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A balloon filled with helium has a weight of 2.15 N and a volume of 0.495 m3. It is secured to the ground by means of two strings (both strings are located 50 degrees above the horizontal). Find the tension in the strings.
During 6 successive intervals a runner moves at the following constant speeds: .326 km/min for 30 seconds, .123 km/min for 23 seconds, Compute the average speed of the runner
Two hockey players of equal mass are sliding across the ice rink in a straight line directly toward each other. What is the final velocity of player 2
The light emitted by a helium neon laser has a wavelength of 632.8 nanometer in air. calculate its wavelength in zircon
An automobile emits 20 lbs of CO2 per gallon of gasoline burned. how many billions of lbs of CO2 are emitted every year
A well insulated calorimeter contains m1= 150g steam at a temp t1= 110 celcius. water at a temp of t2=10 celcius is poured in the calorimeter. the final equilibrium temp for the water in the calorimeter is tfinal=24 celcius. the specific heat of ..
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. What is the average power generated by the lifting force
The horsepower rating commonly utilized for engines indicates the rate at which they can do work. A one-horsepower engine can do 746 J of work each second. A lawn mower has a 6.50 horsepower engine that runs at 3800 rpm.
A 48.0 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.50. Biometric measurements indicate that each hand typically makes ..
A 20 kg child is on the swing that hangs from a rope 3.5 m long. What is her speed at the bottom of her arc if she swings to out 90 degrees.
A satellite travels at about 8000m/s. What is the factor γ for this speed? As observed from the ground, by how much would a clock traveling at this speed differ from a ground based clock after one hour (as measured by the latter)? What is the percent..
In case of wilson hartnell governor there two main springs and there are one auxiliary spring. And nature of springs are tension always how it can possible? When sleeve will move downward than i will compress but most of the book is explaining spring..
He would like a prescription for contact lenses to serve the similar purpose. What is the correct contact lens prescription, in diopters.
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