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3 years ago

What can be broken down into tiny fundamental subatomic particles?

1 answer:

4 0

The correct answer is matter. Matter is a physical substance, so it is that only option provided that can be broken down to the subatomic particle level.

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The speed limmit on an interstate highway is posted at 75mi/h. What is the speed in kilometers per hour? In feet per second?

jok3333 [9.3K]

I uploaded the answer to a file hosting. Here's link:

tinyurl.com/wpazsebu

4 0

3 years ago

The energy required to dislodge electrons from cesium metal via the photoelectric effect is 207 kJ/mol . What wavelength (in nm)

ki77a [65]

Answer:

So wavelength in nm will be $\lambda =0.956\times 10^{-19}nm$

Explanation:

We have given that the energy = 207 KJ/mol $=207\times 10^3j/mol$

Speed of light $c=3\times 10^8m/sec$

Plank's constant $h=6.6\times 10^{-34}J-s$

According to plank's rule energy of the photon is given by

$E=\frac{hc}{\lambda }$

$207\times 10^3=\frac{6.6\times 10^{-34}\times 3\times 10^8}{\lambda }$

$\lambda =0.956\times 10^{-28}m$

So wavelength in nm will be $\lambda =0.956\times 10^{-19}nm$

6 0

3 years ago

A book light has a 1.4 W, 4.8 V bulb that is powered by a transformer connected to a 120 V electric outlet. The secondary coil o

VLD [36.1K]

Answer:

Turns of the primary coil: 500

Current in the primary coil: Ip= 0.01168A

Explanation:

Considering an ideal transformer I can propose the following equations:

Vp×Ip=Vs×Is

Vp= primary voltaje

Ip= primary current

Vs= secondary voltaje

Is= secondary current

Np×Vs=Ns×Vp

Np= turns of primary coil

Ns= turns of secondary coil

From these equations I can clear the number of turns of the primary coil:

Np= (Ns×Vp)/Vp = (20×120V)/4.8V = 500 turns

To determine the current in the secondary coil I use the following equation:

Is= (1.4W)/4.8V = 0.292A

Therefore I can determine the current in the primary coil with the following equation:

Ip= (Vs×Is)/Vp = (4.8V×0.292A)/120V = 0.01168A

5 0

3 years ago

The two fundamental styles of design established in early motion pictures are the ___________ associated with the lumière brothe

castortr0y [4]

The answer in the first space provided is realistic whereas the second space provided is fantastic. The correct answer would be letter B.

In realistic, it has many views in which the frame is the window on the world whereas fantastic depicts imagination or remotes from reality.

5 0

3 years ago

The motion of an object undergoing constant acceleration can be modeled by the kinematic equations. One such equation is xf=xi+v

Mademuasel [1]

Answer:

a = -04978 m / s²

Explanation:

For this exercise we can use the kinematics equations, as the initial speed, distance and time indicate, we can use

x = x₀ + v₀ t + 1 /2 a t²

½ a t² = x-x₀ - v₀ t

a = (x-x₀ - v₀ t) 2 / t²

let's reduce the magnitudes to the SI system

x₀ = 1000 mm = 1 m

x = 5000mm = 5m

let's calculate

a = (5 - 1 - 15 60) 2/60²

a = -04978 m / s²

negative sign indicates that braking is related

7 0

3 years ago