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• yosef applies an input force of 50 n to a crowbar. the crowbar applies a force of 750 n to the lid of a crate. what is the mechanical advantage of the crowbar? the mechanical advantage of the crowbar is .
  
• kumar is producing the photoelectric effect by using red light. he wants to increase the energy of emitted electrons. based on the research of albert einstein, what is the best way for him to do this? increase the intensity of red light. decrease the intensity of red light. use a different colored light that has a higher frequency. use a different colored light that has a lower frequency.
  
• why was federalists an appropriate name for alexander hamilton’s political party?
  
• janet’s photography, inc., is made up of a team of professional wedding photographers. the company has no physical storefront and does all of its business online. janet’s photography is an example of a(n) _____ business.
  
• most of the goods produced in japan are sent out of the country to be sold in global markets. this fact makes japan which type of economy? a. command b. export c. import d. traditional
  
• a scientist has discovered a new plant species in the amazon rainforest. she tells her fellow scientists that the plant she has found produces a cone. what might they say about how this plant is different from an angiosperm? its seeds have one or two cotyledons. its stems' vascular bundles are scattered. it does not depend on insect pollination. it is a seeded vascular plant.
  
• what is the best reason for jacinta to have a savings account in addition to a checking account?
  
• trevor is pushing two boxes across a sidewalk. box a has a mass of 4 kg. box b has a mass of 8 kg. according to newton's second law of motion, if trevor applies the same amount of force to each box, a. box b will accelerate at twice the rate of box a. b. box a will accelerate at twice the rate of box b. c. box a and box b will accelerate at the same rate. d. box b will move twice the distance of box a.
  
• ms. jones brought this rock to her science class and instructed her students to explain how it was formed. which explanation is a true description of the rock? a plant fossil imprint on a rock a. leaves were trapped between layers of sediment millions of years ago, causing the imprint. b. leaves grew from the crevices of the rock from the right balance of light, nutrients, and moisture. c. the alternating imprinted design is the result of hot and cold spots when the rock cooled millions of years ago. d. a rock under high temperature and pressure pressed against the leaves, turning the leaves to stone.
  
• which expression correctly represents “eight times the difference of four and a number”? 8 (n minus 4) 8 (4 minus n) 8 (n) minus 4 8 (4) minus n