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Two rockets are approaching each other along a straight line. A observer on the Earth measures a velocity of .6c for each rocket.
What does an observer in one of the rockets measure for the speed of the other rocket?
a) .6c b) .7c c) .8c d) .9c e) .95c f) .995c
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. The sound level of this creature has been measured as high as 100 dB. (a) Calculate the intensity of the sound wave ..
A double-concave lens has equal radii of curvature of 15.1 cm. An object placed 14.2 cm from the lens forms a virtual image 4.94 cm from the lens. What is the index of refraction of the lens material
A 2.5 kg particle-like object moves in a plane with velocity components vx = 40 m/s, What is its angular momentum relative to the origin at this moment
Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 3.0m and is released with a speed of 10m/s
Assume the electric field near the northwest corner of your table is uniform at 3x10^4N/C. We assign 0 as the value of electric potential at the corner. What is the potential 2cm south of the corner?
sound produced at a point is heard by a person after 5 second while the same sound is heard by another person after 6
A long solenoid with 9.07 turns/cm and a radius of 7.04 cm carriesa current of 20.0 mA. What is the magnitude of the magnetic field there
A crate of mass 10.0 kilogram is pulled up a rough incline with an initial speed of 1.47 m/s. Calculate what is the change in kinetic energy of the crate
A toaster rated at 1 050 W operates on a 120-V household circuit and has a 4.00-m length of nichrome wire as its heating element. The operating temperature of this element is 320°C. What is the cross-sectional area of the wire?
two people carry a heavy electric motor by placing it on a light board 2.00 m long. one person lifts at one end with a
Running into the train at that speed would severely damage both train and passengers. How far does the train then travel while being slowed to a stop
The tires of a car make 75 revolutions asthe car reduces its speed uniformly from 100 km/h to 50 km/h. Thetires have a diameter of 0.80 m. What was the angular acceleration?
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