Power = Energy / time, The time is the one it takes to cover 25 km at 65 km/h, so: time = 25/65*60*60 = 1384.6 seconds.
Now the total energy needed for that is: Energy = Power * time = 15,000 * 1384.6 = 20769239.8 J.
The heat provides those J. The heat for a difference in temperature is:
Heat = mass * c_h * Difference_of_temperature,
Heat = 350 * 9,800 * (T-15)*0.88,
where the 0.88 is because some of the heat is lost, efficiency 88%. Now, you can equal both results and get T:
350*9,800*0.88*(T-15) = 20769239.8
T-15 = 6.88, and T = 21.88 C
The answer is T= 21.88 C
NB: this specific heat, 9,800, is more than 2,000 time sthat of water, it is really a substance that does not exist,. It seems He has the highest (5,300) but it's a gas!
Answer: I would say B. Dairy
Explanation: Apple is in the fruit group. Grilled chicken breast is in the protein group. Whole white rice is in the whole grains group and string beans are in the vegetable group.
k= - f/x this is the formula for spring constants
The graph between the strength of the magnet(number of paper clips picked) and battery is approximately a straight line.
For 25 coil, with increase of 1.5 V battery voltage, the electromagnet picks about 5 more clips. So, for a 7.5 V battery, it would pick about 30 paper clips.
For 50 coil, with increase of 1.5 V battery voltage, the electromagnet picks about 15 more clips. So, for a 7.5 V battery, it would pick about 30 paper clips.
Answer:
This happens in two ways. If an object is at rest and an unbalanced force pushes or pulls the object, it will move. Unbalanced forces can also change the speed or direction of an object that is already in motion.
Explanation:
