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1. A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 0.73 kg sample of carbon from the wood has an activity of 2330 decays per minute. Find the age of the charcoal. Living material has an activity of 15 decays/minute per gram of carbon present and the half-life of 14C is 5730 y. Answer in units of y 2. The asymptotic wavelength (λlimit) for the Brackett series is 1500 nm. What is the wavelength of the first emission line? Answer in units of nm 3. asymptotic wavelength (λlimit) for the Lyman series is 91.1 nm. What is the wavelength of the third emission line?
2.50 moles of a monatomic ideal gas expand adiabatically from an initial temperature of 300K and an initial volume of 80.0 L to a final volume of 150.0 L
A 211-? and a 221-? resistor are connected in series across an unspecified power supply, what is the exact current (in A) through the 221-? resistor
Two parallel plates of area 190 cm2 are given charges of equal magnitudes 6.0 x 10-7 C but opposite signs. Calculate the dielectric constant of the material
The length of the ice block is L1 = 0.00484 m and its temperature is T1 = -11.0 °C. The aluminum block is L2 = 0.00139 m long, Calculate the heat per second per square meter
An automobile battery has an emf of 12.60 V and an internal resistance of 0.084 0 ?. The headlights together have an equivalent resistance of 5.800 ? (assumed constant).
A flashlight on the bottom of a 3.70 m deep swimming pool sends a ray upward at an angle, What angle (in air) does the emerging ray make with the water's surface
A car decelerates uniformly and comes to a stop after 10s. The car's velocity was 50 km/h. What was the car's deceleration
A doubly charged ion is accelerated to an energy of 35.0 keV by the electric field between two parallel conducting plates separated by 2.20 cm
An anchor, made of cast iron of bulk modulus 60.0 × 109 Pa and of volume 0.230 m3, Find the change in the volume of the anchor
A 626-kg satellite is in a circular orbit about Earth at a height above Earth equal to Earth's mean radius. Find the gravitational force acting on it
Standing at a crosswalk, you hear a frequency of 500 Hz from a siren of an approaching ambulance. Determine the ambulance's speed from these observations
A 700 N window washer is standing on a uniform scaffold supported by a vertical rope at each end. The scaffold weighs 200 N and is 3 m long. what is the force in each rope when washer stands 1 m from one end.
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