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4 years ago

What explains the negative charge on the oxygen atom within the water molecule?

2 answers:

5 0

To form an ion and bond with hydrogen, the oxygen atom gains electrons. Electrons are negative, therefore the oxygen within the water molecule will be negative.

Debora [2.8K]4 years ago

5 0

Kp7 is correct o belive

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Which alkali metal is most reactive

Doss [256]

Francium is the most reactive alkali metal

8 0

3 years ago

A hawk flies in a horizontal arc of radius 12.0 m at constant speed 4.00 m/s. (a) Find its centripetal acceleration. (b) It cont

olya-2409 [2.1K]

Answer:

a) $a_c= 1.33 m/s^2$

b) a= 1.79 m/s²

θ = 41.98⁰

Explanation:

arc radius = 12 m

constant speed = 4.00 m/s

(a) centripetal acceleration

$a_c=\frac{v^2}{R}$

$a_c=\frac{4^2}{12}$

= 1.33 m/s²

(b) now we have given

$a_t= \ 1.20 m/s^2$

now,

$a=\sqrt{a^2_c+ a^2_t}$

$a=\sqrt{1.33^2+ 1.20^2}$

a= 1.79 m/s²

direction

$\theta = tan^{-1}(\frac{a_t}{a_r} )$

$\theta = tan^{-1}(\frac{1.2}{1.33} )$

θ = 41.98⁰

5 0

3 years ago

I notice the wheels on my bicycle spin in a circular motion as I am pedaling. I know that the

kherson [118]

Answer:

Acceleration, a = 750m/s²

Explanation:

Given the following data;

Radius, r = 0.31m

Velocity, v = 15m/s

To find the centripetal acceleration;

$Acceleration, a = \frac {v^{2}}{r}$

Substituting into the equation, we have;

$Acceleration, a = \frac {15^{2}}{0.31}$

$Acceleration, a = \frac {225}{0.31}$

Acceleration, a = 750m/s²

Therefore, the centripetal acceleration of the bike wheel is 750m/s².

6 0

3 years ago

Which of the following statements best support the claim that human actions decreased the whooping crane population? (1

Anna35 [415]

Answer:

Explanation:

A is incorrect because it would actually increase the population...

B is incorrect because other birds do not matter, it is only whooping cranes...

C is incorrect because it would also increase the population.

8 0

3 years ago

What is an example of a invertebrate that doesn’t have an exoskeleton?

Tatiana [17]

Invertebrate means those organism which doesnot have backbone in their body .Some of the examples are:

1.Spider

2.earthworm

3.Starfish

4.Sea urchins.

hope this will help u a lot....

5 0

3 years ago

Read 2 more answers