![subject](/tpl/images/cats/fizika.png)
Physics, 11.07.2021 19:00 ewalker1917
A police car travels towards a stationary observer at a speed of 15m/s. the siren on the car emits a sound of frequency 250Hz. Calculate the observer frequency. the speed of sound is 340m/s
![ansver](/tpl/images/cats/User.png)
Answers: 2
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 19:00
When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 00:30
Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 12:10
Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 14:40
The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.
Answers: 1
You know the right answer?
A police car travels towards a stationary observer at a speed of 15m/s. the siren on the car emits a...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.02.2021 22:50
![question](/tpl/images/cats/en.png)
English, 22.02.2021 22:50
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 22.02.2021 22:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 22.02.2021 22:50
![question](/tpl/images/cats/mat.png)
Mathematics, 22.02.2021 22:50
![question](/tpl/images/cats/istoriya.png)
History, 22.02.2021 22:50
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.02.2021 22:50