Answers created by PJ

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• What is the diference between law of gravitation and universal law of gravitation?
  
• How are temperature on Celsius and Kelvin scales related?
  
• Why heat pumps do not work as well in very cold climates as they do in milder ones. is the same true of refrigerators?
  
• What are the three types of heat transfer?
  
• Can someone solve these questions?( Melting and boiling chapter)
  
• What is the name of the laboratory instrument for measuring the wave length of some radiation ?
  
• One watch is 1 minute slow at 1 pm on Tuesday and 2 minutes fast at 1 am on Friday. When did it show that correct time?
  
• How many trains do not stop at either of these stations on that day?
  
• The movie starts at 3:15p.m and ends at 5:08 p.m how long is the movie?
  
• How come there are no solutions to the equation, #sqrtx = - 10#?
  
• Why is alternating current used in homes?
  
• A Convenience store sells two brands of orange juice.Brand A contains 8 fluid ounces and cost $1.28.Brand B countains 12 fluid ounces and cost $1.68.What is the difference in cost,in dollars,per fluid ounces between the two brands of juice?
  
• If a parachutist free falls, assuming he reaches terminal velocity, what is the force with which he hits the ground if he fails to open parachute?
  
• What is dendrochronology?
  
• A movie rental store charges a membership fee of $10.00 plus $1.50 per movie rented. What is a possible domain that shows the cost to a member of renting movies?
  
• A rectangle has a perimeter of 50 cm. If the ratio of its length to its width is 3:2, find the length of the rectangle?
  
• How do you combine like terms in #(6n ^ { 3} - 7+ 6n ^ { 2} ) + ( 4- 7n ^ { 2} - 6n ^ { 4}) + (8n^4 - 8n )#?
  
• What is a mineraloid?
  
• Can u help me find the rate of change for the situation? A chef cooks 9 lbs of chicken for 36 people and 17 lbs of chicken for 68 people?
  
• Cups A and B are cone shaped and have heights of #29 cm# and #33 cm# and openings with radii of #7 cm# and #12 cm#, respectively. If cup B is full and its contents are poured into cup A, will cup A overflow? If not how high will cup A be filled?
  
• Frequency modulation is best achieved at what stage in a transmitter?
  
• A 36-tooth gear turns three times. It is connected to a 12-tooth gear. How many times does the 12-tooth gear turn?
  
• One end of uniform stretcher is to be lifted from floor so that the other end may be considered to be the pivot point. The stretcher is 2m long and its mass is 20kg .how much force to lift your end, what is the mechanical advantage?
  
• The sum of a number and two times a smaller number is 62. Three times the bigger number exceeds the smaller number by 116. The bigger and smaller number is what?
  
• Cars P and Q start the journey from the stationary at the same time and each accelerates with the acceleration # a # and #3ms ^ - 2#. After 2 seconds, P leads Q by 6 m. Find # a #?
  
• The Scales model of a skyscraper being built is 4.2 ft tall When Is The skyscraper will be 525 meters tall what scales was used to make the model?
  
• One pump can fill a water tank in 40 minutes and another pump takes 30 minutes? How long will it take to fill the water tank if both pumps work together?
  
• The length of a rectangle is 3 times the width. The perimeter is 96 cm. How do you find the width and length?
  
• How does force relate to work?
  
• What is 25 mi/hr converted to m/min?
  
• The output of a certain voltage divider is 12 V with no load. When a load is connected, does the output voltage decrease?
  
• Why is the Thevenin's theorem important for circuit diagrams?
  
• Astudent hears a police siren. What would change the frequency that the student hears?
  
• If I have two parallelograms and all the corresponding sides are equal can I say that they are congruent?
  
• See image below. What is the current through the 8 Ω resistor?
  
• What is the molar mass of silver nitrate?
  
• In a certain recipe, the ratio of the number of cups of water to the number of cups of flour must be 3:2. How many cups of flour are needed to make three mixtures of such recipe?
  
• A 5m long ladder leans against a wall, with the top of the ladder being 4m above the ground. What is the approximate angle that the ladder makes with the ground?
  
• A boat is sailing due east parallel to the shoreline at a speed of 11 miles per hour. At a given time, the bearing to the lighthouse is S 70° E, and 30 minutes later the bearing is S 63° E (see figure). The lighthouse is located at the shoreline. help?
  
• You are rotating a bucket of water in a vertical circle. Assuming that the radius of the rotation of the water is 0.95 m, what is the minimum velocity of the bucket at the top of its swing if the water is not to spill?
  
• One fish is 4 feet below sea level. Another fish is 3 feet below sea level. Writing each position as an integer, which integer is greater?
  
• Can someone help me answer this cal/h question?
  
• Could anyone please help me with this question?
  
• Matt saves the same amount each week. At end of 3 weeks he has $12. How many weeks will it take him to 36$?
  
• Two drainpipes working together can drain a pool in 12 hours. Working​ alone, the smaller pipe would take 18 hours longer than the larger pipe to drain the pool. How long would it take the smaller pipe alone to drain the​ pool?
  
• How do you factor #x^3 - 3x^2 = 0#?
  
• I planted a 3 ft tree that has grown the same amount each year.at the end of the third year , the tree was 1/5 taller than it was at the end of the second year .the tree is now 18 feet tall. How many years ago did I plant the tree?
  
• A rectangular window frame measures 24 inches by 36 inches. if trim for the window costs $ 2.75 per linear foot, how much will it cost to put trim around the window?
  
• How do you solve the system of equations by graphing and then classify the system as consistent or inconsistent #9x-4y=12# and #4y-9x=-12#?
  
