You can thank me if this answer helps. The energy coal comes from energy that was stored in giant plants that lived hundreds of millions of years ago in swamp forests,even before dinosaurs!
Rubbing the balloon on you hair, the hair causes electrons to be added to the balloon. Hence, the balloon would have excesses electrons.
Hence charge on the balloon is negative.
The effect of the silk is to remove electrons, so when the glass rod is rubbed with silk, the silk remove electrons from the glass rod. Hence, since the rod has lossed electrons, it would then be positively charged.
Hence charge on the glass is positive.
Answer:
Explanation:
Given
mass of sled =26 kg
coefficient of static friction
coefficient of kinetic friction
In order to move sled from rest we need to provide a force greater than static friction which is given by
After Moving Sled kinetic friction comes in to play which is less than static friction
therefore minimum force to keep moving sledge at constant velocity is 18.34 N
Answer:
34000 J or 34 kJ
Explanation:
From the question, The energy needed to just melt the ice cube does not requires any external temperature or change in temperature, Hence it is called latent heat
By Applying,
Q' = C'm........................ Equation 1
Where Q' = Latent heat, C' = Specific latent heat of fusion of water, m = mass of ice.
Given: C' = 340000 J/kg, m = 100 g = 0.1 kg
Substitute into equation 1
Q' = 0.1(340000)
Q' = 34000 J
Q' = 34 kJ
The volume of an object that has a mass of 16 g and a density of 12 g/cm³ is 1.33cm³.
<h3>How to calculate density?</h3>
Density is a measure of a substance mass in relation with it's volume, which means that it can be calculated by dividing the mass of the substance by volume as follows:
Density = mass ÷ volume
According to this question, an object has a mass of 16 g and a density of 12 g/cm³. The volume can be calculated as follows:
Volume = 16g ÷ 12g/cm³
Volume = 1.33cm³
Therefore, the volume of an object that has a mass of 16 g and a density of 12 g/cm³ is 1.33cm³.
Learn more about volume at: brainly.com/question/952755
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