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Lyrx [107]
3 years ago
12

Sodium and potassium are positively charged ions called cations, and chloride and phosphate form negatively charged ions called

anions.
Select one:
True
False
Physics
1 answer:
Alecsey [184]3 years ago
7 0
 Sodium and potassium are positively charged ions called cations, and chloride and phosphate form negatively charged ions called anions. is true!

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Gravity causes all falling objects to accelerate at a rate of 98 m/s2.<br> O True<br> O False
aleksandrvk [35]
It’s true the acceleration of falling objects on earth due to gravity is 98ms2
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Only one symbol must be included in every circuit diagram. What symbol is it?
qaws [65]

Explanation :

A pictorial representation of a circuit is called as circuit diagram.

The three important components of a circuit are : Power source, wires and load.

Load means a bulb or any other electrical equipment and power source means a battery.

<em>Out of three components, battery must be included in every circuit diagram because it provides voltage and without voltage there is no electric current.</em>

<u><em>The figure shows the symbol of a battery.</em></u>

7 0
4 years ago
Which is a unit of pressure? A. gram B. Kilopascals C. Newtons D. Kilograms
Finger [1]

B. Kilopascals.

A kilopascal equals to 1,000 pascals; and a pascal is equal to a force of 1 newton per square meter.

Meanwhile,

- a gram and a kilogram are both units of measurement for mass, and

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3 years ago
In which item is energy stored in the form of gravitational potential energy
lara31 [8.8K]
Stretched bow string
7 0
3 years ago
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An 80 kg skateboarder moving at 3 m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is
Serga [27]

Answer:

640 J

Explanation:

ΔKE = KE − KE₀

ΔKE = ½ mv² − ½ mv₀²

ΔKE = ½ m (v² − v₀²)

ΔKE = ½ (80 kg) ((5 m/s)² − (3 m/s)²)

ΔKE = 640 J

Her kinetic energy increases by 640 J, so she does 640 J of work.

3 0
3 years ago
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