Answer:
Energy transfer takes place when energy moves from one place to another. Energy can move from one object to another, like when the energy from your moving foot is transferred to a soccer ball, or energy can change from one form to another.This transfer happens in three different ways—by conduction within solids, by the flow of liquid or gas (convection), and by radiation, which can travel across space. Even when a system is isolated (such as Earth in space), energy is continually being transferred into and out of it by radiation.Fuel cells (Chemical energy → Electrical energy) Battery (electricity) (Chemical energy → Electrical energy) Fire (Chemical energy → Heat and Light) Electric lamp (Electrical energy → Heat and Light)
First, you need to calculate the resultant force:
R = m · a
= (12.3 + 5.1) · 1.5
= 26.1 N
Then, you can calculate the force of friction:
R = F - Fₐ
Fₐ = F - R
= 33 - 26.1
= 6.9 N
Now, we know that:
Fₐ = μ·m·g
Therefore we can solve for μ:
μ = <span>Fₐ/mg
= 6.9 / (17.4 · 9.8)
= 0.40
The coefficient of dynamic friction is </span>μ = <span>0.40
</span>
Answer:
Length of the string, l = 0.486 meters
Explanation:
It is given that,
Mass of the string,
Tension in the string, T = 120 N
Frequency of transverse wave, f = 260 Hz
Wavelength of the wave,
The speed of a transverse wave (v) is given by :
........(1)
<em>Where,</em>
Also, speed of a wave, .........(2)
From equation (1) and (2) :
l = 0.486 m
So, the length of the string is 0.486 meters. Hence, this is the required solution.
Bohr's model of the atom shows that electrons follow a definite orbit with distinct distances away from the nucleus. The electron cloud on the other hand suggests that the electrons are within a cloud without a definite orbit. The locations of electrons are based on probability that they are there.
Voltage is additive in series. The voltage drop across each load is added to equal the total voltage.