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A small button placed on a horizontal rotating platform with diameter 0.310m will revolve with the platform when it is brought up to a rotational speed of 44.0 rev/min , provided the button is a distance no more than 0.149m from the axis
A) What is the coefficient of static friction between the button and the platform?
B) How far from the axis can the button be placed, without slipping, if the platform rotates at 59.0rev/min?
a 7.4 cm-diameter-baseball has a mass 145 g and is spinning at 2000 rpm. Treating the baseball as a uniform solid sphere, whats its angular momentum
In the semiconductor industry, an insulating layer can be built onto silicon devices by oxidizing the silicon to form silica, SiO2, Write down a balanced equation for the reaction between silica and HF.
In an electron microscope, there is an electron gun that contains two charged metallic plates 2.65 cm apart. Determine the time interval the electron spends between the plates
a radiator has an emassivity of .90 and its exposed area is 1.23 m^2. What is the heat flow rate from the radiator
the position of a particle is given by the expression x=4cos(3pt+p), where x is in meters and t is in seconds. estimate the frequency and the period of the motion
Since CO2 is a liquid at this pressure and temperature would it form rivers, lake or oceans of liquid CO2 mixed with liquid water or will it stay in a gaseous form because of its lower abundance of other gases and the overall density of the atmosp..
A lamp (R = 145 ), an electric heater (R = 24 ), and a fan (R = 49 ) are connected in parallel across a 121 V line. What is the current in the lamp
What is effectiveness of battery as an energy storage device
A small object is placed to the left of a convex lens and on the optical axis. What is the position of the image formed by the lens
A train slows down as it rounds a sharp horizontal turn, going from 80.0 km/h to 58.0 km/h in the 13.0 s that it takes to round the bend. Compute the acceleration at the moment the train speed reaches 58.0 km/h
For an RLC circuit with a resistance of 15 Kohms , a capacitance of 9 uF and an inductance of 31 H , what frequency is needed to minimize the impedance
A 4m long wire with thickness 5mm carries a current 0.4 A. A second identical wire of equal length and thickness is parallel and carries 0.6 A in the same direction. What is the force of the first wire on the second wire
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