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A spaceship is measured to be 120 m long while it is at rest with respect to an observer. If the spaceship now flies past the observer with a speed of .99c, what length will the observer measure of
It makes a glancing collision with a second puck of radius r2 = 6.00 cm and mass m2 = 115 g (initially at rest) such that their rims just touch. Because their rims are coated with instant-acting gl
A rifle with a barrel length of 65 fires a 12 bullet with a horizontal speed of 370 . The bullet strikes a block of wood and penetrates to a depth of 10 . What resistive force (assumed to be constan
What is the method of investigating the rate of change of velocity along the downward frictionless slope or plane
Michael and Misty are standing motionless together on the ice at the center of a very slippery pond. Who exerts a greater force on the other?
What mass (in grams) of steam at 100°C must be mixed with 483 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 69.0°C? The specific heat of wate
005 10.0 points A polar bear starts at the North Pole. It travels 1 km South, then 1 km East, then 1 km North to return to its starting point. This trip takes 45minutes . What was the bears average
A gold prospector finds a solid rock that is composed solely of quartz and gold. The rock has a mass of 12.0-kg and a volume of 4.00 X 10^-3 m^3. What mass of gold is contained in the rock?
A parallel beam of light from a He-Ne laser, with a wavelength of 644 nm, falls on two very narrow slits 0.050 mm apart. How far apart are the fringes in the center of the pattern on a screen 2.2 m
A toy car runs off the edge of a table that is 1.225 m high. if the car lands .400m from the base of the table
A 300 g block on a 56 cm-long string swings in a circle on a horizontal, frictionless table at 95 rpm. What is the speed of the block? What is the tension in the string?
A rectangular loop with sides of length a= 1.80 cm and b= 4.50 cm is placed near a wire that carries a current. What is the induced e.m.f. in the loop at time t= 2.10 seconds?
A 15 g rifle bullet traveling 240 m/s buries itself in a 3.7 kg pendulum hanging on a 2.5 m long string, which makes the pendulum swing upward in an arc. Determine the vertical and horizontal compon
A thin uniform cylindrical turntable of ra- dius 2.9 m and mass 17 kg rotates in a hori- zontal plane with an initial angular speed of 7.5 rad/s. The turntable bearing is friction- less. A clump of
When one person shouts at a football game, the sound intensity level at the center of the ?eld is 60 dB. When all the people shout together, the intensity level increases to 109 dB. Assu
What is the magnitude of its displacement? (b) If the fly walks rather than flies, what is the length of the shortest path it can take?
The rope hanging vertically down off a work bench. How much work must be done to place all the rope on the bench?
When the plane is a distance 116 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog will the suitcase land? You can ignore a
A device used in radiation therapy for cancer contains 0.50 g of cobalt _27^60 text(Co) (59.933 819 u). The half-life of _27^60 text(Co) is 5.27 yr. Determine the activity of the radioactive materi
A 78-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 834 N. What is the acceleration of the elevator?
The effective cross-sectional area of the pipe is 5.00 X 10^-4 m^2. How many gallons per minute are being used by the fountain?
A kayaker needs to paddle north across a 100-m-wide harbor. The tide is going out, creating a tidal current that flows to the east at 2.0 m/s. The kayaker can paddle with a speed of 3.0 m/s. In whi
The speed of the water passing around the plug is to be three times greater than the speed of the water before it encounters the plug. Find the ratio of the plug radius to the inside hose radius.
The force stretching the D string on a certain guitar is 150 newtons. The string's linear mass is .005 kilograms. What is the speed of the waves on the string?
Find (a)The angular acceleration (b)The angular speed after 4 sec from rest (c)The number revolution made in the 4 sec (d)show that the work done on the wheel in the 4 sec is equal.