Maths Group11

Which of the following statement is true? A. All rational functions can be polynomial functions. B. All polynomial functions can be rational functions. C. All constant functions can not be rational functions. D. All zero functions can not be a polynomial functions. Write your answer under the comment! 🙏

Maths group11. Physics questions for grade 12 students about simple machine. From grade 9 unit 5. 1. What is the formula for calculating the mechanical advantage (MA) of a lever?    A) MA = Load / Effort     B) MA = Effort / Load     C) MA = Distance moved by effort / Distance moved by load     D) MA = Weight of load / Weight of effort  2. If a lever has a load arm of 4 meters and an effort arm of 2 meters, what is its mechanical advantage?    A) 0.5     B) 1     C) 2     D) 4  3. In a pulley system, if you have 3 pulleys and the load is 150 N, what is the effort required to lift the load?    A) 50 N     B) 75 N     C) 100 N     D) 150 N  4. Which of the following statements about an inclined plane is true?    A) It decreases the distance over which work is done.     B) It requires more force than lifting the object directly.     C) It allows a smaller input force over a longer distance.     D) It has no effect on work done.  5. A wheel and axle has a radius of 0.5 meters for the wheel and 0.1 meters for the axle. What is the mechanical advantage?    A) 0.2     B) 2.5     C) 5     D) 10  6. If you push a box up an inclined plane with a length of 10 meters and a height of 2 meters, what is the angle of the incline? (Use sin θ = opposite/hypotenuse)    A) 11.5°     B) 12°     C) 20°     D) 30°  7. What is the work done when a force of 20 N moves an object 5 meters?    A) 25 J     B) 50 J     C) 100 J     D) 200 J  8. A screw has a pitch of 2 cm and you apply a force of 30 N to turn it. What is the ideal mechanical advantage (IMA) of the screw?    A) 1     B) 2     C) 15     D) 30  9. If a first-class lever has a load of 80 N and you apply an effort of 20 N, what is the mechanical advantage?    A) 1     B) 2     C) 4     D) 5  10. In a second-class lever, where is the load positioned?     A) Between the fulcrum and effort      B) At one end of the lever      C) At the center of the lever      D) Above the lever  11. If you use a wedge to split wood and the input force is 60 N, what is the output force if the mechanical advantage is 3?     A) 60 N      B) 120 N      C) 180 N      D) 240 N  12. What is the efficiency of a simple machine if it does 80 J of useful work with an input energy of 100 J?     A) 50%      B) 60%      C) 80%      D) 100%  13. A block slides down a frictionless inclined plane at an angle of 30°. If its weight is 200 N, what is the component of its weight acting down the plane? (Use sin (30°) = 0.5)     A) 100 N      B) 200 N      C) 173 N      D) 87 N  14. Which simple machine would have the highest mechanical advantage if designed correctly?     A) Lever      B) Pulley      C) Inclined plane      D) Screw  15. If you have a compound machine made up of two simple machines with efficiencies of 80% each, what is the overall efficiency?     A) 64%      B) 70%      C) 80%      D) 100%  Don't forget to share our channel! @maths_group11 @maths_group11

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SAT questions about word analogy for grade 12 students. I choose the best answer! 1. HAND : FINGER :: FOOT : ?     A) TOE     B) LEG     C) ANKLE     D) SHOE 2. SUN : SOLAR :: MOON : ?     A) LUNAR     B) NIGHT     C) DARK     D) STAR 3. BIRD : WING :: FISH : ?     A) SCALE     B) FIN     C) WATER     D) GILLS 4. HAPPY : JOYFUL :: SAD : ?     A) ANGRY     B) DEPRESSED     C) TIRED     D) SLEEPY 5. TREE : FOREST ::  FLOWER : ?     A) GARDEN     B) PLANT     C) SEED     D) STEM 6. DOCTOR : PATIENT :: TEACHER : ?     A) CLASSROOM     B) STUDENT     C) BOOK     D) SCHOOL 7. PAINTBRUSH : ART ::  HAMMER : ?     A) WOOD     B) NAIL     C) CARPENTRY     D) HOUSE 8. CLOCK : TIME ::  THERMOMETER : ?     A) HEAT     B) TEMPERATURE     C) WEATHER     D) COLD 9. KEY : LOCK ::  SWITCH : ?     A) LIGHT     B) DOOR     C) ELECTRICITY     D) WALL 10. COLD : ICE ::  HOT : ?     A) FIRE     B) SUN     C) LAVA    D) HEAT 11. WRITER : PEN ::  SCULPTOR : ?     A) CLAY     B) MARBLE     C) CHISEL     D) ART Join and share our channel! @maths_group11 @maths_group11

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