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A sample has a activity of 0.0021 Bq per gram of carbon.
(a) Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq.
(b) Evidence suggests that the value of 0.23 Bq might have been as much as 24% larger. Repeat part (a), taking into account this 24% increase.
The speed of object at displacement x = 20 m. The change in the momentum of the object at it is displaced from x = 12 to x = 20 m.
Estimate approximately the angular deflection of the muon's trajectory, given that the rest mass of muon is 100Mev and that the saturation magnetization in iron is equivalent to 1.6 x 10^23 electron moments per cm^3.
A spring of stiffness 25 kN m-1 is compressed by an initial load of 5 kN, gradually applied, What is the total work done on the spring
An ideal spring has the spring constant k = 428 N/m. find the distance this spring must be stretched from its equilibrium position for 28 J of work to be done.
a 10,000kg open rail car rolls under a hopper at 1m/s. the hopper dispenses grain into the moving rail car, how much grain was loaded into the car
When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy, Determine the amount of water you lose to evaporation when running for 31 minutes at a rate that uses 400 kcal/h above your BMR
a block 20cm wide by 60 cm long balances (symetrically on a similar block which is fixed to the ground. What is the mass of the upper block
What is the resultant velocity of the motor boat. What distance downstream does the boat reach opposite shore.
A 71-kg skier is going down a slope oriented 32° above the horizontal. Determine the pressure that each skier exerts on the snow
When Philippe Petit was in the middle of the wire between the World Trade Center Towers the wire depressed 1 ft. If during his 40 minutes of tricks the wire began to oscillate up and down from this equilibrium position by 6 inches, where is his ki..
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, How fast are the waves traveling
Two small identical conducting spheres are placed with their centers 0.78 m a part, The spheres are connected by a conducting wire, What is the electrostatic force between the two after equilibrium is reached
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