The voltage drop across an LED is 2 Volts. It is connected to a 5 volt power supply with a resistor, as shown. What resistor value should be used to set the LED current to 4 mA?

Answer:

As the x-values go to negative infinity, the function’s values go to positive infinity.

Explanation:

if the ans choices are:

As the x-values go to negative infinity, the function’s values go to negative infinity.

As the x-values go to negative infinity, the function’s values go to positive infinity.

As the x-values go to positive infinity, the function’s values go to negative infinity.

As the x-values go to positive infinity, the function’s values go to zero.

the ans is the 2nd choice

Answer:

It's B: As the x-values go to negative infinity, the function’s values go to positive infinity.

Answer:

A = 600 cm²

Explanation:

The surface area of a cuboid is given by :

A = 2(lb+bh+hl)

Here, l = b c = 10 cm

Put all the values,

A = 2[10(10)+10(10)+10(10)]

= 2(100+100+100)

= 2(300)

= 600 cm²

So, the surface area of the box is equal to 600 cm².

Answer:

If it is rechargable, there should be instructions on it, but I believe you can recycle it. For single use batteries, they need to be put into a safe location as they can actually explode sometimes, and acid leaks can also occur.

Normally, you can use put something like electrical tape or a nonconductive material on top of both of the battery nodes and you can just toss it into a trash can.  

Explanation:

Answer:

A roller coaster does not have an engine to generate energy. This builds up a supply of potential energy that will be used to go down the hill as the train is pulled by gravity. Then all of that stored energy is released as kinetic energy which is what will get the train to go up the next hill.

Explanation:

Answer:

4 number answer is correct.

Answer:

Explanation: It becomes smaller as the small particles leaves the ballon

Answer:

Supercharger works through a pair of rotors that blow air at a high speed into the intake port. As the port then contains a greater quantity of air, it becomes compressed. This enables a higher quantity of fuel to be injected into the combustion chamber, thus generating higher power.

Explanation:

HOPE THIS HELPS :)

Ekkkkk, hello  q(≧▽≦q)

Answer:

Consumers can buy goods and services on the internet.

Competition between companies has led to new products.

Explanation:

Answer:

(E) (F) aka

Explanation:

got it right on edge

Answer:

Answer:

[tex]here \: is \: the \: answer \: [/tex]

Explanation

A biosphere is the regions of the surface and atmosphere of the earth or another planet occupied by living organisms.

Answer:

A because i know thats it

Answer:

3. A team designs an arid-zone shade structure from political campaign sign

Answer:

The right solution is "28.45%".

Explanation:

The given values are:

[tex]P_4=50\ kPa[/tex]

[tex]h_4=0.7(2304.7)+340.5[/tex]

    [tex]=1953.83 \ KJ/Kg[/tex]

and,

[tex]P_3=15 \ mPa[/tex]

[tex]h_3=hg[/tex]

    [tex]=2610.8 \ KJ/Kg[/tex]

[tex]s_3=sg[/tex]

    [tex]=5.3108 \ KJ/Kgh[/tex]

At 45,

⇒ [tex]x_{45} = \frac{5.3108-1.0912}{6.5019}[/tex]

          [tex]=0.66[/tex]

At [tex]P_4=50 \ Kpa[/tex],

[tex]h_f=340.54[/tex]

or,

[tex]V_f=0.001030 \ m^3/Kg[/tex]

then,

⇒ [tex]h_2=340.54+0.001030(15\times 10^{3}-50)[/tex]

        [tex]=355.94 \ kJ/kg[/tex]

hence,

The isentropic efficiency of turbine will be:

⇒ [tex]n_T=\frac{h_3-h_4}{h_3-h_{45}}[/tex]

         [tex]=\frac{2610.8-1953.83}{2610.8-1836.26}[/tex]

         [tex]=84.818[/tex] (%)

The thermal efficiency of cycle will be:

⇒ [tex]n_C=\frac{W_T-W_P}{2_{in}}[/tex]

         [tex]=\frac{(2610.8-1953-83)-(355.93-340.54)}{2610.8-355.93}[/tex]

         [tex]=28.45[/tex] (%)  

The isentropic efficiency of the turbine is; η_t = 76.35%

The thermal efficiency of the cycle is; η_th = 27.08%

We are given;

P₃ = 15 mPa

P₄ = 125 kPa

At P₃ = 15 mPa = 15000 kPa, from the first table attached, we have;

