A scientist performs an experiment on an unknown element. She finds that the element forms an ionic bond with beryllium (Be) but
2 answers:
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Answer:
a) Yes, there are shakes in a second (
) in a year there are 31,536,000 seconds... that is 3.1536x
(
)
b) Note that the defined universe day will have 60*60*24=86400 universe seconds if the seconds are defined as normal seconds.
Also one universe day (or 86400 universe seconds) is equivalent to 1010 years. Now using a rule of three we can know the seconds that humans have existed.
That is about 2 and half hours.
Answer:
t = 1.099 s
Explanation:
given,
constant speed = 2.51 m/s
height of balloon above ground = 3.16 m
time elapsed before it hit the ground = ?
Applying equation of motion to the compass
using quadratic formula to solve the equation
t = 1.099 s, -0.586 s
hence, the time elapses before the compass hit the ground is equal to 1.099 s.
The concept that we need to give solution to this problem is collision equation given by momentum conservation,
Our values are,
Then,
Part A) We can here note that the velocity for the puck is zero (there is not a velocity in that direction)
Part B ) We apply the same solution but know we note that in the collision for the Goalie the velocity is zero.