![subject](/tpl/images/cats/fizika.png)
Suppose you bought a cup of coffee each morning on your way to school. You wish to drink the coffee when you reach your class and have time to settle down which is about 30 minutes from the time of purchase. You like to add cream to your coffee, but you still want the coffee to be as hot as possible after those thirty minutes. Therefore, should you add the cream at the time of purchase or after about 15 minutes?What do you predict? Will the coffee be hotter if you add the cream earlier or if you add it later? What is the reason for your prediction?
![ansver](/tpl/images/cats/User.png)
Answers: 3
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 16:30
3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 21:00
What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 21:10
Aspecified volume of space contains an electric field for which the magnitude is given by e=e0cos(ωt). suppose that e0 = 20 v/m and ω = 1.0 × 107 s−1. part a what is the maximum displacement current through a 0.80 m2 cross-sectional area of this volume? express your answer with the appropriate units. idisp,max i d i s p , m a x = nothing nothing request answer part b how would this area have to be oriented relative to the electric field to get this maximum displacement current?
Answers: 2
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 21:40
Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.
Answers: 1
You know the right answer?
Suppose you bought a cup of coffee each morning on your way to school. You wish to drink the coffee...
Questions
![question](/tpl/images/cats/mat.png)
Mathematics, 22.04.2020 00:22
![question](/tpl/images/cats/mat.png)
Mathematics, 22.04.2020 00:22
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 22.04.2020 00:22
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/health.png)
Medicine, 22.04.2020 00:22
![question](/tpl/images/cats/mat.png)
Mathematics, 22.04.2020 00:22
![question](/tpl/images/cats/istoriya.png)
History, 22.04.2020 00:22
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/health.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/health.png)
Health, 22.04.2020 00:22
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/istoriya.png)
History, 22.04.2020 00:22
![question](/tpl/images/cats/ap.png)
Advanced Placement (AP), 22.04.2020 00:22