of electrical components such as resistors, capacitors, battery, transistors, switches, inductors, etc.

This electrical network which is usually a closed loop comprises of a device that provides the energy (voltage) to drive electrons or electric current; the device is referred to as a source such as a generator or battery.

Similarly, an integrated circuit (IC) also referred to as microchip can be defined as a semiconductor-based electronic component that comprises of many other tiny electronic components such as capacitors, resistors, transistors, and inductors.

Generally, integrated circuits (ICs) are used in virtually all modern electronic devices to carry out specific tasks or functions such as amplification, timer, oscillation, computer memory, microprocessor, etc.

Explanation:

Always write what you know first about the problem

The surface of the piston that has the force applied is a circle

The area of a circle is pi x r^2

Pressure is Force / Area

Write this out

P = F / (pi x r^2)

solve for r

sqrt( F / (P x Pi)) = r

But dont forget that d = 2 x r

The diameter of the piston is equal to 3.38 inches.

The pressure can be defined as the force that is applied per unit area. Force will be applied perpendicular to the surface per unit area. pressure can be measured in the unit of pascal. A Pascal can be defined as the pressure exerted by one force Newton on one square area.

The mathematical expression to calculate pressure is:

Pressure = Force/area

Given, the maximum pressure of the piston, P = 2.5 psi

We know that 1 psi = 703.07 Kg/m²

P = 2.5 × 703.07 = 1757.67 Kg/m²

The force applied, F = 100N = 100/ 9.8 Kg = 10.20 Kg

The area of the piston, A = F/P

A = 10.20/1757.67

A = 0.00580 m²

Area of the piston, A = πr²

0.0058 = 3.14 × r²

r = 0.04297 m

Diameter, d = 2r = 0.0859 m

We know that one meter = 39.37 inch  

The diameter of the piston, d = 0.0859 × 39.37 = 3.384 inch

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Answer:

208 Joules

Explanation:

The radius of the circular path the charge moves, r = 26 m

The magnetic force acting on the charge particle, F = 16 N

Centripetal force, [tex]F_c[/tex] = m·v²/r

Kinetic energy, K.E. = (1/2)·m·v²

Where;

m = The mass of the charged particle

v = The velocity of the charged particle

r = The radius of the path of the charged particle

Whereby the magnetic force acting on the charge particle = The centripetal force, we have;

F = [tex]F_c[/tex] = m·v²/r = 16 N

(1/2) × r × [tex]F_c[/tex] = (1/2) × r × m·v²/r = (1/2)·m·v² = K.E.

∴ (1/2) × r × [tex]F_c[/tex] = (1/2) × 26 m × 16 N =  = (1/2)·m·v² = K.E.

∴ 208 Joules = K.E.

The kinetic energy of an particle moving in the circular path, K.E. = 208 Joules.