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3 years ago

2NaOH + H2SO4 → Na2SO4 + H2O

Physics

2 answers:

irakobra [83]3 years ago

7 0

Its actually oxygen instead of sodium, you got the rest right
Not Balanced - Oxygen - Not Equal

mina [271]3 years ago

6 0

The equation is unbalanced because the number of hydrogen atoms and sodium atoms is not equal in the reactants and the products

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Which force keeps an object moving in a circle? centripetal force fluid friction inertia momentum

Virty [35]

Answer:

Any object moving in a circle (or along a circular path) experiences a centripetal force. That is, there is some physical force pushing or pulling the object towards the center of the circle. This is the centripetal force requirement.

Explanation:

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3 years ago

The waves that heat a cup of water in the microwave are an example of electromagnetic waves. True or False

Oksana_A [137]

That's true.

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2 years ago

Ian pushed a piano across the room with the correct amount of force. Which of newton’s laws is this?

Black_prince [1.1K]

Answer:

1st and 2nd

Explanation:

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2 years ago

A wheel of radius 25cm has eight spokes. It is mounted on a fixed axle and is rotating at a constant angular speed w. You shoot

spayn [35]

Explanation:

We will assume that the rim of the wheel is also very thin, like the spokes. The distance s between the spokes along the rim is

$s = \frac{1}{8}C = \frac{1}{8}(2\pi)(0.25\:\text{m}) = 0.196\:\text{m}$

The 20-cm arrow, traveling at 6 m/s, will travel its length in

$t = \dfrac{0.2\:\text{m}}{6\:\text{m/s}} = \dfrac{1}{30}\:\text{s}$

The fastest speed that the wheel can spin without clipping the arrow is

$v = \dfrac{s}{t} = \dfrac{0.196\:\text{m}}{\left(\dfrac{1}{30\:\text{s}}\right)} = 5.9\:\text{m/s}$

The angular velocity $\omega$ of the wheel is given by

$\omega = \dfrac{v}{r} = \dfrac{5.9\:\text{m/s}}{0.25\:\text{m}} = 23.6\:\text{rad/s}$

In terms of rev/s, we can convert the answer above as follows:

$23.6\:\dfrac{\text{rad}}{\text{s}}×\dfrac{1\:\text{rev}}{2\pi\:\text{rad}} = 3.8\:\text{rev/s}$

As you probably noticed, I did the calculations based on the assumption that I'm aiming for the edge of the wheel because this is the part of the wheel where a point travels a longer linear distance compared to ones closer to the axle, thus giving the arrow a better chance to pass through the wheel without getting clipped by the spokes. If you aim closer to the axle, then the wheel needs to spin slower to allow the arrow to get through without hitting the spokes.

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2 years ago

Find the speed of an object that covers 400 km in 5 hr.

Shalnov [3]

The speed of an object that travels 400 km in 5 hours, would be calculated simply by taking the distance of 400 and dividing it by the number of hours 5.

400 km/5 hours = 80km/hr.

The speed is 80 km/hr.

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3 years ago