Answer:
The position of the image = 7.2 cm.
Explanation:
Given:
A Converging lens:
Object distance = 12 cm = -12 cm (sign convention)
Focal length = 18 cm
We have to find the position of the image.
Let the position of the image be .
Sign convention:
The focal length of converging (convex) lens is always positive,while object distance is negative.
Using lens formula:
⇒
⇒
⇒
⇒
⇒
⇒
⇒
⇒
⇒ cm
So the position of the image = 7.2 cm.
Answer:
The original speed of the mess kit is 5.65 m/s.
Explanation:
Given that,
Mass of kit =7.0 kg
Mass of first = 3.5 kg
Speed= 5.5 m/s
Speed of other particle part = 7.5 m/s
Angle = 30°
We need to calculate the momentum of first part
Using formula of momentum
Put the value into the formula
We need to calculate the momentum of second part
Using formula of momentum
We need to calculate the total momentum
We need to calculate the original speed of the mess kit
Using formula of momentum
Put the value into the formula
Hence, The original speed of the mess kit is 5.65 m/s.
Average velocity has two parts: Its magnitude (size) and its direction.
Its magnitude is
(straight-line distance between start-point and end-point, regardless of the route that's actually followed from start to finish) divided by (time taken to travel from start to finish).
Its direction is
(direction from start-point to end-point)
Notice that straight from this definition, the average velocity of going around a full circle is zero, no matter how fast you traveled. That's because the size of the average velocity is calculated from the straight-line distance from start-point to end-point, and that's zero if you finish at the same point you started from.
Answer:
B = A : 2
Explanation:
because is the opposite of A=2B