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A spring is placed in a vertical position with its lower end supported by a horizontal surface. A stone of mass 4.0 kg is rested on the spring and compresses the spring by 0.02 m. The same spring is then placed horizontally and used to launch the stone along the smooth horizontal surface. The spring is compressed by 0.08 m by the stone and then the spring is suddenly released. What is the speed at which the stone leaved the spring?
A horizontal wire is hung from the ceiling of a room by two massless strings. The wire has a length of 0.21 m and a mass of 0.005 kg. A uniform magnetic field of magnitude 0.070 T is directed from the ceiling to the floor
Brass is an alloy of copper and zinc. Does the addition of zinc to copper reason an increase or decrease in the speed of sound in brass rods compared to copper rods? Describe.
An atomic nucleus of mass 288 u moving at 405m/s emits an alpha particle of mass 4.0 u in the direction of its velocity. If the remaining nucleus slows to 360m/s, what velocity does the alpha particle have when it is emitted.
You absentmindedly solder a 62.8kohm resistor into a circuit where a 44.8kohm should be. What is the resistance of this resistor
A 2600 kg truck traveling north at 38 km/h turns east and accelerates to 52 km/h. What is the change in the truck's kinetic energy? What is the magnitude of the change in the linear momentum of the truck?
Two objects have masses m and 5m respectively.They both are placed side by side on a frictionless inclined plane and allowed to slide down from rest.
A 3.0 m organ pipe is open at both ends and contains air. The velocity of sound in air is 331 m/s. What is the wavelength of the lowest frequency mode in m
A student draws the ray diagram shown in the figure but forgets to label the object, the image, which arrow represents the object, and which represents the image
Doubling the total energy of a particle: (a) Does not affect its momentum (b) quadruples its momentum (c) more than doubles the momentum (d) doubles its momentum (e) less than doubles its momentum I know the answer is (c) but what equation is used to..
Water flows over a section of Niagara Falls at the rate of 1.1 x10^6 kg/s and falls 55 m. How much power is generated by the falling water.
A thin spherical shell has a radius of 2.3 m and a mass of 450 kg, and its center is located at the origin of a coordinate system. find the gravitational force of attraction between the two shells
q1. an object weighs 302 n in the air. when tied to a string connected to a balance and immersed in water it weighs 220
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