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A plane flies parallel to the ground at a speed of 1.15 times the speed of sound. Its sonic boom reaches a man on the ground 1.30 minutes after the plane passes directly overhead. What is the altitude of the plane? (Assume the speed of sound to be 330 m/s.)
wheel A of radius rA = 11 cm is coupled by belt B to wheel C of radius rC = 20 cm. The angular speed of wheel A is increased from rest at a constant rate of 1.6 rad/s2. Find out the time needed for wheel C to reach an angular speed of 100 rev/min,..
The sun produces energy by nuclear fusion reactions, in which matter is converted into energy. How many kilograms of matter does the sun lose each second
An arrow is launched vertically upward from a crossbow at 97.9 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneou..
The ball rebounds straight upward to a height of 3.20 m. Taking the negative direction to be downward, illustrate what is the impulse of the net force applied to the ball during the collision with the floor?
A small sphere with mass 1.20 hangs by a thread between two large parallel vertical plates 5apart. The plates are insulating and have uniform surface charge densities and. The charge on the sphere is = 8.80×10-6.
The 1400-turn coil in a dc motor has an area per turn of 1.1 multiply.gif 10-2 m2. What is the current in the coil
Suppose a capacitor in a video camera has a capacitance of 26.0 ?F, how much potential energy is stored in the capacitor
What is an expression for , the position of mass I as a function of time? imagine that position is measured in meters and time is measured in seconds.
A comet has a very elliptical orbit with a period of 123.0 years. what is its greatest distance from the Sun in AU
In an attempt to reduce the extraordinarily long travel times for voyaging to distant stars, some people have suggested traveling at close to the speed of light. How fast must the rocket travel relative to earth
A person sitting quietly in a room on a winter day may lose heat primarily by radiation from the outer surface of her clothes to the walls of the room. what is the temperature of the outer surface of the clothes
An athlete training for an event does 6.53 104 J of work during a workout and gives off 6.17 105 J of heat, Determine the magnitude of the change in internal energy of the athlete
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