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Q1. What is the frequency shift of a 68 police radar signal when it reflects off a car moving at 117? (Radar waves travel at the speed of light.)
Express the answer using two significant figures.
Q2. As part of a safety investigation, two 1400 cars travelling at 18 are crashed into different barriers. Find out the average forces exerted on (a) car that hits a line of water barrels and takes 1.8 to stop, and (b) car that hits a concrete barrier and takes 0.4 to stop.
An object rotates about a fixed axis, and the angular position of a reference line on the object is given by ? = 0.60e8t, what are the magnitudes of the point's
A 30 gram mass is hanging from a spring whose unstretched length is 20 cm and whose spring constant is 2.5 N/m. In the list below are described 5 situations. In some of the situations, mass is at rest and remains at rest. In other situations, at the ..
Consider a diffraction grating with 7000. lines/cm with a screen 2.50 m away and 440. nm wavelength light. How many side maxima would be observed on one side of the central maximum
A woman slowly lifts a box weighing 48.0 N from the floor to a shelf 1.50 m above, Find the net work done on the box
A 3.3-mC charge is moved through a 150-V potential difference. How much work is required to move the charge
The length of a simple pendulum is 0.87 m and the mass of the particle (the "bob") at the end of the cable is 0.21 kg. What is the angular frequency of the motion
A wheel has a rotational moment of inertia I=150. It is accelerated by a constant torque from rest to a final angular velocity of 1.0. what is the value of the torque applied
In the rainy season, the amazon flows fast and runs deep. In one location, the river is 23m deep and moves at a speed of 4.0m/s toward the east. what is the potential (magnitude and sign) at the surface
An ambulance passes a bus stop at 50m/s with a siren of 340Hz, What is the wavelength heard by the bus stop costumers as the ambulance approaches
A Li-6 nucleus has a mass of 6.015121 u The mass of a single proton is 1.007276 u, What is the binding energy of lithium
In a semiclassical model of the hydrogen atom, the electron orbits the proton at a distance of 0.053 nm. What is the electron's potential energy
A 2.05 cm tall object is placed 30.0 cm to the left of a converginglens with a focal length f1 = 21.0 cm. How tall is thefinal image of the object
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