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Usimov [2.4K]
3 years ago
8

Which is not an element? Water , Arsenic, sodium, Aluminum

Physics
2 answers:
Lilit [14]3 years ago
6 0

Answer: Water

Explanation: water is a molecule and composed of Hydrogen and Oxygen atoms.

MrRa [10]3 years ago
3 0

Answer:

water

Explanation:

water is not an element, it is a molecule

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Please help me!!!.......​
nignag [31]

Answer: its a

Explanation:

6 0
3 years ago
Which choice best characterizes K+ leakage channels? View Available Hint(s)
hoa [83]

Answer:

C. <u>Trans-membrane protein channels that are always open to allow K+ to cross the membrane without the additional input of energy</u>

Explanation:

As we know that K+ leakage channels indicate the Potassium leakage channel. The best characterizes about K+ leakage channels is that there is a Trans-membrane protein channel which is always open to allow K+ to cross the membrane without the additional input of energy.

Actually when a cell dies its membrane potential gets more positive and finally reaches zero .

The key point is that the cells spend energy to maintain the intra-cellular ionic concentrations constant.

The membrane permeability of K+ is much  higher than the membrane permeability of Na+.

Therefore, the correct choice is option (C).

7 0
3 years ago
A science student makes the following statement:
Assoli18 [71]

Answer:

A. Forming a Hypothesis

8 0
3 years ago
Read 2 more answers
Because angular momentum is conserved, an ice-skater who throws her arms out will
ki77a [65]
This is an example of conservation of angular momentum.

The ice skater will rotate more slowly because her arms would be considered the outside torque that is impacting her constant angular momentum.

So, an ice-skater who throws her arms out will rotate more slowly.
8 0
3 years ago
An 82 kg man, at rest, drops from a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching th
ddd [48]

Answer:

1626.4 N

Explanation:

Given that a 82 kg man, at rest, drops from a diving board 3.0 m above the surface of the water and comes to rest 0.55 s after reaching the water. What force does the water exert on him?

The parameters to be considered are:

Distance S = 3m

Time t = 0.55s

Since the man started from rest, initial velocity u = 0

Using second equation of motion

S = Ut + 1/2at^2

3 = 1/2 × a × 0.55^2

3 = 1/2 × a × 0.3025

a = 3/ 0.15125

a = 19.83 m/s^2

Force = mass × acceleration

Force = 82 × 19.83

Force = 1626.4 N

Therefore, the force that water exerted on him is 1626.4 N

4 0
3 years ago
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