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Scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. In one test, this gun accelerates a 7.5-kg projectile from rest to a speed of 7.0 × 103 m/s. The net force accelerating the projectile is 6.2 × 105 N. How much time is required for the projectile to come up to speed?
The wingspan (tip-to-tip) of a Boeing 747 jetliner is 59 m. The plane is flying horizontally at a speed of 290 m/s. Find the emf induced between the plane's wing tips
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C and 16.9 mm from a second point charge is 1.30 kV
A defensive lineman of mass M = 115 kg makes a flying tackle at vi \= 4.00 m/s on a stationary quarterback of mass m = 76 kg, calculate the shear stress exerted on the bone in the collision.
A convex mirror has a focal length of -39.0 cm. A 12.0 cm tall object is located 41.0 cm in front of this mirror. Using a ray diagram drawn to scale, determine the size of the image
The diameter of the He atom is approximately 0.10nm. Compute the density of the He atom in (assuming that it is a sphere).
A rod is measured to be exactly 19.80 cm long using a steel ruler at a temperature of 21.1°C. What is the coefficient of thermal expansion for the material of which the rod is made
A beam of quasimonochromatic light having an irradiance of 500 watts per square meter is incident in air, Determine the reflectance and transmittance
a projectile is shot from the edge of a cliff 115m above the ground level with a inital speed of 65.0m/s at an angle of 35 degrees
A 100kg elevator starts from rest. It moves upward for 4s with constant acceleration until it reaches its crusing speed of 2 m/s. What is the average power of the elevator during this time interval
A beam of light is incident from air on the surface of a liquid. find the critical angle for the liquid when surrounded by air
Which object posses more gravitational potential energy: a 2-kilogram ball at 2.2 meters above the ground or a bullet that is .15 kilograms at a height of 74 meters above ground
The density of a 3.61 m long rod can be described by the linear density function lambda(x) = 103 g/m + 10.3x g/m^2. determine the center-of-mass coordinate
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