# Themes, topics - practice problems - page 2 of 110

#### Number of problems found: 2198

- Increases 69454

The car weighs 1850 kg and increases its speed from 27 to 81 km / h. How much has its kinetic energy increased? - 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. - Kilometers 69264

Laura went for a new bike ride. In an hour, her father followed her on the same route at a speed of 60 km / h and overtook her in 1/2 hour. a) Find in kilometers the length of Laura's route before her father caught up with her. b) Determine in kilometers - 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? - A train

A train can travel 1136 miles in 4 hours. What is the unit rate that this train is traveling per hour? Write in miles per hour. - Fertilizer 68694

0.6 l of fertilizer goes to 40 l of water. How much fertilizer should be put per 10 liters of water? - A fan

A fan with a resistance of 20 Ω is connected to a power supply. The current flowing through the circuit is 2.5 A. What is the voltage of the power supply? - Container 67524

What is the weight of a package of 12-liter milk cartons, one milk container weighs 80g? - Transfers 67414

At the height of 80 cm above the road, a person transfers a stone weighing 2 kg parallel to it in a uniform motion along a path of 6 m in 10 s. With what power does it work? - Average 67404

The stork moves to Africa for the winter for an average of 10 hours a day and flies around 650 km. At what average speed does the stork move? - Calculate 66974

Calculate the density of the wood from which the statuette is made. Its volume is 32000 cm^{3}, and it weighs 20800 g? - Cross-section and coulombs

Determine the current flowing through the conductor if a charge of 150 C has passed through its cross-section in one minute. - Conductor 66234

For how long does a charge of 600 C pass through the conductor at a current of 1 A.? - Resistance 66074

Determine the current flowing through the car's starter, whose resistance is 60 milliohms at 12V - Resistances 66064

Two resistors with resistances of 40 ohms and 60 ohms are connected in series and connected to a voltage of 150V. A) the total resistance B) current in the circuit C) voltage on both resistors - Resistance 66054

The handset has a resistance of 4000 ohms. Calculate what voltage is connected to them if the current passes 2.5mA. - Displayed 65694

Calculate the scale of the map, at which the actual distance of 12.6 km will be displayed as a distance of 2.52 cm. - An aircraft 2

An aircraft jet engine has a thrust of 80 kN. What impulse is produced in 30 s? - Children's 64844

An architect has two plans for the same apartment at different scales. On the first plan, with a scale of 1:20, the length of the children's room is 20 cm. What is the size of the children's room on the second plan with a scale of 1:50?

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