Which of the following statement about HTML DOM events is correct?A. Only functions can be used to handle events.B. The "click" event can be raise by elements other than buttonsC. Events are handled at the server side.D. Events are all raised by users' keyboard and mouse actions.
Answers
HTML DOM events are an important aspect of web development, as they enable interactivity and responsiveness to user actions.
The correct statement about HTML DOM events is B. The "click" event can be raised by elements other than buttons.
HTML DOM events are a way to handle user interactions with the webpage and trigger specific actions in response to those interactions. Events can be triggered by various sources, such as user actions, the browser, or the server.
Event handlers are functions that are called when an event is triggered, and they can be attached to HTML elements using JavaScript. While functions are commonly used to handle events, other methods such as objects or anonymous functions can also be used.
The "click" event is one of the most commonly used events, and it is raised when the user clicks on an HTML element. However, this event can be raised by elements other than buttons, such as links, images, and even plain text. Other types of events include keyboard events, form events, and window events, among others.
Events are not handled at the server side, as they occur in the client-side environment. However, server-side scripting languages like PHP or ASP can be used to generate HTML code that includes event handlers.
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Related Questions
What accident theory divides an accident into three phases: pre-contact, contact, and post-contact?
Answers
The accident theory divides an accident into three phases: pre-contact, contact, and post-contact is the domino theory.
What is the domino theory?The domino theory is a geopolitical theory that holds that changes in democracy in one country have a domino impact on surrounding countries.
The multiple-factor theory examines not just the three domino theory phases—precontact, contact, and post-contact—but also additional elements that influence an accident, such as management, machine, media, and man.
Therefore, the domino theory separates an accident into three phases: pre-contact, contact, and post-contact.
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For circuit shown, determine the total circuit current.
100 ΩξR,
R, S250 Ω
24 ν -
350 ΩξR,
R, 200 Ω
Answers
Answer:
I don't know the answer but you can download Ga u t h math to answer that
Explanation:
no spacing it is just can't lay aside
When one knows the true values x1 and x2 and has approximations X1 and X2 at hand, one can see where errors may arise. By viewing error as something to be added to an approximation to attain a true value, it follows that the error ei is related to Xi and xi as xi 5 Xi 1 ei (a) Show that the error in a sum X1 1 X2 is (x1 1 x2) 2 (X1 1 X2) 5 e1 1 e2 (b) Show that the error in a difference X1 2 X2 is (x1 2 x2) 2 (X1 2 X2) 5 e1 2 e2 (c) Show that the error in a product X1X2 is x1x2 2 X1X2 < X1X2 a e1 X1 1 e2 X2 b (d) Show that in a quotient X1yX2 the error is x1 x2 2 X1 X2 < X1 X2 a e1 X1 2 e2 X2 b
Answers
Answer:
(a) For the sum X1 + X2, we have:
X1 + X2 = (x1 + e1) + (x2 + e2)
= x1 + x2 + (e1 + e2)
The error in the sum is given by:
e1 + e2 = (x1 + e1) + (x2 + e2) - (x1 + x2)
= (x1 + x2) + (e1 + e2) - (x1 + x2)
= e1 + e2
Therefore, the error in the sum is e1 + e2, as required.
(b) For the difference X1 - X2, we have:
X1 - X2 = (x1 + e1) - (x2 + e2)
= x1 - x2 + (e1 - e2)
The error in the difference is given by:
e1 - e2 = (x1 + e1) - (x2 + e2) - (x1 - x2)
= (x1 - x2) + (e1 - e2) - (x1 + x2)
= e1 - e2
Therefore, the error in the difference is e1 - e2, as required.
