Answer:
Explanation:
A Spring stretches / compresses when force is applied on them and they are governed by the Hookes Law which states that the force required to stretch or compress a spring is directly proportional to the distance it is stretched.
F is the force applied and x is the elongation of the spring
k is the spring constant.
negative sign indicates the change in direction from equilibrium position.
In the given question, we dont have force but we know that the pan is hanging. We also know from the Newton's second law of motion that
Inserting this into Hooke's Law
computing it for x,
This is the model which will tell the length of the spring against change in the mass located in the pan.
Answer: liquid to solid
Explanation: Kinetic energy is the energy possessed by an object by virtue of its motion.
Solid is the phase of matter where particles have strongest inter molecular forces and thus molecules posses no kinetic energy.
Liquid is the phase of matter where kinetic energy of the molecules is almost equal to the inter molecular forces.
Gas is the phase of matter where kinetic energy of the molecules is more than the inter molecular forces present among molecules and hence the molecules move randomly.
Thus the phase change is from liquid to solid.
Explanation:
The given data is as follows.
Area (A) = 0.7 
.
Electric field between the plates, (E) = 55 N/C
Since, electric field is related to surface charge density as follows.
Also, E = 
or, 
Therefore, charge will be calculated as follows.
Q = 
= 
= 
= 341 pC
Thus, we can conclude that magnitude of the charge on each plate is 341 pC.
The frequency of light wave is 0.6*10^15 Hz.
The relation between the speed of light, frequency, and wavelength is given as
c=λν
Plugging the values in the above equation
3*10^8=5*10^(-7)*ν
ν=0.6*10^15 Hz.
Therefore the frequency of the light wave is 0.6*10^15 Hz.
