The basic relationship between voltage, resistance and current of an electrical device is given by Ohm's law:
where
V is the voltage
I is the current
R is the resistance
The hot plate in our problem is connected to a source of V=120 V and it has a resistance of
, therefore we can rearrange the previous equation to calculate the current through the device:
Complete Question
A 0.025-kg block on a horizontal frictionless surface is attached to an ideal massless spring whose spring constant is 150 N/m. The block is pulled from its equilibrium position at x = 0.00 m to a displacement x = +0.080 m and is released from rest. The block then executes simple harmonic motion along the horizontal x-axis. When the displacement is x = 0.024 m, what is the kinetic energy of the block?
Answer:
The kinetic energy is
Explanation:
From the question we are told that
The mass of the block is
The spring constant is
The length of first displacement is
The length of first displacement is
At the the kinetic energy is mathematically evaluated as
Where is the change in energy stored on the spring which is mathematically represented as
=>
Substituting value
because positive and negative attract
Each shell can contain only a fixed number of electrons: The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to18 (2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n2) electrons.
Potential energy=mgh
m=3kg
g=<span> 9.81 m/s)</span>
h=<span> 1.00 m
p.E=</span><span> 3*9.81*1 = 29.43 Joules
</span><span> (1/2)mv^2=mgh
</span>so the kinetic energy is equal to
=29.4 J