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Anna11 [10]
3 years ago
15

Degree day calculations are based on a temperature of?

Physics
1 answer:
Dafna1 [17]3 years ago
5 0

Answer:

65F

Explanation:

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According to the Guinness Book of World Records (1999) the highest rotary speed ever attained was 2010 m/s (4500 mph) The rotati
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Answer:

a. 2.645 * 10^7 m/s^2

b. 2.645 * 10^4 N

Explanation:

Parameters given:

Velocity of rod = 2010m/s

Length of rod = 15.3cm = 0.153m

Mass of object placed at the end of the rod = 1g = 0.001kg

a. Centripetal acceleration is given as:

a = (v*v)/r

Where v = velocity

r = radius of curvature.

The radius of curvature in this case is equal to the length of the rod, since the rod makes the circular path of the motion.

Hence, centripetal acceleration at the end of the rod:

a = (2010*2010)/(0.153)

a = 26432156.86 m/s^2 = 2.64 * 10^7 m/s

b. The force needed to hold the object at the end of the rod is equal to the centripetal force at the end of the rod. Centripetal force is given as:

F = ma = (m*v*v)/r

Where a = centripetal acceleration

F = 0.001 * 2.64 * 10^7

F = 2.64 * 10^4N

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3 years ago
Space satellites in the inner solar system (such as those in orbit around Earth) are often powered by solar panels. Satellites t
erastova [34]

Answer:

D

Explanation:

See attached file

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3 years ago
A freight train leaves the train station 4hrs before a passenger train. The two trains are traveling in the same direction on pa
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It can be said that most of the required information's are already given in the question. 
Let us assume the speed of the passenger train = x
Speed of the freight train = y
x = y + 40
The second equation will be 
6 * x = 10 * y
6x = 10y
Dividing both sides by 2, we get
3x = 5y
x = 5y/3
Putting the value of "x" in the first equation, we get
x = y + 40
5y/3 = y + 40
5y = 3y + 120
5y - 3y = 120
2y = 120
y = 60 mph
Putting the value of y in the first equation, we get
x = y + 40
   = 60 + 40
   = 100 mph
From the above deduction, we can conclude that the passenger train is traveling at 100 mph and the freight train is traveling at 60 mph.
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Sinkholes can form when
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Land surfaces change, erosion happens, the ground collapses, etc.
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3 years ago
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How do helmets protect your head? a. By creating a large area to spread out the pressure of a blow to your head. b. By focusing
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Your answer is A.

I hope this helps
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