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Is the force of friction the same for different angles of incline if all other parameters are equal? Explain by specifically considering the angles used in the experiment. Angles of 30 and 45 degrees were used with a car being moved up and down the inclined plane.
The position of an object connected to a spring varies with time according to the expression x = (4.4 cm) sin(6.9?t). (a) Find the period of this motion. s (b) Find the frequency of the motion. Hz (c) Find the amplitude of the motion. cm (d) Find ..
Calculate the terminal velocity for a pollen grain falling through the air using the drag force equation. Assume the pollen grain has a diameter of 7 µm and a density of 0.7 g/cm3
The planet Saturn has a satellite, Calypso, which travels in an orbit of radius 2.950×108 m with a period of 1.89 days. Calculate the mass of Saturn from this information
find the net rate of radiation by a pot at 35.7°C that has been placed in a -23.9°C freezer. The pot's surface area is 0.111 m2 and its emissivity is 0.655.
A pebble is released from rest at a certain height and falls freely, reaching an impact speed of 2 m/s at the floor. What is its speed at the floor
A sealed 63 m3 tank is filled with 5000 moles of ideal oxygen gas (diatomic) at an initial temperature of 270 K. determine The mass density of the oxygen gas
The figure shows a thermodynamic cycle consisting of two constant pressure steps (A->B and C->D) connected by two constant volume steps (B->C and D->A). A heat engine operates according to this cycle using a diatomic ideal gas (f = 5).
The emissivity of the human skin is 97.0 percent. Use 35.0 °C for the skin temperature and approximate the human body by a rectangular block with a height of 1.61 m, Calculate the power emitted by the human body
An ideal spring has a spring constant k = 20 N/m. The spring is suspended vertically. What is the magnitude of the acceleration of the body when the extension of the spring is a maximum
A wheel of radius 1.6m rotates at a uniform speed. If a point on the rim of the wheel has a centripetal acceleration of 2.3m/s2 , what is the point's tangential speed
When on the ground, Ian's weight is measured to be 700 N. When Ian is on an elevator, his apparent weight is 805 N. What is the net force on the system
Two children fighting over a toy pull on the toy in different directions. One child pulls to the north with a force of and the other child pulls to the east with a force of What is the magnitude of net force on the toy.
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