The current in the wire varies with time according to the relation I = 55 A –(0.65 A/s^2)t^2. a. How many coulombs of charge pass a cross-section of the wire in the time interval between t = 0 and t = 8.0 s? b. What constant current would transport the same charge in the same time interval? Note: In problem 2, A means ampere, s means second.

The current in the wire varies with time according to the relation I = 55 A –(0.65 A/s^2)t^2. a. How many coulombs of charge pass a cross-section of the wire in the time interval between t = 0 and t = 8.0 s? b. What constant current would transport the same charge in the same time interval? Note: In problem 2, A means ampere, s means second.

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter1: Units And Measurement

Section: Chapter Questions

Problem 15P: Use the orders of magnitude you found in the previous problem to answer the following questions to...

See similar textbooks

Similar questions

Directions: Solve for the given problems. Show your complete solutions.Round off your answers into the proper number of significant figures.1. Copper has 8.5 x 1028 free electrons per cubic meter. A 75.0-cm length ofcopper wire with a diameter of 2.05 mm, carries 4.97 A of current.a. How much time does it take for an electron to travel the length of thewire?b. Repeat (a) for a wire with a diameter of 4.12 mm of the same length thatcarries the same current.c. How does changing the diameter of the wire affect the drift velocity ofthe electrons in the wire?
Activity 2 Directions: Solve for the given problems. Show your complete solutions. Express your final answers into 3 significant figures. 1. Silver is composed of 5.8 x 1028 free electrons per cubic meter. If a silver wire with a diameter of 1.8 mm can allow charges of 360 C to flow in 1 hour, a. What is the current in the conducting wire? b. What is the magnitude of the drift velocity of the electrons in the conducting wire? 2. A wire has a radius of 1.90 mm. If the current in the wire is 6.14 A, the drift velocity is 4.86 x 10-5 m/s. What is the concentration of free electrons in the metal?
Directions: Solve for the given problems. Show your complete solutions.Round off your answers into the proper number of significant figures.2. A metallic wire has a diameter of 3.80 mm. When the current in the wire is7.20 A, the drift velocity is 4.86 x 10-5 m/s. What is the density of the freeelectrons in the metal?
Practice Task 1. Consider the following satements below. Express each number in standard notation or in scientific notation as indicated. Express your solution. 1. The length of an electronic component is 0.0001265 mm. Write this in scientific notation. 2. The diameter of human immunodeficiency virus (HIV) os 0.00012 mm. What is the diameter if HIV in scientific notation? 3. Rocks around Mayon Volcano aged more than 20 000 000 years old. Express this number in scientific notation.4. The friction between the ocean and the ocean floor due to tides is causing the Earth's rotation to slow down by about 2 x 10-8 seconds per day. What real number is equivalent to 2 x 10-8?5. The radius of a hydrogen atom is 2.5 x 10-11, Express this number in standard notation.
Solve for the given problems. Show your complete solutions. Round off your answers into 3 significant figures Refer to figure 7. a. Find the current in the circuit. b. Find the terminal voltage Vab of the 16.0-V battery. c. Compute for the potential difference Vac.
Answer the following. Write your solution and box your final answer on each question. 1. What charge flows past a point in a wire in 6.0 s if the wire carries a current of 2.0 A? 2. If a circuit element can withstand a maximum current of 15 A, how many electrons can pass through it each second?3. How many electrons are transferred in a 10.0 A current that runs for 3.0 s?4. If 2.00 × 102mA of current flows through the filament of a light bulb, how many electrons would pass through the filament in 30.0 s?5. What feature of a river is most similar to current in an electric circuit? (A) The depth of the river measured in meters (B) The temperature of the water measured in degrees Celsius (C) The vertical drop between two points along the river measured in meters (D) The volume of water moving past a point measured in liters per second
Solve the following problems. Round your answers to 2 decimal places. Start your solution with differential equations and not derived equations. Metals A and B were taken out from a boxed furnaces both at 400 deg C. The ambient temperature, where the metals were exposed is at 25 deg C. It took 1 minute for metal A to reach 100 deg C. Determine the temperature of Metal B in deg C, 2 minutes after it was taken out from the furnace to the new temperature. It is known that kA= 3.5 kB.
Directions: Solve for the given problems. Show your complete solutions. Round off your answers into 3 significant figures. 3. An ideal voltmeter is connected to a 2.0-Ω resistor and battery with emf of 5.0 V and an internal resistance of 0.5 Ω as shown in figure 6. a. What is the current in the 2.0-Ω resistor? b. What is the terminal voltage of the battery? c. What is the reading on the voltmeter?
PROBLEM SOLVING: Solve the following problems completely, neatly and orderly. Express all answers to the nearest 4th decimal place. 2. A hypothetical alloy has a face-centered cubic unit cell. Its density is 10,470 kg/m3 and its atomic weight is 106.8 g/mole. a) What is the atomic radius of the alloy in cm? b) What is the volume of the single atom of the alloy in cm?
Consider the graph shown below. a. Identify what the graph shows b. Briefly explain what kind of information you can determine from the graph and how that information could be useful in its application related to the field of health sciences. In your answer: a. Make specific reference to any values you can read from the graph. b. Include any appropriate equations for the graph and explain how they could be used. 100% 90% 80% 70% 60% 50.00% 50% 40% 30% 25.00% 20% 12.50% 10% 6.25% 3.13% 1.55% 0.78% 0.39% 0% 16 24 32 40 48 56 64 Elapsed time (in days) parent isotope (%)
Directions: Solve for the given problems. Show your complete solutions.Round off your answers into the proper number of significant figures.1. What diameter must a copper wire have if its resistance is to be the sameas that of an equal length of aluminum wire with diameter 3.45 mm?
Use the orders of magnitude you found in the previous problem to answer the following questions to within an order of magnitude. (a) How many electrons would it take to equal the mass of a proton? (b) How many Earths would it take to equal the mass of the Sun? (c) How many Earth-Moon distances would it take to cover the distance from Earth to the Sun? (d) How many Moon atmospheres would it take to equal the mass of Earth’s atmosphere? (e) How many moons would it take to equal the mass of Earth? (f) How many protons would it take to equal the mass of the Sun? For the remaining questions, you need to use Figure 1.4 to obtain the necessary orders of magnitude of lengths, masses, and times.