Physics 1
Consider an airplane wing of area 15 m2. The airflow speed over the top of the wing is 205 m/s, while the speed across the bottom is 160 m/s. Estimate the thickness of the wing. What is the lift force on the wing at sea level at 0°C? (Use your estimate.) ____ N
Physics
An object is placed 4 cm in front of a concave lens of focal length 3 cm. Using the lens equation, find where the image will form and state whether it is a real or virtual image.
PHYSICS Urgent help please
A red ball is thrown up off the edge of a building 10 m tall with an initial speed of 4 m/s. A) how long does it take for the red ball to strike the ground below? B) If a black ball is dropped off the edge of the same building, how many seconds after the release of the red bal...
Math
A piece of aluminum with an unknown mass ios at 85c and is placed in a 2.00 liters of water at 25.0c. The final temperature becomes 33c. What is the mass of aluminum?
Math
A 1.00kg piece of aluminum at 90.0c in placed in 4.00 liters (4.00kg) of water at 25.0c. What is the final temperature(Tf)
Physics
A 3000kg satellite orbits the Earth 400km above the equator. find a)The speed of the satellite b) The kinetic energy of the satellite c) The potential energy of the satellite d) The total energy of the satellite
calculus
f(x) = 2 x^3 - 24 x^2 + 90 x + 14 is increasing.
Chemistry
How long would it take a 20Kw heater to warm up 1000 litres of water from 15 degrees to 55 degrees in hours? specific heat of water = 4.18kJ. also How much heat would a block of ice melting at 200Kg per hour absorb? thanks if anyone can help!
Chem
Suppose that a stable element with atomic number 119, symbol Wr, has been discovered. (d) What would be the most likely charge of the Wr ion in stable ionic compounds? (e) Write a balanced equation that would represent the reaction of Wr with water. (f) Assume that Wr reacts t...
algebra
solve quadratic equation x2 + x + (sqrt 3/4)i = 0 complex roots
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