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A piece of charcoal used for cooking is found at the remains of anancient campsite. A 1.10 kgsample of carbon from the wood has an activity of 2.20 x 103 decays per minute. Find the age of the charcoal. [Hint: Living material has anactivity of 15.0 decays/minute per gram of carbon present.]
What must the charge (sign and magnitude) of a 1.43 g particle be for it to remain stationary when placed in a downward-directed electric field of magnitude 630.
An electron ejected from an orbital of a diatomic molecule by 21.22 eV radiation was found to have a speed of 1.90 Mm s-1. To what ionization energy does that correspond?
A laser with wavelength d/8 is shining light on a double slit with slit separation 0.3 {rm mm}. This results in an interference pattern on the screen a distance L away from the slits. We wish to shine a second laser, with a different wavelength, t..
an object has initial velocity in the upward direction a final velocity in the downward direction and undergoes
In the figure below, two parallel-plate capacitors A and B are connected in parallel across a 600 V battery. Each plate has area 70.0 cm2; the plate separations are 3.30mm, Find the magnitude of the electric field within the dielectric of capacitor..
There are no results for For a transformer with Vp=120Vrms, and turn ratio of 8 to 1 with a RL of 500. What is the secondary ratio
a cannon fires a cannonball at an infinitely tall castle a horizontal distance d away from the cannon. the cannon makes
After landing on an unfamiliar planet, a space explorer constructs a simple pendulum of length 52.0 cm . The explorer finds that the pendulum completes 108 full swing cycles in a time of 145s .What is the magnitude of the gravitational acceleration o..
An automatic rifle fires 50 gram bullets at aspeed of 900 m/s at a rate of 50 bullets per second. What is the average recoil force against the gun's mount
A 2.00 g plastic bead charged to -4.00 nC and a 4.00 g glass bead charged to +8.00 nC are 2.00 cm apart, find the initial accelerations of the plastic bead
An observer in reference frame S notes thattwo events are separated in space by 220m and in time by 0.85 micro seconds. How fast must reference frame S' be movingrelative to S in order for an observer in S' to detect the two events as occuring at ..
In an experiment performed in a space station, a force of 38 N causes an object to have an acceleration equal to 5 m/s2. What is the object's mass
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