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OLga [1]
1 year ago
13

A car owner forgets to turn off the headlights of his car while it is parked in his garage. If the 12.0-V battery in his car is

rated at 90.0 (A.h) and each headlight requires 36.0 W of power, how long will it take the battery to completely discharge?
Physics
1 answer:
Bogdan [553]1 year ago
7 0

It will take the battery 15 hours to discharge completely.

<h3>Energy stored in a battery</h3>

Energy is defined as the ability or capacity to work. The formula for calculating the energy stored in a battery is expressed as;

Energy stored=Power×Time

Energy stored = ΔV  * t  

where

ΔV is the change in velocity

t is the time

Substitute

Energy stored = 12.0 * 90.0

Energy stored = 1080 W.h

Total power consumed by the headlight = 2 * 36

Total power consumed by the headlight = 72Watts

Determine the time it takes to dischage

Time = Energy Stored/Power

Time = 1080/72

Time = 15hrs

Hence it will take the battery 15 hours to discharge completely.

Learn more on energy consumption here: brainly.com/question/24338873

#SPJ4

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jonny [76]

Answer:Reducing mass i.e. water

Explanation:

Frequency For given mass in glass is given by

f=\frac{1}{2\pi }\sqrt{\frac{k}{m}}

where k =stiffness of the glass

m=mass of water in glass

from the above expression we can see that if mass is inversely Proportional to frequency

thus reducing mass we can increase frequency  

6 0
3 years ago
Which of the following is NOT true of fusion?
Gekata [30.6K]
C., used in power plants I think. 
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Tamiku [17]

The answer is D. The Ossicles

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3 years ago
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Of the following approximate conversions of celsius into fahrenheit, which is most accurate? a. 24°c almost-equals 75.9°f b. 2°c
Softa [21]

The most accurate among the options is 13°c almost-equals 55.0°f, when you round down 55.4, you get 55.0

Hence, option D) is the most accurate.

<h3>What is Scale of Temperature?</h3>

Scale of temperature is simply a method used in calibrating the physical quantity of temperature in metrology.

Conversion of Celsius into Fahrenheit, Formula is expressed as;

Degree = (0 × 9/5) + 32 = Fahrenheit

First we check each option;

A) 24°c almost-equals 75.9°f

24°C = (24 × 9/5) + 32 = 75.2°F

B) 2°C almost-equals 35.8°f

2°C = (2 × 9/5) + 32 = 35.6°F

C) 34°C almost-equals 92.7°f

34°C = (34 × 9/5) + 32 = 93.2°F

D) 13°c almost-equals 55.0°f

13°C = (13 × 9/5) + 32 = 55.4°F

The most accurate among the options is 13°c almost-equals 55.0°f, when you round down 55.4, you get 55.0

Hence, option D) is the most accurate.

Learn more about temperature scales here: brainly.com/question/88395

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4 0
2 years ago
On a cosmic calendar, in which the history of the universe is compressed into one year, how long is the average human life span?
netineya [11]

Answer:

If one were to use 5 billion years as the age of the universe and 75 years as the average human life span then

T = 75 / 5 E9 = 1.5E-8

The number of seconds in a year is 3600 * 24 * 365 = 3.2E7

If t = N * T   seconds in a year * fraction of human life span

t = 1.5E-8 * 3.2E7 = .48

A human life span is about 1/2 second compared to the life of the universe if the universe were compressed to a single year

8 0
2 years ago
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