# 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: 460

- Evaluate 26

Evaluate square root: √1³+2³+3³+4³= - Mr. Erel

Mr. Erel earns 12% compounded quarterly. He projected to collect Ᵽ500,000 after 10 years. What is the amount he needs to invest? - LCM of polynomials

Find the lcm of 4x³ + 8x² and 5x² -20 - What power 2

What power has a pump output to move 4853 hl of water to a height of 31 m for 8 hours? Comparing the power generated by the pump vs. the power generated by the motor, which is more efficient? Which, the pump or the motor generates the more pollution if fo - Inspect 5

Inspect the sequence and complete the following statement: seq: 1, 4, 9, 16, 25, 36, 49 The first two numbers differ by a. The second and third numbers differ by b. The third and fourth numbers differ by c. The difference between any two successive number - Two pots

Two similar pots have heights of 16 cm and 10 cm if the smaller pot holds 0,75 l. Find the capacity of the larger pot - Isosceles right triangle

If the square of the hypotenuse of an isosceles right triangle is 128 cm^{2}, find the length of each side. - Work space

It is required to be at least 36 square feet of work space for every person in a conference room. A conference room is 28 by 20 ft. find the maximum number of people the room can accommodate. - Unknown 72884

The square root of an unknown number equals the square of 2. What is the unknown number? - World's

World's biggest indoor aquarium. In its enormous tank with the capacity represented by the following polynomial V=4x³+43x²+63x The aquarium is rectangular prism shape. Find the following: 1. If the height of the aquarium is x, then find the area of the ba - Which 10

Which will have greater momentum between a 10 wheeler truck weighing 7,000 kg and a bus that weighs 5,000kg if the bus is moving at 15 m/s while the truck is moving at 10 m/s? - Cross-section 71254

The steel conductors of the long-distance power line have a cross-section of 5 cm². Calculate the resistance of a steel wire with a length of 2 km if the resistivity of the steel is 13 * 10-8 kΩ · m. - Distance 69524

The length of the Odra in Moravia is 42% of its length in Poland. The total length of the flow from the source to the sea is 1165 km. What is the distance in Moravia, and what is the distance in km on the Polish side? - Power during takeoff

The aircraft weighing 3.5 tons will disembark 1 km in 1 minute after takeoff and reach a speed of 290 km/h. Find the average power of its engines during this time. - Determine 69154

Determine the pump power if: I pour 3 m³ of water from the tank in 120 seconds with a hose. The height of the hose mouth above the tank is 1.5 m. The speed of the water from the mouth of the hose is 20 m / s. - Increasing 69094

The aircraft weighing 61 t climbed from a height of 1000 m to a height of 3000 m while increasing the speed from 170 m / s to 210 m / s. What work did the aircraft engines do? - Instantaneous 69064

Describe how the instantaneous power value in the AC circuit changes during one period. - Social beneficiaries

In a certain community, 52% are SAP beneficiaries, 15% are members of 4Ps, and 8% are both SAP and 4 Ps. If a citizen from the community is an SAP, what is the probability that he also is 4Ps? If that person is not a 4Ps, what is the probability that he i - Created 68734

From how many cubes with a 4 cm edge can a cube with a 16 cm edge be created? - Difference 68514

How many times is the difference between the squares of numbers 4 and 2 bigger than the square of their difference (in this order)?

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