Answer: The Bluray Disk can store more information
The wavelenght of red light is around 700nm, whereas the wavelenght of violet light is around 400nm. Since the violet light has smaller wavelenght the data tracks on a Blu-ray Disk can be spaced closer together and the Blueray Disk can store more information
Explanation: Because a disk work by storing data using bits, the more bits can be stored in one place improves the total storage on the unit. The less the space to storage the bit, the more space overall for the disk.
Answer:
6.86 cm
Explanation:
<u>Given:</u>
- q = charge on the first bead on the table=
- m = mass of bead on the table =
- Q = charge on the second bead =
<u>Assume:</u>
- r = the closest distance between the centers of the beads
- F = electrostatic force of attraction between the two beads
- W = weight of the first bead
- g = acceleration due to gravity = 9.8\ m/s^2
- N = normal force on the first bead
When the first bead rests on the table, then electrostatic force due to the second bead acts on it in the upward direction, Normal force acts in the upward direction and its weight in the downward direction.
So, using Newton's second law on the first bead resting on the table, we have
At the closest distance of the second bead to the first bead, it just lifts off the table and the normal force becomes zero.
Hence, the centers of the two beads must be brought closest to 6.86 cm before the lower bead is lifted off the table.
Answer:
500 kg
Explanation:
using the formula Potential energy (p.e)=mgh where g= acceleration due to gravity whose value is 9.8
so,pe =mgh
622300=m*9.8*127
m=500kg
B, since it includes both an increase in speed and a change in direction.