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A sample of 2.3×1010 atoms that decay by alpha emission has a half-life of 150 min. How many alpha particles are emitted between t=30 min and t=160 min. will rate life-saver for a correct and detailed answer.
A 5.78 cm long rod in the shape of a rectangular solid has cross section dimensions 28.7 mm x 42.6 mm. What is the current in the block
What is the phase constant of the motion and what are its position and direction of travel at t = 2.00 s, what is the first time when the object is at maximum velocity?
A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). what is the density of the gas in this geiger tube
The frequency doubled output of a Nd3+ YAG laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532nm in 3 minutes.
A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. It takes 3.50s for the boat to travel from its highest point to its lowest, a total distance of 0.640m .
Two metal rods of equal length-one aluminum, the other stainless steel-are connected in parallel with a temperature of 24.0?C at one end, by what factor does the rate of heat flow change
The days on Mars and Earth are of nearly identical length. Earth's mass is 9.35 times Mars's mass, Earth's radius is 1.88 times Mars's radius, Estimate the ratio (Earth to Mars) of the their orbital kinetic energies
A person pushes a 21.9-kg shopping cart at a constant velocity for a distance of 23.8 m on a flat horizontal surface. What is the magnitude of the force that the shopper exerts
The bacterium Escherichia Coli (E. coli) is a single celled organism that lives in the gut of healthy humans and animals, For the segment BC in the bacteriums trajectory, calculate the x and y components of its displacement
If an astronaut can throw a certain wrench 14 {rm m} vertically upward on earth, how high could he throw it on our moon if he gives it the similar starting speed in both places.
A 27 cm tall object is placed in front of a concave mirror with a radius of 38 cm. Calculate the magnification of the image and magnitude of the image height
What is the electric flux through sphere that has a radius of 1.00 m and carries a charge of +1.00 ?C at its center
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