There are three forces acting on the book.
1. Force due to gravity
2. Force exerted downward by the hamster
3. Normal Force in reaction to the downward forces
Since the book is not moving, the net force is zero. The summation of all forces must be zero. Then we could find the normal force which is unknown (denoted as x).
∑F = -(4 kg)(9.81 m/s2) - 3 N + x =0
∑F = -39.24 N - 3N + x =0
x = 42 N
Therefore, the normal force is 42 N.
The atom's atomic number is the number of protons in its nucleus.
<span>The answer is B, because a heterogeneous mixture consists of elements that have the same appearance and composition, If sand, salt, and iron filings are combined, they would look like one uniform element rather than three separate elements.</span>
Answer:
electron
Explanation:
The energy for particle in a box is given by:
for the system in ground state, n =1
Since, the boxes are identical, L is same for all the three particles.
h is Planck's constant.
Since energy is inversely proportional to wavelength, therefore
Thus, electron has the longest wavelength.