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Mach number M is a dimensionless quantity equal to the ratio of the speed of the aircraft to the speed of sound in the air, approximately 342 m/s. At M = 1 the aircraft is said to "break the sound barrier".
(a) Calculate M for an airliner cruising at 800 km/hr.
(b) How fast does an aircraft need to travel to reach M = 2? Express the speed in km/hr.
An arrow is fired with a speed of 20.0 m/s at a block ofStyrofoam resting on a smooth surface. how far into the block does the arrow penetrate
question an electric field exerts a force of 3.00 x 10-4 n on a positive test charge of 7.50 x 10-4 c. find the
Jupiter has the strongest magnetic field in our solar system, about 14 at its poles. Approximating the field as that of a dipole, find Jupiter's magnetic dipole moment
Consider a circular loop of wire placed with its face parallel to the uniform magnetic field between the pole pieces of a large magnet. The loop carries 774 A of current and has a diameter of 9.3 cm. If the torque on the loop is 8.2 m*N, how stron..
Over a time interval of 1.92 years, the velocity of a planet orbiting a distant star reverses direction, changing from +22.2 km/s to -20.5 km/s. Find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) du..
if the torque required to loosen a nut that is holding a flat tire in place on a car has a magnitude of 43.0 nmiddotm
A pendulum is made by tying a 590 g ball to a 47.0 cm-long string. The pendulum is pulled 22.0^\circ to one side, then released.
A satellite is in a circular orbit about the earth (M=5.98 x 10^24 kg). The period of the satellite is 1.40 x 10^4 s. What is the speed at which the satellite travels
A soccer ball is at rest on the ground 32 m away from a fence. A boy kicks the ball towards the fence w/ a velocity of 20 m/s at 37 degrees above ground level. The fence is 2.5 m high. Decide how much time it takes for the ball to reach the plane of ..
Consider a proton to be a uniformly charged sphere 1 fm in radius. Find the electric energy density at the proton's surface
To recharge an 18.0 V battery, a battery charger should move 4.39×105 C of charge from the negative terminal to the positive terminal. How much work is done with the battery charger?
the west antarctic ice sheets some 0.83 million km2 and only 6 of the total antarctic ice surface have an average
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