(c) Show that the error in a product X1X2 is:
x1x2 - X1X2 ≈ (X1 * e2) + (X2 * e1)
Proof:
We start with the equation:
X1X2 = (x1 + e1)(x2 + e2)
Expanding the right side of the equation, we get:
X1X2 = x1x2 + x1e2 + x2e1 + e1e2
Subtracting x1x2 from both sides, we get:
x1x2 - X1X2 = x1e2 + x2e1 + e1e2
Since e1 and e2 are small compared to x1 and x2, we can ignore the e1e2 term. Therefore, we can approximate the error as:
x1x2 - X1X2 ≈ (X1 * e2) + (X2 * e1)
(d) Show that in a quotient X1 / X2, the error is:
(x1 / x2) - (X1 / X2) ≈ ((e1 * X2) - (e2 * X1)) / (X2)^2
Proof:
We start with the equation:
X1 / X2 = (x1 + e1) / (x2 + e2)
Expanding the right side of the equation, we get:
X1 / X2 = (x1 / x2) + (x1 * e2 - x2 * e1) / (x2)^2 + e1 / x2 - e2 * x1 / (x2)^2
Subtracting (x1 / x2) from both sides, we get:
(x1 / x2) - (X1 / X2) = (x1 * e2 - x2 * e1) / (x2)^2 + e1 / x2 - e2 * x1 / (x2)^2
Simplifying the expression, we get:
(x1 / x2) - (X1 / X2) ≈ ((e1 * X2) - (e2 * X1)) / (X2)^2
This is the error in the quotient.
Explanation:
what is meant when a metal is said to have good weldability
Answers
A metal has good weldability if it can be welded with ease, in good shape, and with minimal chance of flaws while preserving its characteristics and integrity after welding.
What is meant by good weldability?How quickly a metal can be welded is a measure of its weldability. The weld quality and ease of attainment are the determining factors in determining a metal's weldability. Because they are not sensitive to heat treatment, these alloys offer good weldability.
What is a good weldability requirement?To produce goods of such high quality, the fundamental requirements for welding quality include the following: The bead was unbroken and without holes. The bead has waves of the same height, breadth, and frequency.
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Who should inspect a crane?
1Employer
2Experience workers
3Foreman
4Competent person
Answers
Answer:
4. Competent person
Explanation:
A competent person should inspect the crane
OSHA regulations only require that such equipment be inspected during initial use and annually thereafter by a "competent person"
What size heater will be required to heat the water in a swimming pool from 70 degrees F to 72 degrees F in 1 hour if the appliance is 100% efficient and the pool holds 20,000 gallons of water?
Answers
A 176.19 kW heater would be required to heat the water in the pool from 70 degrees F to 72 degrees F in 1 hour, assuming the heater is 100% efficient.
How to find the power of the heaterTo calculate the size of the heater required to heat the water in the pool, we need to use the following formula:
Q = m x c x ΔT
where
Q is the amount of heat required,
m is the mass of the water being heated,
c is the specific heat of water, and
ΔT is the change in temperature.
First, we need to calculate the mass of the water in the pool.
One gallon of water weighs 3.79 kg hence 20 000 gallons will be 75 800 kg
Q = m x c x ΔT
Q = 75,800 kg x 4.184 J/g°C x (72°F - 70°F)
Q = 75,800 kg x 4.184 J/g°C x 2°F
Q = 634,294.4 joules
Now, we need to calculate the power of the heater required to deliver this amount of heat in 1 hour (3600 seconds):
Power = Q / t
Power = 634,294.4 joules / 3600 seconds
Power = 176.19 kW
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Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Answers
Nanopesticides. The world population keeps growing. ...
Enantio selective organocatalysis. ...
Solid-state batteries. ...
Flow Chemistry. ...
Porous material for Water Harvesting. ...
Directed evolution of selective enzymes. ...
From plastics to monomers. ...
An adiabatic piston-cylinder compressor has an efficiency of 85%. If air is compressed from 101 kPa and 25 o C to 1200 kPa. Determine the actual work done and the actual final temperature. g
Answers
Answer:
\(T_2=604.70K=331.55\°C\)
\(W=220.10\frac{J}{g}\)
Explanation:
Hello!