Enthalpy of saturation vapour; h_g = h₃ = 2610.8 kJ/kg

Entropy of saturation vapour; s_g = s₃ = 5.3108 kJ/kg.k

Similarly, At P₄ = 125 kPa, from the second table attached, we have;

Enthalpy of evaporation; h_fg = 2240.6 kJ/kg

Enthalpy of saturation; h_f = 444.36 kJ/kg

Entropy of saturation; s_f = s₄ = 1.3741

Specific volume; v_f = 0.001048 m³/kg

Since the the steam quality at the outlet of the turbine to be 70 percent, then;

h₄ = 0.7h_fg + h_f

h₄ = 0.7(2240.6) + 444.36

h₄ = 2012.78 kJ/kg

Formula for the quality of the steam is;

x,₄₋₅  = (s₃ - s₄)/(s₃ + s₄)

x,₄₋₅  = (5.3108 - 1.3741)/(5.3108 + 1.3741)

x,₄₋₅ = 0.5889

Formula for h₂ is;

h₂ = h_f + V_f(P₃ - P₄)

h₂ = 444.36 + 0.001048(15000 - 125)

h₂ = 459.959 kJ/kg

Formula for Isentropic efficiency is;

η_t = (2610.8 - 2012.78)/(2610.8 - (0.7*2610.8))

η_t = 0.7635

η_t = 76.35%

Formula for thermal efficiency here is;

η_th = [(h₃ - h₄) - (h₂ - h_f)]/(h₃ - h₂)

η_th = [(2610.8 - 2012.78) - (459.959 - 444.36)]/(2610.8 - 459.959)

η_th = 0.2708

η_th = 27.08%

Read more about Rankine cycle at; https://brainly.com/question/14894227

Answer:

when you're going to need a designer a builder an electrical builder and a mechanic and you're going to need to be careful with what you use for all those things but the bike need to build you'll need a structure

Answer:

Building technology

Explanation:

Engineer recognize the danger of not wearing the seat belt and decided to put pressure on the government to enact laws mandating their use is explaining how the government regulations guided the development of the seat belt technology. Hence, option D is correct.

Active seatbelt systems have a motor that, in dangerous situations, pulls the seat belt webbing out of the way before a collision occurs. Data from active safety systems, such as the Electronic Stability Control or Brake Assist systems, can be used to activate an active seat belt.

A seatbelt is made up of a retractor and a belt made of flexible webbing. The retractor is composed of a spool around which the belt winds and a spring attached to the spool to maintain the webbing taut. It is often housed in a plastic box over the passenger's outer shoulder.

Lap belts, sash belts, automated seat belts, three-point belts, belt-in-seat (BIS), five-point harnesses, and six-point harnesses are a few of the most popular styles of seat belts.

Thus, option D is correct.

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https://brainly.com/question/19522837

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Answer:

Chinese or French .... l think

The cells and tissue of the endocrine system release hormones to help maintain homeostasis in the body.

The complex network of glands and organs that makes up the endocrine system secretes hormones—chemical messengers—directly into the bloodstream. The hormones then travel through the bloodstream to their target cells, where they must act.

The hormone-producing glands may or may not be nearby the target cells. The nervous system and endocrine system collaborate to start or stop movement and physiological function.

A body's homeostasis is maintained by a negative feedback mechanism (activation of one component does not activate the other). All body systems must be in a condition of balance for the body to survive and work properly.

Therefore, to support the body's homeostasis, the cells, and tissues of the endocrine system release hormones.

To learn more about the endocrine system, refer to the link:

https://brainly.com/question/29139873

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Answer:

just mmm Ghana GH dot-com we are the inside we are still living

yes idea come on we are going to grow up

Answer:

The turbocharger on a car applies a very similar principle to a piston engine. It uses the exhaust gas to drive a turbine. This spins an air compressor that pushes extra air (and oxygen) into the cylinders, allowing them to burn more fuel each second

Explanation:

Answer:

The turbocharger on a car applies a very similar principle to a piston engine. It uses the exhaust gas to drive a turbine. This spins an air compressor that pushes extra air (and oxygen) into the cylinders, allowing them to burn more fuel each second.

Explanation:

Answer:

Plants convert _____Light______ energy from the sun to _____Chemical _____energy (photosynthesis)

Explanation:

Do u want an explanation?

Answer:

Car drivers and front seat passengers must wear a seat belt, unless they have a medical exemption certificate. Adults travelling in the rear of a car must also use seatbelts, if they're fitted. It's the responsibility of the adult passenger (not the driver) to make sure that they are using the seatbelt.