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The Earth's rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2006 the Earth took about 0.840 s longer to complete 365 revolutions than it did in the year 1906. What was the average angular acceleration of the Earth during this time? Give your answer in rad/s^s.
On a hot summer day, a young girl swings on a rope above the local swimming hole (Figure 1) . When she lets go of the rope her initial velocity is 2.20 at an angle of 35.0 above the horizontal.If she is in flight for 0.619 , how high above the water ..
Small steel ball bearing with a mass of 17 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.39m. Calculate the horizontal distance ball would travel if the same spring we..
Communication satellites are placed in geosynchronous orbit, i.e., in circular orbit such that they complete one full revolution about the earth in one sidereal day.
A person hums into the top of a well and finds that standing waves are established at frequencies of 10, 30, and 50 Hz. How deep is the well
Consider a car which weighs about 2000 kg and is parked at an elevation of 30 m above the bottom of a hill with a constant slope equal to -.5. what is a horizontal component of the force on the car
A 270-m-wide river flows due east at a uniform speed of 3.5 m/s. A boat with a speed of 7.6 m/s relative to the water leaves the south bank pointed in a direction 25o west of north. What is the (a) magnitude and (b) direction of the boat's velocit..
A thin film of oil (n=1.24) is laying on a flat piece of glass (n=1.83). When viewed through air normal to the oil film, What is the minimum thickness of the oil film
Carbon-14 has an activity of 0.25 Bq per gram of carbon for living organisms. The half-life of Carbon-14 is 5730 years. how old is the material
You know your mass is 62kg , but when you stand on a bathroom scale in an elevator, it says your mass is 90kg. What is the acceleration of the elevator
A near-sighted person's eyeglasses has a focal length of ? 22.0 cm, and the lens is 1.8 cm from the eye. If the person switches to contact lenses that are placed directly on the eye, what should be the focal length of the corresponding contact len..
A cannon is launched at an angle of 45.00 and the cannon ball lands 301 m away. How long was the cannon ball in the air
If you touch the terminal of a battery, What current will pass through your body if you touch the two terminals of a 9.0 V battery with your two hands
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