All categories

3 years ago

What is the resistance of a bulb of 4owconnected in a line of 220v?2

Physics

1 answer:

inn [45]3 years ago

8 0

Answer:

1210 ohm

Explanation:

Given :

P=40 W

V=220 V

Now,

$P=\frac{V^{2} }{R} \\40=\frac{(220)^{2} }{R} \\40R=48400\\R=\frac{48400}{40} \\R=1210 ohm$

Therefore, resistance of bulb will be 1210 ohm

You might be interested in

Analyze the chemical reaction below

34kurt

Answer:

Please find the answer in the explanation.

Explanation:

Given that 16 g CH4 + 64 g 02 - 44 g CO2 + 36g H2O

To explain the law of conservation of mass and describe how the equation represents the law of conservation of mass, let me first start from law.

The law state that: mass can neither be created nor destroyed.

The mass of each element at the reaction side must be equal or the Same with the magnitude of mass at the product

The equation represents the law of conservation of mass because the mass of molecules at the right hand side is equal to or balance with the molecules at the left hand side. For example, the number of Oxygen, and othe elements are the at both side.

6 0

3 years ago

A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs

nirvana33 [79]

The speed of the car at the top of the hill is 14m/s

Explanation:

given that

Initial velocity u of the car=0 m/s

The distance can be determined by finding out the difference between the elevation of the first slope and second slope.

elevation of the first slope=26 m

elevation of second slope=16m

distance s=26-16=10 m

acceleration due to gravity g=9.8 m/s2

speed of the car at the top of the hill can be determined by using the equation

$v^2=u^2+2as\\v^2=0^2+2\times 9.8\times 10\\=196\\v=\sqrt{196} =14m/s$

speed of the car at the top of the hill is 14m/s

5 0

3 years ago

Why is photosynthesis essential for plant homeostasis?

aalyn [17]

It should be answer choice b

6 0

3 years ago

Read 2 more answers

Using the data provided in the graph and the table, interpolate to find the potential energy (U) at a height (H) of 2.5 meters a

Assoli18 [71]

Science questions require you to calculate values without ... Calculation questions require you to find a specific value based on the figures provided. ... would happen past the edges of the graph or between values on a table. ... at 75 m, this gap in data is what makes this aninterpolation question!

3 0

3 years ago

Read 2 more answers

In part (a), suppose that the box weighs 128 pounds, that the angle of inclination of the plane is θ = 30°, that the coefficient

morpeh [17]

Answer:

v(t) = 21.3t

v(t) = 5.3t

$v(t) = 48 -48 e ^{ \frac{t}{9}}$