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3 years ago

Food deteriorated more slowly in a refrigerator because

Physics

1 answer:

REY [17]3 years ago

6 0

Because the low temperature in the refrigerator slows the action of bacteria and fungi on food substances.

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In which medium does sound travel the fastest?

Vikki [24]

1. D - sound travels the fastest through solids

2. 50 mm/s - v=fa

3. B - only process that involves changing waves

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3 years ago

A monk is sitting atop a mountain in complete rest in meditation. What is the kinetic Energy of the monk? (assume mass of 65 kg

Genrish500 [490]

Answer:

no kinetic energy

hope this helps! :-D

Explanation:

the monk is not moving

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3 years ago

A boy weighs 50 kg and is running with 225 J of energy, what is his velocity?

Oksanka [162]

0.22

Explanation:

50 ÷ 225 = 0.22

<u>#CarryOnLearning</u>

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3 years ago

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A transformer connected to a 120-v(rms) at line is to supply 13,000V(rms) for a neon sign.

lyudmila [28]

Answer:

(a) 108

(b) 110.500 kW

Solution:

As per the question:

Voltage at primary, $V_{p} = 120\ V$ (rms voltage)

Voltage at secondary, $V_{s} = 13000\ V$ (rms voltage)

Current in the secondary, $I_{s} = 8.50\ mA$

Now,

(a) The ratio of secondary to primary turns is given by the relation:

$\frac{N_{s}}{N_{p}} = \frac{V_{s}}{V_{s}}$

where

$N_{p}$ = No. of turns in primary

$N_{s}$ = No. of turns in secondary

$\frac{N_{s}}{N_{p}} = \frac{13000}{120}$ ≈ 108

(b) The power supplied to the line is given by:

Power, P = $V_{s}I_{s} = 13000\times 8.50 = 110.500\ kW$

$\frac{V_{s}}{V_{p}} = \frac{I_{p}}{I_{s}}$

$\frac{13000}{120} = \frac{I_{p}}{8.50}$

$I_{p} = \frac{13000}{120}\times 8.50 = 920.84\ A$

6 0

3 years ago

A wave oscillates 50 times per second. What is its frequency?

Advocard [28]

"per second" is exactly the definition of "Hertz".

50 per second is 50 Hz. (B)

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3 years ago

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