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A car travels east at 87 km/h for 1.4 h. It then travels30.0° east of north at 107 km/h for 0.8 h.
(a) What is the average speed for the trip?
(b) What is the average velocity for the trip?
Instead of using batteries, a certain type of flashlight has a built in hand pump which you can squeeze to generate the power necessary to light the bulb, what will be the potential difference across the light bulb
A glass plate having parallel faces and a refractive index of 1.54 lies at the bottom of a liquid of refractive index 1.62. Compute the angle of refraction of this light in the glass
A bird sits on a telephone wire midway between two poles 20 meters apart. The wire, assumed weightless, sags by 50 cm. If the tension in the wire is 90 Newtons, what is the mass of the bird?
A projectile is launched from ground level to the top of a cliff which is 195m away and 155 m high, find the initial velocity of the projectile
In a physics laboratory experiment, a coil with 210 turns enclosing an area of 13cm^2 is rotated from a position, What is the average emf induced in the coil
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. Calculate the intensity of the sound wave emitted
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800 , length 84.4, Calculate the weight of the rod
An air molecule is moving at a speed of 450 m/s. How many meters would the molecule move during 7.00 ms (milliseconds) if it didn't collide with any other molecules.
The electric field within the membrane separating the inside and outside of a biological cell is approximately 7.5 MV/m and is essentially uniform. what is the potential difference across the membrane
the plane of a flat, circular loop of wire is vertical. An external B-field is directed perpendicular to the plane of the loop. What is the direction of the external magnetic field
A potter's wheel is a uniform solid disk of diameter 0.72m and a mass of 60kg. the wheel is initially spinning at a rate of 85 rev/min. what is moment of inertia of the disk
During the initial charge of a capacitor up to its max charge Vo, the initial energy stored in the capacitor is 1/2(CVo)^2 . Show mathematically that this energy is equal to the total energy dissipated as heat in the resistance through which discharg..
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