For a neutral atom number of electrons equals number of protons, in other for the net charge of the atom to be zero...
no. of electrons = 12
Answer: option D
Explanation: let us first define an heat engine.
An heat engine is that device that converts partly heat energy into mechanical energy.
Inside the heat engine is a substance that undergoes compression and expansion, intake and outtake of heat, this is known as a working substance.
For heat engines to work perfectly, the working substance has to take a substantial large amount of heat energy from a source, this source is the hot reservoir, the amount of heat energy given out by this reservoir is Qh and the temperature at this region is Th. The heat from the hot reservoir is accepted by the working substances and sent to a region that will discard it out, this region is known as the cold reservoir and the heat energy at this point is Qc and temperature is Tc.
Judging by the direction of heat flow, heat energy moves from hot reservoir to the cold reservoir for the heat engine to work perfectly fine, hence Qh must be greater than Qc and Th must be greater than Tc.
Hence Qh>Qc and Th>Tc
Answer:
please find attached file
Explanation:
Answer:
An object’s weight is proportional to its mass.
Answer: Length axis f= 114.3 Hz, Width axis f=228.67 Hz
Explanation:
We are given that,
Length of tub= 1.5 m
Width of tub= 0.75 m
Sound speed= 343 m/s
Now, we are also given shower is closed.
So, frequency is given as:
f= 
For length axis
Put v= 343 m/s, m=1 and L=1.5 m
f= 1 * 
f= 114.3 Hz
For next resonant frequency, m=2
f= 2*
f= 228.67
For width axis
Put v= 343 m/s, m=1 and L= 0.75 m
f= 1* 
f= 228.67 Hz
For next frequency, m=2
f= 2*
f= 457.34 Hz
