The earth is cooled and its atmosphere is heated by terrestrial radiation.
Answer:
(a) x = 0.25 m
(b) v = 1.46 m/s
(c) v = 2.4 m/s
Explanation:
mass (m) = 10.3 kg
force from thrust (F) = 240 N
spring constant (k) = 400 N/m
stretch distance from thrust (y) = 30 cm = 0.3 m
acceleration due to gravity (g) = 9.8 m/s^{2}
(A) from mg = kx
compression (x) = mg/ k
x = 
x = 0.25 m
(B) from the conservation of forces
(Fy) + (0.5k
) = (0.5k
) + mgh + (0.5m
)
v = ![\sqrt{[tex]\frac{(Fy) + (0.5k[tex]x^{2}](https://tex.z-dn.net/?f=%5Csqrt%7B%5Btex%5D%5Cfrac%7B%28Fy%29%20%2B%20%280.5k%5Btex%5Dx%5E%7B2%7D)
) - (0.5k) - mgh }{0.5m}[/tex]}[/tex]
v = ![\sqrt{[tex]\frac{(240 x 0.3) + (0.5 x 400 x [tex]0.25^{2}](https://tex.z-dn.net/?f=%5Csqrt%7B%5Btex%5D%5Cfrac%7B%28240%20x%200.3%29%20%2B%20%280.5%20x%20400%20x%20%5Btex%5D0.25%5E%7B2%7D)
) - (0.5 x 400 x 
) - (10.3 x 9.8 x (0.25 + 0.3)) }{0.5 x 10.3}[/tex]}[/tex]
v = 1.46 m/s
(C) if the rocket weren't attached to the spring, the conservation of energy equation becomes
(Fy) + (0.5k) = mgh + (0.5m)
v = ) - mgh }{0.5m}[/tex]}[/tex]
v = ) - (10.3 x 9.8 x (0.25 + 0.3)) }{0.5 x 10.3}[/tex]}[/tex]
v = 2.4 m/s
Explanation:
An element contains just one type of atom. A compound contains two or more different atoms joined together. A mixture contains two or more different substances that are only physically joined together, not chemically. A mixture can contain both elements and compounds.
Answer: 20.4 m
Explanation: speed v upward is v = vo -gt.
When maximum height v = 0, vo -gt = 0 and
T = vo / g = 20 m/s / 9.81 m/s² = 2.04 s
Now height y = vot -0.5 gt^2 = 20,4 m
This is possible to solve using
Conservation of energy Ek= Ep
0.5mv² = mgh. And h = v²/2g. Results same
Speed of light is an example of a light medium wave.
Most famous Michelson-Morley (1887) demonstrated that light travels at the same speed regardless of whether it was measured in the direction of the Earth's motion or at right angles to it. When the light travels through a vacuum: It moves from medium to medium (example: air to glass) speed can change depending of the new medium's index of refraction and the "bending" of light is essentially how lenses work.
