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An airplane of mass 1800 kilogram and flying at 540 km/h loops the loop in a circle of radius 250 meter. When at the lowest point of the loop, the engine is cut off. Obtain the downward thrust of air at highest point of loop, neglecting air resistance.
A car of 1200 kg mass enters an unbanked, curved roadbed of radius 70 m. find the maximum speed with which the car can take the turn
In an experiment of specific heat there are mixed 196 g of aluminum at 107°C with 52.3 g of water at 18.6 °C. Calculate the change in entropy of the system
A car started frm rest and accelerated for 5s at 6.00m/s2.Then it stayed at a constant speed for 20 s. It next slowed down at 3m/s2 until it came to a stop? how far did it travel during the first 5 s.
What is the voltage output of a transformer used for rechargeable flashlight batteries, if its primary has 515 turns, its secondary 8 turns, and the input voltage is 124 V, What is the power input
According to a rule-of-thumb every five seconds between a lightningflash and the following thunder gives the distance to the flash in miles. estimate the speed of sound in m/s from this rule
two trains a and b are approaching each other. the observer is in train a which is going west at 40 miles per hour.
What are the displacement and velocity of the point on the cord. What is the magnitude of the acceleration of one of the liners toward the other because of their mutual gravitational attraction.
suppose after charging a 4 microf capacitor to 9 v you connect it to the second uncharged capacitor of 11 microf. what
A person walks first at a constant speed of 4.80 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 3.30 m/s. What is her average speed over the entire trip?
A piece of cheese with a mass of 1.30kg is placed on a vertical spring of negligible mass and a force constant k= 1600 N/m that is compressed by a distance of 16.2cm. how high does the cheese rise from this initial position
calculate the electric potential due to a dipole whose dipole moment is 4.5times10-30 cm at a point 1.4times10-9 m
a person travels by car from one city to another with different constant speeds between pairs of cities. she drives for
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