Answer:
(D)6 times
Explanation:
Hello !
Because when we see the equation of momentum P=mv, where p=momentum
m=mass of the object&
v=velocity of the object
And, p is directly propositional to both mass and velocity.
Thus, p=mv
- p=3m.2v....giving on the values
- p=6(mv)
Therefore, we can conclude by when the mass is tripled and the velocity is doubled the momentum is increased by 6 units.
Vibration of a certain medium is necessary for the production of sound. For example vibratuon in the guitar's strings, vibration in vocal chord (when humans are speaking) etc etc.
Sound energy is the form of waves. Thus it requires a specific media to transmit itself. For instance sound travels fastest in solids. Sound also travels in liquids and air (gases). However, if there is no medium present. Sound will not travel.
Hope you get the answer :)
Answer:
Part a)
Part b)
Explanation:
As we know that two carts are moving in opposite directions
so here total momentum of two carts must be given by vector subtraction
It is given as
Now we know that total momentum of the system is conserved here as there is no external force on this system
so the speed of the first cart when second cart was at rest is given as
Answer:
A.
Explanation:
To solve this problem it is necessary to take into account the concepts related to angular velocity and centripetal acceleration,
from the cinematic equations of motion we know that
where,
V = Tangential Velocity
r = radius
Angular velocity
While the centripetal acceleration is given by
The displacement of the object is based on gravitational acceleration, so
a = g = 9.8 and the radius would be
Reemplazando:
Therefore the answer is A.
One major obstacle to developing good human relations is that man is fearful by nature. There are risks involved in developing human relations, and humans are mostly too scared to take those risks. Majority of humans are comfortable with staying in their own comfort zones, and would like to avoid the hassle of getting to know others.