1- During an action potential, Na+Na+ ions move into the cell at a rate of about...
1- During an action potential, Na+Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s3×10−7mol/m2⋅s.
How much power must be produced by the "active Na+Na+ pumping" system to produce this flow against a +30−mV+30−mV potential difference? Assume that the axon is 60 cmcm long and 30 μmμm in diameter.
Express your answer using two significant figures.
2- A 4.80-mm length of 2.6-mmmm-diameter wire carries a 850 mAmA current when 19.0 mVmV is applied to its ends.
If the drift speed is 1.9×10−5m/s1.9×10−5m/s, determine the number nn of free electrons per unit volume.
Express your answer using two significant figures.
3- How many kWhkWh of energy does a 650-WW toaster use in the morning if it is in operation for a total of 6.0 minmin ?
Express your answer to two significant figures and include the appropriate units.
Homework Answers
Add Answer to:
1- During an action potential, Na+Na+ ions move into the cell at
a rate of about...
During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s....
During an action potential, Na+ ions move into the cell at a rate of about 3×10−7mol/m2⋅s. Part A How much power must be produced by the "active Na+ pumping" system to produce this flow against a +30−mV potential difference? Assume that the axon is 20 cm long and 20 μm in diameter. Express your answer using two significant figures. ANSWER: P = v
HW 11-1 Recall that the Na + concentration is significantly higher outside the cell than inside...
HW 11-1 Recall that the Na + concentration is significantly higher outside the cell than inside the cell. The symporter couples the "downhill" transport of two Na + ions into the cell to the "uphill" transport of glucose into the cell. If the Na + concentration outside the cell ( [ Na + ] out ) is 149 mM and that inside the cell ( [ Na + ] in ) is 19.0 mM, and the cell potential is −...
plz keep in mind sig figures and answer all 3 parts :) A 5.70-m length of...
plz keep in mind sig figures and answer all 3 parts :)
A 5.70-m length of 2.6-mm-diameter wire carries a 690 mA current when 23.0 mV is applied to its ends. reen Sh 07...13.1 Part A Determine the resistance R of the wire. Express your answer to two significant figures and include the appropriate units. reen Sh 07...13. uA R= Value Units Submit Request Answer Part B Determine the resistivity p. Express your answer to two significant figures and include...
Under certain circumstances, potassium ions K++ move across the 8.0-nm-thick cell membrane from the inside to...
Under certain circumstances, potassium ions K++ move across the
8.0-nm-thick cell membrane from the inside to the outside. The
potential inside the cell is -80.0 mV, and the potential outside is
zero. Assume that a potassium ion carries a charge of
1.602××10−19−19 C.
Unit 3: Prelecture Problems Problems: Electric Potential & Capacitor Deadline: 100% until Sunday, January 27 at 11:59 PM ▼ Cumulative Problem 6 Under certain circumstances, potassium ions K+ move across the 8.0-nm-thick cell membrane from the inside...
A lightning bolt transfers 30 C of charge to Earth through an average potential difference of...
A lightning bolt transfers 30 C of charge to Earth through an
average potential difference of 40 MV.
Unit 3: Prelecture Problems Problems: Electric Potential & Capacitor Deadline: 100% until Sunday, January 27 at 11:59 PM Cumulative Problem 4 A lightning bolt transfers 30 C of charge to Earth through an average potential difference of 40 MV. 1) How much energy is dissipated in the bolt? (Express your answer to two significant figures.) GJ Submit You currently have 0 submissions...
A red blood cell may carry an excess charge of about -2.5××10−12−12 C distributed uniformly over...
A red blood cell may carry an excess charge of about
-2.5××10−12−12 C distributed uniformly over its surface. The cells,
modeled as spheres, are approximately 6.6 μμm in diameter and have
a mass of 9.0××10−14−14 kg.
What is the surface charge density σσ on the red blood cell?
Express your answer in C/m22. (Express your answer to two
significant figures.)
Cumulative Problem 4 A red blood cell may carry an excess charge of about-2.5×10-12 C distributed uniformly over its surface....
1-Calculate the electric potential due to a dipole whose dipole moment is 3.8×10−30 C⋅mC⋅m at a...
1-Calculate the electric potential due to a dipole whose dipole moment is 3.8×10−30 C⋅mC⋅m at a point rr = 3.2×10−9 mm away. Suppose that r≫ℓr≫ℓ, where ℓℓ is the distance between the charges in the dipole. If this point is 60 ∘∘ above the axis but nearer the negative charge. Express your answer to two significant figures and include the appropriate units. 2- The charge on a capacitor increases by 15 μCμC when the voltage across it increases from 93...
Part A Review Which point, A or B, has a larger electric potential? (Figure 1) Previous Answers Correct Part B...
Part A Review Which point, A or B, has a larger electric potential? (Figure 1) Previous Answers Correct Part B What is the potential difterence between A and B? Assume that E- 1200V/m. Express your answer with the appropriate units. Figure 1 of 1 ar- 70 V B. 7 cm Previous Angwers Request Answer Submit Part A Review The metal spheres n (Figure 1) aro charged to ± 300 V Selact a plausible contour map of the potential, showing and...
plz keep in mind sig figures and answer all 3 parts :)
A 5.70-m length of 2.6-mm-diameter wire carries a 690 mA current when 23.0 mV is applied to its ends. reen Sh 07...13.1 Part A Determine the resistance R of the wire. Express your answer to two significant figures and include the appropriate units. reen Sh 07...13. uA R= Value Units Submit Request Answer Part B Determine the resistivity p. Express your answer to two significant figures and include...
Under certain circumstances, potassium ions K++ move across the
8.0-nm-thick cell membrane from the inside to the outside. The
potential inside the cell is -80.0 mV, and the potential outside is
zero. Assume that a potassium ion carries a charge of
1.602××10−19−19 C.
Unit 3: Prelecture Problems Problems: Electric Potential & Capacitor Deadline: 100% until Sunday, January 27 at 11:59 PM ▼ Cumulative Problem 6 Under certain circumstances, potassium ions K+ move across the 8.0-nm-thick cell membrane from the inside...
A lightning bolt transfers 30 C of charge to Earth through an
average potential difference of 40 MV.
Unit 3: Prelecture Problems Problems: Electric Potential & Capacitor Deadline: 100% until Sunday, January 27 at 11:59 PM Cumulative Problem 4 A lightning bolt transfers 30 C of charge to Earth through an average potential difference of 40 MV. 1) How much energy is dissipated in the bolt? (Express your answer to two significant figures.) GJ Submit You currently have 0 submissions...
A red blood cell may carry an excess charge of about
-2.5××10−12−12 C distributed uniformly over its surface. The cells,
modeled as spheres, are approximately 6.6 μμm in diameter and have
a mass of 9.0××10−14−14 kg.
What is the surface charge density σσ on the red blood cell?
Express your answer in C/m22. (Express your answer to two
significant figures.)
Cumulative Problem 4 A red blood cell may carry an excess charge of about-2.5×10-12 C distributed uniformly over its surface....
Part A Review Which point, A or B, has a larger electric potential? (Figure 1) Previous Answers Correct Part B What is the potential difterence between A and B? Assume that E- 1200V/m. Express your answer with the appropriate units. Figure 1 of 1 ar- 70 V B. 7 cm Previous Angwers Request Answer Submit Part A Review The metal spheres n (Figure 1) aro charged to ± 300 V Selact a plausible contour map of the potential, showing and...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago