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two pieces of the same metal however of different mass and at different initial temperature come in thermal contact
a projectile is launched straight up at 515 ms from a height of 885 m at the edge of a sheer cliff the projectile falls
from the top of a 70 m building you throw a ball straight up at 6 ms the ball misses the building on the way down1 what
an electrical coil is made by winding copper wire around a core what is the resistance of 50000 turns of a measure wire
starting from rest a dragster travels a straight 14 mi racetrack in 670 s by constant acceleration what is its velocity
1 assume all the electrons could be removed from eartha discover the force on a proton just above the earths surface
clearly there will be differences like air resistance im not interested in that it seems like youre working against
a 01m long solenoid has a radius of 005m and 15x104 turns the current in the solenoid changes at a rate of 60as a
a meteorologist tracks the movement of a thunderstorm by doppler radar at 800 pm the storm was 60mi northeast of her
two small metallic spheres each of mass m 015 g are suspended as pendulums by light strings from a common point as
a plastic sphere floats in water by 500 of its volume submerged this same sphere floats in glycerine with 400 of its
a downward force of 30n is exerted on a -88c charge1 what is the direction of the electric field at this point2 what is
using the free - electron theory of metals compute a the ground state energy level in a block 1 cm times 1 cm times 1
the large piston has a cross-sectional area of 200 cm2 and the small piston of a hydraulic lift has a cross-sectional
a molecule of dna deoxyribonucleic acid is 223 microm long the ends of the molecule become singly ionized negative on
a wave travels along a string at a speed of 295mswhat will be the speed if the string is replaced with one made of the
the average radius of earth is 6371 km give order-of magnitude estimates of what the mass of earth would be if the
a solid metal sphere in electrostatic equilibrium has a positive net charge how is the net charge distributed in the
while admiring a tree you notice that the leaves form a more or less continuous spherical shell with relatively few
compute the de broglie wavelengtha an electron with a kinetic energy of 100 evb a proton with a kinetic energy of 100
a calculate the derivative of the speed of sound in air by respect to the absolute temperature and show that the
1 a 2 c charge and a 8 c charge repel each other with 10 n of force how much will a 4 c charge and a 4 c charge repel
1 when a glass rod is rubbed with silk it the rod becomes positively charged this happens because1 electrons are
two point charges are located on the x-axis one has a charge of 129c and is located at x 00 m and the other has a
a transverse wave of frequency 10 hz propagates down a string two points 7 cm apart are out of phase by6 a what is the