• Hugh has to earn at least $400 to meet his fundraising goal. He has only 100 books that he plans to sell at $8 each. Which inequality shows the number of books, x, Hugh can sell to meet his goal?
  
• Algebra question?
  
• An airplane flies an altitude of 38,000 feet. As it nears the airport, the plane begins to descent at a rate of 600 feet per minute. At this rate, how many minutes will the plane take to descent to 18,800 feet?
  
• Twice a number decreased by the sum of half the same number and 6 is equal to nine. What is the number?
  
• What kind of math is important for Computer Science?
  
• What is .01 as a percent?
  
• Rick wants to buy a pound of almonds. If a 1-pound bag costs $6.15 and a 4-ounce bag costs $1.85, how much money would Rick save by buying the 1-pound bag instead of multiple 4-ounce bags?
  
• How would you demonstrate the photoelectric effect?
  
• How do harmonics and overtones for a given fudamental tone differ from each other?
  
• How do you solve #2x+22=0# by graphing?
  
• What are all of the simple machines found in a washing machine?
  
• An antique jar priced at 30,000 pesos Increases its value by 10% every Year, how Much will it cost after 5 years?
  
• A 90v charge is applied acrosd 10ohm and 20ohm resistor in series what would be the current in 20ohm resistor?
  
• Can a mixture be separated by evaporation?
  
• What is the voltage-time graph for an inductor when the switch closes?
  
• If there is a cup filled with water and oil and I turn it upside down which one of this liquids will be first to hit the ground?
  
• Lito and Lando pull 2 ropes attached to a cabinet with forces 80 N and 120 N. What is the resultant force if they pull at right angle to each other?
  
• You have two candles of equal length. Candle A takes six hours to burn, and candle B takes three hours to burn. If you light them at the same time, how long will it be before candle A is twice as long as Candle B? Both candles burn st a constant rate.
  
• Ella and three friends run in a relay race that is 14 miles long. Each person runs equal parts of the race. How many miles does each person run?
  
• How can momentum be decreased?
  
• A) A gas-fired heat exchanger uses gas with energy value of 40MJ / m^3 at a rate of 0.4 m^3/h and produces 50kg/h of water at a temperature of 70^oC from feed water at 20^oC. The rest of the question is in the picture attached.PLZ help?
  
• Tyler needs at least $205 for a new video game system. He has already saved $30. He earns $7 an hour at his job. Write and solve an inequality to find how many hours he will need to work to buy the system. Interpret the solution._?
  
• Which describes the first step in solving the equation x-5=15? A. Add 5 to each side B. Add 12 to each side C. Subtract 5 from each side D. Subtract 12 from each side
  
• If you roll two dice, the probability that you roll a sum of 10 is approximately 0.083. What is the probability that you first roll a ten on the 10th roll? What is the average number of rolls until you first roll a 10?
  
• How deep is the water in the trough if a water trough is in the shape of a rectangular prism that is 12 feet long by 3 feet wide and has 9.4 cubic feet of water?
  
• How do resistors affect capacitors?
  
• How do simple machines change the direction of force?
  
• On a farm, the number of chickens was more than the number of ducks. After 20% of the chickens were sold, there were 800 less chickens than ducks on the farm. How many ducks were there on the farm? ___ducks
  
• Is it possible for immiscible liquids to react with each other?
  
• A car rolling down a hill accelerates from rest to 22m/s in 40s. What is the average velocity of the car? What is the displacement of the car as it rolls down the hill?
  
• 9 oz of Ted's special coffee blend was made by combining 3 oz of brand X coffee which costs $6/oz with 6 oz of brand Y coffee which costs $12/oz. What is the cost per oz of the mixture?
  
• What will happen when photons moving in opposite directions collide?
  
• What is the light in the region of the electromagnetic spectrum that is higher in energy than visible light?
  
• How do you write the equation for this reaction: Nitrogen gas and fluorine gas combine to produce nitrogen trifluoride gas?
  
• Tom bought these three T-shirts at the sale price of $14.50. How much money did he save compared to the original total price of the T-shirts?
  
• 1. Explain how the potential difference (voltage) in a battery is similar to a staircase. ?
  
• What is the length of air column?
  
• How do you solve the system of equations #2.5x+y=-2# and #3x+2y=0#?
  
• What is the sum of all the integers between 13 squared 113 squared ?
  
• Jeanie has a 3/4 yard piece of ribbon. She needs one 3/8 yard piece and one 1/2 yard piece. Can she cut the piece of ribbon into the two smaller pieces? Why?
  
• How do you graph #f(x) = 6^x# by plotting points?
  
• The dinner check was $58.00. If Fay gave the waiter a 20% tip, how much did she spend in all?
  
• 1 is what percent of 52.6?
  
• How do vehicles vertically take off or land?
  
• How do you write #(6x^3 − 8x − 5) + (3x^3 + 6x + 2)# in standard form?
  
• An object with a mass of #18 kg# is hanging from an axle with a radius of #16 cm#. If the wheel attached to the axle has a radius of #28 cm#, how much force must be applied to the wheel to keep the object from falling?
  
• A pedal bicycle fitted with electrical motor the rider switch on the motor for 3.0 min.a constant current of 3.5A in the electrical motor is provided from baterry with a terminal voltage 24v.what is the energy supplied by the baterry?
  
• How do you find the general form of the line with slope -2 passing through the point (-4, 6)?
  
• What is the rule for the sequence 3,4,7,12?
  
• Can someone help me answer this question? 'find the exact value of Cos theta, given sin theta = 5/9 and cos theta < 0