I don’t know the first one but the second one is light and the third one is a satellite
Question 1.
- mass = 4500 kg
- potential energy (p.e) = 67500 J
now, we know :
=》
![p.e = mgh](https://tex.z-dn.net/?f=p.e%20%3D%20%20mgh)
=》
![67500 = 4500 \times 10 \times h](https://tex.z-dn.net/?f=67500%20%3D%204500%20%5Ctimes%2010%20%5Ctimes%20h)
=》
![67500 = 45000 \times h](https://tex.z-dn.net/?f=67500%20%3D%2045000%20%5Ctimes%20h)
=》
![h = \dfrac{67500}{45000}](https://tex.z-dn.net/?f=h%20%3D%20%20%5Cdfrac%7B67500%7D%7B45000%7D%20)
=》
![h = 1.5 \: m](https://tex.z-dn.net/?f=h%20%3D%201.5%20%5C%3A%20m)
note : if we take acceleration due to gravity as 9.8, then height = 1.53 m
Question 2.
- mass = 4500 kg
- kinetic energy = 63000 j
we know,
=》
![k.e = \dfrac{1}{2} mv {}^{2}](https://tex.z-dn.net/?f=k.e%20%3D%20%20%5Cdfrac%7B1%7D%7B2%7D%20mv%20%7B%7D%5E%7B2%7D%20)
=》
![63000 = \dfrac{1}{2} \times 4500 \times {v}^{2}](https://tex.z-dn.net/?f=63000%20%3D%20%20%5Cdfrac%7B1%7D%7B2%7D%20%20%5Ctimes%204500%20%5Ctimes%20%20%7Bv%7D%5E%7B2%7D%20)
=》
![{v}^{2} = \dfrac{63000 \times 2}{4500}](https://tex.z-dn.net/?f=%20%7Bv%7D%5E%7B2%7D%20%20%3D%20%20%5Cdfrac%7B63000%20%5Ctimes%202%7D%7B4500%7D%20)
=》
![{v}^{2} = 28](https://tex.z-dn.net/?f=%20%7Bv%7D%5E%7B2%7D%20%20%3D%2028)
=》
![v = \sqrt{28}](https://tex.z-dn.net/?f=v%20%3D%20%20%5Csqrt%7B28%7D%20)
=》
![v = 2 \sqrt{7} \: \: ms {}^{ - 1}](https://tex.z-dn.net/?f=v%20%3D%202%20%5Csqrt%7B7%7D%20%5C%3A%20%20%5C%3A%20%20ms%20%7B%7D%5E%7B%20-%201%7D%20)
or
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![5.29 \: \: ms {}^{ - 1}](https://tex.z-dn.net/?f=5.29%20%5C%3A%20%20%5C%3A%20ms%20%7B%7D%5E%7B%20-%201%7D%20)
Answer:
about half the people who develop the condition survive.
Explanation:
Cardiogenic shock is a condition in which your heart suddenly can't pump enough blood to meet your body's needs. ... Cardiogenic shock is rare, but it's often fatal if not treated immediately.
Answer:
False is the correct answer.
It is considered more of a chemical change because all of the cells inside the plant decompose (change chemicaly)
<span>A) x = 41t
The classic equation for distance is velocity multiplied by time. And unfortunately, all of your available options have the form of that equation. In fact, the only difference between any of the equations is what looks to be velocity. And in order to solve the problem initially, you need to divide the velocity vector into a vertical velocity vector and a horizontal velocity vector. And the horizontal velocity vector is simply the cosine of the angle multiplied by the total velocity. So
H = 120*cos(70) = 120*0.34202 = 41.04242
So the horizontal velocity is about 41 m/s. Looking at the available options, only "A" even comes close.</span>