The correct answer is (B)
Which is (kQ1Q2) / d^2
Answer:
Hipparchus was an ancient Greek who classified stars based on the brightness in 129 B.C. He grouped the brightest stars and ranked them 1 (first magnitude) and dimmest stars as 6 (sixth magnitude). Thus, the smaller numbers indicated brighter stars. Now, the scale extends in negative axis as well. More the negative number, brighter is the star. For example, Sun has magnitude -26.74.
This the apparent magnitude which means the classification is based on the brightness of the star as it appears from the Earth.
Answer: 54.55 m/s
Explanation:
Distance = 300 m
Time = 5.5 s
Average Speed = Total Distance/Total Time
= 300/5.5
= <u>54.55 m/s</u>
Hope this helped..
Hi there!
1. Weather is the condition in a day describing humidity, temperature, and rain or sun conditions. It also includes different features, including hail, snow, and storms.
2. Our atmosphere provides the air we need to breath. It also protects us from harmful UV rays from the sun, and it traps heat to ensure that the planet doesn't freeze.
3. We might have storms such as thunderstorms, or gusts of warm air coming our way. This is caused by the warm front.
4. Yes, it is possible that humans and dinosaurs drank the same water. Because of the water cycle and that water on earth never leaves the atmosphere since it is always cycled or recycled, it is possible that the same water, just in different states, have been in the mouth of a dinosuar.
Hope this helps!