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A 2.0 mg sample of carbon-14 is measured to have an activity of 6.5 x 10^10 Bq. Use this information to determine the half-life of carbon-14 in years.
A plane, diving with constant speed at an angle of 40.7° with the vertical, releases a projectile at an altitude of 622 m. How far does the projectile travel horizontally during its flight
A 0.2-kg ball is bounced against a wall. It hits the wall with a speed of 20 m/s at a 10 degree angle and rebounds elastically at a 10 degree angle
Initially, an object is 12cm to the left of a convex lens of focal length 8.2cm, then a concave (diverging) lens of local length -9cm is placed 20cm to the right of the convex lens, find the Image distance from concave lens
A boy pulls a 20-kg box with a force of 50-N @ 37 degrees above the horizontal surface. The coefficient of kinetic friction among the box and the horizontal surface is 0.15, and the box is pulled over a distance of 25m.
An electron of mass 9.11 10-31 kg has an initial speed of 2.80 105 m/s. Determine the magnitude of the force exerted on the electron
A cosmic ray travels 60 {\rm km} through the earth's atmosphere in 420 \mu s, as measured by experimenters on the ground
(a) How much charge can be placed on a capacitor with air between the plates before it breaks down if the area of each plate is 6.00 cm2? (b) Find the maximum charge if bakelite is used between the plates instead of air.
Suppose that the amplitude and frequency of the transverse wave, Find the total vertical distance (in cm) through which the colored dot moves in 3.8 s
Suppose 1500 J of heat are added to 5.6 mol of argon gas at a constant pressure of 120 kPa. Calculate the change in volume of the gas
Consider an infinite arrangement of capacitors shown in the figure. C1= nF and C2 = nF. What is the equivalent capacitance Ceq
an object is pulled west along a horizontal frictionless surface with a steady horizontal force of 12.0 n. if the
Two conducting rails 30cm apart rest on a 5.0(degree)ramp. They are joined at the bottom by a 0.60 ohm resistor, What is the termal velocity of the bar
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