Answer : The correct option is, (B) 
Explanation : Given,
Mass of proton = 
Speed of proton = 0.93 c
Formula used for relativistic momentum of the proton is:
where,
p = relativistic momentum of the proton
= mass of proton
v = speed of proton
c = speed of light = 
Now put all the given values in the above formula, we get:
Therefore, the relativistic momentum of the proton is,
In Burglar alarm, LDR acts an AND gate.
Answer: C
Explanation
The LDR is light dependent resistor. The principle used in the working of LDR is that the resistance is inversely proportional to the intensity of light falling on the diode.
In burglar alarm, LDR diode is combined with an IC 555.
Normally an LED source is made to be incident on the LDR diode with same intensity such that the resistance will be maintained constant.
As the LDR is connected with IC, the voltage will be high when light is falling on the diode.
The IC will give only two output states that is high and low. This confirms that LDR in burglar alarm act as AND gate.
As the thief enters and crosses the LED light, the intensity of the light falling on the diode will decrease leading to decrease in the voltage which will cause the alarm to beep.
You can tell because the line bends and the closer it is to horizontal or past horizontal it is more dense
A, chemical bondings would yield a positive enthalpy change, thus endothermic.
