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Amber (n = 1.546) is a transparent brown-yellow fossil resin. An insect, preserved and trapped within the amber, appears to be 2.9 cm beneath the surface, when viewed directly from above. How far below the surface is the insect actually located?
Atoms in a solid are in continuous vibrational motion due to thermal energy. find the approximate period of oscillation of a typical atom
question cesium atoms are the largest naturally occurring atoms. the radius of a cs atom is 2.62 angstroms. how many cs
An engine absorbs 1.72 kJ from a hot reservoir at 277°C and expels 1.24 kJ to a cold reservoir at 27°C in each cycle. What is the power output of the engine if each cycle lasts 0.303 s
A 0.14-kg balloon is filled with helium (density = 0.179 kg/m3). If the balloon is a sphere with a radius of 5.3 m, what is the maximum weight it can lift
A 2500 kg car rounds a flat curve of radius 75 m at speed of 80 km/h. if the pavement is icy and the force of static friction is 6000 n, what is the maximum speed the car could safely go around the curve
The coefficient of kinetic friction for a 22 kg bobsled on a trackis 0.25. What force is required to push it down a 6.0° incline and achieve a speed of 68 km/h at the end of 75 m
An 1865 kg airplane starts at rest on an airport runway at sea level. (a) What is the change in mechanical energy of the airplane if it climbs to a cruising altitude of 2420 m and maintains a constant speed of 96.5 m/s?
A proton in the upper atmosphere moves at 9.8×105m/s , perpendicular to Earth's magnetic field, Find the curvature radius of the proton's trajectory
An ideal gas is kept in a container of constant volume. Thepressure of the gas is also kept constant. The number of moleculesin the gas is halved. what is the final rms speed
a rocket is fired at a speed of 72.0 ms from ground level at an angle of 50.0 deg above the horizontal. the rocket is
A 2.40kg mass is pushed against a horizontal spring of force constant 26.0N/cm on a frictionless air table. The spring is attached to the tabletop, Find the greatest speed the mass reaches
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 53.0 centimeter. Find the value of the acceleration of gravity on this planet
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