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Suppose a flat roof has a surface area of 1.18000×102 m2. Presume the air inside the building (and under the roof) is at atmospheric pressure, 1.01325×105 Pa, and that the air racing across the top of the roof is at a pressure of 9.93311×104 Pa. What is the force with which the air inside the house pushes the roof upward? What is the force with which the air outside the house pushes the roof downward? (again, calculate this value to 5 significant digits) The lift force takes into account the sum of these two forces. What is the lift force acting on the roof?
A carbon resistor is to be used as a thermometer. On a winter day when the temperature is 4.00?C, What is the temperature on a spring day when the resistance is 216.0
A bird flies 3.05 km due west and then 3.26 km due north. Another bird flies 1.03 km due west and 1.16 km due north. Determine the angle with respect to the 2nd bird's displacement vector
Consider the process AB is this TS diagram for 2 moles of SO3 with all degrees of freedom active. calculate the heat input to the gas
What is the size of the force on the wireA horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50° S of W. What is the size of the force on the wire
3 Mass points each of mass m are placed at the vertices of an equilateral triangle of side l. What is the gravitational feild and potential due to 3 masses
A potential difference of 81 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a positive sodium ion (Na+) from the interior of the ce..
A charge of -4 x 106 coil is moving at 800 m/s along a path parallel to a horizontal straight wire and is 20 cm above it. find magnitude and direction of the force on the charge
With brakes fully applied, a 1670 kg car deccelerates from a speed of 77.0 km/hr. What is the change in the kinetic energy of the car
Determine the acceleration of the bullet while in the barrel? A bullet in a rifle barrel does not have constant acceleration, but constant acceleration is to be assumed for this problem.
A neutron collides elastically with a helium nucleus (at rest initially) whose mass is four times that of the neutron. What is the speed of the neutron after the collision
In a proton accelerator, the energy of proton is 20MeV, the diameter of the beam is 2.0mm, Find the current density and the particle density in the beam
A ball is dropped from a height of 4 m and makes an elastic collision with the ground. Assume that no mechanical energy is lost to air resistance. Is the motion simple harmonic
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