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As a space craft approaches a planet, the rocket engines on it are fired to slow it down so it will go into orbit around the planet. The spacecraft's mass is 251 kg and the thrust (force) of the rocket engines is 54 N. If the speed of the spacecraft must be decreased by 135 m/s, how long must the engines be fired. (Ignore the change in mass due to the rocket engines firing).
A submarine dives 110.0 m at an angle of 10.0° below the horizontal. Illustrate what are the horizontal and vertical components of the submarine's displacement?
Electrons with a speed of 1.6×10^6m/s pass through a double-slit apparatus. What speed must neutrons have to produce interference fringes with a fringe spacing of 1.6mm
Monochromatic light falls on a slit that is 2.80*10^-3 mm wide. If the angle between the first dark fringes on either side of the central maximum is 36.0 degrees
An object of mass 50.5 g is initially placed in boiling water so that it is at 101° C. Then the object is dropped into a calorimeter, Find the specific heat of the object
A small rock with mass 0.12 is fastened to a massless string with length 0.80 to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 with the vertical. Air resistance is negligible.
An electric ceiling fan with blades of diameter 0.760m is rotating about a fixed axis with an initial angular velocity of 0.200 rev/s. Through how many revolutions has the blade turned in this time interval
A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t â€" 2.45). Find the total energy of the oscillating spring
Three electrons are located at the vertices of an equilateral triangle, one at each vertex. What is the magnitude of the initial acceleration of each electron
A jogger on a circular track that has the radius of 0.150km runs a distance of 1.10km. What angular distance does the jogger covers in radians.
A spring is hanging from the ceiling. Attaching a 700 physics book to the spring causes it to stretch 27 in order to come to equilibrium. Spring constant 25 N/m: -From equilibrium, the book is pulled down 10cm and released. What is the period of osci..
A ship travels 80 km due north on the first day of a voyage, 50 km northeast on the second day, Find the resultant displacement by the polygon method
how to Calculate the horizontal distance the ball would travel if the same spring were aimed 32 deg from the horizontal.
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