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Sergeu [11.5K]
4 years ago
9

Incident energy is defined as the amount of thermal energy impressed on a surface, at a certain distance from the source, genera

ted during an electrical arc event. One of the units used to measure incident energy is ? .
Physics
1 answer:
nignag [31]4 years ago
3 0

Answer: One of the units used to measure incident energy is calories per centimeter squared (cal/cm2).

Explanation: Incident energy this is defined as the amount of thermal energy impressed on a surface, at a certain distance from the source, generated during an electrical arc event.

The working distance is the distance from where the worker stands to the source location. The most common distance for which incident energy has been determined in tests is 18 inches.

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A 6cm diameter horizontal pipe gradually narrows to 4cm.
Rom4ik [11]

Answer:Q=0.5612 m^3/s

Explanation:

Given

diameter of pipe(d_1)=6 cm

diameter of pipe(d_2)=4 cm

P_1=32 kPa

P_2=24 kPa

A_1=\frac{\pi }{4}6^2=9\pi cm^2

A_2=\frac{\pi }{4}4^2=4\pi cm^2

v_1=\frac{Q}{A_1}

Applying bernoulli's equation

\frac{P_1}{\rho g}+\frac{v^2_1}{2g}+z_1=\frac{P_2}{\rho g}+\frac{v^2_2}{2g}+z_2

\frac{P_1}{\rho g}+\frac{\frac{Q^2}{A_1^2}}{2g}+z_1=\frac{P_2}{\rho g}+\frac{\frac{Q^2}{A_2^2}}{2g}+z_2

since z_1=z_2

\frac{32\times 10^3}{10^3\times 9.81}+\frac{Q^2}{2A_1^2g}=\frac{24\times 10^3}{10^3\times 9.81}+\frac{Q^2}{2A_2^2g}

Q^2=\frac{8\times 2\times 81\pi ^2\times 16\pi ^2\times 10^{-4}}{65\pi ^2}

Q^2=3149.3722\times 10^{-4}

Q=\sqrt{3149.3722\times 10^{-4}}

Q=0.5612 m^3/s

4 0
3 years ago
A night lamp uses a 30 W bulb. If it is left on continuously for 8 hours, how much energy will it use?
den301095 [7]

Answer:

Explanation:

30W * 8 h = 240 Wh = 0.240 kWh

6 0
4 years ago
Read 2 more answers
If mass of gold is 123.4g and its volume is 12.1cm cube, calculate its density
maxonik [38]

Answer:

10.198 g/cm³

Explanation:

ρ=m/V=123.4/12.1=10.198 g/cm³

3 0
3 years ago
What happens when the thermal energy of a substance increases?
lawyer [7]

Answer: What happens when the thermal energy of a substance increases is that D. Both the motion of the particles in the substance and the temperature of the substance increase.

Explanation: When thermal energy increases, it is due to particles moving faster. It also results in higher temperatures or heat.

5 0
4 years ago
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Two double bonds means that the total number of electrons being shared in the molecule is
torisob [31]

One double bond consists 4 electrons, so 2 double bonds means 8 electrons

7 0
4 years ago
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