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3 years ago

A group of elements are highly inactive and are used by chemists because of their chemical stability.

1 answer:

7 0

Those are the noble gases. I think they were called "noble" because
they behave like kings and other "noblemen" ... stuck up, and not
mixing with ordinary people.

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A drag racing vehicle travels from zero to a hundred miles per hour and 5 seconds north what is acceleration

avanturin [10]

Acceleration(a) is the change in velocity(Δv) over the change in time(Δt). so just divide your velocity and time.

6 0

2 years ago

Toy car in a science experiment covers 1.6 meters in half a second. If a the car travels at a steady speed, how far will it go i

Tanzania [10]

The answer is D. 32 m.

The simple equation that connects speed (v), time (t), and distance (d) can be expressed as:
$v= \frac{d}{t}$ ⇒ $d=v*t$

It is given:
$v = \frac{1.6m}{0.5s} = \frac{1.6m*2}{0.5s*2}= \frac{3.2m}{1s} = 3.2 m/s$
t = 10 s
d = ?

So:
$d= v*t=3.2m/s*10s = 32m$

3 0

2 years ago

The work done to compress a spring with a force constant of 290.0 N/m a total of 12.3 mm is: a) 3.57 J b) 1.78 J c) 0.0219 J d)

iren2701 [21]

Answer:

Work done, W = 0.0219 J

Explanation:

Given that,

Force constant of the spring, k = 290 N/m

Compression in the spring, x = 12.3 mm = 0.0123 m

We need to find the work done to compress a spring. The work done in this way is given by :

$W=\dfrac{1}{2}kx^2$

$W=\dfrac{1}{2}\times 290\times (0.0123)^2$

W = 0.0219 J

So, the work done by the spring is 0.0219 joules. Hence, this is the required solution.

7 0

3 years ago

1. As you get ready for bed, you roll up one of your socks into a tight ball and toss it into the laundry

yKpoI14uk [10]

Answer:

When you toss a rolled up sock across the room, it travels faster as it becomes round and has more weight added on it and this causes the sock to travel in the direction you wish and this gives you a high chance of the sock going straight into the laundry basket, no matter how far away you are.

On the other hand, throwing a sock without rolling it up will cause the sock to just flat down as you throw it. It will travel at a low speed because it has no weight on it since it is flat, and if you try to throw it, it will atleast land 21 cm away from you. About a 0% chance of it getting in the basket.

Hope this helped! =>

3 0

3 years ago

What kind of object are the light rays interacting with in the model below?

Ymorist [56]

Answer:

Concave lens

.............

5 0

2 years ago