A compound is combining two or more substances chemically and it’s pure with a new substance forming, a mixture is combing two or more substances into one physically its impure and no new substances form
Answer:
Isotopes are the elements having the same atomic number i.e same number of protons which in turn is equal to same number of electrons. Number of protons and electrons are equal as the atom is electrically neutral. So, the only option is A.
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The acceleration is 1.67 m/s²
<u>Explanation:</u>
Given:
Speed, s = 60km/hr
s = m/s
s = 16.67 m/s
Time, t = 10 seconds
Acceleration, a = ?
We know:
On substituting the value, we get:
Therefore, the acceleration is 1.67 m/s²
Answer:
The total power radiated by the sun is 3.71×10^26W
Explanation:
The Earth is spherical in shape
Therefore, Area = 4πr^2 = 4×3.143×(1.489×10^11)^2 = 2.79×10^23m^2
Power radiated by the Sun = solar radiation on Earth × Area = 1330W/m^2 × 2.79×10^23m^2 = 3.71×10^26W