College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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- Part A A 8.8×10-4 V/m electric field creates a 4.9x1017 electrons/s current in a 1.8-mm-diameter aluminum wire. What is the drift speed? Express your answer using two significant figures. "να ΑΣφ ? va = m/s Submit Request Answer Part B What is the mean time between collisions for electrons in this wire? Express your answer using two significant figures. T = Submit Request Answerarrow_forwardI need help with part f and g please.arrow_forwardIP Three resistors, R₁ = 30, R2 = 68 2, and R3 = R, are connected in parallel with a 12 V battery. Part A The total current flowing through the battery is 0.88 A. Find the value of resistance R. Express your answer using two significant figures. R= Submit Part B I1, I2, I3 = | ΑΣΦ Submit 3 Request Answer Find the current through each resistor. Enter your answers numerically separated by commas. Express your answers using two significant figures. [ΨΕΙ ΑΣΦ ? Request Answer Ω ? Aarrow_forward
- A standard 100 W (120 V) lightbulb contains a 7.0-cm-long tungsten filament. The high- temperature resistivity of tungsten is 9.0 × 10-7 Ω m. Part A What is the diameter of the filament? Express your answer with the appropriate units. d = Submit μÅ Value Request Answer Units ****** **** ?arrow_forwardA flash unit for a camera has a capacitance of 1800 uF . Part A What resistance is needed in this RC circuit if the flash is to charge to 90% of its full charge in 22 s? Express your answer using two significant figures. [ΨΕΙ ΑΣΦ R = Submit Previous Answers Request Answer ? ΚΩarrow_forward1 The combined electrical resistance R of two resistors R₁ and R₂, connected in parallel, is given by the equation below, where R, R₁, and R₂ are measured in ohms. R₁ and R₂ are increasing at rates of 0.6 and 1.9 ohms per second, respectively. = 1/² + 12/2₂2 R₁ At what rate is R changing when R₁ ohm/sec R 55 ohms and R₂ = 88 ohms? (Round your answer to three decimal places.)arrow_forward
- A box has a mass of 2.50 kg is at rest on a horizontal frictionless surface. Four forces act on the box. The four forces are: F₁ = 20.0 N (North), F₂ = 30.0 N (East), F3 = 15.0 N (South), and F4 = 40.0 N (West). What is the resulting acceleration of the box? Select one: a. b. C. d. 4.47 m/² @ 26.6° (North of West) 31.3 m/2 @ 26.6° (West of North) 31.3 m/2 @ 26.6° (North of West) 4.47 m/2 @ 26.6° (West of North)arrow_forwardA1arrow_forwardA circuit consists of a battery connected to three resistors (70 N, 30 N, and 170 2 ) in parallel. The total current through the resistors is 2.9 A Part A Find the emf of the battery. Express your answer using two significant figures. Πν ΑΣφ E = V Submit Request Answer Part B Find the current through 70 N resistor. Express your answer using two significant figures. ? I = Aarrow_forward
- An ammeter whose internal resistance is 60 2 reads 5.43 mA when connected in a circuit containing a battery and two resistors in series whose values are 500 n and 450 2. Part A What is the actual current when the ammeter is absent? Express your answer using two significant figures. I = Aarrow_forwarda R1= 62 R2= 102 R3= 162 E1= 8 V E2=4 V А. Write 3 equations we can use to find the current through each resistor in the circuit below. B. Find the currents I1, I2, 13 through the resistors R1, R2, R3arrow_forwardWires 1 and 2 are made of the same material. Wire 2 has 1/3 the length and 1/3 the diameter of wire 1. What are the ratios R₂/R₁ of the resistances of the wires? A) R₂/R₁ = 9 B R₂/R₁ = 3 C) R₂/R₁ = 1/3 D R₂/R₁ = 1/9 E None of the other answers is correctarrow_forward
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