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 cm³, 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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