An airplane has an effective wing surface area of 22.6 m2 that is generating the lift force. In level flight the air speed over the top of the wings is 75.0 m/s, while the air speed beneath the wings is 60.0 m/s. What is the weight of the plane?

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A Stirling Engine uses 8.1 x 10^-3 mol of an ideal gas, operates between hot and cold heat reservoirs of temperatures 95 degree celsius and 24 degree celsius, and runs at a rate of 0.7 cps. Q) What is the net transfer into the gas during in cycle?

A wood cube of volume 0.200 cubic meters floats with 30% of its volume above fresh water. How big is the buoyant force

3) A car rounds a circular curve of radius 80.0 m banked at 15⁰ to the horizontal at 30.0 m/s. What is the coefficient of friction required for the car not to skid? Some hints. first, set the x-axis as horizontal, and the y-axis as vertical (this is different than how we normally handle inclines). Second, there will be 3 forces: the normal force (with x- and y- components), the force of gravity (y-component only), and friction pointing down the slope (also with x- and y-components).

A one-story house is heated with natural gas, which gives off 3.890 107 J of energy for every cubic meter of gas burned. Take the average temperature difference between the inside and outside for the 120-day heating season to be 12

What is the signicance of an energy of E = 0 of the electron in a hydrogen atom

A race car starts from rest, accelerates at a constant rate of 3.8 m/s^2 for 23s, and then brakes (decelerates) at a constant rate of 5.6 m/s^2 (magnitude) until it comes to a stop. (a) Find the total distance traveled by the car before coming to rest. (b) Draw a graph of the velocity vs. time, and indicate numerical values of any “special points”on the graph.

Many descriptions about matter-antimatter asymmetry starts with the statement that observed baryon to photon density (about 6.1x10^(-10)) is too small. What is the reason? What ratio is expected?

The angular position of a point on the rim of a rotating wheel is given by θ = 3.38t - 2.46t2 + 2.61t3, where θ is in radians and t is in seconds. What are the angular velocities at (a) t = 1.17 s and (b) t = 9.53 s? (c) What is the average angular acceleration for the time interval that begins at t = 1.17 s and ends at t = 9.53 s? What are the instantaneous angular accelerations at (d) the beginning and (e) the end of this time interval?

QUESTION 7 (6 + 6 = 12 marks)
(a) With the aid of appropriate diagrams, explain the following three polarization mechanisms amongst
dielectric materials: (i) electronic, (ii) ionic and (iii) orientational.
(b) For diamond, solid KCl, and liquid Hg (mercury) what kind(s) of polarization (e.g. electronic, ionic
and/or orientation) is (are) possible?

In a Compton scattering experiment, an x-ray photon scatters through an angle of 16.6

Ironman steps from the top of a tall building. He falls freely from rest to the ground a distance of h. He falls a distance of h/ 4 in the last interval of time of 1.0 s of his fall.

Hint: First, compute the velocity when Ironman reaches the height equal to the distance fallen. This requires that you do the following: define origin as the bottom of the building. Then use x-x0 = -v0*(t-t0)-(1/2)g(t-t0)^2 where x=0 and x0= (distance fallen) and t-t0 is the time interval given. In this formulation, you are going to get magnitude of v0 since you already inserted the sign. You then insert v0 that you just calculated into the kinematic equation that involves v, g, and displacement (v^2-v0^2 = 2g(height-(distance fallen)), but now v (which is the final velocity is v0 from above) and v0 in this case is the velocity that the Ironman has when he begins to fall, which is 0. This gives a quadratic equation for height h, and you will need to use the binomial equation to solve for h. Choose the larger of the two solutions.

Part A

What is the height h of the building?

Express your answer using two significant figures.

Two 10-cm-diameter charged rings face each other, 15 cm apart. The left ring is charged to − 30 nC and the right ring is charged to + 30 nC.

What is the magnitude of the electric field E⃗  at the midpoint between the two rings?

What is the direction of the electric field E⃗  at the midpoint between the two rings?

What is the magnitude of the force on a proton at the midpoint?