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You are standing at = 9.0 km Lightning bolt 1 at x= 0km and lightning bolt 2 at x = 12.0km. Both flashes reach your eye at the same time. Your assistant is standing at x = 3.0km.
If your assistant didn't see the flashes at the same time, what is the time difference between the two flashes? Answer in us.
A lighthouse that rises h1 = 43.6 ft above the surface of the water sits on a rocky cliff that extends $d$ = 20.0 ft from its base, as shown in the figure below. A sailor on the deck of a ship sights the top of lighthouse at an angle of $theta$ = 29...
at rest, a light source emits 532 nm light. as it moves along a line connecting it and Earth, observers on Earth measure the wavelength to be 412 nm. What is the sources velocity and direction? Were it to move in opposite direction at the same spe..
A worker stands still on a roof sloped at an angle of 23° above the horizontal. He is prevented from slipping by a static frictional force of 540 N. Find out the mass of the worker.
A string with a length of 3.0 m has two adjacent resonances at frequencies 112 Hz and 140 Hz. What is the wavelength of the first harmonic
A 1-megabit computer memory chip contains many 60.0 fF capacitors. Each capacitor has a plate area of 21.0x10-12 m2. Express the plate separation in nanometers
A concave mirror (R = 82.4 cm) is used to project a transparent slide onto a wall. The slide is located at a distance of 52.3 cm from the mirror, How far from the wall should the mirror be located
During a game of football, the ball is kicked by the punter with a speed of 20m/s at an angle of 40 degrees above the horizontal. A player on the other team, standing 50m away, starts running to catch the ball immediately after it is kicked. ASsu..
A ladder of unknown length and mass of 29.00 kg rests on a rough floor, and leans against a rough wall. The coefficient of static friction between the ladder and both the floor and wall are 0.68.
q1. a caterpillar climbs up a one-meter wall. for every 3 cm it climbs up it slides down 1 cm. it takes 10 minutes for
A polar bear of mass 436 kg stands on an ice floe 58.10 cm thick. What is the minimum area of floe that will just support the bear in saltwater of density of 1030 kg/m3? The specific gravity of ice is 0.88.
In an amusement park water slide, people slide down an essentially frictionless tube. Does the mass of the person make any difference
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, how fast did the ball strike the ground
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