(a) -267 N
Explanation: if the refrigerator is not moving, it means that the net force acting on it is zero.
We are only interested in the motion along the horizontal direction; there are two forces acting in this direction:
- The pushing force, forward, F=+267 N
- The static frictional force, backward, 
Since the net force must be zero, we have
(b) 363.1 N
The largest pushing force that can be applied to the refrigeratore before it begins to move is equal to the magnitude of the maximum static frictional force, which is given by:
where
is the coefficient of static friction
m = 57 kg is the mass of the refrigerator
g = 9.8 m/s^2 is the gravitational acceleration
Substituting,
Answer:
The pressure of the air is 499.91 kPa.
Explanation:
Given that,
Initial pressure = 430 kPa
Temperature = 13.0+273=286 K
Final temperature = 59.5+273=332.5 K
We need to calculate the final pressure
Using relation of pressure and temperature
At constant volume,
Hence,The pressure of the air is 499.91 kPa.
52. It’s chemistry my dear^^^
Answer:
more than 90%
Explanation:
In the unknown liquid the buoyant force and weight relation is
It can be seen that if the density decreases the buoyant force decreases.
If the object is already 90% submerged in water then, if the other liquid has density less than that of water the object will be submerged more than 90%.
