Answer:
The answer is 24cm
Explanation:
This problem bothers on the curved mirrors, a concave type
Given data
Object height h= 5cm
Object distance = 12cm
Focal length f=24cm
Let the image distance be v=?
Applying the formula we have
1/v +1/u= 1/f
Substituting our given data
1/v+1/12=1/24
1/v=1/24-1/12
1/v=1-2/24
1/v=-1/24
v= - 24cm
This implies that the image is on the same side as the object and it is real
Answer:
Angular velocity, 
Explanation:
The mass of the skater, M = 74.0 kg
Mass of each arm, 
( since it is 13% of the whole body and each arm is considered)
Mass of the trunk, 
Total moment of Inertia = (Moment of inertia of the arms) + (Moment of inertia of the trunks)
The final moment of inertia of the person:
According to the principle of conservation of angular momentum:
C. positive, this is right because when something it is charged kinda how when you charge your phone it has energy now so that means it is positive but when its dead it is negative
Answer:
10 m/s
1.87914 s
18.7914 m
Explanation:
v = Initial velocity = 20 m/s
= Angle = 60°
Horizontal component is given by
The horizontal component is 10 m/s
y direction final displacement is zero
The time the ball is in the air is 1.87914 s
Range is given is by
The range is 18.7914 m
KE depends on velocity. It is easier to answer this question in terms of the earth.
The closer the object (earth/comet) is to the sun, the faster it moves. that means that the fastest moving point would be as the comet/earth passes through point C.
The slowest speed would be the furthest away from the sun which is point A.
Answer: The faster the planet moves the greater the Kinetic Energy.
The Slower the planet moves, the less the KE.
Point A is where it is slowest with the lowest amount of energy.
Discussion
The formula for KE is KE = 1/2mv^2. The mass of the comet or earth is a constant. It doesn't change no matter which point the comet passes through. If v goes down KE will go down. If v goes up, KE goes up.
