Answer:
I think B
Explanation:
Russia is the largest country on the planet, and due to the immense size it could experience more temperature differences.
Answer:
3.49m/s
Explanation:
We have mess of kit = 4kg
Then pieces are 2kg
3m/s due north
5m/s, 30⁰ due south
MiVi = m1v1 + m2v2
We break velocities to have x and y components
MiVi = m1v1(cosθ+sin θ1j) + m2v2(v2cos θ2i+sin2 θj)
θ1 = 90⁰north
θ2 = 30⁰ north east
Vi = 2/4x3m/s(cos90i + sin90j)+2/4x5m/s(cos30i + sin30j)
= 2.16i + 2.75j
Vi = √Vx²+Vy²
Vi = √ (2.16)²+(2.75)²
Vi = 3.49m/s
This is the original speed of the kit
Answer:
True. Massive objects, attract other objects more than those with less mass
Explanation:
We can analyze the formula of the law of universal gravitation proposed by Newton. This formula has the following variables.
![F=G*\frac{m_{1} m_{2} }{r^{2} } \\where\\G = 6.67*10^-11 [\frac{N*m^{2} }{kg^{2} } ]\\m_{1}= mass 1\\ m_{2}= mass 2\\\\r= distance between the bodies.\\](https://tex.z-dn.net/?f=F%3DG%2A%5Cfrac%7Bm_%7B1%7D%20m_%7B2%7D%20%7D%7Br%5E%7B2%7D%20%7D%20%5C%5Cwhere%5C%5CG%20%3D%206.67%2A10%5E-11%20%5B%5Cfrac%7BN%2Am%5E%7B2%7D%20%7D%7Bkg%5E%7B2%7D%20%7D%20%5D%5C%5Cm_%7B1%7D%3D%20mass%201%5C%5C%20m_%7B2%7D%3D%20mass%202%5C%5C%5C%5Cr%3D%20distance%20between%20the%20bodies.%5C%5C)
Let's suppose an asteroid that is passing through the solar system and in some moment the earth is very near to its trajectory.
The mass of the asteroid is m1 = 1000 [kg]
The mass of the earth is m2 = 5,972E24 [kg]
the distance between the asteroid is r = 150000[km]
Therefor the force exerted by the earth over the asteroid is:
[/tex]
Now the force exerted by the sun.
The mass of the asteroid is m1 = 1000 [kg]
The mass of the earth is m2 = 1,98 E 30 [kg]
the distance between the asteroid is r = 149 600 000 [km]
![F=6.67*10^-11*\frac{1000 *1.98*10^{30} }{(150*10^{6} )^{2} } \\\\\\F= 5869600[N]](https://tex.z-dn.net/?f=F%3D6.67%2A10%5E-11%2A%5Cfrac%7B1000%20%2A1.98%2A10%5E%7B30%7D%20%20%7D%7B%28150%2A10%5E%7B6%7D%20%20%29%5E%7B2%7D%20%20%7D%20%5C%5C%5C%5C%5C%5CF%3D%205869600%5BN%5D)
This example shows that at the same distance objects with more mass can exert more force than objects with lesser mass.
Well, the car gets to 5.8*3.3=19.14 m/s, getting to 5.8*3.3*3.3=63.162 meters from the start. For 9.8 secons it goes 187.572 meters, a total of 250.734. So, in 5.056 meters, it stopped uniformly. The speed dropped from 19.14 to 0 in 5.056 meters. There was a formula which didn't use time, but I've forgotten it. It would have given us the deceleration and then one could find the time through a 2nd degree equation. The timing for the first two parts is already known.
Either way, we've calculate more than we need to know for this question. You can cut the answer from that 250.734 distance.
Answer:
B.Law of conservation of energy
Explanation:
In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.
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