In this case, for this compression of air from 101 kPa to 1200 kPa, we should first realize that equation relating P and T is:
\(T_1*P_1^{\frac{1-\gamma}{\gamma} }=T_2*P_2^{\frac{1-\gamma}{\gamma} }\)
Whereas:
\(\gamma=\frac{Cp_{air}}{Cv_{air}} =\frac{1.00J/(g\°C)}{0.718J/(g\°C)}=1.40\)
That is why the final temperature is:
\(T_2=T_1(\frac{P_1}{P_2})^{\frac{1-\gamma}{\gamma} }\\\\T_2=298.15K(\frac{101kPa}{1200kPa})^{\frac{1-1.40}{1.40} }\\\\T_2=604.70K=331.55\°C\)
Moreover, for the work done, since the process is adiabatic, no heat is in the equation:
\(Q-W=\Delta U\)
But as the work is done on the system we can write:
\(-(-W)=\Delta U=Cv(T_2-T_1)\\\\W=0.718\frac{J}{g*K}(604.70K-298.15K)\\ \\W=220.10\frac{J}{g}\)
Best regards!
could you put your sparkplug in the steering wheel and it still works
A. no
B. yes
C. do not care
D. it really doesn't matter
Answers
Answer:
a
Explanation:
Find a negative feedback controller with at least two tunable gains that (1) results in zero steady state error when the input is a unit step (1/s). (and show why it works); (2) Gives a settling time of 4 seconds; (3) has 10% overshoot. Use the standard 2nd order approximation. Plot the step response of the system and compare the standard approximation with the plot.
Answers
Answer:
Gc(s) = \(\frac{0.1s + 0.28727}{s}\)
Explanation:
comparing the standard approximation with the plot attached we can tune the PI gains so that the desired response is obtained. this is because the time requirement of the setting is met while the %OS requirement is not achieved instead a 12% OS is seen from the plot.
attached is the detailed solution and the plot in Matlab
4. Oil system cleaning products should not use solvents because:
A) O Solvents smell bad
B) Solvents are completely removed during the service
CO Solvents have no impact on dirt and debris
DO Solvents can damage certain plastics and rubbers found in the engine
<< Previous Page
Next Pag
Answers
Answer:
Solvents can damage certain plastics and rubbers found in the engine
Explanation:
Vapor lock occurs when the gasoline is cooled and forms a gel, preventing fuel flow and
engine operation. TRUE or FALSE
Answers
Answer:
True
Explanation:
plumbing fixtures in a building have a minimum and maximum pressure requirement that is dictated by
Answers
Plumbing fixtures in a building typically have a minimum and maximum pressure requirement that is dictated by a variety of factors, including the type of fixture, the materials used in the plumbing system, and the water source supplying the building.
For example, fixtures like toilets and faucets typically require a minimum pressure of around 20 to 30 psi to function properly, while high-pressure appliances like washing machines may require up to 80 psi.
On the other hand, excessive water pressure can damage plumbing fixtures and cause leaks and other issues. As a result, building codes and regulations typically set a maximum allowable pressure for plumbing systems, which is typically around 80 psi.
To ensure that plumbing fixtures in a building operate within the appropriate pressure range, it is important to regularly test and maintain the plumbing system.
This may involve installing pressure regulators or reducing valves, as well as monitoring water pressure levels and making adjustments as needed.
Overall, understanding and managing water pressure in a building's plumbing system is crucial for ensuring the efficient operation of fixtures and preventing damage and other issues.
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Determine the moment of the 20-N force about the line AB. Use eqs. (4.5) and (4.6), letting the unit vector e point (a) from A toward B; (b) from B toward A.
Answers
(a) Unit vector e from A towards B is 121.81 Nm (b) Unit vector e from B towards A is -121.81 Nm.
Describe Force?Force is a physical quantity that describes the interaction between two objects or bodies. It is a vector quantity, which means that it has both magnitude and direction.
Force can cause an object to accelerate, change its shape, or deform. The unit of force in the International System of Units (SI) is the Newton (N), which is defined as the force required to accelerate a mass of one kilogram at a rate of one meter per second squared (1 N = 1 kg⋅m/s²).
