They do in fact help build up coral reefs.
Explanation:
For each point:
PE = mgh
KE = ½ mv²
ME = PE + KE
Since energy is conserved, ME will be constant.
I'll be using g = 10 m/s².
A. PE = (100 kg) (10 m/s²) (102 m) = 102,000 J
KE = ½ (100 kg) (0 m/s)² = 0 J
ME = 102,000 J
B. KE = ½ mv²
18,000 J = ½ (100 kg) v²
v = 60 m/s
ME = 102,000 J
PE = ME − KE = 84,000 J
(100 kg) (10 m/s²) h = 84,000 J
h = 84 m
C. KE = ½ (100 kg) (29 m/s)² = 42,050 J
ME = 102,000 J
PE = ME − KE = 59950 J
(100 kg) (10 m/s²) h = 59950 J
h = 59.95 m
d. PE = (100 kg) (10 m/s²) (60 m) = 60,000 J
ME = 102,000 J
KE = ME − PE = 42,000 J
½ (100 kg) v² = 42,000 J
v = 29.0 m/s
E. PE = (100 kg) (10 m/s²) (0 m) = 0 J
ME = 102,000 J
KE = ME − PE = 102,000 J
½ (100 kg) v² = 102,000 J
v = 45.2 m/s
Answer:
The Answer is A) Metal X aluminium; Metal Y platinum
Explanation:
The behavior of the bimetallic strip depends on the coefficient of thermal expansion. Where the coefficient of the metal X should be greater than the coefficient of thermal expansion for metal Y. In the attached image we can see the effect of this particular behavior.
In the only case where the coefficient of thermal expansion of the metal X is greater than the used in the metal Y is in case A.
Here we have:
Answer:
Angular displacement of the wheel,
Explanation:
It is given that,
Angular acceleration of the wheel,
Final speed of the wheel,
Time taken, t = 4.5 s
Initially, it is required to find the initial angular velocity of the wheel. Using the first equation of rotational kinematics as :
is the initial speed of the wheel
Let is the angular displacement of each wheel during this time. Using the second equation of motion as :
So, the angular displacement of each wheel during this time is 267 radian.
False because when you flip the left glove inside out and put your right hand in the glove will still be a left handed glove so that states that your right hand will not fit in the left glove even though it is flipped inside out