A sound source produces a frequency of 400 Hz. The speed of the wave in the medium is 300 m/s. The source is not moving, but an observer is moving toward the source at a speed of 100 m/s. What frequency does the observer hear ? A. 133 Hz B. 266 Hz C. 300 Hz D. 533 Hz E. 633 Hz

Q: car of mass m is negotiating a circular turn of radius R and speed v. The forces on the car are…

A: Given, A car of mass m is negotiating a circular turn of radius R and speed v

Q: Work equals force times

A: Work is a measure of the energy used in applying a force to move an object.

Q: Can there be a net force on an object and have no work done to it? Defend your answer.

A: let the net force acting on the object be "F"  and displacement of the object due to this force is…

Q: Am = 0.60 kg mass attached to a spring constant k= 90 N/m is undergoing simple harmonic motion on a…

A: Given data:  Mass (m) = 0.60 kg Spring constant (k) = 90 N/m Amplitude (x) = 0.1 m Required:…

Q: A 3kg book is held 2m above the floor for 40 seconds. The work done is ___?

A: GIven data: The mass of the book is m=3 kg The height is h=2 m The time is t=40 s

Q: An apple weighing 1 N falls throughas a distance of 1 m. How much work is done on the apple by the…

A: weight of apple(W)= 1N Distance(d)=1m Work done=F.d=Fdcosθ F is force θ is angle between force and…

Q: A car speeds up from 10.0 m/s to 30.0 m/s in 3.0s. What is it’s acceleration? Please show the work,…

A: Initial velocity is Final velocity is Time is Find:Acceleration of the vehicle.

Q: 2. The position of a particle between t = 0 and t = 2.00s is given by r(t) = (3.00 m/s³)³-(10.0…

A: Given:- equation of motion is given as  x(t) = 3.00 m/s3t3-10.00m/s3t2+9.00m/st This is a position…

Q: What is the net force of a 5.0-N force and an 8.0-N force acting on an object for each of the…

A: Given values:Force, F1 = 5.0 N       Force, F2 = 8.0 N

Q: A force of 3 pounds stretches a spring 1 inch from its natural position. Find the work (in in-lb)…

A: Given: Force applied on spring = 3 Pounds stretch in spring = 1 inch

Q: A cannon fires a projectile with a speed of 110 m/s at a 30° to the horizontal. The opening of the…

A: Speed of the projectile = v = 110m/s Mass of the projectile = m = 7.0 kg Angular Velocity of the…

Q: 1. Using the steps for node voltage analysis to solve for the node voltages. Then, calculate the…

A:

Q: 11. Two wires carries currents as shown (I1 = 100 A in the +y direction and I2 = 20 A in the -x…

A: Recall B=μ0i/2πrWhere B is magnetic field at a distance r from long conductor having current i.

Q: Is work a vector quantity? In other words does it need a direction associated with it ?

A: To define work we just need magnitude and not direction. Also work is the dot product of two vector…

Q: Suppose that 3J  of work is needed to stretch a spring from its natural length of  30cm to a length…

A:

Q: You’re fishing from a tall pier and have just caught a 1.5 kg fish. As it breaks the surface,…

A: mass of fish (m) = 1.5 kg Tension (T) = 16 N distance moved in vertical direction (h) = 2 m

Q: ball is dropped from an initial height of 25.0 m off of a cliff. How ling does it take the ball to…

A:

Q: You and your friend Gandalf are mowing lawns for extra spending money. Gandalf pushes his mower 20 m…

A: Given data:  Displacement (d1) = 20 m Force (F1) = 100 N Force (F2) = 40 N The work done by both…

Q: In a dog race, a dog accelerates from a speed of 4 m/s to a speed of 9 m/s over a distance of 50…

A: Given data:   Initial velocity (u) = 4 m/s Final velocity (v) = 9 m/s Distance (d) = 50 m Required:…

Q: 6. A hydraulic lift is to be used to lift a 2100-kg weight by putting a weight of 30 kg on a piston…

A: “Since you have posted multiple questions, and picture quoted in question number 5 is not given then…

Q: how much work does Ryan to dom to lift a 2.0 x 101 Kg bag of potatoes to his shoulder, 1.7 m above…

A: Given Mass of the bag m = 2.0 x 101 kg Height h = 1.7 m