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You are designing an airport for small planes. One kind of airplane that may use this airfield must reach a speed of at least 27.8m/s (100 km/h), and can accelerate at 2m/s*2.
a. If the runway is 150m long, can this plane reach the require speed for take off?
b. If not, what minimum length must the runway have?
Two children are playing on a balanced seesaw. One child with a mass of 48 kg sits 1.4 m from the center. Where on the other side must the second child sit
Suppose you wish to lean a 3.00 m ladder against a smooth, vertical wall. The ladder's center of gravity is 2/3 of length from the top. If the coefficient of static friction between the ladder and the floor is 0.60, what is the largest angle ladde..
A wall in a house contains a single window. The window consists of a single pane of glass whose area is 0.18 m2 and whose thickness is 7 mm. what is the percentage lost by the window
Glycerine in water diffuses along a horizontal column that has a cross-sectional area of 2.0 cm2. The concentration gradient is 3.2 10-2 kg/m4, and the diffusion rate is found to be 5.9 10-15 kg/s. Determine the diffusion coefficient.
an electron is shot at an initial speed of v0 = 2.00 × 106 m/s, at an angle ?0 = 35.0° from an x axis. It moves through a uniform electric field = (5.00 N/C), find the velocity of the electron when it hits the screen
An ideal spring is used to fire a 15.0-g block horizontally. The spring has a spring constant of 40 N/m, The kinetic energy of the pellet as it leaves the spring is
a 142 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizantal is increased to ALPHA, If the coefficient of static friction between the crate and the ramp is 0.65, what is the angle alpha when the crate just begins t..
Find the thermal efficiency and the specific work of a simple Rankine cycle if the maxium temperature and pressure are 1050oC and 5.0 MPa and the minimum pressure is 20 kPa.
An unknown resistor is connected between the terminals of a 5.5 V battery. At what rate is energy now dissipated
Two cylinders each contain 0.30 mol of a diatomic gas at 300 K and a pressure of 3.0 atm. What is the final temperature of the gas in the cylinder A
Light of wavelength 450 nm falls on the 0.48 mm wide slit and forms a diffraction pattern on a screen 1.1 m away.
Equipotential surface A has a potential of 5650 V, while equipotential surface B has a potential of 7850 V. How much work is done by the outside force in moving the particle from A to B
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