Answer:
Explanation:
According to Charles Law
=>
Where = 0.0279 m³, = 280 K and = 320 K
=>
=> = 0.03189 m³
Work done by each is the same for they reach the same height. The one who climbs in 30s uses more power because work is done in a shorter time.
Answer:
The mass of the string and new frequency are 20.78 g and 40.0 Hz.
Explanation:
Given that,
Frequency = 50.0 Hz
Mass per unit length = 0.115 g/m
String length = 210.4 cm
Number of loops = 5
We need to calculate the mass is hung from the string
Using formula of frequency
Where, f = frequency
M = mass per unit length
T = tension
Put the value into the formula
We need to calculate the new frequency for 4 loops
Using formula of frequency
Hence, The mass of the string and new frequency are 20.78 g and 40.0 Hz.
In the A case, v0=0, in the B case v0 >0, so v is greater in the B case. In other words, v is related to the kinetic energy, since the rock B has a larger kinetic energy in the beginning, it also has a larger kinetic energy (larger velocity) in the end.