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An archer fires an arrow by an initial velocity of 21 m/s at an angle of 50 from the horizontal. The arrow lands on a hill that is 5.0 m higher than its initial height. Ignore the effects of air resistance.
1. What speed does the arrow have when it lands?
2. How much time does the arrow spend in the air?
3. How far does the arrow go in the horizontal direction? If you couldn’t answer the first part, assume that the arrow spent 3.7 s in the air?
How many square meters of PV would it take to provide 1KW(about 1/3 of the power needed per person for health and comfort)for a world population of 6 billion? If these cells werecrystalline silicon of 200 microns thick( 200x10-6),what is the minim..
An electric motor can accelerate a Ferris wheel of moment of inertia I = 18500 kg·m2 from rest to 10.1rev/min in 12.0 s. When the motor is turned off, friction causes the wheel to slow down from 10.1 to 8.1 rev/min in 10.0s.
a cannonball is shot from ground level with an initial horizontal velocity of 36.0 ms and an initial vertical velocity
a hospital patient has been given 131i half-life 8.04 days which decays at 6.3 times the acceptable level for exposure
Louie Lemon rides on a Ferris wheel that takes 8.0 s to go once around; the radius of the wheel is 10.0 m. What is Louie's acceleration (magnitude and direction) when he reaches the lowest point of the ride
q1. a projectile is fired horizontally from a gun that is 48.0 m above flat ground emerging from the gun with a speed
An astronaut is traveling to the Moon at a speed of 0.57c. When his spacecraft is1.9*10 8 m from the Moon, there is an explosion on the Moon. How long does it take for light from the explosion to reach the astronaut as gauged on the astronaut's clo..
A dynamite blast at a quarry launches a rock straight upward, and2.5 s later it is rising at a rate of 18 m/s. Assuming airresistance has no effect on the rock, calculate its speed(a) at launch and (b)5.3 s afterlaunch
Light from a sodium lamp (lamda=589 nm) illuminates two narrow slits. The fringe spacing on a screen 150 cm behind the slits is 4.0 mm. What is the spacing (in mm) between the two slits
A fluid in an insulated, flexible bottle is heated by a high resistance wire and expands. If 9kJ of heat is applied to the system and it does 5kJ of work, how much does the internal energy change?
A 2.0 µF capacitor in a circuit in series with a resistance of 1.0 M is charged with a 6.0 Volt battery. Find how long would it take to charge the capacitor to three-fourths of its maximum voltage
This caused Goodly to borrow to meet its obligations, resulting in a drop in its stock price. Are the directors liable? Explain why or explain why not?
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