Вопрос № 1046096 - Математика
When the boat moves on the surface of the water the resistance force of the environment F is directly proportional to the speed v (
, where 
- coefficient of proportionality). At the moment of the engine shutdown the outboard motorboat is moving at a speed of 224 m/min., and 3 min. later it’s speed is equal to 112 m/min. 9 min. after the engine shutdown the outboard motorboat will be moving at a speed of ______ m/min.
, where - coefficient of proportionality). At the moment of the engine shutdown the outboard motorboat is moving at a speed of 224 m/min., and 3 min. later it’s speed is equal to 112 m/min. 9 min. after the engine shutdown the outboard motorboat will be moving at a speed of ______ m/min.
Вопрос задал(а): Анонимный пользователь, 13 Ноябрь 2020 в 17:57
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 17:57
На вопрос ответил(а): Анастасия Степанова, 13 Ноябрь 2020 в 17:57
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When the boat moves on the surface of the water the resistance force of the environment F is directly proportional to the speed v (
, where 
- coefficient of proportionality). At the moment of the engine shutdown the outboard motorboat is moving at a speed of 224 m/min., and 1 min. later it’s speed is equal to 112 m/min. 4 min. after the engine shutdown the outboard motorboat will be moving at a speed of ______ m/min..
, where - coefficient of proportionality). At the moment of the engine shutdown the outboard motorboat is moving at a speed of 224 m/min., and 1 min. later it’s speed is equal to 112 m/min. 4 min. after the engine shutdown the outboard motorboat will be moving at a speed of ______ m/min..
When the boat moves on the surface of the water the resistance force of the environment F is directly proportional to the speed v (
, where 
- coefficient of proportionality). At the moment of the engine shutdown the outboard motorboat is moving at a speed of 216 m/min., and 1 min. later it’s speed is equal to 108 m/min. 3 min. after the engine shutdown the outboard motorboat will be moving at a speed of ______ m/min.
, where - coefficient of proportionality). At the moment of the engine shutdown the outboard motorboat is moving at a speed of 216 m/min., and 1 min. later it’s speed is equal to 108 m/min. 3 min. after the engine shutdown the outboard motorboat will be moving at a speed of ______ m/min. Другие вопросы по предмету Математика
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It is known that at the moment t=0 the temperature of the body was T0. Let us place it into the environment with the temperature θ and believe that at any moment of the time the body is equally warmed by volume, the temperature of the environment is constant. The rate of change of the body temperature is proportional to the desired conditions with the proportionality coefficient k>0.
Determine the correspondence between the mathematical model, describing the action of heating (T0<θ) or cooling (T0>θ) of the body, correlation of temperatures and the kind of dependence:
1. T0 <θ, the rate of change of the body temperature is proportional to the difference of the current body temperature T(t) and the environment temperature θ;
2. T0 <θ, the rate of change of the body temperature is proportional to the difference of the initial body temperature and the environment temperature;
3. T0 >θ, the rate of change of the body temperature is proportional to the difference of the current body temperature and the environment temperature;
4. T0 >θ, the rate of change of the body temperature is proportional to the difference of the initial body temperature and the environment temperature.
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Determine the correspondence between the mathematical model, describing the action of heating (T0<θ) or cooling (T0>θ) of the body, correlation of temperatures and the kind of dependence:
1. T0 <θ, the rate of change of the body temperature is proportional to the difference of the current body temperature T(t) and the environment temperature θ;
2. T0 <θ, the rate of change of the body temperature is proportional to the difference of the initial body temperature and the environment temperature;
3. T0 >θ, the rate of change of the body temperature is proportional to the difference of the current body temperature and the environment temperature;
4. T0 >θ, the rate of change of the body temperature is proportional to the difference of the initial body temperature and the environment temperature.
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