Marie:
She discovered Polonium and Radium, she was the first woman to receive a Nobel prize, and she made the first portable radio during the first World War.
Curie:
Said to be one of the founders of modern physics and formulated the Curie's law stating that M= C*B/T.
30 km/h * 17 h = 30*17 km/h *h
= 510 km
Answer:
The original volume of the first bar is half of the original volume of the second bar.
Explanation:
The coefficient of cubic expansivity of substances is given by;
γ = ΔV ÷ (
Δθ)
Given: two metal bars with equal change in volume, equal change in temperature.
Let the volume of the first metal bar be represented by
, and that of the second by
.
Since they have equal change in volume,
Δ
= Δ
= ΔV
For the first metal bar,
2γ = ΔV ÷ (
Δθ)
⇒ Δθ = ΔV ÷ (2γ
)
For the second metal bar,
γ = ΔV ÷ (
Δθ)
⇒ Δθ = ΔV ÷ (
γ)
Since they have equal change in temperature,
Δθ of first bar = Δθ of the second bar
ΔV ÷ (2γ
) = ΔV ÷ (
γ)
So that;
(1 ÷ 2
) = (1 ÷
)
2
= ![V_{2}](https://tex.z-dn.net/?f=V_%7B2%7D)
= ![\frac{V_{2} }{2}](https://tex.z-dn.net/?f=%5Cfrac%7BV_%7B2%7D%20%7D%7B2%7D)
Thus, original volume of the first bar is half of the original volume of the second bar.
The answer will be
(1) correct
(2) correct
(3) the force of the soccer ball on the net
(4) Will not change
Hope this help