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Question: A ball is thrown directly downward with an initial speed of 7.85 m/s, from a height of 30.4 m.
Part I: After what time interval dose it strike the ground?
Express your knowledge to solve the above question.
In an insulated container, 300g of ice at aninitial temperature of -5degrees C is added to 550g of water at aninitial temperature of 20degrees C. estimate the amount of ice remaining
Light of wavelength = 580 nm passes through a pair of slits that are 11 µm wide and 215 µm apart. How many bright interference fringes are there in the central diffraction maximum
An object of height 4.7 cm is placed 47 cm from a convex mirror of focal length having magnitude 39 cm. describe the properties of the image
A 3440-kg spacecraft is in a circular orbit a distance1850 km above the surface of Mars. How much work must thespacecraft engines perform to move the spacecraft to a circularorbit that is 4360 km above the surface?
On an air track, a 398.0 g} glider moving to the right at 2.05 m/s} collides elastically with a 501.5 g} glider moving in the opposite direction at 3.20 m/ s} .
A Young's interference experiment is performed with blue-green laser light. The separation between the slits is 0.500 mm, and the screen is located 3.12 m from the slits. The first bright fringe is located 3.22 mm from the center of the interferen..
A skateboarder shoots off a ramp with a velocity of 7.4 m/s,directed at an angle of 55° above the horizontal. The end ofthe ramp is 1.4 m above the ground. Let the x axis beparallel to the ground, the +y direction be verticallyupward, and take as ..
a positive charge of -4 microcoulombs is llocated at the center of a spherical shell of inner radius 2cm and outer radius 3cm, what is the total charge on he inner shell
A certain source of sound waves radiated uniformly i alldirections. At a distance of 15m from the source the intensitylevel is 30dB. What is the intensity of the sound 15m from the source inW/m2
A 1.01kg rolling hoop with a radius of 10.0 cm rolls without slipping. If the linear speed of the hoop is 1.63m/s , find the translational kinetic energy
A javelin is thrown at an initial speed of 28.5 m/s at an initial height of 1.93 m above the ground, Find this maximum range
If a horse starts from rest and accelerates at the maximum value until reaching its top speed, how far does it run, to the nearest 10 {\rm m}
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