Answer:
Explanation:
Let's start finding the frequency heard by the bystander due to the moving car. We need to use Doppler effect here:
v is the speed of sound (v = 343 m/s)
So, we have:
Now, the beat frequency heard by the bystander is the combine of the frequencies, it means the difference between them. Therefore the equation is given by:
I hope it helps you!
Answer:
Total work done is 2606.08 J.
Explanation:
Given :
Mass of box , m = 23 kg .
Force applied , F = 100 N .
Angle from horizon , .
Coefficient of kinetic friction , .
Distance travelled by box , d = 34 m .
Now ,
Total work done = work done by boy + work done by friction.
Hence , this is the required solution.
As we know that with respect to oxygen atom taken as reference the product of atomic mass and specific heat of a metal will remain constant.
this product is equal to 0.38
so here we will say that let atomic mass of the metal is M
so with respect to oxygen atom its mass is given as
now we will have
now we will have
so atomic mass of the metal is 7 g/mol