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Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8305decays per minute to 3105 decays per minute over a period of 3.50days
Q. What is the half-life T1/2 of this isotope?
a car with a mass 1865 kg is travelling west and slows down uniformly to 8.5 m/s over a distance of 108 m. calculate the initial speed of the car if the required braking force is 7525 N
a detector has a sensitivity of 10^6 V/W and a NEP* = 10^-10 W/Hz^1/2. Light of 1E-6 W power is measured with the detector, what is the signal
Two 14.0cm -diameter electrodes 0.50cm apart form a parallel-plate capacitor, What is the potential difference between the electrodes after insulating handles are used to pull the electrodes away from each other until they are 1.9cm apart
A 0.174kg softball is pitched horizontally at 26m/s. the ball moves in the opposite direction at 38m/s after it is hit by the bat.
A force vector has a magnitude of 595 newtons and points at an angle 39o of below the positive x axis. What is (a) x scalar component and (b) y scalar component of the vector.
For light that originates within a liquid and strikes the liquid/air interface, What is Brewster's angle for this light
A dielectric-filled parallel-plate capacitor has plate area of 30cm^2 and plate separation of 5mm. The capacitor is connected to a battery that creates a constant voltage of 10V. The dielectric constant is 3. All through the problem, use epsilon_0..
The rms speed of a sample of gas is increased by 3 percent. What is the percent change in the temperature of the gas? What is the percent change in the pressure of the gas, assuming its volume is held constant?
If a violin string transmits waves at 375 m/s and has 295 Hz as its fundamental frequency, what is the string's length.
The child then proceeds to walk toward the edge of the merry-go-round. Illustrate what is the angular speed of the system when the child reaches the edge?
Consider Iron asteroid (density 7900 kg/m^3) shaped like a cylinder 5.0 km long and 3.0 km in diameter, How much fuel is required to spin up the asteroid
Unpolarized light of intensity I0 passes through six successive Polaroid sheets each of whose axis makes a 45? angle with the previous one
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