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An airplane is flying with a velocity of 260 m/s at an angle of 30.0° with thehorizontal, as the drawing shows. When the altitude of the plane is2.0 km, a flare is released from theplane. The flare hits the target on the ground. What is the angleθ?
What should be the least kinetic energy in electron volts
A fireworks rocket is launched vertically upward at 40 m/s. At the peak of its trajectory, When does the second fragment reach the ground
If the initial temperature of the horseshoe is 600?C, and initial temperature of the water is 40?C, what is the equilibrium temperature of the system? Suppose no heat is exchanged with the surroundings.
A hawk flies in a horizontal arc of radius 14 m at a constant speed of 5 m/s. (a) Find out its centripetal acceleration. (b) It continues loftly along the same horizontal arc but increases its speed at the rate of 1 m/s2. Find out the acceleration..
A glass rod is rubbed with a cloth, and the rod is left with a charge of +5.0nC. How many electrons did the cloth gain
The Space Shuttle travels at a speed of about 7.6 × 103 m/s. The blink of an astronaut's eye lasts about 110 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye
A girl pulls a box of mass m = 6 kg across a floor with a constant horizontal force F = 22 N. Initially the block is at rest. For the first d1 = 7 m, What is work done on the box by friction in moving the box over the distance d1 + d2
The school bus picks up Brian in front of his house and takes him on a straight-line 3.4 km bus ride to school in the positive direction. what is the position of the school
Suppose 1.00kg of water at 100 degrees Celsius is mixed with 1.00kg of water at 0 degrees Celsius. What is the total charge in entropy of the mixture
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.21 10-3 g. Find the average pressure on the other walls
Uniform rate of acceleration
A satellite is in a circular orbit around an unknown planet. The satellite has a speed of 1.50 104 m/s, and the radius of the orbit is 5.45 106 m. What is the orbital speed of the second satellite
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