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1) The nucleus of a certain atom has a radius of 4.0 × 10-15 m. An electron orbits the nucleus at a radius of 1.5 × 10-10 m. Imagine the electron orbit is on the surface of a sphere and that the shape of the nucleus is spherical. Approximately how many nuclei would fit into the sphere on which the electron orbits? A) 5.3 × 1013 B) 4.9 × 1011 C) 1.4 × 109 D) 7.5 × 107 E) 3.8 × 104
2) AN object has a charge of -2 microC. How many electrons must be removed so that the charge becomes +3 microC?
3) Calculate the charrge of 1.25 moles of sodium ions (a sodium ion consists of 11 protons and 10 electrons.
an airplane with a speed of 45 ms is climbing upward at an angle of 46deg with respect to the horizontal. when the
A hockey puck leaves a player's stick with a speed of 8.00m/s and slides 37.0m before coming to rest. Find the coefficient of friction between the puck and the ice
A 1.5 kilogram bicycle wheel with a radius of 0.27 meter turns at a constant angular speed of 28 rad/s, Compute the angular speed of the wheel when the reflector slides to a distance of 0.27 meter from the axle
What is the maximum distance along the ladder a person of mass 15M can climb before the ladder starts to slip?
a current of 0.307 a through your chest can send your heart into fibrillation ruining the normal rhythm of heartbeat
The surface area of an adult human is about 1.8 m^2. Suppose a person with a skin temperature of 34C is standing nude in a room where the air is 25C but the walls are 17C. What is the person's net radiation loss to the walls
Assume that the net horizontal force is due to rolling friction only and take free-fall acceleration to be = 9.80 .What is the coefficient of rolling friction for the tire under low pressure.
Find the impurity concentrations necessary to dope the polysilicon gate so that the surface is flat-banded. VS=0, intrinsic, VS=VF, and at the threshold, VS=2VF.
A uranium atom is ionized seven times, losing seven electrons inthe process. Its resulting mass is 3.90×10−25 kgand it is given a kinetic energy of 3000 eV. If it circles ina magnetic field at a radius of 4.00 m, what isthe strength of the magnetic f..
An electron is traveling through a region of space in which the electric field is along the +x direction, What is the acceleration of the electron
A catapult on a cliff launches a large round rock towards a ship on the ocean
GPS satellites orbit the Earth at an altitude of 12,500 miles. How long does it take these satellites to make a complete orbit of the Earth?
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