Calculate to the accuracy of 10%
Suppose you measure the terminal voltage of a 0.2-Volt alkaline...
Calculate to the accuracy of 10%
Suppose you measure the terminal voltage of a 0.2-Volt alkaline
cell having an internal resistance of 0.3 Ω by placing a 8.6-kΩ
voltmeter across its terminals. Find the terminal voltage U.
A 10-volt voltage source is connected in a series
arrangement with two resistors (R1 = 7 ohms, R2 = 3 ohms). The
current flowing in each resistor is:
a) 1.8 amperes b) 45
amperes c) 0.05 amperes d) 1
ampere e) 3.5 amperes
What is the voltage across R2 in the above circuit?
a) 2 volts b) 10
volts c) 3 volts d) 0.25
volts e) 5 volts
3. If R1 and R2 are now
connected in parallel, what...
The Gaia satellite will measure parallaxes with an accuracy of 2
× 10−5 arcsec for stars with V < 15.
(a) What is the distance d of an M5 I supergiant with
log(L/Lʘ) = 5.50 and BC = −3.70 that has V = 12, if the
effect of interstellar extinction is ignored?
(b) What is the relative distance accuracy σ(d)/d of such a
star?
(c) Assuming that Teff is known, what is the relative
accuracy in radius σ(R)/R?
Hi-Volt Components You are the IT manager at
Hi-Voltage Components, a medium-sized firm that makes specialized
circuit boards. Hi-Voltage's largest customer: Green Industries,
recently installed a computerized purchasing system. If Hi-Voltage
connects to the purchasing system, Green Industries will be able to
submit purchase orders electronically. Although Hi-Voltage has a
computerized accounting system, that system is not capable of
handling EDI.
Tasks
1. What options does Hi-Voltage have for developing a
system to connect with Green Industries Purchasing system?
2....
1.You measure the velocity of an electron to an accuracy of
±22.6 m/s. What is the minimum uncertainty in its position? (h =
6.626 × 10-34 J ∙ s, melectron = 9.11 × 10-31 kg)
A 32.2 μm
B4.03 μm
C5.12 µm
D 8.05 μm
E16.1 μm
2.A 10-g bouncy ball is confined in a 8.3-cm-long box. What is
its minimum energy? (h = 6.626 × 10-34 J ∙ s)
A.8.1 × 10-65 J
B.9.4 × 10-75 J
C.3.2 ×...
Calculate the conjugate base to acid ratio in Solution D (10 mL
of 0.2 M acetic acid and 1 mL of 0.1 M sodium hydroxide, and 9 mL
distilled water). Then calculate the theoretical pH.
Initial pH: 3.47
Molarity of HCl:
0.0992 about 0.3 mL
added
pH after HCl addition: 3.09
Molarity of added NaOH:
0.0997M about 0.2
mL
added
pH after NaOH addition: 3.54
Suppose that you are designing a parachute so that the terminal
velocity using the parachute will be the same as the velocity at
the end of a normal (frictionless) jump from a height of 2.80 m. If
the parachute exerts a drag force of - b v where v is in meters per
second and if the parachute is designed for an 70.0 kg person, what
is b?
Suppose you toss a fair coin 10 times.
(a) Calculate the probability of getting at least 6 heads, using
the exact distribution.
(b) Now repeat the calculate above, but approximate the
probability using a normal random variable. Do your calculation
both with and without the histogram correction. Which one is closer
to the true answer?
Now suppose you toss a fair coin 1000 times.
(c) What is the probability of getting at least 520 heads? You
can approximate this using...
I have a Li-ion cell I need to measure the cell voltage which is
unknown. you need to measure the voltage of the battery. You can
design the circuit which measures voltage. I need a circuit diagram
with explanation. don't say use voltmeter instead you can draw an
internal diagram of how it is working.....
Suppose you are a nurse working with a 75 year old patient who
has a terminal illness: her condition will slowly destroy her
muscle function until she is unable to swallow and becomes
paralyzed. She is very close to becoming totally dependent on
others now, and (because her mind is not affected) the patient
requests that you inject her with overdose of pain medication to
help her have a peaceful death and avoid the suffering and slow
death the disease...