Power - math problems

Power is the amount of work done (energy supplied) per unit time. In physics, power is the amount of energy transferred or converted per unit time. In the SI units, the unit of power is the watt, equal to one joule per second. Other units are, for example, 1 hp (one horsepower; 1 hp = 735.5 W) and then derived units such as kW - kilowatt.

Number of problems found: 281

  • Comparing exponents
    powers A) 8 (6²)(8²) b) 16 (6²)(8²) c) (6¹+²) (8²)
  • The sum 13
    prime The sum of the exponents of the prime factors in the prime factorization of 196 is. .. .
  • If x=4
    eq2 If x=4 and y=-3, what is the value of the expression x² + 2xy - 4x + 3y + y²?
  • Height of a cube
    cube_shield What is the volume of a cube if the height is 5cm.
  • Mohammed
    garden Mohammed grew a garden last year. His plot of land was 6 3/4 feet by 10 feet. He wants to have twice as much area and his garden this year how much area will the new garden take up?
  • Fraction unknowns
    fractal Divide of fractions with unknowns: Fraction 1: The quantity x squared plus 6 times x plus 9 over the quantity x minus 1. Fraction 2: the quantity x squared minus 9 over the quantity x squared minus 2 times x plus 1.  Find Fraction 1 over Fraction 2.
  • What power
    radiator What power should the radiator have in a room 5x4 meters with a height of 3 meters? Hint: Calculate 35 watts per meter ^ 3 in case you need 22 degrees in the room but you need about 24 degrees in the bathroom. It's an old heating cheat, but it will defini
  • Evaluate expression
    plusminus Evaluate following expression: 5 to the power of 2 - (4x4) divided by 2 =
  • Mr Duma
    garden Mr Duma recently inherited a rectangular plot, part of the estate left by his late father. The plot with the following dimensions: Length=2x+1;Width=x-1. Determine the formula, in terms of x, that best describes the area of the rectangular plot. He has pl
  • An architect 2
    room An architect is designing a house. He wants the bedroom to have the dimensions of 8 ft by 4 ft by 7 ft. The architect doubles all three dimensions to create the den. Does that mean the den will have double the volume of the bedroom? First, find the volume
  • Two gardens
    garden The flower garden has a square shape. The new garden has the shape of a rectangle, and one dimension is 8 m smaller, and the other is twice as large as in a square garden. What were the original garden dimensions and the new garden if both gardens' area i
  • Future value investment
    exp_growth Poseidon deposited 2,747 golden drachmas in a Mount Olympus college savings account to ensure Percy can go to college. It pays 0.04 (percent in decimal form) annual interest. After 11 years, he withdraws the money. How much more money would he have if the
  • The output
    transformator The output voltage of the transformer is 880 V. The secondary coil has 1200 turns. Find the voltage to which the primary coil is connected and how many turns it has if a current of 1 A flows through it. Transformation ratio k = 4. What current flows throu
  • Free fall
    freefall1 The elevator car weighing 720 kg is torn off at a height of 125 m and begins to fall in a free fall. How much kinetic energy does the elevator car have when it hits the ground floor of the building, when the free fall of the car lasted 5 s?
  • The length 2
    rectangles The length of a rectangle is 12y2 – 15y + 8 and the width is 7y – 11. Find the area of the rectangle
  • Circuit voltage
    resistor Calculate the closed-circuit voltage. Calculate the power on the resistors. R1 = 30 ohms, R2 = 10 ohms. I = 0.1A. U =?. The resistors are connected in series, one after the other.
  • The sum
    eq222 The sum of the squares of two immediately following natural numbers is 1201. Find these numbers.
  • Cube-shaped box
    milk The cube-shaped box is filled to the brim with 2 liters of milk. Calculate the edge and surface of the box.
  • Three cubes
    cubes3 Two cube-shaped boxes with edges a = 70 cm; b = 90 cm must be replaced by one cube-shaped box. What will be its edge?
  • What is 10
    square_axes What is the measure of the square side whose area is (4x2 + 28x+49) square units?

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