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(a) A block of wood in the shape of a cube, 5.0 cm on a side, is floating in water with its top face parallel to the surface of the water. With a ruler, you measure that the top of the block sticks out of the water by 1.5 cm. What is the density of that piece of wood?
(b) A block of aluminum weighs 2.00 N when hung from a spring scale in air. The block is then dipped into a beaker of oil so that the block is fully submerged, and the spring scale now reads 1.41 N. What is the density of the oil?
An Olympic long jumper is capable of jumping 8.5m .Assuming his horizontal speed is 9.5m/s as he leaves the ground, How high does he go
A 2250 kg satellite used in a cellular telephone network is in a circular orbit at a height of 510 km abouve the surface of the earth. what is the gravitational force on the satellite
A gasoline engine takes in 1.70×10^4J of heat and delivers 3900J of work per cycle. What mass of fuel is burned in each cycle
A thin film of MgF_2 (n= 1.38) coats a piece of glass. Constructive interference is observed for the reflection of light with wavelengths of 500 nm and 625 nm
A male turkey is moving towards his mate at a speed of 20.0 m/s while gobblng at a frequency of 1800 Hz. what frequency of sound does the stationary hen turkey hear
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 20000 V. The speeds of the electrons are quite large.
An elevator moves downward in a tall building at a constant speed of 4.35 m/s. Estimate the highest floor from which the bolt can fall
Two sinusoidal waves of the same period, with amplitudes of 4.0 and 6.0 mm, travel in the same direction along a stretched string; they produce a resultant wave with an amplitude of 9.225 mm. The phase constant of the 4.0 mm wave is 0. What is the..
A small ball of mass, m = 8.60 × 10-9 g, has acquired an excess charge. The ball is then placed between two parallel plates spaced x = 3.45 mm, How many electrons did the ball gain or lose
The world record for a high jump from a standing position is 1.90 m. With what speed must a jumper leave the ground to the attain this height
A square loop 15.0cm on a side has a resistance of 8.05? . It is initially in a 0.395T magnetic field, Calculate the electric energy dissipated in this process
A narrow glass tube, open at one end, closed at the other, is 40cm long. find the wavelength of the resonant wave
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