Answer:
speed of golf ball is 1.15 × m/s
and % of uncertainty in speed = 2.07 × %
Explanation:
given data
mass = 45.9 gram = 0.0459 kg
speed = 200 km/hr = 55.5 m/s
uncertainty position Δx = 1 mm = m
to find out
speed of the golf ball and % of speed of the golf ball
solution
we will apply here heisenberg uncertainty principle that is
uncertainty position ×uncertainty momentum ≥ ......1
Δx × ΔPx ≥
here uncertainty momentum ΔPx = mΔVx
and uncertainty velocity = ΔVx
and h = 6.626 × Js
so put here all these value in equation 1
× 0.0459 × ΔVx =
ΔVx = 1.15 × m/s
and
so % of uncertainty in speed = ΔV / m
% of uncertainty in speed = 1.15 × / 55.5
% of uncertainty in speed = 2.07 × %
Incomplete question.The complete question is here
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 4.1 MJ when the flywheel is rotating at 14000 revolutions per minute.What is the moment of inertia of the flywheel?
Answer:
Moment of inertia=3.82 kg.m²
Explanation:
Given data
Energy E=4.1 MJ=4.1×10⁶J
Angular speed ω= 14000 rev/min= 14000×2π/60=1465.3 rad/s
To find
Moment of Inertia
Solution
A rotating flywheel must store its energy as kinetic energy
Let I be moment of inertia of the flywheel.We Know
Answer:
increases by a factor of 4.
Explanation:
The power dissipated through a resistor is I2RI2R
Current=IResistance=RPower=(current)2×(resistance)=I2RIf we double the current, P=(2I)2R=4I2RCurrent=IResistance=RPower=(current)2×(resistance)=I2RIf we double the current, P=(2I)2R=4I2R
Thus, doubling the current increases the power dissipated through a resistor by a factor of four.
Answer:
SPST-2
Explanation:
The terms post and pull are also used to describe the contact variations of the switch. The number of "poles" is the number of electrically separated switches that are controlled by a single physical actuator.
For example,
The "SPST" switch is single-pole, single-throw, a simple on / off switch: the two terminals are connected or disconnected from each other.
The "SPDT" switch is single pole, double throw, a simple interrupt changeover switch before making: C (COM, Common) is connected to L1 (NC, normally closed) or L2 (NO, normally open).
"DPST" is bipolar, single shot, equivalent to two SPST switches controlled by one circuit.
"DPDT" is bipolar, double throw, equivalent to two SPDT switches controlled by two circuits.
"3PDT" is 3 pole, double throw, equivalent to 3 SP and DT switches controlled by two circuits.
Explanation:
Neutral carbon-12 (or any carbon atom) has 6 electrons with a total negative charge of 6e- orbiting a nucleus with a total positive charge of 6e+, so that the total net charge is zero. The nucleus is made up of 6 protons, each with a positive charge of e+, and 6 neutrons, each with zero charge.