Answer:
1. 31,536,000 seconds
2. Car B traveled a longer distance
3. Volume of box = 0.235887 cubic meters
Explanation:
Q1. Age in seconds
1 year = 365 days
1 day = 24 hours
1 hour = 60 minutes
1 minute = 60 seconds
Therefore 1 year = 365 x 24 x 60 x 60 = 31,536,000 seconds
In scientific notation this would be ![3.1536\times 10^7 \text{ seconds}](https://tex.z-dn.net/?f=3.1536%5Ctimes%20%2010%5E7%20%5Ctext%7B%20seconds%7D)
Q2. Comparing km and miles
Given:
1 km = 1000m and 1 m = 3.3ft, I km = 1000 x 3.3 = 3300 ft.
Convert Car A distance of 25.7km to feet :
25.7 km. = 25. 7 x 3300 ft. = 84,810 ft.
For Car B that traveled 20 miles,
20 miles = 20 x 5280 = 105,600 ft.
Since 105,600 > 84,810, car B traveled a longer distance
Q3. Volume of wooden box
The wooden box is in the shape of a rectangular prism
It volume is L x W x H
Volume = 1.525 x 0.30 x 0.5156 = 0.235887 cubic meters
Sun Gives off UV rays which are harmful to the human skin causing the cells to get damaged which can cause a mutation in the cell why the Flashlight give off light based on battery’s and an Electrical system
They all have the same aphelion distances
Answer:
It is the amount of thermal energy (heat) needed to raise the temperature of 1kg of a substance by 1°C.
*It is important to state that it is per kg because of the word "specific".
Answer:
a) 200J b) 200J c) -100J d) -300J
Explanation:
Formula for Potential energy
where w (10 N) is weight of the camera and h is position with respect to the reference point.
(a) When ground being zero, then
while ![y_{ground} = 0](https://tex.z-dn.net/?f=y_%7Bground%7D%20%3D%200)
At drone: ![E_d = 10 * 20 = 200 J](https://tex.z-dn.net/?f=E_d%20%3D%2010%20%2A%2020%20%3D%20200%20J%20)
On ground: ![E_g = 10 * 0 = 0 J](https://tex.z-dn.net/?f=%20E_g%20%3D%2010%20%2A%200%20%3D%200%20J)
![\Delta E = 200 - 0 = 200 J](https://tex.z-dn.net/?f=%5CDelta%20E%20%3D%20200%20-%200%20%3D%20200%20J)
(b) When drone being zero, then
while ![y_{ground} = -20](https://tex.z-dn.net/?f=y_%7Bground%7D%20%3D%20-20)
At drone: ![E_d = 10 * 0 = 0 J](https://tex.z-dn.net/?f=E_d%20%3D%2010%20%2A%200%20%3D%200%20J%20)
On ground: ![E_g = 10 * (-20) = -200 J](https://tex.z-dn.net/?f=%20E_g%20%3D%2010%20%2A%20%28-20%29%20%3D%20-200%20J)
![\Delta E = 0 - (-200) = 200 J](https://tex.z-dn.net/?f=%5CDelta%20E%20%3D%200%20-%20%28-200%29%20%3D%20200%20J)
When the point of zero gravitational potential energy is at a person 30m from the ground then
while
and ![y_{drone} = - 10](https://tex.z-dn.net/?f=y_%7Bdrone%7D%20%3D%20-%2010)
(c) Before falling from drone: ![E_d = 10 * (-10) = -100 J](https://tex.z-dn.net/?f=E_d%20%3D%2010%20%2A%20%28-10%29%20%3D%20-100%20J%20)
(d) After landing on ground: ![E_g = 10 * (-30) = -300 J](https://tex.z-dn.net/?f=%20E_g%20%3D%2010%20%2A%20%28-30%29%20%3D%20-300%20J)