Question

1- What is the current in amperes if 1300 Na+Na+ ions flow across a cell membrane...

1- What is the current in amperes if 1300 Na+Na+ ions flow across a cell membrane in 3.2 μsμs ? The charge on the sodium is the same as on an electron, but positive.

Express your answer to two significant figures and include the appropriate units.

2- What voltage will produce 0.45 AA of current through a 4800-ΩΩ resistor?

Express your answer to two significant figures and include the appropriate units.

3- An electric device draws 4.60 AA at 240 VV.If the voltage drops by 35 %% , what will be the current, assuming nothing else changes?

Express your answer to two significant figures and include the appropriate units.

b- If the resistance of the device were reduced by 35 %% , what current would be drawn at 240 VV?

Express your answer to two significant figures and include the appropriate units.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider an LR circuit when a 50.0-Hz 240-V rms ac voltage is applied, where R =...
Consider an LR circuit when a 50.0-Hz 240-V rms ac voltage is applied, where R = 2.30 kΩ , and L = 410 mH . What is the rms current the circuit? Express your answer to three significant figures and include the appropriate units. What is the phase angle between voltage and current? Express your answer using three significant figures. How much power is dissipated? Express your answer to three significant figures and include the appropriate units. What are the...
A 14.0-m length of wire consists of 9.0 m of copper followed by 5.0 m of...
A 14.0-m length of wire consists of 9.0 m of copper followed by 5.0 m of aluminum, both of diameter 1.3 mm . A voltage difference of 95 mVis placed across the composite wire. The resistivity of copper is 1.68×10−8Ω⋅m and the resistivity of aluminum is 2.65×10−8Ω⋅m. 1. What is the total resistance (sum) of the two wires? Express your answer to two significant figures and include the appropriate units. 2. What is the current through the wire? Express your...
The graph in (Figure 1) shows the current through a 2.0 ΩΩ resistor as a function...
The graph in (Figure 1) shows the current through a 2.0 ΩΩ resistor as a function of time. Figure 1 of 1The plot shows the current as a function of time. Time is measured from 0 to 10 seconds on the x axis. Current is measured from 0 to 2.5 amperes on the y axis. First the current stays at 0 amperes from the origin until 2 seconds. Then it jumps to 2.5 amperes and remains at this value until...
1. How much does it cost to operate a 120-W lightbulb for 25 min if the...
1. How much does it cost to operate a 120-W lightbulb for 25 min if the cost of electricity is $0.086 per kilowatt-hour? 2. A 75-V battery supplies 3.9 kW of power. How much current does the battery produce? Express your answer to two significant figures and include the appropriate units. 3. A battery connected to a 140-? resistor dissipates 2.5 W of power. If the circuit contains only the battery and the resistor, what is the voltage of the...
Please Answer all 3 completely! Thank you <3 1. In an integrated circuit, the current density...
Please Answer all 3 completely! Thank you <3 1. In an integrated circuit, the current density in a 2.4-μm-thick × 72-μm-wide gold film is 7.0×105 A/m^2 Part A: How much charge flows through the film in 15 min? Express your answer to two significant figures and include the appropriate units. 2. The current in an electric hair dryer is 10 A . How many electrons flow through the hair dryer in 5.8 min ? Express your answer using two significant...
Suppose a 20-kW radio station emits EM waves uniformly in all directions. Part A How much...
Suppose a 20-kW radio station emits EM waves uniformly in all directions. Part A How much energy per second crosses a 1.4 m2 area 1 km from the transmitting antenna? Express your answer to two significant figures and include the appropriate units. Part B What is the rms magnitude of the E⃗ field at this point, assuming the station is operating at full power? Express your answer to two significant figures and include the appropriate units. Part C What is...
It takes 2.25 ms for the current in an LR circuit to increase from zero to...
It takes 2.25 ms for the current in an LR circuit to increase from zero to 0.66 its maximum value. Part A Determine the time constant of the circuit. Express your answer to two significant figures and include the appropriate units. Part B Determine the resistance of the circuit if 35.0 mH . Express your answer to two significant figures and include the appropriate units.
The voltage across a 65 μFμF capacitor is described by the equation vC=(18V)cos(200t)vC=(18V)cos⁡(200t), where tt is...
The voltage across a 65 μFμF capacitor is described by the equation vC=(18V)cos(200t)vC=(18V)cos⁡(200t), where tt is in seconds. Part A What is the voltage across the capacitor at ttt = 0.016 ss ? Express your answer with the appropriate units. VV = SubmitPrevious AnswersRequest Answer Part B What is the capacitive reactance? Express your answer with the appropriate units. XCXC = nothing SubmitRequest Answer Part C What is the peak current? Express your answer with the appropriate units.
Please show the steps 1) What is the magnitude of the electric field a distance 1.5...
Please show the steps 1) What is the magnitude of the electric field a distance 1.5 mm from an electron? E=? 2) Three point charges are placed on the x-axis as follows: 22 μC at x=0; 30 μC at x=0.60m; and -10 μC at x=1.2m. A) Find the net force on the 22 μC point charge. Assume the direction of the x-axis as positive. Express your answer to two significant figures and include the appropriate units. F1=? B) Find the...
The wires leading to and from a 0.12-mm-diameter lightbulb filament are 1.5 mm in diameter. The...
The wires leading to and from a 0.12-mm-diameter lightbulb filament are 1.5 mm in diameter. The wire to the filament carries a current with a current density of 4.1×105 A/m2 a. What is the current in the filament? Express your answer to two significant figures and include the appropriate units. b.What is the current density in the filament? Express your answer to two significant figures and include the appropriate units.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT