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Two unfortunate climbers, roped together, are sliding freely down an icy mountainside. The upp climber(mass 73 kg) is on a 12 degree slope to the Horizontal, but the lower climber(mass63kg) has gone over edge to a steeper slop of 38 degrees. (a) Assuming frictionless ice and massless rope, what is the acceleration of the pair? (b) The upper climber manages to stop the slide with an ice ax. After the climbers have come to a complete stop, what force must the ax exert against the ice?
A 41.7kg boy and a 56.4kg girl are on the surface of a frozen lake, 14.0m apart. Calculate the magnitude of the boy's acceleration
The alveoli in the lungs have an average radius of 0.125 mm and areapproximately spherical. If body temperature is 37.0 degrees C, and the pressure in the lungs is atmospheric pressure:
A discus thrower (with arm length of 1.2 m) starts from rest and begins to rotate counterclockwise with an angular acceleration of 1.7 rad/s2. What is the magnitude of the discus's total acceleration?
A certain radioactive material has an atomic mass of 172 and a half-life of 505 years (take 1 yr = 365.25 d). What is the activity of 0.9 g of this material?
A 7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 2.0 mW. How many photons are emitted per second by this laser
If two adjacent natural frequencies of an organ pipe are determined to be 475 Hz and 575HZ. Calculate the fundamental frequency and the length of the pipe.
A mass of 0.006 kg is attached to a spring that requires a force of 0.01 N to extend it 0.05 meters greater than its natural length, Find maximum velocity of spring when released from rest
Now, a second resistor R2 of 3.2x10^5 ? is connected in parallel to the existing resistor in the circuit, What will be the new time constant
An alpha particle (m = 6.7 x 10^-27kg, q = +3.2 x 10^-19C) has a speed of 30km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out the electric potential difference.
The highest-energy photons emitted by a hydrogen atom have an energy of 13.6 eV. Find the energy, in joules, of one of these photons
A tank having a volume of 0.11 m3 contains helium gas at 170 atm. How many balloons can the tank completely fill
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