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sammy [17]
3 years ago
13

The illuminance On a surface is six lux and the surface is 4 meters from the light source what is the intensity of the source

Physics
1 answer:
Liula [17]3 years ago
5 0

Answer : 96 candelas

Explanation : Luminous intensity is a quantity of light that is emitted by a light source with a solid angle in a particular direction.

We know the formula of luminous intensity

Luminous intensity = illuminance x distance from light source

L_{v} = E_{v}\times d^{2}

L_{v} = 6\times 16\ candelas

L_{v} = 96\ candelas

So, the intensity of the source will be 96 candelas.


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Answer:

h = 36.4 cm

Explanation:

given,

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mass of the child = 44 kg

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by energy of conservation

K.E_i +P.E_i= K.E_f + P.E_f

\dfrac{1}{2}kx^2 = mgh

\dfrac{1}{2}\times 2.5 \times 10^4 \times 0.112^2 = 44\times 9.8 \times h

\dfrac{1}{2}\times 2.5 \times 10^4 \times 0.112^2 = 44\times 9.8 \times h

156.8 = 44 \times 9.8 \times h

h = \dfrac{156.8}{44 \times 9.8}

h = 0.364 m

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2 years ago
The nuclear fuel distribution in a nuclear reactor is chosen so that when in operation the wall temperature of the reactor is a
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3 years ago
True or False: pH is a measure of how acidic or basic a solution is.
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Explanation:

True

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1. Impulse is the product of force and distance. True or false?
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Answer:

Explanation:

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   statement 2 is false.

3. Joule is equal to Newton times meter.

    Statement 3 is false.

4. Work done to lift an object is correct statement.

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5. Kinetic energy of an object is due to motion.

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6. Stopping distance is directly proportional to the square of velocity.

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3 years ago
Given a force of 100 N and a acceleration of 5 m/s, what is the mass
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