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Carbon-14 has an activity of 0.25 Bq per gram of carbon for living organisms. The half-life of Carbon-14 is 5730 years. If a sample of charcoal from an archeological dig yields a Carbon-14 activity of 0.15 Bq per gram of carbon, how old is the material?
A 500 g ball swings in a vertical circle at the end of a 1.4-m-long string. When the ball is at the bottom of the circle, What is the speed of the ball at that point
What is Fx of the magnitude of the skiers velocity.
A 0.70 kg ball is moving horizontally with a speed of 9.7 m/s when it strikes a vertical wall. What is the magnitude of the change in linear momentum of the ball
The electric field points radially outward at all points within the sphere (and outside too, for that matter). What is the strength of the electric field at a distance r from the center, inside sphere.
Consider resistor= 20 ohms, capacitor= 6 microfarads, and a 50 mH inductor, At what frequency is the current a maximum and what is the maximum rms current
A 240g ball and a 130g ball are connected by a 32 cm-long massless, rigid rod. The structure rotates about its center of mass at 150rpm.
The discovery of a star orbiting the center of our galaxy with a 15-year period has led to the finding, calculate the semimajor axis of the star's orbit
An air-filled pipe is found to have successive harmonics at 1050Hz , 1350Hz , and 1650Hz, It is an open-closed pipe, so What is the length of the pipe
If the car was in neutral and its brakes were off, so that the collision is approximately elastic, find out the final speed of the truck.
A research balloon bound for the stratosphere is filled at sea level with 800 m3 of helium whose initial temperature is 285 K. What is the temperature of the helium
A student makes a simple generator by using a single square loop 24 cm on each side. The loop is then rotated at a frequency of 60 Hz in a magnetic field of 0.044 T.
In an experiment using an inclined track with a dynamics cart, the computer failed, find the cart's acceleration, mass, and the tension in the string connecting the cart to the accelerating 50g mass
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