PHY 231 Recitation for August 10, 2021 Beatrice stands beside the tracks as a train rolls past. She notes that the frequency of the train whistle is 465 Hz when approaching and 441 Hz when receding. How fast was the train moving?

Q: Neview I IStanS A bullet of mass m is fired into a block of mass M that is at rest. The block, with…

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Q: considering a singularity a given mass, We cah de ne thế Padlt horizon by calculating the distance…

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Q: Energy Conservation With Conservative Forces: When you drop a pebble from height H, it reaches the…

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Q: A solid cylinder with a rotational inertia of (1/2)MR2 is released from rest and rolls without…

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Q: Conversion of Units: A plot of land contains 5.8 acres. How many square meters does it contain? (1.0…

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Q: 1. Circle each of the following statements that are true. Think carefully and be sure that you could…

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Q: What does it mean for something to have energy?

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Q: Free Fall: A 10-kg rock and a 20-kg rock are thrown upward with the same initial speed vo and…

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Q: A space ship is currently flying through space with a velocity of 95 m/s. They decide to slow down…

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Q: General Questions: You are in a train traveling on a horizontal track and notice that a piece of…

A: Given statement : " you are in a train travelling on a horizontal track and notice that a piece of…

Q: Dimensional Analysis: When adding several quantities the quantities can have any combination of…

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Q: A ski starts from rest and slides down a 28° incline 55 m long. • Part A If the coefficient of…

A: Given data: Angle of inclination, θ=280 Distance covered, d=55 m Coefficient of friction, μ=0.090

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Q: A 2.00-mol sample of a diatomic ideal gas expands slowly and adiabatically from a pressure of 5.08…

A: Given : n = 2.00 mol P = 5.08 atm V = 12.8 L V' = 29.8 L

Q: 1)What is the magnitude of F between two charges of 5.0 pC separated by 1.0mm?

A: The force between the two charge particles is given by  F = k q q'r2

Q: Part A Free Fall: A ball is thrown straight up, reaches a maximum height, then falls to its initial…

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Q: An object sitting on the edge of a table. A bullet shot up into the air before it gets to the top. A…

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Q: A jet is flying through a wind that is blowing with a speed of 55 mi/h in the direction N 30° E (see…

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Q: 7.A tennis ball rolls off the lab bench with an initial velocity of 3.0 m/s. The top of the lab…

A: Answer:- Therefore Let d = distance d = ut +( 1/2 )gt2 But u =0 d = (1/2) gt2 gt2 = 2d  t2 = 2d / g…

Q: midal fransformer has 20tums on its pomary Side and ao tpns ansts Selonderey Side the primany she…

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Q: A vector has an x component of -25.5 units and a y component of 37.6 units. Find the magnitude and…

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Q: 3. Write a nuclear equation for the beta emission decay of: a. 9Co b. c. 2Pb 824

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Q: Part A Equilibrium: A push of magnitude Pacts on a box of weight Was shown in the figure. The push…

A: Given, The diagram, The push force acting on the block is P,

Q: 60. How much work is done on a to lift it 0.50 meter? A. 600 joules C. 150 joules B. 300 joules D.…

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Q: An Atwood machine consists of two masses, ma = 7.0 kg and mg= 9.0 kg, which are connected by a rope…

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Q: (Figure 1) The car shown in the figure has mass m (this includes the mass of the wheels). The wheels…

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Q: @) Paul's Auto Repair sign with a mass of 20-Kg hangs from the end of a uniform 15-Kg beam as shown…

A: Let's first consider the following schematic of the forces that act on the system. Here, M is the…

Q: E www R₁ R₂ www ww R3 Part C Derive an expression for the power being dissipated in R3 for (Figure…

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Q: A spring (k = 200 N/m) is fixed at the top of a frictionless plane inclined at angle 0 = 30°. A 1.9…

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Q: 51. || A physics student on Planet Exidor throws a ball, and it follows the parabolic trajec- tory…

A: Given:ball is at max height at , t = 2.0 stherefore time of flight, T = 2×2.0 = 4.0 sat t= 1.0 s,…

Q: A 50-watt lightbulb and a 100-watt lightbulb are each operated at 100 volts. Compared to the…

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Q: ww R₁ R₂ www www R3 Part C Derive an expression for the power being dissipated in R3 for (Figure 2).…

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Q: 1.7. If a marble is launched straight upward at a speed of 15 m/s and doesn't hit anything on its…

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Q: 2. A car moving at a speed of 2m/s accelerates and move at a speed of 30m/s. If the car accelerates…

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Q: 2. A stack of bricks with mass m=200 kg is sitting on a frictionless ramp, connected to a rope as…

A: Given that:- Mass of the stack of bricks=m=200kg

Q: A car drives straight off the edge of a cliff that is 104 m high. The police at the scene of the…

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Q: Identify if the work done by the electric force is + or – in the figures below. Then determine if…

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Q: Estimation: A reasonable estimate for the duration of a typical physics lecture is 3500 s. 600 s.…

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Q: I Review | Constants In 2000, NASA placed a satellite in orbit around an asteroid. Consider a…

A: In this question we have to find the orbital speed of the satellite and the escape speed of the…