Answer:
The minimum resistance value is 
Explanation:
According to the question, we have:
The voltage given as 
The internal resistance as 
The goal here is to find the minimum resistance for the voltmeter such that its reading is within 1.0% of the battery's emf.
This means we require voltmeter resistance such that:
V = (100% - 1%) of E
Where E is the battery's e.m.f. and V is the voltmeter reading.
So, V = 99% of E = 0.99 E = 7.425.
In general, we have:
E = V + ir
where ir denotes the internal voltage drop across the voltmeter, and V is the reading from the voltmeter.
By rearranging, we get:
Since the current remains constant throughout the circuit:
where 
is the voltmeter resistance value.
Hence, 
a.) 10 Hz b.) 0.1 s c.) 187.4 m/s d.) -412.6 m/s²
The force due to electricity on the charge is calculated by multiplying the charge by the intensity of the electric field:
in our scenario, where
and
, resulting in the force of
Initially, the kinetic energy of the particle is at zero (as it remains stationary), which means its final kinetic energy is equal to the work performed by the electric force over a distance of x=4 m:
Since we can't see the image the teacher has provided, we must deduce its content based on clues from the answer choices. The image likely illustrates an atom containing 3 protons and 3 neutrons in the nucleus, along with 3 electrons orbiting it. If that is the case, Mike is correct (first choice) because the atomic number indicates the number of protons present in an atom. Since there are 3 protons, it corresponds to lithium, which has an atomic number of 3. The second choice is false, as electrons do not factor into atomic mass. The third and fourth options are also incorrect; regrettably, Joan does not grasp the concepts accurately.
Explanation:
The formula for the electric field produced by an infinite sheet of charge is outlined below.
E = 
where, 
is the surface charge density
Following this, the formula for the electric force acting on a proton is given as:
F = eE
where, e is the charge of a proton
According to Newton's second law of motion, the overall force on the proton can be expressed as follows.
F = ma
a = 
= 
= 
According to kinematic equations, the proton's speed in the perpendicular direction can be described as follows.
= 
= 
= 683.974 m/s
Thus, the overall speed of the proton can be calculated as follows.
v' = 
=
= 
= 1178.73 m/s
Consequently, we conclude that the proton's speed is 1178.73 m/s.
