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Two trains are traveling toward each other in still air at 27.6 m/s relative to the ground. One train is blowing a whistle at 330 Hz. The speed of sound is 343 m/s.(a) What frequency is heard by a man on the ground facing the whistle-blowing train?(b) What frequency is heard by a man on the other train?
The displacement vectors 46.0 cm at 15.0° and 23.0 cm at 53.0° both start from the origin and form two sides of a parallelogram. Find the area of the parallelogram
Physics: Speed of car at bottom of driveway; initial speed of bullet, 20 A 2.10 x 10³ kg car starts from rest at the top of a 5.0 m long driveway that is sloped at 20° with the horizontal. If an average friction force of 4.0 x 10³ N impedes the mo..
A hunk of aluminum is completely covered with a gold shell to form an ingot of weight 44.0N. What is the weight of the gold in the shell
A jackhammer causes a sound intensity of 95 bB at a point where a person is standing. What is the sound intensity level at the position of the listener
A thin spherical shell has a radius of 1.70 m. An applied torque of 920 N m imparts to the shell an angular acceleration equal to 6.70 rad/s2 about an axis through the center of the shell. What is the rotational inertia of the shell
A 1/2 kg ball is dropped from rest at a point 5m above the floor and bounces back with a speed of 6m/s. And is there a way to determine the impulse the ball applies to the floor
An object at distance (s) from a concave mirror of focal length (f) produces a real image at distance(s*) from the mirror. Will the new image be real or virtual
A civil war era cannon is capable of firing a cannonball at 150 m/s. If it is set to fire at 39 degrees above the horizontal: how far will it go horizontally
A rectangular air mattress is 2.10m long, 0.48m wide and 0.09 m thick. If it has a mass of 2.30 kg, what additional mass can it support in water.
An object of mass 50.5 g is initially placed in boiling water so that it is at 101° C. Then the object is dropped into a calorimeter, Find the specific heat of the object
A coil with resistance 0.05( and self-inductance 0.01H is connected across a 12-volt battery of negligible internal resistance. a) How long after the switch is closed will the current reach 95% of its final value.
A boy shoves his stuffed toy zebra down a frictionless chute, starting at a height of 1.49 m above the bottom of the chute and with an initial speed of 1.55 m/s. How far from the bottom of the chute does the toy zebra come to rest
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