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1. Two short-lived isotopes of element are produced in a nuclear reaction. One of these isotopes has a mass of 5.3731 amu and accounts for 85.5% of the production. The remaining other isotope has a mass of 7.3904 amu. Use this information to calculate the atomic mass of this element.
2. A specific radioactive isotope has a half-life of 24.2 minutes. How long will it take this isotope to decay to 1/8 of its original amount?
3. The formula of the ionic compound that forms two ions,A^2+ and R^9-, Can be written as AxRy. What is the value for X?
Two fixed navigation beacons mark the approach lane to a star. Determine the time interval of the passage
two 1.9kg masses are 1.5m apart center to center on a frictionless table. each has 9.3?c of charge.what is the
What is the percent change in momentum of a proton that accelerates from 0.49c to 0.90c? What is the percent change in momentum of a proton that accelerates from 0.90c to 0.98c?
question an 18-cm-long bicycle crank arm with a pedal at one end is attached to a 20-cm-diameter sprocket the toothed
When some stars use up their fuel, they undergo a catastrophic explosion called a supernova. This explosion blows much or all of a star's mass outward, in the form of a rapidly expanding spherical shell.
Two slits are illuminated with red light ( ? = 650 nm). The slits are 0.25 mm apart and the distance to the screen is 1.25 m. What fraction of the maximum intensity on the screen is the intensity measured at a distance 3.0 mm from the central maxi..
Water from a garden hose is sprayed against your car to rinse dirt from it. Estimate the force that the water exerts on the car. List all assumptions and show calculations.
A diverging lens (f = -11.5 centimeter) is placed 20.0 centimeter to the left of a converging lens (f =33.5 centimeter). Estimate the distance of the final image relative to converging lens
A 3 μF capacitor is connected in series with a 22 kΩ resistor. Find the voltage between the plates of the capacitor 18 ms after closing the switch
A disk with radius R has uniform surface charge density. (a) By regarding the disk as a series of thin concentric rings, calculate the electric potential V at a point on the disk's axis a distance x from the center of the disk.
A 69.20-kg free runner jumps off a wall at a velocity of 6.95 m/s at an altitude of 2.37 m above the ground. What is the free runner's kinetic energy when he jumps off the wall
question a tungsten filament used in a flashlight bulb operates at 0.20 a and 3.2 v. if its resistance at 20oc is 1.5?
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