Answer:
1)true
2)false
3)true
4)true
5)false,cz amatter is made of atoms while light is an electromagnetic radiation.
Answer:
4) Isaac Newton was the first scientist to propose the idea that gravity increases distance between objects decrease
Explanation:
1 - Kepler may have inspired most of Newton's propositions, but there is no record of collaborating on the theory of universal gravitation.
2 - The universal gravitation theory resemble the works of other great scientists, but Newton was indeed the first to propose this idea of gravitation
3 - On the contrary, these scientists have shared concepts, with differences in accuracy that supersede each other to be accepted by the community (i.e: Einstein being at the forefront despite sharing some ideas with Newton)
Answer:
10 degree C
Explanation:
Q = 500 kcal = 500 x 1000 x 4.186 J = 2.1 x 10^6 J
V = 50 liter
m = Volume x density = 50 x 10^3 x 1000 = 50 kg
Let ΔT be the rise in temperature.
Specific heat of water = 4186 J/kg C
Q = m x c x ΔT
2.1 x 10^6 = 50 x 4186 x ΔT
ΔT = 10 degree C
Answer:B
Explanation:
Because chemical energy fuels your body with energy so without it u wont have enough energy to move.
Explanation:
Given that,
Object distance u= -110 cm
Image distance v= 55 cm
We need to calculate the focal length for diverging lens
Using formula of lens
Put the value into the formula
The focal length of the diverging lens is 36.6 cm.
Now given a thin lens with same magnitude of focal length 36.6 cm is replaced.
Here, The object distance is again the same.
We need to calculate the image distance for converging lens
Using formula of lens
Here, focal length is positive for converging lens
The distance of the image is 54.85 cm from converging lens.
Hence, This is the required solution.
