Answers created by Dr.Z

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• Question #4802e
  
• If mass and distance from earth to r is half then what will happen to Gravitational potential energy?
  
• What does the slope of velocity-time graph represent?
  
• Why some impurities are used with semi conductors in the solar panel?
  
• A wrench with a length of #10 cm# is used to unscrew a #5/2 cm# bolt. If a torque of #18 Nm# is needed to overcome the friction keeping the bolt in place, what is the minimum torque that must be applied to the wrench to unscrew the bolt?
  
• How does looking at a spectrum tell us what a star is made of?
  
• How do you calculate the resultant of the following vectors 4.0N and 10.0N with an angle of 90 degrees between them?
  
• How does static electricity related to the net charge of an object?
  
• What is the function of the split ring commutator and carbon brushes in an electric motor?
  
• Question #a6948
  
• How do you write and graph a function that translates #y=sqrtx# by shifting 7 units up?
  
• An object with a mass of #9 kg# is on a plane with an incline of # - pi/4 #. If it takes #24 N# to start pushing the object down the plane and #5 N# to keep pushing it, what are the coefficients of static and kinetic friction?
  
• A truck pulls boxes up an incline plane. The truck can exert a maximum force of #5,700 N#. If the plane's incline is #(2 pi )/3 # and the coefficient of friction is #8/5 #, what is the maximum mass that can be pulled up at one time?
  
• Question #3b038
  
• Question #feb3b