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Consider an airplane that normally has an air speed of 90 km/h in a 95 km/h crosswind blowing from west to east. Calculate its ground velocity when its nose is pointed north in the crosswind.
What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have
Between each pair of vertebrae in the spinal column is a cylindrical disc of cartilage. How far does the top surface move relative to the bottom surface
A certain mass oscillates without friction on the end of a horizontal spring. At time t= 1.20 s, the mass is at position x= 0.120m (measured from the equilibrium location), has velocity of v= 14.5m/s, and is accelerating at a = -98.0m/s^2
Light from a helium-neon laser (wavelength=649 nm) passes through a circular aperture and is observed on a screen 2.36 m behind the aperture
if the radius of curvature of the concave mirror is 15 cm, what is the position,nature and magnification of the image
Two particles each have a mass of 5.80 10-3 kg. One has a charge of +5.0 10-6 C, and the other has a charge of -5.0 10-6 C. They are initially held at rest at a distance of 0.70 m apart. Both are then released and accelerate toward each other. How fa..
Blood from an animal is placed in a bottle 2.0m above a 3.5cm long needle, of inside diameter 0.40mm , What is the viscosity of this blood
To what distance x can a person who weighs 411-N walk on the overhanging part of the plank before it just begins to tip.
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 2.2 m when it is uncoiled. What current does the wire carry
A freezer has a coefficient of performance of 2.52 . The freezer is to convert 1.90 kg of water at 26.0 Celsius 1.90 kg of ice at -5.00 Celsius in 1 hour. How much wasted heat is rejected to the room in which the freezer sits
Sam pushes a 10.0-kg sack of bread flour on a frictionless horizontal surface with a constant horizontal force of 4.0 N starting from rest. What is the speed of the sack after Sam has pushed it a distance of 20 cm
When an electron moving through air has 5 MeV of energy, what is the ratio of the rates of energy loss by bremsstrahlung to that by collision? What is this ratio for lead?
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