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A person is standing on and facing the front of a stationary skateboard while holding a construction brick. The mass of the person is 70.0 kg, the mass of the skateboard is 4.10 kg, and the mass of the brick is 2.50 kg. If the person throws the brick forward (in the direction they are facing) with a speed of 13.0 m/s relative to the ground and we ignore friction, determine the recoil speed of the person and the skateboard.
Assume a dampening depth, d, of 30 cm and a period, lambda, of 24 hours (8.64 x 104 sec). Assume a volumetric heat capacity, C, of 0.5 cal/cm °C, find the thermal diffusivity and conductivity
What current flows through a 2.54 cm diameter rod of pure silicon that is 19.0 cm long, when 1000 V is applied to it
A crane weights 10500kg and the wrecking ball is 800kg. the arm of a crane can extend to a lenght of 22m. Whats the max speed of the wrecking ball
A tuning fork vibrating at 516 Hz falls from rest and accelerates at 9.80 m/s2. How far below the point of release is the tuning fork while waves with a frequency of 489 Hz reach the release point? Take the speed of sound in air to be 340 m/s.
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 58.8°, Obtain the speed of light in the material
Jim's dog Sparky runs 45.0m northeast to a tree, then 65.0m west to a second tree, and finally 25.0m south to a third tree. Calculate the direction of Sparky's net displacement
The resolution of the eye is ultimately limited by pupil diameter. What is the smallest diameter spot an eye can produce on the retina if pupil diameter is 4.45? Assume light with a wavelength of = 600 .
Find the direction of the net force exerted on the Sun. Give the direction relative to the line connecting the Sun and the Moon
Two identical conducting spheres, fixed in place, attract each other with a force of 0.094 N when their center to center separation is 60.00 cm. What was the initial negative charge on one of the spheres
Two capacitors are connected in series. Let 3.00?F be the capacitance of first capacitor, 5.50?F the capacitance of the second capacitor, Calculate the potential difference across each capacitor
A jeweler working with a heated 47 g gold ring should lower the ring's temperature to make it safe to handle. If the ring is initially at 99 degrees Celcius, what mass of water at 25 degrees Celcuis is needed to lower the ring's temperature to 38 ..
An electron with kinetic energy 1.36 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 24.0 cm. Find the frequency of circling
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