Answer:
0.325 N
Explanation:
From the question,
T = 4π²rm/t²............................ Equation 1
Where T = Tension, r = radius or length of the string, m = mass of the string, t = time.
Given: r = 2.4 m, m = 15 g = 0.015 kg, t = 2.09 s.
Constant: π = 3.14
Substitute these values into equation 1
T = 4(3.14²)(2.4)(0.015)/2.09²
T = 1.4198/4.3681
T = 0.325 N
Answer:
The change in length is 0.01056 m.
Explanation:
Given that,
Length = 11 m
Temperature = 20°C
Pressure = 1 atm
Boiling temperature = 100°C
We need to calculate the length
Using formula of change in linear expansion


Put the value into the formula



Hence, The change in length is 0.01056 m.
Relax. You're not completely lost.
The car has to cover 600 km. That's 600,000 meters.
If it could only move at 1 meter per second, it would take the car 600,000 seconds to cover the distance. (almost a week !)
But it can move faster than that. In fact, it can cover 80 meters every second.
How many times does it need to do 80 meters, in order to cover the whole 600,000 ? That's how many seconds it'll take.
That's division.
Answer:
0.39AU = 58344000 [km] or 58.500.000 [km]
Explanation:
This is a problem that consists simply in converting units:
AU = astronomic unit
![1 [AU] = 1.496*10^{8} [km]\\0.39 [AU] = x\\\\Therefore\\x = \frac{0.39*1.496*10^{8} }{1} \\x = 58344000[km]](https://tex.z-dn.net/?f=1%20%5BAU%5D%20%3D%201.496%2A10%5E%7B8%7D%20%5Bkm%5D%5C%5C0.39%20%5BAU%5D%20%3D%20x%5C%5C%5C%5CTherefore%5C%5Cx%20%3D%20%5Cfrac%7B0.39%2A1.496%2A10%5E%7B8%7D%20%7D%7B1%7D%20%5C%5Cx%20%3D%2058344000%5Bkm%5D)
Answer:
Chemical reactions occur slower at lower temperatures and faster at higher temperatures. When you put a glow stick in cold water, the chemical reaction slows down but will last for a longer period of time. When you put a glow stick in hot water, the reaction speeds up but will be over quicker.
Explanation:
(self-explanatory)
I hope this helps, have a nice day.