Answer:
4.79 J
Explanation:
The energy of a single photon is given by
where
is the Planck constant
f is the frequency of the photon
Here we have
so the energy of one photon is
Here we have 1 mol of photons, which contains
photons (Avogadro number). So, the total energy of this mole of photons is:
Answer:
D. 200 kgm/s
Explanation:
Momentum is conserved.
Initial momentum = final momentum
(50 kg) (4 m/s) + (30 kg) (0 m/s) = final momentum
200 kgm/s = final momentum
C. A combined circuit
That’s the answer
The gravitational force between the objects is 
Explanation:
The magnitude of the gravitational force between two objects is given by the equation:
where
is the gravitational constant
are the masses of the two objects
r is the separation between the objects
For the two objects in this problem:
And their distance is
r = 2.6 m
So, the gravitational force between them is
Learn more about gravitational force:
brainly.com/question/1724648
brainly.com/question/12785992
#LearnwithBrainly
Explanation:
First of all we calculate the volume which is 20m×10m×8m= 1600m^3 and then multiply the density by the volume to get the mass which will equal to 99200kg therefore the weight will be
<em><u>Weight</u></em>
mass × acceleration due to gravity
=99200kg × 10m^s^2
=992000N
