The first circle of the Fifth Ring Road in Beijing is 98.58 kilometers.
The Fifth Ring Road (S50) has a total length of 98.58 kilometers, a design speed of 100 km/h, two-way 6-lanes and continuous parking belts, and the approved estimated investment is 13.64 billion yuan. This is the first expressway around the city in Beijing.
Beijing:
35Km from the second ring road, 50Km from the third ring road, 70Km from the fourth ring road, 100Km from the fifth ring road, 200Km from the sixth ring road
Earth:
The average orbital period of the moon is 27 days, 7 hours, 43 minutes, 11.559 seconds, the average revolution speed is 1.023 km/s, the
rotation period is 27 days, 7 hours, 43 minutes and 11.559 seconds per 100 kilometers (synchronous rotation), and the rotation speed is 16.655 m/s (at the equator). ).
Earth's rotation period: one sidereal day (the time it takes to rotate 360° is 23:56:4), the Earth's rotation speed is 465 meters per second, and the revolution period: 1 sidereal year is 365 days, 6:9:10, revolution The average orbital speed is 29.79 kilometers per second. The
earth revolves around the sun at a speed of 29.79 kilometers per second at a speed of 29.79 kilometers per second (actually decelerating at perihelion, accelerating at aphelion) . 1 hour = 3600 seconds, then the earth rotates around the sun at a speed of 107244 kilometers per hour.
When the earth rotates, the speed of any point on the surface of the earth is called "linear speed". That is, the arc length that the point rotates in unit time. The unit is expressed in meters per second. The length of this arc is consistent with the direction of the Earth's latitude. The size of the linear velocity has a great relationship with the geographical latitude and altitude of the measuring point. Generally speaking, the lower the latitude, the greater the linear velocity; the higher the latitude, the lower the linear velocity. The higher the altitude, the greater the linear velocity; on the contrary, the smaller it is. For locations with the same altitude, the highest velocity is at the equator and the lowest at the poles.
The linear velocity of any point on the ground can be calculated by the formula 465cosy m/s (y is the geographic latitude of any point). For example, the linear speed on the equator is: 465cos0°m/s=465m/s, that is, a point on the equator can run more than 40,000 kilometers in 24 hours. Through this formula, the linear velocities of points at latitudes 30°, 60°, and 90° (poles) can be found to be 403 m/s, 233 m/s, and 0 m/s, respectively. The geographic latitude of Beijing is 39°54' north latitude, and the linear velocity is 356.7 m/s. That is to say, even if the residents of Beijing stay put, they are actually moving with the earth faster than the speed of sound.
Energy consumption parameters:
In fitness and diet, two words are often encountered: kilocalorie/calorie (kcal) and kilojoule (kJ), in fact, they are both calorie units. Conversion method: 1 kilocalorie (1 kilocalorie) = 1000 calories 1 calorie = 4.182 joules
1 kilojoule = 242.2480620155 calories
kcal = calorie
kcal = kcal
1 kcal = 1000 cal
1 kJ = 1000 joules
1 kcal 1 kcal 1 calorie = 1000 cal
1 kcal/1 kcal/1 calorie (kcal) = 4.184 kJ ( kJ)
1 card = 4.182 joules
A normal person sits still for a day and needs about 1400+ calories.
The following is the amount of calories consumed by various sports, especially for those who want to lose weight (unit: kcal):
One hour of fitness equipment training: about 400 to 500
Running fast for one hour: about 600-700
walking for one hour: about 500-600
cycling for one hour: about 500-600
for swimming one hour: about 400-500
for one hour elliptical machine: about 500-600 for
basketball one hour: about 600-650
The above is the calorie consumption of several common types of exercise, in addition, such as sitting, bathing, doing housework. . . These seemingly ordinary activities can also burn a lot of calories!
Friends who lose weight remember that for every 3,000 kcal consumed, you lose a pound of meat!
The combustion value of gasoline is 0.46×10^7 joules/kg, so the heat generated by the combustion of one kilogram of gasoline is
1 kg×0.46×10^7 joules/kg=0.46×10^7 joules=460000 joules (J)
Burning one liter of gasoline releases heat 0.73*46000=33580KJ=8022 kcal
1000 watts (W) 1.3596216 metric horsepower (ps) 0.239 kilocalories per second (kcal/s)
1.3410221 imperial horsepower (hp) 737.5621489 foot pounds per second (ft lb/s) 1000 joules per second (J/s)
0.9478171 British thermal unit/second (Btu/s) 101.9716213 kg m/s (kg m/s) 1000 Newton m/s (N m/s)
Human consumption parameters:
Protein: 1.2-2g per kilogram of body weight, a person should consume about 150g of protein, which is equivalent to about 20 eggs (7g/each)
Calories: 10000 kilojoules = 2392 kcal
Moisture: 1500ml
airplane
800-1000 km/h
100km/3 oil (liter)
high speed rail
300 km/h
The high-speed rail at a speed of 350 kilometers per hour has a power of 8,800 kilowatts and consumes 8,800 degrees of electricity per hour.
The power of the high-speed rail at a speed of 300 kilometers per hour is 7542 kilowatts, and the power consumption per hour is 7542 degrees
.
100 kilometers 25.1 kilowatts (degrees)
1.67 per kWh
25*1.7 is approximately equal to 42 blocks
1000 watts (W) 1.3596216 metric horsepower (ps) 0.239 kilocalories per second (kcal/s)
25*1000*3600=90514 kcal
car
100-400 km/h
100km/9-11 oil (liters)
10*8022 kcal = 80220 kcal
Per kilometer (7 (seven dollars per liter)*9)/100=0.63 yuan, 63 yuan per 100 kilometers
The charging electricity fee of public charging piles is 0.87 yuan per kilowatt-hour, and the charging service fee is charged at 0.8 yuan per kilowatt-hour, that is, 1.67 yuan per kilowatt-hour.
Electric vehicle: The test cruising range is 106 kilometers, and the electricity bill is 40.33 yuan per 100 kilometers, and 40.33 yuan can add 7.11 liters of 92 gasoline.
Energy consumption is about the same as high-speed rail 25*1000*3600=90514 kcal
motorcycle
100-400 km/h
100km/3 oil (liter)
Per kilometer (7 (seven dollars per liter)*3)/100=0.21 yuan, 21 yuan per 100 kilometers
bike
10-50 km/h
About 3000 kcal for 100 kilometers
Eat about 50 yuan a day
120g about ten eggs (ten pieces) + 3000ml (6 pieces) + 3000 calories (30 pieces of bread) about 50 pieces
people
6-10 km/h
100 kilometers is about more than 9000 kcal