Find the area of a circle with a radius r of 6 feet. Round off your answer to one decimal point. Hint: the formula for the area
of a circle is A = π r2 and π should be approximated to four decimal places. 
2 answers:
You might be interested in
Answer:
The value is
Explanation:
From the question we are told that
The Coulomb constant is
The charge on the electron/proton is
The mass of proton
The mass of electron is
Generally for the electron to be held up by the force gravity
Then
Electric force on the electron = The gravitational Force
i.e
Answer:
Final temperature of the copper is 59 degrees Celsius
Explanation:
It is given that,
Mass of the sample of copper metal, m = 6.5 g
Initial temperature of the metal,
Heat generated, Q = 84 J
The specific heat capacity of liquid water is 0.38 J/g-K
Let is the final temperature of the copper. It can be calculated using the definition of specific heat of any substance. It is given by :
or
So, the final temperature of the copper is 59 degrees Celsius. Hence, this is the required solution.