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In 1898, Pierre & Marie Curie isolated about 10mg of radium-226 from eight tons of uranium ore. If this sample had been placed in a museum
(a) how much of the radium would remain in the year 2109?
(b) How many radium nuclei would have decayed during this time?
Visitors at a science museum are invited to sit in a chair to the right of a full-length diverging lens (f1 = -2.94 m), Find the overall magnification of the friend when viewed through both lenses
The drawing shows a person looking at a building on top of which an antenna is mounted. How tall is the antenna
A tuning fork has a frequency of 128 Hz, what is the period of the tuning fork
A 1.00-cm-high object is placed 4.70 cm to the left of a converging lens of focal length 7.60 cm. Find the position and height of the final image
A helium-neon laser (l=583 nm) illuminates a single slit and is observed on a screen 2 m behind the slit. What is the width (in mm) of the slit
At the instant the traffic light turns green, a car that has been waiting at an intersection starts forward with a constant acceleration of 2.45 m/s2. How fast is the car traveling when it overtakes the truck
a baseball pitcher throws a 145 g baseball parallel to the ground with a speed of 36.29 ms in the x direction. the
The peak value of the ac current in a circuit is 6.0 A, and peak value of the ac voltage applied to the circuit is 4.7 V. What is the average power derived to the circuit?
A particle is located at the vector position r=(4.00i+6.00j)mand a force exerted on it is given by F=(3.00i+2.00j)N. What is the torque acting on the particle about the origin? Can there be another point about which the torque caused by thisforce on..
A 0.150kg toy is undergoing SHM on the end of a horizontalspring with a force constant 300 N/m. estimate the maximum speed attained by the object duringits motion
Two friends are playing a version of proton golf where the hole ismarked by a single proton. The first friend reads his meter, anddeclares he has a field strength of 25.5 N/C. Thesecond friend looks at her meter and realizes she is three times asfar ..
A man is doing push-ups. He has a mass of 68 kg and his center of gravity is located at a horizontal distance of 0.70 m from his palms and 1.00 m from his feet. Find the forces exerted by the floor on his palms and feet
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