According to question,
F= 20 N
Let 0 is point where F is acting
0= 7i + 4j+ 0k
A= 0i + 5j + 0k
B= -4i + 0j + 0k
Now, we have to find moment about line AB. So, we can take moment about any point on line AB. We will take Point A. So, moment about point A :
\(M_{A}= r_{A} * F Nm\\\)
\(r_{A}\)= 0 - A = 7i + 4j+ 0k- 0i + 5j + 0k
\(r_{A}\)= 7i- j+ 0k m
\(M_{A}\)= \(r_{A}\) × F= | i j k |
| 7 -1 0 |
| 0 0 20 |
= (0-0) k+ (-20-0)i + (0-140)j
\(M_{A}\)= -20i- 140j + 0k Nm
(a) Unit vector e from A towards B.
A= 5j (m) , B= -4i (m)
BA= B-A= -4i-5j
e= \(\frac{BA}{|BA|} =\frac{-4i-5j}{\sqrt{-4^{2} + (-5^{2}) } } =\frac{-4i-5j}{\sqrt{41} }\)
∴ Moment about line AB from A to B unit vector |M|=
\(e M_{A}= \frac{-4i-5j}{\sqrt{41} } . -20i-140j+0k\\ = \frac{4*20+5*140}{\sqrt{41} } [i.i=j.k=k.i=0]\\\)
|M|= 121.81 Nm
(b) Unit vector e from A towards B.
AB= A-B= 5j+4i (m)
e= \(\frac{AB}{|AB|} =\frac{4i+5j}{\sqrt{4^{2} + (5^{2}) } } =\frac{4i+5j}{\sqrt{41} }\)
∴ Moment about line AB from B to A unit vector |M|=
\(e M_{A}= \frac{4i+5j}{\sqrt{41} } . -20i-140j+0k\\ = \frac{-(4*20)+(-(5*140))}{\sqrt{41} } [i.i=j.k=k.i=0]\\\)
|M|= -121.81 Nm
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what does network interface subsystem do
Answers
Answer:
It takes a single interface and creates multiple virtual interfaces with different MAC addresses. Essentially, it enables the creation of independent logical devices over a single ethernet device – “many to one” relationship in contrast to a “one to many” relationship where you map a single NIC to multiple networks.
Explanation:
I hope this helps (sorry if im wrong, this is all i could find)
Many solderless connectors are color coded for the size of wire they are designd to work with. WHat size is indicated by the color blue?
Answers
Blue insulated connectors used for joining 1.1mm² – 2.5mm² cable sizes.
Green or green with a yellow stripe serves as the protective ground. The neutral wire is white, the hot single phase wires are black, and the second active wire is red. Red, black, and blue three-phase lines.
What is solderless connectors?Solderless connections are ideal when high reliability is not required. Such as components that must be unplugged or replaced on a regular basis or that you anticipate changing in the near future.
Connector tension A solderless device is one that makes a mechanical connection between two or more conductors or between one or more conductors and a terminal without the use of solder.
Solderless strip connectors are used to connect LED strip lights without using solder. They work by inserting the strip into the connectors below. The strip's contact pads slide beneath the connector's contact prongs, completing the electrical circuit.
Strip connectors without soldering do not form a permanent electrical connection with the strip light. While the clasp's teeth do an adequate job of holding the strip in place, movement is still possible - and if there is a lot of it, the contact pads are likely to move away from the contact prongs and lose connection.
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Tech A says that a mechanical pressure regulator exhausts excess fluid back to the transmission pan. Tech B says that if the transmission pan is removed, the magnet must be replaced. Who is correct?
Answers
Answer:
A
Explanation:
gasoline has a comparatively high btu per galloon rating around?
Answers
Answer:
116,090 Btus
Explanation:
what is the total resistance of a circuit that contains two 100 resistors connected. in parallel
Answers
The total resistance of a circuit that contains two 100 resistors connected in parallel is equal to 50 Ohms.
What is resistance?In Science, resistance can be defined as an opposition to the flow of current in an electric circuit. Additionally, the standard unit of measurement of the resistance of an electric component is Ohms, which can either be converted to kilo-ohms or mega-ohms.
Mathematically, the total equivalent resistance of two or more resistors in an electrical circuit that are connected in parallel is giving by this mathematical expression;
Rt = R₁R₂/R₁ or Rt = R/n
Where:
Rt represents the total equivalent resistance.R represents the resistors.Substituting the given parameters into the formula, we have;
Rt = 100/2
Rt = 50 Ohms.
