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Question: A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 7.90 m/s at an angle of 23.0° below the horizontal. It strikes the ground 5.00 s later.
(a) How far horizontally from the base of the building does the ball strike the ground?
(b) Find the height from which the ball was thrown. Your response differs from the correct answer by more than 10%. Double check your calculations.
(c) How long does it take the ball to reach a point 10.0 m below the level of launching?
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8280 decays per minute to 3035 decays per minute over a period of 4.50. What is the half life of the isotope in days?
A block with a mass of m is resting on a 20 degree slope. The block has coefficients of friction 0.81 and 0.55 with the surface. What is the minimum mass that will stick and not slip
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A car is speeding at a constant 25 m/s (56 mi/h) in a school zone. A police car starts from rest just as the speeding car passes by it and accelerates at a constant rate of 5.0 m/s2. How fast is the police car traveling when it catches up with the ..
An electron has a total energy of 7.0MeV. What is its momentum in (answer in kg*m/s)
An arrow is shot at 30.0 degrees above the horizontal. Its velocity is 49 m/s and it hits the target. What is the maximum height the arrow will attain
Shown in Figure is a cylinder of mass m connected to a spring of stiffness k excited through viscous friction c to a piston with motion y = A sin wt.
An empty parallel plate capacitor is connected between the terminals of a 7.0 V battery andcharged up. The capacitor is then disconnected from the battery,and the spacing between the capacitor plates is quadrupled. As a result of this change, what is..
What must be the angle between the direction of propagation of the incident and scattered photons if the speed of the electron immediately after the collision is 8.90 × 106 m/s
Assume the zero potential level is at the initial equilibrium position of the bottom of the block shown in the diagram.
Ignoring friction and treating the gymnast as if all of his mass is located at his waist, find his speed at the bottom of the swing.
What are the major types of white blood cells and their precursor cells in terms of cytoplasmic and nuclear sizeand staining (pattern & colour).
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