Answer:
a. Ban Freon, aerosol cans, and refrigerants
Explanation:
 
        
             
        
        
        
Answer:
Acceleration of that planet is 30  .
.
Given:
initial speed of hammer = 0 
time = 1 s
distance = 15 m
To find:
Acceleration due to gravity = ?
Formula used:
Distance covered by hammer is given by,
s = ut + 
s = distance
u = initial speed of hammer
t = time taken by hammer to reach ground
a = acceleration
Solution:
Distance covered by hammer is given by,
s = ut + 
s = distance
u = initial speed of hammer
t = time taken by hammer to reach ground
a = acceleration
u = 0
t = 1 s
s = 15 m
a = g
Thus substituting these value in above equation.
15 = 0 + 
g = 15 × 2 
g = 30 
Thus, acceleration of that planet is 30  .
.
 
        
             
        
        
        
Answer:
the  heat absorbed by the block of copper is 74368.476J
Explanation:
Hello!
To solve this problem use the first law of thermodynamics that states that the heat applied to a system is the difference between the initial and final energy considering that the mass and the specific heat do not change so we can infer the following equation
Q=mCp(T2-T1)
Where
Q=heat
m=mass=2.3kg
Cp=0.092 kcal/(kg C)=384.93J/kgK
T2=Final temperatura= 90C
T1= initial temperature=6 C
solving

the  heat absorbed by the block of copper is 74368.476J
 
        
             
        
        
        
Answer:
Power of the string wave will be equal to 5.464 watt
Explanation:
We have given mass per unit length is 0.050 kg/m 
Tension in the string T = 60 N 
Amplitude of the wave A = 5 cm = 0.05 m 
Frequency f = 8 Hz 
So angular frequency 
Velocity of the string wave is equal to 
Power of wave propagation is equal to 
So power of the wave will be equal to 5.464 watt
 
        
             
        
        
        
Answer: the conclusion is that
Explanation: