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Iodine 53131I is used in diagnostic and therapeutic techniques in the treatment of thyroid disorders. This isotope has a half-life of 8.04 days. What percentage of an initial sample of 131I remains after 20.0 days?
A golf ball is driven from a level fairway. At a time of 5.32 s later, the ball is traveling downward with a velocity of 55.2 m/s at an angle of 26.0° below the horizontal. Neglecting air resistance, calculate the initial velocity (magnitude and dire..
the membrane that surrounds a certain type of living cell has a surface area of 4.8 x 10-9 m2 and a thickness of 1.6 x
A soccer ball with mass .42 kg is initially moving with speed 2.00 m/s. Over what distance must the player's foot be in contact with the ball to increase the ball's speed to 6.00 m/s
A cylindrical piece of metal 8.50 cm tall with a radius of 1.95 cm has a specific gravity = 4.0, what is the mass of the cylinder in units of grams
The thermal expansion coefficient of copper is about 1.7x10-5 / oC. A copper cable has a length of 20 m early in the morning, when the temperature is 15 oC. What is the change in it's length (Lnew-Lold) at noon, when the temperature is 25 oC?
A particle moves in simple harmonic motion with a frequency of 2.20 Hz and an amplitude of 5.60 cm. Through what total distance does the particle move during one cycle of its motion?
A person of mass 75kg hauls himself off the floor up a vertical rope with an acceleration of 0.68m/s. calculate the tension in the rope
A bicyclist rides 3.01 km due east, while the resistive force from the air has a magnitude of 7.71 N and points due west. Find the work done by the resistive force during the round trip
Two charged particles, q1 = ?2.50×10?3 C and q2 = +3.550e-3 C, are separated by a distance of 5.00 cm. find the electric potential energy of this configuration
A proton is released from rest in a uniform electric field of magnitude 421 N/C. (a) Find the electric force on the proton. magnitude N direction (b) Find the acceleration of the proton. magnitude m/s2 direction (c) Find the distance it travels in..
One solenoid is centered inside another. The outer one has a length of 55.0 centimeter and contains 6600 coils, Determine the emf induced in the inner solenoid
Water, which we can treat as ideal and incompressible, flows at 12 m/s in a horizontal pipe with a pressure of 3.0 x 104 Pa. If the pipe widens to twice its original radius, what is the pressure in the wider section
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