Electroscope is the instrument that has the ability to detect the presence of an electric charge. Although electroscope has the power to measure the amount of charge, but for a perfect measurement the electrometer is used. Around the year 1600, electroscope was discovered by William Gilbert he British physician. This is a pretty primitive but highly effective instrument in regards to detecting the presence of electric charges. Two basic but effective electroscopes are the gold-leaf electroscope and the pith-ball electroscope.
Answer:
According to the National Cancer Institute, the average cost of a pack of cigarettes is $6.28, which means a pack-a-day habit sets you back $188 per month or $2,292 per year. 1 Ten years of smoking comes with a $22,920 price tag
Explanation:
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The pressure exerted is 
Explanation:
The pressure exerted by a force on a surface is given by
where
p is the pressure
F is the magnitude of the force
A is the area of the surface
In this problem, we have:
F = 200 N is the force exerted (the weight of the ant)
is the area
Therefore, the pressure exerted is:
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Answer:
5
Explanation:
a= v ÷ t which when you insert it into the equation it should be a= 40m/s ÷ 8s
Answer:
I gonna give you the number so but you need to round 6.19047619048
Explanation:
- This is a speed formula so you would use the formula speed=distance/time
- You need to rearrange it to time=distance/speed
- So you need to divide 13m by 2.1 m/s