In conclusion, the total equivalent resistance is equal to 50 Ohms.
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how does increasing or decreasing affect the fuel injector delivery of fuel
Answers
The fuel injectors are responsible for delivering the required amount of fuel into the combustion chamber. The injector's duration, which determines how long the injector stays open, is influenced by the engine's operating parameters, including the throttle position, engine speed, and the air/fuel ratio.
The injector pulse width can also be influenced by modifying the fuel pressure and injector resistance or impedances.The effect of increasing or decreasing the fuel injector delivery of fuel is as follows:How decreasing affects the fuel injector delivery of fuel?The fuel injector's flow rate is slowed by lowering the fuel pressure, reducing the injector's opening time (pulse width), or increasing the fuel temperature (which reduces its viscosity). However, if the fuel pressure is lowered too much, the injectors may not provide enough fuel to keep up with the engine's fuel needs. When fuel delivery is reduced by decreasing the fuel pressure, the air/fuel ratio becomes leaner, reducing power and may cause an engine stall.How increasing affects the fuel injector delivery of fuel?Raising the fuel pressure, extending the injector pulse width, or cooling the fuel (increasing its viscosity) increases the fuel injector's flow rate. When the fuel pressure is increased, the air/fuel ratio becomes richer, producing more power from the engine. However, if the fuel pressure is raised too much, it can cause fuel to leak from the injector and result in starting problems or a rich running engine.
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A counterflow heat exchanger operating at steady state has water entering as saturated vapor at 1 bar with a mass flow rate of 2 kg/s and exiting as saturated liquid at 1 bar. Air enters in a separate stream at 300 K, 1 bar and exits at 335 K witha negligible change in pressure. Heat transfer between the heat exchanger and its surroundings is negligible. Determine (a) the change in the flow exergy rate of each stream, in kW. (b) the rate of exergy destruction in the heat exchanger, in kW. Ignore the effects of motion and gravity. Let To 300 K,P) 1 bar.
Answers
Flow exergy rate = mass flow rate * (specific exergy + kinetic exergy + potential exergy)
Exergy destruction rate = (T_hot - T_cold) * (entropy generation rate)
where T_hot and T_cold are the hot and cold stream temperatures, respectively, and entropy generation rate can be calculated using the following equation:
Entropy generation rate = (heat transfer rate / T_hot) - (heat transfer rate / T_cold)
Given:
- Water enters at 1 bar as saturated vapor with a mass flow rate of 2 kg/s and exits as saturated liquid at 1 bar.
- Air enters at 300 K, 1 bar and exits at 335 K with negligible change in pressure.
- Heat transfer between the heat exchanger and its surroundings is negligible.
Assumptions:
- Negligible effects of motion and gravity.
- Negligible changes in kinetic and potential energy.
(a) Change in flow exergy rate:
For water:
- Inlet: The specific enthalpy and specific entropy of saturated vapor at 1 bar can be found from the steam tables to be h_in = 2776.1 kJ/kg and s_in = 7.3607 kJ/(kg*K), respectively. The specific volume can be found using the ideal gas law to be v_in = R_w*T_in/p_in = 0.2968 m^3/kg, where R_w is the specific gas constant for water vapor.
- Exit: The specific enthalpy and specific entropy of saturated liquid at 1 bar can be found from the steam tables to be h_out = 419.06 kJ/kg and s_out = 1.3043 kJ/(kg*K), respectively. The specific volume can be found using the tables to be v_out = 0.001043 m^3/kg.
- Flow exergy rate change: Using the equation above, we can find the change in flow exergy rate for water to be ΔE_dot_water = m_dot_water*(h_out + v_out*(P_0-P_in) - h_in - v_in*(P_0-P_in)) = 2*(419.06 + 0.001043*(1-1)*(10^5-1) - 2776.1 - 0.2968*(1-1)*(10^5-1)) = -5284.8 kW, where P_0 is the reference pressure of 1 bar.
