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mestny [16]
3 years ago
8

When an oxygen atom forms an ion, it gains two electrons. What is the electrical charge of the oxygen ion?

Physics
2 answers:
laila [671]3 years ago
4 0
The answer is B. negative 2


lidiya [134]3 years ago
4 0
Electrons have a negative charge thus adding two electrons to an atom will give it a charge of 2 times -1 or -2.

i think its -2
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In which situation is the speed of the car constant while its velocity is changing?
Sati [7]

Answer:

B, the car travels around a circular track at 30 m.

Explanation:

7 0
2 years ago
If Galileo drops a cannon ball from the 60 meter high) Leaning Tower of Pisa, how fast will it be moving when it hits the ground
viva [34]

Answer:

When the ball hits the ground, the velocity will be -34 m/s.

Explanation:

The height and velocity of the ball at any time can be calculated using the following equations:

y = y0 + v0 · t + 1/2 · g · t²

v = v0 + g · t

Where:

y = height of the ball at time "t".

y0 = initial height.

v0 = initial velocity.

t = time.

g = acceleration due to gravity. (-9.8 m/s² considering the upward direction as positive).

v = velocity at time "t".

If we place the origin of the frame of reference on the ground, when the ball hits the ground its height will be 0. Then using the equation of height, we can calculate the time it takes the ball to reach the ground:

y = y0 + v0 · t + 1/2 · g · t²

0 = 60 m + 0 m/s · t - 1/2 · 9.8 m/s² · t²

0 = 60 m - 4.9 m/s² · t²

-60 m / -4.9 m/s² = t²

t = 3.5 s

Now, with this time, we can calculate the velocity of the ball when it reaches the ground:

v = v0 + g · t

v = 0 m/s - 9.8 m/s² · 3.5 s

v = -34 m/s

When the ball hits the ground, the velocity will be -34 m/s.

5 0
4 years ago
A beaker contain 200mL of water<br> What is its volume in cm3 and m3
Bogdan [553]
The volumes are 200cm3 and 0.0002m3
7 0
4 years ago
Read 2 more answers
Does heavy force work under conditions of weightlessness in such an artificial earth satellite?
Afina-wow [57]

Answer: That is to say, a satellite is an object upon which the only force is gravity. Once launched into orbit, the only force governing the motion of a satellite is the force of gravity. Newton was the first to theorize that a projectile launched with sufficient speed would actually orbit the earth.

Explanation: Because Earth-orbiting objects follow elliptical paths around Earth and not a straight line, forces cannot, by definition, be balanced. Force is directional. It is a push or a pull in a particular direction.

3 0
3 years ago
A solid cylinder with a radius of 10 cm and a mass of 3.0 kg is rotating about its center with anangular speed of 3.5 rad/s. Wha
Lynna [10]

Answer:

kE=0.0735 J

Explanation:

Given that

Radius ,R=10 cm = 0.1 m

Mass ,m= 3 kg

Angular speed ,ω = 3.5 rad/s

We know that moment of inertia for solid sphere given as

I=\dfrac{2}{5}mR^2

Kinetic energy

KE=\dfrac{1}{2}I\omega^2

Now by putting the values

KE=\dfrac{1}{2}\times \dfrac{2}{5}mR^2\times \omega^2

KE=\dfrac{1}{2}\times \dfrac{2}{5}\times 3\times 0.1^2\times 3.5^2\ J

kE=0.0735 J

Therefore the kinetic energy will be 0.0735 J

3 0
3 years ago
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