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Question: As a high-power laser engineer you need to focus a1.17-mm diameter laser beam to a10.3-µm diameter spot20.6cm behind the lens. What focal length lens would you use?
A motorist pulls into a gas station and uses a pressure gauge to check one of the tires on her car. What is the absolute pressure of the air in the tire
A broken piano emits frequencies from a low of 32.0 Hz to a high of about 4100 Hz. What is the shortest wavelength if the speed of sound in air is 342.50 m/s? Record the answer to three decimal places and include units in the answer.
The wheels of a wagon can be approximated as the combination of a thin outer hoop, of radius rh = 0.474 m and mass 5.46 kg, and two thin crossed rods of mass 7.80 kg each. You would like to replace the wheels with uniform disks that are 5.25 cm th..
Suppose a proton accelerator is 3.99 m long and must accelerate protons from rest to a speed of 1.15 x 107 m/s. Ignore any relativistic effects and determine the magnitude of the average electric field
A canister containing 115 kg of an ideal gas has a volume of 6.5 m3. what is the rms speed of the molecules
A system does 4.30 104 J of work, and 7.00 104 J of heat flows into the system during the process. Find the change in the internal energy of the system
A wire 25.1 m long and 6.00 mm in diameter has a resistance of 15.0 m. A potential difference of 28.0 V is applied between the ends. Calculate the resistivity of the wire material
A 11.2 kg object oscillates at the end of a vertical spring that has a spring constant of 1.90 104 N/m. Calculate the frequency of the dampened oscillation
what is the minimum acceleration necessary for the plane to take flight.
An asteroid is discovered heading straight toward Earth at 14 km/s.An international team manages to attach a giant rocket engine tothe asteroid. The rocket fires for 10 min, after which the asteroidis moving at 28 degrees to its original path at a sp..
The temperature of a gold bar rises by 10.0°C when it absorbs 0.677 kJ of energy by heat. The mass of the bar is 525 g. Determine the specific heat of gold from these data
A saw blade goes from rest to 3500 rpm in 3.0s. Through how many radians does the blade turn while reaching 3500 rpm
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