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An airplane must have a velocity of 50 m/s in order to take off What must be the airplane acceleration if it is in to take off from a runway 50cm long?
Suppose the tension in a cord is 14.0 N. If the speed of a wave in the cord is 8.50 m/s, then what must be the linear mass density of the cord
Two 4.9 cm× 4.9 cm metal plates are separated by a 0.19-mm-thick piece of Teflon. What is the maximum potential difference between the disks
Identify and explain the three criteria for establishing casue-and-effect relationships between variables. Discuss correlational and experimental designs ability to satisfy these criteria.
Ultraviolet radiation of wavelength 121 nm is used to irradiate a sample of potassium metal. The work function of potassium is 2.25 eV. Calculate the speed of the electrons emitted
A particle moves from Xi = 0 to Xf = 5.0 meter while being acted upon by a single force F = 3X^2 directed along the X axis. Calculate the change in the kinetic energy during this motion
the lob in tennis is an effective tactic when your opponent is near the net. it consists of lofting the ball over his
It takes a force of 80.0 N to compress the spring of a toy popgun 0.200 m to "load" a 0.180-kg ball. With what speed will the ball leave the gun
A house painter is standing on a uniform, horizontal platform thatis held in equilibrium by two cables attached to supports on the roof. How large is the force exerted by the right-hand cable
A uniform disk turns at 3.7 rev/s around a frictionless spindle. Anonrotating rod, of the same mass as the disk and length equal tothe disk's diameter, is dropped onto the freely spinning disk. They then turn together around the spindle with their..
a 3.00 kg object connected to spring with a force constant of 500 N/m oscillates on frictionless horizontal surface. Determine total energy of oscillating system
A man standing on very slick ice fires a rifle horizontally. The mass of the man together with the rifle is 70{\rm kg} , what is the final speed of the man
A light bulb is placed 18.3 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, Calculate the focal length of the concave mirror
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