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Solid rock suspended in air by spring scale has m=2.50 kg, When rock submerged in water, mass = 1.90 kg, When rock submerged in unknown liquid m = 1.25 kg
a) find volume of rock,
b) Density of rock,
c) Density of unknown liquid. (need to see step on how it's worked out)
An elementary particle called a pi meson (or pion for short) has an average lifetime of 2.6×10?8s when at rest. Find the average distance traveled by the pion as measured by the same observer
A rifle is aimed horizontally at a target 1,234.37 m away. What is the bullet's time of flight
The He-Ne laser shines through a slit in the diffraction plate that is 50 cm from the screen. What fringe spacing would you expect for slits E and F if the stated slit spacing is correct? What difference must there be between the patters produced ..
A 1200 kg car coasts in neutral down a 2.0° hill. The car attains a terminal speed of 23.0 m/s. How much power must the engine deliver to drive the car on a level road at 23.0 m/s
If the coefficient of static friction is 0.500, what minimum force magnitude is required from the rope to start the crate moving
A 94 g stone is whirled in a horizontal circle on the end of a 73 cm long string. The stone takes 1.10 s to make each complete revolution. Conclude the angle that the string makes with the horizontal.
A 200-kg crate is pushed horizontally with a force of 715 N. If the coefficient of friction is 0.20, compute the acceleration of the crate.
What are the magnitude and direction of the resultant vector R , when the parallelogram law is applied to A and B?
Scientists plan to release a space probe that will enter the atmosphere of a gaseous planet. What is the approximate temperature at this altitude
Consider a 10-kg block resting on a frictionless plane inclined 30 o connected by a rope through a pulley to a 10-kg block hanging free. What is the direction and magnitude of the resulting acceleration of the 2-block system?
A freezer has a coefficient of performance of 2.40. The freezer is to convert 1.98kg of water at 26.0 oC to 1.98kg of ice at -5.00 oC in 1 hour. How much wasted heat is rejected to the room in which the freezer sits
Two identical probes are sent along the same path toward a neutron star. Find the distance between the center of mass of the two probe system
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