Answer:
k=19 N/m
Explanation:
Use the equation F=kx for this problem and isolate k since that is what you're solving for (k=F/x). Plug in your values (F=1.2 N and x=0.064 m) and solve for k which is 19 N/m.
Answer: one brain... humans have one brain
Explanation: humans have many parts of the brain but they only have one brain there are left brain right brain people. Right brain tends to me more creative and left brain is more logical but its is all still the same brain you just use different parts of the brain at one time
As we know that reaction time will be
so the distance moved by car in reaction time
now the distance remain after that from intersection point is given by
So our distance from the intersection will be 100 m when we apply brakes
now this distance should be covered till the car will stop
so here we will have
now from kinematics equation we will have
so the acceleration required by brakes is -2 m/s/s
Now total time taken to stop the car after applying brakes will be given as
total time to stop the car is given as
m = mass of sample = 15.6 g = 0.0156 kg
c = specific heat of the sample = 0.58 kcal/kgC = 580 cal/(kgC)
= initial temperature = 21.5 C
= final temperature = ?
Q = heat absorbed = 0.207 kcal = 207 cal
using the equation
Q = m c (-)
207 = (0.0156) (580) (-21.5)
= 44.4
Answer:
a)
b)
c) The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.
Explanation:
Given:
- temperature of the inner surface of the wall,
- temperature of the outer surface of the wall,
- temperature of the air outside,
- temperature of the air inside,
- coefficient of heat convection on outside,
- coefficient of heat convection on inside,
a)
The heat flux between the interior air and the wall:
The convective heat transfer rate is given as,
b)
The heat flux between the exterior air and the wall:
c)
The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.