In a physical change, the molecules inside a substance_____________before and after.

A.stay the same
B.change
C.vary between
D.travel between

ten less than four times a number is 50the equation is -----the solution is ------ help ; choose one answer !! Based on what you have learned, choose the correct statements about the Oregon and California Trails. Check all that apply.The California Trail was used before the Oregon Trail.The Oregon Trail led pioneers to rich farmlands, where they settled.The California Trail split off from the Oregon Trail at the Rocky Mountains.The Oregon Trails mountain passess made it a more difficult journey than the California Trail.The California Trail mainly attracted pioneers seeking gold, especially after 1848. (please help!) A 60Kg crate is pulled with a force of 400N at an angle of 30 degrees above the horizontal. A 150N force resists sliding of the crate. (Be sure to do a sketch (FBD)A) Calculate the weight of the crate:B) Calculate the components of the 400N force: Fx = ___________. Fy = ____________C) Calculate the normal force on the crate: D) Calculate the acceleration of the crate:E) Calculate the speed of the crate if it started from rest after t = 4 s Solve for x: 2 | x -1 | = 8 PLZ Help Your school carnival charges $2 for admission and $.50 foreach game. You go to the carnival with $5.50. Write and solvean inequality that represents the possible number of gamesyou can play. What is the maximum number of games you canplay? A 5.0-g object carries a net charge of 3.8 micro-Coulomb. It acquires a speed v when accelerated from rest through a potential difference V. A 2.0-g object acquires twice the speed under the same circumstances. What is its charge? !!I NEED HELP!!What is a benefit to utilizing fusion reactions instead of fission reactions?A)Fusion reactions do not require any kind of radiation shielding to prevent exposure.B)Fusion reactions do not produce harmful radiation and transuranium nuclides.C)Fusion reactions can proceed in any temperature range.D)Fusion reactions are easier to control and regulate. These the flow of electrons (the current) and where some of electrons energy gets converted into heat a. electric currents b. Insulators c. Resistors e. conductors An element has three isotopes. The masses and % abundances for the isotopes are: Isotope #1 mass 38.96 amu, % abundance=93.26%, Isotope #2 mass39.96 amu, % abundance 0.012 %, and Isotope #3 mass= 40.96 amu, % abundance=6.73 %. The average atomic mass for this element has to be Which of the following statements best characterizes how developed and developing countries impact the environment? A. Neither developed nor developing countries have had a significant impact on the environment in the past century. B. Developed countries have tended to improve the environment, while developing countries have tended to damage it. C. Developed countries have damaged the environment, while developing countries have had little impact. D. Both developed and developing countries have had significant negative impacts on the environment. Please select the best answer from the choices provided.I'm Confused Define rivalry and excludability and use these terms to discuss the four categories of goods. Rivalry is the situation that occurs when 100 POINTS!!!How will the 2010 Supreme Court decision (Citizens United) allowing unlimited campaign funding by corporations and individuals affect public policy over the next ten years, particularly relative to control by voters. Discuss how it could impact major and minor policy areas. Given the following equation...Fe + H2SO4 Fe2(SO4)3 + H2What is the charge (oxidation number) of Fe in Fe2(SO4)3 in 334 g of Fe2(SO4)3 ? (use atomic masses rounded to the nearest whole number.) How do historians use the skill of periodization?O A. To organize history into distinct units with shared featuresO B. To decide what really happened in ancient historyO C. To create timelines showing many different eventsO D. To figure out when certain events actually happenedSUBMITHow do historians use the skill of periodization? Whos ready for Christmas Break? Time to start wearin heavy clothes, sit by the fireplace watchin the snow fall as your drinkin hot chocolate gettin all warm and cozy under tons of blankets. 5Determine the value of x in the figure shown.A) 14B) 53C) 29D) 24 Products do what? what do products do in science A particular fruit's weights are normally distributed, with a mean of 331 grams and a standard deviation of 23 grams. If you pick 15 fruits at random, then 14% of the time, their mean weight will be greater than how many grams? Find the coordinates of quadrilateral "WXY' after a dilation with the scale factor of 2.Original coordinates:V(6, 2), W2,4), X-3, -2), Y(3, -5), scale factor of 28W0 -861012NEED HELP ASAP