Answer:
How are chemical and physical changes different on a molecular level? Chemical changes involve the breaking of bonds in molecules. Chemical changes do not affect bonding between atoms. Physical changes
Explanation:
Answer:
The frequency of the simple harmonic motion of a 67.6 kg diver on the board = 2.48 Hz
Explanation:
The frequency in simple harmonic motion is related to spring constant and mass causing the motion through the relation
f = (1/2π) √(k/m)
When mass = 10 kg, f = 6.90 Hz,
6.9 = (1/2π) √(k/10)
(√(k/10) = 6.9×2π = 43.354
k/10 = 43.354² = 1879.57
K = 18795.7 N/m
When a diver of mass 67 kg climbs the diving board, the total mass on the diving board now becomes (10+67.6) = 77.6 kg
Spring constant of the diving board doesn't change,
So, the frequency is then given by
f = (1/2π) √(18795.7/77.6)
f = 2.48 Hz
A then c then b then d but it might be mising a step
Answer:
1.2 102j
Explanation:
because it is the most important for me
The chart lists the masses and velocities of four objects.
Which object requires the greatest change in momentum in order to stop its motion?
Answer
Z
