What invented aeroplane’s

Answer:

[tex]\lambda=1.37\times 10^{-11}\ m[/tex]

Explanation:

Give that,

The potential difference of the electrons, [tex]V=8\times 10^{3}\ V[/tex]

We need to find the wavelength of the electrons.

Using the conservation of energy,

[tex]2meV=\dfrac{h^2}{\lambda^2}\\\\\lambda=\sqrt{\dfrac{h^2}{2meV}}[/tex]

Put all the values,

[tex]\lambda=\sqrt{\dfrac{(6.63\times 10^{-34})^2}{2\times 9.1\times 10^{-31}\times 1.6\times 10^{-19}\times 8\times 10^3}}\\\\\lambda=1.37\times 10^{-11}\ m[/tex]

So, the wavelength of the electrons is [tex]1.37\times 10^{-11}\ m[/tex].

Daniel will earn $2.20 more a week because his pay increase will increase his pay from $8 to $8.40.

The crucial question to respond to is this one. When making your request for a raise, make a list of all the reasons why you desire one.

Don't ask for a raise because your rent increased or because you're annoyed that your coworker doesn't put in as much effort yet is paid the same as you.

Your request should be supported by arguments that are based on your performance and the value you provide to the team and the corporation.

After doing their annual performance review, which may occur at the beginning of the new year or at the conclusion of the first quarter of the year, businesses typically change the pay of their personnel.

Therefore, Daniel will earn $2.20 more a week because his pay increase will increase his pay from $8 to $8.40.

To learn more about Daniel, refer to the link:

https://brainly.com/question/1590190

#SPJ7

Answer:

5N towards north

Explanation:

Answer:

I think the answer is B

hope this helps

have a good day :)

Explanation:

Answer:

Explanation:

a. the sound energy is converted into electrical signals using diaphragm present in the microphone and these signals then reach to the speakers and then convert- ed back to sound. The electrical current generated by a micro- phone is very small and referred to as MIC-level; this signal is typically measured in millivolts.

b. Thermodynamics

P = 7.3 × 10^-13 Watt

Explanation:

First of all, are you sure that what you have is the right answer?

Anyway, the definition of power dissipated is given by

P = I^2×R

where I is the current and R is the resistance. But we also know from Ohm's law that

V = IR

so we can rewrite the equation for power P as

P = I^2R = I(IR) = VI

= (0.0054 volt)(1.35 × 10^-10 A)

= 7.3 × 10^-13 Watt

Answer:

This is because it is derived from newtons and metres as shown in the expression;

Explanation:

[tex]pressure = \frac{force}{area} \\ P= \frac{F}{A} \\ P= \frac{newtons}{ {m}^{2} } \\ = pascals[/tex]

Answer:

Unit of pascal is called derived unit because it involves three fundamental units i.e.meter,kg,and second.

Explanation:

formula of pascal=kg/m/s^2

Answer: 3300 m/s

F = ma; units: N = kg(m/s/s); where F and a are both vectors, while m, t, and v (speed) are scalars

We are given the mass, force, and the time; however, speed is our unknown.

[F = 16500 N]  [m = 10 kg]  [t = 2 s]  [v = unknown]

What we can do is use kinematics in order to relate v and t with F and m:

For example, we can use V = V₀ + at

Since F = ma can equal a = F/m, we can replace the a variable within the kinematics equation with F/m, so that:

V = V₀ + at

V = V₀ + (F/m)t

In this problem, we can assume the initial value V to equal 0, giving us:

V = (F/m)t

Plugging in the quantities we get:

V = [tex]\frac{16500 N}{10kg}[/tex]· 2s

V = 3300 m/s

To further check whether this is the right manipulated equation to use, we can use dimensional anaylsis to determine that:

V = [tex]\frac{kg(m/s/s) }{kg}[/tex]· s

V = m/s

I hope this helped!