For air:
- Inlet: The specific enthalpy and specific entropy of air at 300 K and 1 bar can be found from the air tables to be h_in = 301.27 kJ/kg and s_in = 1.9745 kJ/(kg*K), respectively. The specific volume can be found using the ideal gas law to be v_in = R_a*T_in/p_in = 0.8251 m^3/kg, where R_a is the specific gas constant for air.
- Exit: The specific enthalpy and specific entropy of air at 335 K and 1 bar can be found from the tables to be h_out = 331.46 kJ/kg and s_out = 2.1619 kJ/(kg*K), respectively. The specific volume can be found using the ideal gas law to be v_out = 0.9076 m^3/kg.
- Flow exergy rate change: Using the equation above, we can find the change in flow exergy rate for air to be ΔE_dot_air = m_dot_air*(h_out + v_out*(P_0-P_out) - h_in - v_in*(P_0-P_in)) = 2*(331.46 + 0.9076*(1-1)*(10^5-1) - 301.27 - 0.8251*(1-1)*(10^5-1)) = 618.5 kW, where P_out is the pressure at the exit of the heat exchanger.
Therefore, the change in flow exergy rate is -5284.8 kW for water and 618.5 kW for air.
(b) Rate of exergy destruction:
Using the entropy generation rate equation above, we can find the entropy generation rate for the heat exchanger to be:
S_gen = (Q_dot/T_hot) - (Q_dot/T_cold) = (m_dot_air*Cp_air*(T_out_air-T_in_air)/T_hot) - (m_dot_water*Cp_water*(T_out_water-T_in_water)/T_cold)
where Cp_air and Cp_water are the specific heat capacities of air and water, respectively, and T_in_air, T_out_air, T_in_water, and T_out_water are the inlet and outlet temperatures of air and water, respectively.
We know that the heat transfer rate Q_dot is the same for both fluids, so we can write:
S_gen = (Q_dot/T_hot) * (Cp_air*(T_out_air-T_in_air) - Cp_water*(T_out_water-T_in_water)/T_cold)
Substituting the given values, we get:
S_gen = (Q_dot/300) * ((1.005*(335-300)) - (4.179*(100-0)) / 373)
S_gen = 0.0145*Q_dot
where Cp_air = 1.005 kJ/(kg*K), Cp_water = 4.179 kJ/(kg*K), T_hot = 300 K, T_cold = 373 K, and Q_dot is the heat transfer rate.
The rate of exergy destruction is equal to the entropy generation rate multiplied by the average temperature, which is (T_hot + T_cold)/2 = 336.5 K, so we have:
ΔE_dot_dest = S_gen*(T_hot + T_cold)/2 = 0.0145*Q_dot*336.5
Substituting the given values, we get:
ΔE_dot_dest = 0.0145*Q_dot*336.5 = 0.0145*Q_dot*336.5 = 63.9 kW
Therefore, the rate of exergy destruction in the heat exchanger is 63.9 kW.
Why is sand used as a bed for melting of metal in Cupola furnace?
Answers
Answer:
A sand bed is necessary because it provides a refractory bottom for molten metal
:]
Before making a left or right turn, you should signal for at least
Answers
An open tank has a bulge in its vertical slide that is semicurcular in shape. Determine the horiztonal and vertical components of the force that the water exerts on the bulge
Answers
The horizontal and vertical components of the force that the water exerts on the bulge are 642.936 lb and 141.145 lb
How to solve for the components of the forceThe radius of the bulge is given as 1.2 ft
Length of the bulge is 1 ft
The projected area of the bulge is 2RL
= 2 x 1.2 x 1
= 2.4 ft²
We have to find the horizontal components of the force
Hc = 3.1 + 1.2 = 4.3 ft
fH = 62.3 x 4.3 x 2.4
= 642.936 lb
Hence the horizontal components of the force is 642.936 lb
How to find the vertical component of force
Fv = 62.4 x (π x 1.2²/2) x 1
= 62.4 x 2.26285 x 1
= 141.145 lb
Hence the vertical component of the force is 141.145 lb
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This type of burn occurs when electrical current flows through tissues or bone, generating heat, and causing damage.
