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We live at the bottom of a sea of air. The density of this air at the Earth's surface and 0°C is 1.29 kg/m3. Assume that the density of air does not change as we move away from the Earth.
a) What height would the atmosphere be?
b) Would climbing Mount Everest get you to a place above this height?
c) How high is the outer edge of the atmosphere really?
d) Does a rocket just have to get outside the atmosphere in order to escape from the Earth?
Two crates connected by a rope of negligible mass lie on a horizontal surface. (See the figure.) Crate A has mass mA and crate B has mass mB. The coefficient of kinetic friction among each crate and the surface is k. The crates are pulled to the righ..
A 2 kg mass is held at rest on top of a frictionless and horizontal table. find the tension of the string which supports the hanging mass
Calculate an average value of Us and compute the coefficient of static friction,
The x-component of a velocity vector that has an angle of 31 degrees to the +x-axis has a magnitude of 4.9m/s. What is the magnitude of the velocity
A spherical capacitor contains a charge of 3.70 nC when connected to a potential difference of 220 V. Calculate radius of inner sphere
A 3.3-mC charge is moved through a 150-V potential difference. How much work is required to move the charge
A boxed 11.0 computer monitor is dragged by friction 7.50 up along the moving surface of a conveyor belt inclined at an angle of 36.8 above the horizontal. how much work is done on the monitor by friction
What length in meters would be needed for a runaway
The transformer in the power supply for a computer's 500-GB external hard drive changes a 120-V input voltage, what is the current in the primary and secondary when the drive is in operation
A flywheel having constant angular acceleration requires 4.30 to rotate through 166. Find the angular acceleration of the flywheel
A long rod of lenght " L " and cross sectional area "A" is weighted such that when it is placed in a bucket of water it floats vertically. determine the magnitude of the buoyant force on the rod
in the operation of a hydraulic jack suppose one has area 0.0200 m2 and the other area 0.0500 cm2. the two pistons are
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