Answer:

Explanation:

In the chloroplast, photosynthesis occur. The chloroplast capture light energy from the sun and use it with carbondioxide and water to produce glucose and oxygen. Chloroplasts is found in plant cells only

But mitochondria is refer as the power House of the cell. It's break down fuel molecules and produce energy in cellular respiration. Mitochondria is found in both plant and animal cell.

[tex]ke = \frac{1}{2} m {v}^{2} [/tex]

[tex]44 = \frac{m {4}^{2} }{2} \\ \frac{88}{16} = m \\ 5.5 = m[/tex]

Answer:

I think 75 m

Explanation:

tell if it was correct

Answer:

C. The student should make a concave lens model because it directs light away from the center of the lens

Explanation:

The student should make a concave lens model because it directs light away from the center of the lens.

A lens that has at least one inward-curving surface is said to be concave. Since it is a divergent lens, light rays that have been bent by it are dispersed. Short-sightedness is treated by concave lenses, which are thinner in the center than the borders (myopia).

The earliest known usage of a corrective lens is mentioned in Pliny the Elder's writings (23–79). Pliny claims that Emperor Nero used an emerald, perhaps concave formed to adjust for myopia, to watch gladiatorial matches.

After passing through the lens, light beams appear to originate from a spot known as the primary focus.

Therefore, The student should make a concave lens model because it directs light away from the center of the lens.

To learn more about Concave lens, refer to the link:

https://brainly.com/question/2919483

#SPJ5

Answer:

32 g

Explanation:

Applying,

R = (R')2ᵃ/ⁿ............... Equation 1

Where R = Amount of mercury-197 needed to be ordered, R' = amount of mercury-197 needed for the study, a = time allowed for shipment, n = half life.

From the question,

Given: R' = 1 g, a = 15 days, n = 3 days

Substitute these values into equation 1

R = 1(2¹⁵/³)

R = 1(2⁵)

R = 32 g

Answer:

6.67

Explanation:

Answer:hereeee for pointssss only

Explanation:

The acceleration of gravity on Ganymede will be [tex]g=0.35\ \frac{m}{s^2}[/tex]

It is given that for a simple pendulum on Ganymede

Lenth= 1.00 m

the time period  T= 10.5 sec

The formula for a time period of simple pendulum will be

[tex]T=2\pi\sqrt{\dfrac{l}{g} }[/tex]

By rearranging the formula

[tex]g=l\times (\dfrac{2\pi}{T} )^2[/tex]

[tex]g=1\times (\dfrac{2\pi}{10.5} )^2=0.3577\frac{m}{s^2}[/tex]

[tex]g=0.3577\ \frac{m}{s^2}[/tex]

Thus the acceleration of gravity on Ganymede will be [tex]g=0.35\ \frac{m}{s^2}[/tex]

To know more about simple pendulums follow

https://brainly.com/question/26449711

Answer:

A. kilometers

Explanation:

Answer:

It is 3 m/s² downward.

Explanation:

The mass of an object, m = 30 kg

Upward force, F = 200 N

Downward force, F' = -300 N

We need to find the magnitude and direction of its acceleration.

Net force = F+F'

= 200+(-300)

= -100 N

We know that,

Force, F = ma, a is acceleration of the object

[tex]a=\dfrac{F}{m}\\\\a=\dfrac{-100}{30}\\\\a=-3.33\ m/s^2\approx -3\ m/s^2[/tex]

Hence, the acceleration is -3 m/s² and it is acting in the downward direction.

Answer:

20V

Explanation:

Given: I=2A

           R=10Ω

Solution: V = I × R

                  =(2A)×(10ohm)

                  =20V

Answer:

it will obviously be decreased by 40p

Answer:

En un proceso isotérmico, es decir, la temperatura no cambia, el trabajo puede escribirse como:

W = n*R*T*Ln(P1/P2)

Donde P1 es la presión inicial y P2 la presión final.

Donde las cantidades:

n =  número de moles

R = constante de los gases ideales

T = temperatura no cambian.

Y sabemos que la ecuación de la energía interna es:

U = C*n*R*T

Donde C es otra constante que depende del gas.

