Answer:
Power rating of heater=1.5kw
Current taken from the supply=6A
Explanation:
Power(P)=Energy/Time
Where, electrical energy=3.6*10^6J and Time=40mins=40*60s
P=3.6*10^6J/40*60s
P=1500J/s or 1500watts
P=1.5kw
Current supply:
P=VI
Where, power(P)=1500watts,Voltage supply (V)=250volts, and current(I)=?
Making current (I) the subject of the formula :
I=P/V
I=1500watts/250volts=6A
Therefore, current taken from the supply is 6A.
The power rating of the heater is 1500 Watts and it takes a current of 6 Amps from the supply.
Explanation:The power of an electrical appliance like a heater can be calculated using the formula Power (P) = Energy (E) / Time (T), where Power is in Watts, Energy is in Joules, and Time is in seconds. Your heater consumes 3.6 Megajoules (MJ) in 40 minutes. Converting these to the units we require, we get 3,600,000 Joules and 2400 seconds.
P = E / T = 3,600,000 J / 2,400 s = 1500 Watts
Now about the current consumption, we can use the formula Current (I) = Power (P) / Voltage (V), where Current is in Amps and Voltage is in Volts. Given that the heater is connected to a 250V supply,
I = P/V = 1500W / 250V = 6 Amps
So, the power rating of the heater is 1500W, and it takes 6A from the supply.
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The phrase "positive to positive, negative to ground" is correct when jump starting a car.
A) TrueB) False
The correct answer is A; True.
Further Explanation:
This is a correct phrase that is important to learn when owning any type of vehicle. When a car battery is dead, it can usually be jump started by using another cars battery or a portable battery charger. It is extremely important to put the positive battery cable on the positive battery post. Then the negative cable will be placed on the negative car battery post and the negative ground wire can be anywhere on the car except on the battery.
The car needs to be connected properly for a few minutes before trying to start the car. This helps the car battery to get enough "juice" to start. If the battery cables are placed wrong this can cause sparks to come out of the cables/battery and cause bodily harm.
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determine the force magnitude p required to lift one end of the 250-kg crate with the lever dolly.
Answer:
224.8125 N
Explanation:
Using the attached diagram, then we can work the answer as follows
Taking moments about 275 mm from point A
[tex]P\times 1500=\frac {mg}{2}\times 275mm[/tex]
Where m is the mass, P is the load, g is acceleration due to gravity
[tex]P=\frac {250\times 9.81\times 275mm}{2\times 1500mm}=224.8125 N[/tex]
What’s a trade off? What is one trade-off that the New Balance management makes?
Answer:
A trade-off is a decision to give up one quality to gain another quality. New Balance never lays off employees, but it costs.
Explanation:
The table represents the function f(x). A 2-column table with 7 rows. The first column is labeled x with entries negative 3, negative 2, negative 1, 0, 1, 2, 3. The second column is labeled f of x with entries negative 9, negative 6, negative 3, 0, 3, 6, 9. What is f(3)? –9 –1 1 9
Answer:
f3=9
Explanation:
Note where the above parameters are given, that the function value of f(3) is 9.
The table that shows the function valuesThe table is given as follows:
x | f(x)
------------
-3 | -9
-2 | -6
-1 | -3
0 | 0
1 | 3
2 | 6
3 | 9
Function values are the results obtained by applying a mathematical function to specific input values, known as the domain. Each input value is associated with a corresponding output value, which is the result of the function's computation.
These values illustrate how the function transforms its inputs into specific outputs.
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can i join three 12 volts batteriesto give me 24 volts output
Answer:
YES
Explanation:
If we connect batteries in series then the output voltage is the sum of the individual voltage of each battery i.e if you connect three 12 volts batteries in series then their output voltage will be 12+12+12=36 volts, but the current rating of the batteries in series will be same of the individual battery rating in 'mah'.
But when we connect the batteries in parallel their voltage is not added but their current rating in mah is addition of their individual rating.
So, If you want 24 volts from three 12 volts battery then you can connect two of them in series and the other one in parallel with them this will give 24 volts and the current will be addition of the two series batteries and the third which is in parallel with them. You can use this configuration if current value is not a big factor.
What is the average speed of a car that travels 80km in 1.5 hours
Answer:53.33km/hr.
Explanation:
Average speed =
distance traveled/time taken
Average speed =80km/1.5hr=53.33km/hrs
Answer: 53.33 km/hour
Average speed = total distance covered / total time taken.
Explanation:
Given total distance covered by the car = 80 Km
Total time taken to cover the given distance= 1.5 hours
Average speed = 80 km/1.5 hours = 53.33 km/hour
The movement of particles from areas of high concentration to areas of low concentration is called?
Answer:Diffusion
Explanation:
Diffusion is the movement of anything from a region of higher concentration to a region of lower concentration. It is actually driven by a gradient in concentration. For example, if you fart at one end of a room eventually the gas particles will be all over the room.
A local reaction is when a chemical enters the bloodstream?
false because skin contact with a chemical may result in a local reaction, such as a burn or rash, or absorption into the bloodstream. Absorption into the bloodstream may then allow the chemical to cause toxic effects on other parts of the body.
False
Local reactions can be described as a type of reaction that affects the surface of the skin. These different reactions can be in the form of skin rashes, boils, pimples and so on.
These local reactions can originate through eating foods that are not accepted or allergic to the body. Also, these reactions can come from body creams that can cause a bad reaction to the skin.
The can also come from a prescribed drug that is not suitable in the body. Hence the reason why we should know what food, cream or drug is good for the body.
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Each cell of an auto mobile 12 V battery can produce about how many volts?
Answer:
Each cell produces 1 volt and all 12 cells make up 12 V which is the total of the 12 volt battery
Explanation:
Which ocean has the greatest average depth? A. Atlantic B. Arctic C. Indian D. Pacific
Answer: Pacific ocean has the greatest average depth and its mean depth is 4,000 meters (13,000 feet).
The ocean that has the greatest average depth is the pacific ocean. Therefore, option D is correct.
The Pacific Ocean is the largest and deepest of the Earth's five major oceans. It is located between the eastern coastlines of Asia and the western coastlines of the Americas. It is spread over a vast area of approximately 63 million square miles (165 million square kilometers).
This Ocean is known for its intense volcanic and seismic activity. It contains the "Ring of Fire." The Pacific Ocean is home to various islands, including Hawaii, the Galapagos Islands, Tahiti, Fiji, and the Philippines.
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the pressure of a car can be adjusted using what
Answer:
tyre pressure monitoring system (TPMS)
Explanation:
It very important to inflate your tyres to the specified pressure. So cultivate a habit to check and refill them once a month. Note that you can't tell if a tyre is underinflated just by looking at it. If it actually looks underinflated in a way. And you can't really rely on a tyre pressure monitoring system (TPMS) only to keep track. Most systems only warn you when the pressure is 25 percent below the manufacturer's recommended tyre pressure.
Looookkk at diiiiiiiisssss
Answer:
Omggggggghgggggg...
Answer:
Dude that's so cool.
Explanation:
It's pretty cool, you should mark me brainliest