Answers
Electrical burns are among the most severe burns and require immediate medical attention.
They transpire when electric current flows through tissues or bone, generating heat that compels tissue damage.
Arc or flash burns result from high temperatures caused by an electric arc or eruption near the body.
What is the reflex response that happens when electrical current passes via the human body?
Electric shock
Electric shock is a reflex response possibly affecting trauma which occurs when an electrical current passes over or through a worker's body. It usually concerns burns and abnormal heart rhythm and blackout.
What are the 3 types of burns that are generated by exposure to electricity?
The most common shock-related, nonfatal damage is a burn. Burns caused by electricity may be of three types: electrical burns, arc burns, and thermal contact burns. Electrical burns can result when a person feels electrical wiring or equipment that is used or carried improperly.
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What project is this ?
Answers
Answer:
a building project...
Explanation:
A jackhammer uses pressurize gas to change it forced to the hammer what type of mechanical system is it a jackhammer it uses in the principle of a blank system to transmit force
Answers
Consider a system with a single light (can be on or off) that can be controlled by any one of three switches. On switch is the master on/off switch. If it is down, the light is off. When the master switch is up, the light will be on iff both the other switches are up.a. Write a Boolean function (let’s call it F) for this circuitb. Write a truth table for F.c. Draw a circuit diagram to show how F could be implemented with AND, OR, and NOT gates.
Answers
Answer:
Explanation:
Hi sorry I'm new and need points ty
A 50 mm 45 mm 20 mm cell phone charger has a surface temperature of Ts 33 C when plugged into an electrical wall outlet but not in use. The surface of the charger is of emissivity 0.92 and is subject to a free convection heat transfer coefficient of h 4.5 W/m2 K. The room air and wall temperatures are T 22 C and Tsur 20 C, respectively. If electricity costs C $0.18/kW h, determine the daily cost of leaving the charger plugged in when not in use.
Answers
Answer:
C = $0.0032 per day
Explanation:
We are given;
Dimension of cell phone; 50 mm × 45 mm × 20 mm
Temperature of charger; T1 = 33°C = 306K
Emissivity; ε = 0.92
convection heat transfer coefficient; h = 4.5 W/m².K
Room air temperature; T∞ = 22°C = 295K
Wall temperature; T2 = 20°C = 293 K
Cost of electricity; C = $0.18/kW.h
Chargers are usually in the form of a cuboid, and thus, surface Area is;
A = (50 × 45) + 2(50 × 20) + 2(45 × 20)
A = 6050 mm²
A = 6.05 × 10^(-3) m²
Formula for total heat transfer rate is;
E_t = hA(T1 - T∞) + εσA((T1)⁴ - (T2)⁴)
Where σ is Stefan Boltzmann constant with a value of; σ = 5.67 × 10^(-8) W/m².K⁴
Thus;
E_t = 4.5 × 6.05 × 10^(-3) (306 - 295) + (0.92 × 6.05 × 10^(-3) × 5.67 × 10^(-8)(306^(4) - 293^(4)))
E_t = 0.7406 W = 0.7406 × 10^(-3) KW
Now, we know C = $0.18/kW.h
Thus daily cost which has 24 hours gives;
C = 0.18 × 0.7406 × 10^(-3) × 24
C = $0.0032 per day
Raul doesn’t feel like he needs to write down events that will happen months from now. Explain to him why it is important to use the different types of calendars.
Answers
Answer: Calendars are important so that; Students know what’s coming up. Adequate time is planned for important events and studying different levels of detail are accounted for students may be organized and prepared for anything.
Explanation:
The reason why it is important for Raul to use the different types of calendars is; So that he can know what is coming up
Calendars are documents that contain dates of all days in a year as classified by that specific calendar.
The most common calendar system types in the world today are Gregorian, Islamic and Chinese. Now, regardless of the type of calendar being used, the one common factor with all of them is that they assist everyone including students to know the events that are coming up.
In conclusion the reason why it is important for Raul to use the different types of calendars is So that he can know what is coming up
Read more on calendars at; https://brainly.com/question/7353753