De aca, podemos concluir que ninguna de estas variables cambia en nuestro proceso, por lo que la variación de la energía interna es cero.

U2 - U1 = 0

b) Para el calor cedido o absorbido, la formula básica es:

ΔQ = C*(T2 - T1)

Donde ΔQ es el calor absorbido o cedido por el gas, C es una constante que depende del gas, T2 es la temperatura final del gas y T1 es la temperatura inicial del gas.

Como la temperatura no cambia en el proceso, entonces:

T2 = T1

ΔQ = C*(T2 - T1) = C*0 = 0

No hay calor absorbido ni cedido.

c) Podemos concluir que en un proceso isotérmico la energía interna no cambia, y no hay un intercambio de calor.

Answer:

Presiune = 350 N/m²

Explanation:

Având în vedere următoarele date;

Forța = 700 N

Suprafață = 2 m²

Pentru a găsi presiunea;

Matematic, presiunea este dată de formulă;

Presiune = forță/zonă

Înlocuind în formulă, avem;

Presiune = 700/2

Presiune = 350 N/m²

Answer:Potential Energy

Explanation:

Given

The ball is 4 ft above the ground

The ball is possessing Potential energy, which is relative energy and depends upon the reference frame. The potential energy with respect to the ground is the product of mass, acceleration due to gravity, and distance of the ball from the ground.

Question:

If you push a bowling ball and a golf ball with an equal force what will happen

Answer:

B)

Explanation:

Larger than the force used to push the object that has less mass. A golf ball and a bowling ball are moving at the same velocity. When gravity and air resistance are equal, the object has drawn its terminal velocity.

mB = 45 kg

Explanation:

Using conservation of linear momentum,

mAvA + mbvB = (mA + mB)v

(60 kg)(5.5 m/s) + (2.0 m/s)mB = (60 kg + mB)(4.0 m/s)

(330) + 2mB = 240 + 4mB

2mB = 90

mB = 45 kg

Answer: [tex]337.5\ N[/tex]

Explanation:

Given

Energy associated with football is [tex]E=108\ J[/tex]

The receiver takes 0.32 m to stop the ball

Suppose F is the force applied

[tex]\therefore W=F\cdot d\\\text{Insert the values}\\\\\Rightarrow 108=F\times 0.32\\\\\Rightarrow F=\dfrac{108}{0.32}\\\\\Rightarrow F=337.5\ N[/tex]

Answer:

 μ= 0.0375,  kinetic

Explanation:

For this exercise we set a reference system with the x axis parallel to the chord

Y axis  

      N - W = 0

      N = W

X axis

      T - fr = 0

the expression for the friction force is

      fr = μ N

we substitute

       T - μ W = 0

       μ = T / W

we calculate

         μ = 1.5 / 40

        μ= 0.0375

coefficient of kinetic friction

Answer:

do we have to choose 2 answers here?

Answer:

most probably it's C

Explanation:

alveoli is surrounded by capillaries and whit that option small intestines is also there

Solution :

Philosophy is idealism

The idealism is considered as a philosophical approach where the main belief is that 'ideas' are the only true realities and it is the only thing that is worth knowing.

Philosophy in cynicism

In cynicism philosophy, it is belief that the purpose of the life is to live in the virtue and in agreement with the nature. They are practiced by the cynics.

Philosophy in stoicism

Stoicism is a philosophy that hails from Rome and Greece. It beliefs in life that provides maximum positive emotions of the people, and it reduces negative emotions. they also believes that it helps people to hone their virtues of the characters.

Answer:

η = 2.2

Explanation:

The index of refraction is given by the following formula:

[tex]\eta = \frac{Sin\ \theta_i}{Sin\ \theta r}[/tex]

where,

η = index of refraction of cubic zirconia = ?

[tex]\theta_i[/tex] = angle of incidence = 56°

[tex]\theta_r[/tex] = angle of refraction = 22°

Therefore,

[tex]\eta = \frac{Sin\ 56^o}{Sin\ 22^o}\\\\\eta = \frac{0.829}{0.375}[/tex]

η = 2.2