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Free_Kalibri [48]
3 years ago
7

Molecules cool a cloud and are usually located on the edges of the cloud. T/F

Physics
1 answer:
allochka39001 [22]3 years ago
4 0
I think true but not sure about it
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Which of the following astronomers was the first to propose elliptical orbits for the planets in our solar system?A.Brahe.Kepler
Anastasy [175]
B. Kepler, he made the laws for planetary motion 
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4 years ago
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Anger is to angry as fire is to what
finlep [7]
<span>Anger is to angry as fire is to blazing. </span>
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3 years ago
Math Practice: Cart A loaded with blocks (600g) moving left at 0.7m/s hits stationary cart B (200g).
Vika [28.1K]

Answer:

The velocity of cart B after the collision is 1.29 m/s.

Explanation:

We can find the velocity of cart B by conservation of linear momentum:

p_{i} = p_{f}

m_{A}v_{A_{i}} + m_{B}v_{B_{i}} = m_{A}v_{A_{f}} + m_{B}v_{B_{f}}

Where:

m_{A} is the mass of cart A = 600 g = 0.6 kg            

m_{B} is the mass of cart B = 200 g = 0.2 kg

v_{A_{i}} is the inital velocity of cart A = 0.7 m/s

v_{A_{f}} is the final velocity of cart A = 0.27 m/s

v_{B_{i}} is the initial velocity of cart B = 0

v_{B_{f}} is the final velocity of cart B =?

Taking the left direction as the positive horizontal direction:

0.6 kg*0.7 m/s + 0 = 0.6 kg*0.27 m/s + 0.2 kg*v_{B_{f}}

v_{B_{f}} = 1.29 m/s

                       

Therefore, the velocity of cart B after the collision is 1.29 m/s.

I hope it helps you!  

5 0
3 years ago
An old streetcar rounds a flat corner of radius 6.80 m, at 18.0 km/h. What angle with the vertical will be made by the loosely h
natka813 [3]

Answer:

\alpha =20.564^{o}

Explanation:

Given data

Radius R=6.80 m

Velocity v=18 km/h =5 m/s

First we need to set up for Force in vertical (y) and horizontal (x)

∑Fy=0=TCosα-W

∑Fx=ma=Fc=TSinα

Solve Vertical force equation for T,substituting mg for W

TCos\alpha -W=0\\TCos\alpha=W\\TCos\alpha=mg\\T=(mg/Cos\alpha)

Substitute expression for Fc and T into horizontal force and simplify it we get

Fc=TSin\alpha\\ where\\Fc=(mv^{2}/R )\\So\\(mv^{2}/R )=(mg/Cos\alpha )Sin\alpha\\(mv^{2}/R )=mg*tan\alpha\\  tan\alpha =\frac{v^{2} }{Rg}\\ \alpha =tan^{-1}(\frac{(5m/s)^{2} }{(6.80m)(9,8m/s^{2} )} )\\ \alpha =20.564^{o}

 

5 0
3 years ago
A car travels at a constant speed of 30km/h for .80h what is the total distance
Simora [160]

Answer:

2400 km

Explanation:

30km for 1hr

Need up to 80 hrs , multiply both 80 and 30

So its 2400km

4 0
3 years ago
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