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Juan aims his boat directly across a river flowing at 8 miles/hour. Juan's boat travels at 6 miles/hour in still water. How fast does Juan travel relative to shore?
A five-slit system with 7.8 um slit spacing is illuminated with 615 nm light. Find the angular positions of the first two maxima
the fastest served tennis ball served by big bill tilden in 1931 was measured at 73.14 ms . the mass of a tennis ball
An air puck of mass m1 = 0.21 kg is tied to a string and allowed to revolve in a circle of radius R = 0.8 m on a frictionless horizontal table. What is the horizontal force acting on the puck
The isotope Po (A-218 Z-84) can decay by either alpha or beta emission. What is the energy release in each case
A concrete slab is 12.5 centimeter thick and has an area of 4.3 m2. Find what minimum power must be supplied to the coils to maintain a temperature difference of 23.5°C between the bottom of the slab and its surface
A beam of unpolarized light shines on a stack of five ideal polarizers, set up so that the angles between the polarization axes of pairs of adjacent polarizers are all equal. The intensity of the transmitted beam is reduced from the intensity of the ..
A jeweller’s lens of focal length 1.7 cm is utilized as a magnifier. With the lens held near the eye, decide the following. What is the object distance giving the maximum magnification? What is the angular magnification when the object is at the foca..
An amusement park ride consists of a rotating circular platform 8.00 meter in diameter from which 11.0 kilogram seats are suspended at the end of 2.50 meter mass less chains. Determine the speed of each seat
The closest star to our solar system is Alpha Centauri, which is4.30 light years away. A spaceship with a constant speed of 0.800c relative to the Earthtravels toward the star. How much time would elapse on a clock on board the spaceship?
In an experimental radiation therapy, an equivalent dose of 0.400rem is given to a localized area of tissue with a mass of 0.120kg by 0.800MeV protons. How many protons are absorbed by the tissue
An ice chest at a beach party contains 11cans of soda at 6°C. Each can of soda has a mass of 0.34 kg and a specific heat capacity of 3900 J/(kg·°C).Someone adds a 6.3 kg watermelon at25°C to the chest. The specific heat capacity of watermelon is near..
A rock is tossed straight up with a velocity of 40.0 m/s.When it returns, it falls into a hole 11.5 m deep. What is therock's velocity as it hits the bottom of the hole?
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