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Doug pushes a 4.60 kg crate up a 1.70-m-high 20 ^\circ frictionless slope by pushing it with a constant horizontal force of 28.0 N.What is the speed of the crate as it reaches the top of the slope? Solve this problem using work and energy. Solve the problem using Newton's laws.
How many overtones are present within the audible range for a2.25 m long organ pipe at 16°C if it is open
Estimate the rms electric field in the sunlight that hits Saturn, knowing that the Earth receives about 1350 W/m2
which the tortoise wins in a photo finish? suppose that, when moving, both animals move steadily at their respective maximum speeds.
An elevator with a mass 2000kg rises with an acceleration of 1m/s^2. What is the tension in the supporting cables
An ultrasonic transducer, of the type used in medical ultrasound imaging, is a very thin disk (m = 0.14 g) driven back and forth in SHM at 1.1 MHz by an electromagnetic coil.
A 0.03 kg (lead) bullethits a steel plate and melts and splatters on impact. Assuming that the bullet recieves 80% of the collision energy, at what minimium speed must it travel to melt on impact? How is this soved without knowing what the bullet ..
What horizontal force is needed to hold bag in new position
The current in a series circuit is 24.0 A. When an additional 22.0-? resistor is inserted in series, the current drops to 16.2 A. What is the resistance in the original circuit
An electric heater consumes electrical energy at a rate of P = 200 W when connected to a battery with an emf of 120 V. What is the current in the heater
A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 11 N. What is the frequency of the fundamental oscillation
A standard 100 W (120 V) lightbulb contains a 9.40 cm-long tungsten filament. The high-temperature resistivity of tungsten is 9.0*10^-7Om. What is the diameter of the filament?
Two cars of equal mass collide on a horizontal frictionless surface. What is the speed of the composite body (AB) after the collision
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