Answers edited by Dr.Z

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• How do you write and graph a function that translates #y=sqrtx# by shifting 7 units up?
  
• 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?
  
• Question #4802e
  
• 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?