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A block with mass m1 = 9.4 kg is on an incline with an angle ? = 33.0° with respect to the horizontal. For the first question there is no friction between the incline and the block. When there is no friction, the magnitude of the acceleration of the block== 5.33 m/s2 Now with friction, the acceleration is measured to be only a = 3.58 m/s2. the coefficient of kinetic friction between the incline and the block== .213 ********To keep the mass from accelerating, a spring is attached with spring constant k = 166.0 N/m. What is the coefficient of static friction if the spring must extend at least x = 15.0 cm from its unstretched length to keep the block from moving down the plane?
Calculate the de Broglie wavelength for an alpha particle (He-e nucleus) with energy E = 4.2 GeV (which is emitted in the radioactive decay of U-238)
In the fastest measured tennis serve, the ball left the racquet at 73.14 {\rm{ m/s}}. How far did the ball travel during the serve
a coil has an inductance of l=0.65mh and resistance of r=0.75 ohms . it is connected to the terminals of a battery with a emf of 1.5V, find the final steady-state or equilibrium current
The Big Bang theory states that the beginning of the universe was accompanied by a huge burst of photons. Calculate the peak wavelength of this radiation
An open organ pipe has its fundamental frequency at 320 Hz. The first overtone of a closed organ pipe has the same frequency as the first overtone of the open pipe, How long (in meters) is the closed pipe
The aircraft carrier John F. Kennedy has mass 7.4 107 kg. When its engines are developing their full power of 280,000 hp, the John F. what is the magnitude of the force of water resistance
A 4.00mm -tall object is 27.0cm from the center of a silvered spherical glass Christmas tree ornament 6.00cm in diameter. What is the position of its image
An engineer wishes to determine the specific heat of a new metal alloy. A 0.150-kg sample of the alloy is heated to 540°C. Calculate the specific heat of the alloy
A ball of mass 0.40 kg is fired with velocity 140 m/s into the barrel of a spring gun of mass 2.1 kg initially at rest on a frictionless surface. What fraction of the ball's initial kinetic energy is stored in the spring
Consider a stack of paper 3.0 meters high. each sheet of paper is the stack has a thickness of 0.01 centimeter
Suppose there are two transformers between your house and the high-voltage transmission line that distributes the power. In addition, assume that your house is the only one using electric power. At a substation the primary coil of a step-down tran..
A wire loop of radius 0.1 m has a 2-ohm resistance. A uniform magnetic field perpendicular to the plane of the loop increases from zero to 2 T in 0.01 s
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