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Q. King Arthur's knights fire cannon from the top of the castle wall. The cannonball is fired at a speed of 60 m/s and an angle of 33. A cannonball that was accidentally dropped from the top of the castle wall hit the moat below in 1.80s.
(a) How tall is the top of castle wall? (b) How long is the fired cannonball in air? (c) How far from the castle wall does the fired cannonball hit ground? (d) What is the fired ball's maximum height above ground?
A cable is used to raise a 29kg urn from an underwater archeological site. There is a 21 N drag force from the water as the urn is raised at a constant speed.
Illustrate what would be the size of the resulting deadweight loss relative to the competitive outcome.
Why four people must waste their time looking for faults when one person can run test cases on same piece of code. How do you respond?
A sphere consists of a solid wooden ball of uniform density 800 and radius 0.20 and is covered with a thin coating of lead foil with area density 20.
A 17g rifle bullet travelling 220 m/s buries itself in a 3.90 kg pendulum hanging on a 3m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
illustrate what type of unemployment will then occur. What is the natural rate of unemployment.
Mario just invested 12K into an interest bearing account that yields 11.0% Inflation is 6.6%. Find the actual dollar value of Mario's investment be after nine years
On a dry day, just after washing your hair to remove natural oils and drying it in detail, run a plastic comb through it. Small bits of paper will be attracted to the comb. Describe why.
Sketch a document flowchart to depict each of the scenarios given below: Three people, all in different departments, look at the same document before it is eventually filed in a fourth department.
Explain how much profit will the perfectly competitive firms earn. Explain how much profit will the monopoly firm earn.
Six mass pieces of 100g each are placed on a mass holder of 140g which is hung from a string. Analyse the tension in the string.
An electron with the initial speed of 4.00×10^5 is brought to rest by an electric field. What was the initial kinetic energy of electron, in electron volts.
A baseball is thrown straight up. The drag force is proportional to.In terms of, what is the y-component of ball's acceleration when its speed is half its terminal speed and it is moving up.
The diameter of the He atom is approximately 0.10nm. Compute the density of the He atom in (assuming that it is a sphere).
Extimate the thickness of a glass at a bright fringe and the Brewster's angle for light traveling from air to glass.
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
Find out total vector displacement
What is the ratio of the dynamic viscosity of air to that of water at standard pressure and a temperature of 20?C? Find the ratio of the kinematic viscosity of air to that of water for the same condition?
At one instant a bicyclist is 28 m due east of a park's flagpole, going due south with a speed of 8 m/s. after that, 11 s later, the cyclist is 65 m due north of flagpole, going due east with a speed of 10 m/s.
Two metal plates are held together by two steel rivets, each of diameter 0.24cm and length 1.2cm.How much force has to be applied parallel to the plates to shear off both rivets.
A speedboat starts from rest and accelerates at +2.32 m/s2 for 6.78 s. At the end of this time, the boat continues for the additional 5.34 s with an acceleration of +0.677 m/s2. Following this, the boat accelerates at -0.686 m/s2 for 8.68 s.
What portion of jet power lost to producing sound Powdered steel is placed in a container
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