# Power - practice 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: 294

- Sphere volume formula

If V=4/3 π r^{3}, find, the value of V when r = 7, the value of r when V=113 1/7 - Evaluate statement

Which is a correct statement about the description “two less than the quotient of a number cubed and sixteen, increased by eight” when n = 4? Choices: The value when n = 4 is 6. The value when n = 4 is 7. The value when n = 4 is 9. The value when n = 4 is - Jointly and cube power

If y varies jointly as x and the cube of z and y=16 when x=4 and z=2, find an equation that represent this relationship - The power generator

How much would be paid for the generator if it costs 2000 and 12.5% tax is charged on it? - Square function

If z varies jointly as x and the square of y, and z = 20 when x = 4 and y = 2, find z when x = 2 and y = 4. - Seventh term

The first term of a geometric sequence is 9 and the third term is 1296. Find the seventh term. - Two expressions

When x = 3 and y = 5, by how much does the value of 3x² – 2y exceed the value of 2x² – 3y? - Power consumption

The price of electricity is ₱6.50 per kilowatt hour (kWh). If a television with 120 W power consumption ran from 7:30 AM to 12:30 PM, how much electricity was consumed? - Sqrt between ints

Which two consecutive integers does the square root lie? * √45 √23 √71 √7 √86 - Given 2

Given g(x)=x^{2}+x+1 where x=t². What is g(t²)? - Perfect cube

Which of the following number is not a perfect cube? a. 64 b. 729 c. 800 d. 1331 - Comparing exponents

A) 8 (6²)(8²) b) 16 (6²)(8²) c) (6¹+²) (8²) - The sum 13

The sum of the exponents of the prime factors in the prime factorization of 196 is. .. . - If x=4

If x=4 and y=-3, what is the value of the expression x² + 2xy - 4x + 3y + y²? - Height of a cube

What is the volume of a cube if the height is 5cm. - Mohammed

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

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

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

Evaluate following expression: 5 to the power of 2 - (4x4) divided by 2 = - Mr Duma

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

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