Two objects are electrically charged. The net charge on one object is doubled. Therefore, the electric force _____.
2 answers:
Answer:
The electric force gets doubled.
Explanation:
According to Coulomb's law the force acting on charged bodies is directly proportional to the product of charges and inversely proportional to the square of distance between them.
Mathematically, it can be written as :
Where
r is the distance between the charges
In this question, it is given that the net charge on one object is doubled. As we can see from Coulomb's law, the electric force (F') gets doubled.
i.e.
F' =2 F
Hence, this is the required solution.
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Answer:
Heat capacity, Q = 2090 Joules.
Explanation:
Given the following data;
Mass = 100 grams
Specific heat capacity = 4.18 J/g°C.
Temperature = 5°C
To find the quantity of heat required;
Heat capacity is given by the formula;
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
t represents the temperature of an object.
Substituting into the formula, we have;
Heat capacity, Q = 2090 Joules.
(a) The value of the gravitational acceleration is given by:
where
is the gravitational constant
M is the Earth's mass
is the Earth's radius at the pole
If we use the value for g given by the problem, , and we rearrange the equation above, we find the value of the Earth's mass:
(b) The value we found for the Earth's mass is , and we see that this value is slightly larger than the accepted value of
.