Easier or more easy to follow?
Answer:
Explanation:
speed of light = 3 x 10⁸ m /s .
distance between moon and the earth = 3.77 x 10⁵ x 10³m .
Time taken by light to cover the distance
= distance / speed
= 3.77 x 10⁸ / 3 x 10⁸
= 1.256 s
Answer:
3859 g
Explanation:
1 pound = 0.454 kg
therefore, 8.50 ponds = 0.454*8.50 = 3.859
to covert kilograms into grams you need to multiply it by 1000
=3.859*1000
= 3859 grams
Answer:
.
Explanation:
Refer to the velocity-time diagram attached. The displacement of an object over a period of time is equal to the area of the region between the velocity-time plot and the horizontal time axis. That is the case even if the velocity of the object is changing over time.
For the car in this question, the distance travelled in that two seconds should be equal to the trapezoid highlighted in green. That's the region bounded with:
- on the top: the velocity-time function of this car,
- on the two sides: the start and end of the acceleration ( and ,) as well as
- on the bottom: the horizontal time axis.
The formula for the area of a trapezoid is:
.
For the imaginary trapezoid on this velocity-time graph:
- Height: .
- Upper base and lower base: and .
Therefore:
.
1. the tilt of Earth's axis
2. March, April, and May
3. When an object turns around an internal axis (like the Earth turns around its axis) it is called a rotation. When an object circles an external axis (like the Earth circles the sun) it is called a revolution.
4. orbit and tilted axis and the tilt of the Earth on its axis changes the seasons.
5. The North Pole
6. The positioning of the sun
7. equinox