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Question: A star named Teresa has a magnitude of 0 and a star named Beth has a magnitude of -5. Calculate the difference in brightness of the two stars. State which star is brightest.
A wall is composed of two materials, material 1 has a thickness of 3.49 cm and a thermal conductivity of 0.1 J/msCo while material two has a thickness of 7.01 cm, what is the energy loss per second to the nearest watt
A cyclotron with a 0.5 T magnetic field is fed a stream of electrons traveling at 500,000 m/s. Find the radius of their circular orbit
A planet with a mass of 4.47E21 kg is in a circular orbit around a star with a mass of 4.83·1030 kg. The planet has an orbital radius of 1.31E10 m. What is the linear orbital velocity of the planet
A 9.40kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 69.5kJ throughout the projectile's ascent. How much higher would the projectile have gone were air drag negligible.
a square loop of wire with sides of 40 cm is in a uniform magnetic field perpendicular to its area. if the fields
A typical laboratory centrifuge rotates at 4500 rpm. For comparison, find what is the magnitude of the acceleration a test tube would experience if dropped from a height of 0.8 meter and stopped in a 1.0 ms long encounter with a hard floor
Two 150 kg lead spheres are suspended from 130 m -long massless cables. The tops of the cables have been carefully anchored exactly 1.0 m apart.
A 29.5 kg block is connected to an empty 1kg bucket by a cord running over a frictionless pulley. The coefficient of static friction between the table and the block is 0.50 and the coefficient of kinetic friction between the table and the block is..
as an Acapulco cliff diver drops to the water from a height of 48 m, his gravitaional potential energy decreases by 27000J. What is the divers weight in newtons
a system has 1011 binding sites for a protein. of these sites 105 are originally filled. the system moves to a new
A block of mass m slides down a frictionless incline
A 35kg girl is bouncing on a trampoline. During a certain interval after she leaves the surface of the trampoline, How high does she rise during this interval
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