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Paladinen [302]

3 years ago

7

Which subatomic particle has a positive charge?

2 answers:

VMariaS [17]3 years ago

6 0

The answer is protons
Electrons have negative charge and neutrons have 0 charge

salantis [7]3 years ago

5 0

Answer:

(C)

Explanation: protons are positive, electrons are not plz say thanks

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Explain why it is important to keep all variables that might affect the dependent variable, other than the manipulated variable

Inga [223]

<span>You have multiple confounding variables, you cannot accurately conclude the relationship between the manipulated and dependent variable because the other variables that are not controlled for could be the reason for seeing a certain change</span>

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3 years ago

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To calculate the density of an object which of the following values do you need to know a. Buoyancy b. Volume c. Weight d. Mass

dem82 [27]

B. volume and d. mass

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3 years ago

What is 18 m/s north an example of?

Mkey [24]

Answer:

It is an example of velocity

Explanation:

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8 0

4 years ago

A bus contains a 1440 kg flywheel (a disk that has a 0.63 m radius) and has a total mass of 10200 kg. Calculate the angular velo

CaHeK987 [17]

Answer: $\omega =93.51 rad/s$

Explanation:

Given

mass of Flywheel $m_1=1440 kg$

mass of bus $m_b=10200 kg$

radius of Flywheel $r=0.63 m$

final speed of bus $v=21 m/s$

Conserving Energy i.e.

0.9(Rotational Energy of Flywheel)= change in Kinetic Energy of bus

Let $\omega$ be the angular velocity of Flywheel

$0.9\cdot \frac{I\omega ^2}{2}=\frac{m_bv^2}{2}$

$I=moment\ of\ Inertia =mr^2=1440\cdot 0.63^2=571.536 kg-m^2$

$0.9\cdot \frac{571.536\cdot \omega ^2}{2}=\frac{10200\cdot 21^2}{2}$

$\omega ^2=21^2\times \frac{10200}{0.9\times 571.536}$

$\omega =21\times 4.45=93.51 rad/s$

8 0

3 years ago

What volume will be occupied by 20g of Copper if the density of Copper is 9.1g/ml?

Eva8 [605]

Answer:

The volume of copper is 2.198 ml

Explanation:

Given;

mass of copper, m = 20 g

density of copper, ρ = 9.1 g/ml

Density is given by;

Density = mass / volume

Volume = mass / density

Volume = (20 g) / (9.1 g/ml)

Volume = 2.198 ml

Therefore, the volume of copper is 2.198 ml

3 0

3 years ago