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djyliett [7]
3 years ago
9

Which of the following has the longest life a dwarf star a giant star a supernova or the sun.

Chemistry
1 answer:
OlgaM077 [116]3 years ago
7 0
A dwarf star has the longest life.
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Though alchemists were often superstitious, they left a rich legacy for modern chemists. What was their main contribution?
topjm [15]

though alchemists were often superstitious, they left a rich legacy of modern chemists. what was their main contribution-

Explanation:

they were the first to preform experiments.

5 0
3 years ago
The term Reuther Ford gave to the positively charged particles in the nucleus of an antom was
lubasha [3.4K]
The term Rutherford gave to the positively charged particles in the nucleus of an atom was/is Proton. 

Hope this helps!
4 0
3 years ago
A basketball player jumps straight up to dunk a basketball. The basketball player's speed increases as she returns to the
katen-ka-za [31]

Options :

The upward force is greater than the downward force.

The downward force is greater than the upward force.

The rightward force is greater than the leftward force.

The leftward force is greater than the rightward force.

Answer:

The downward force is greater than the upward force.

Explanation:

When the player jumps to dunk a basket ball, it requires an upward force exerted on the person due to the push by the person to jump, after dunking the basket ball, the player attains maximum height, where his final velocity becomes zero and his direction changes (from upward to downward), at this point his velocity increases due to the additional force exerted on the player due to the Earth's Gravitational pull - which is a downward force which acts on an object).

Hence, it could be concluded that the increase in speed of the basketball player as she returns to the ground means that the downward force is greater than the upward force acting on the player.

7 0
2 years ago
The work function is the energy that must be supplied to cause the release of an electron from a photoelectric material. The cor
vladimir2022 [97]

Answer:

No photoelectric effect is observed for Mercury.

Explanation:

From E= hf

h= Plank's constant

f= frequency of incident light

Threshold Frequency of mercury= 435×10^3/ 6.6×10^-34 × 6.02×10^23

f= 11×10^14 Hz

The highest frequency of visible light is 7.5×10^14. This is clearly less than the threshold frequency of mercury hence no electron is emitted from the mercury surface

3 0
3 years ago
What element has 25 electrons transition element
kolbaska11 [484]
Manganese has 25 electrons and is a transition element
8 0
2 years ago
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