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4 years ago

12

What are two things a scientist can do to cause some substances that are mixed together to react?

1 answer:

NISA [10]4 years ago

8 0

Can be heated
can be pressurized(compressed)
add catalyst

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Which is capeble of housing astronaughts while they conduct reasearch

dusya [7]

Answer:

2

Explanation:

2

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a golf club is swung and strikes a golf ball with a force of 12.2 N. The golf ball accelerates at 265.2 m/s2. Calculate the mass

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Answer:

$0.046\ kg$

Explanation:

$We\ are\ given\ that,\\Acceleration\ produced\ on\ the\ golf\ ball\ due\ to\ Force\ exerted=265.2\ m/s^2\\Magnitude\ of\ the\ Force\ exerted\ over\ the\ Golf-Ball=12.2\ N\\We\ know\ that,\\'The\ force\ acting\ on\ an\ object\ is\ equivalent\ to\ the\ product\ of\ it's\ mass\\ and\ the\ acceleration\ produced'.\\Or,\\F=ma\\Let\ the\ mass\ of\ the\ golf\ ball\ be\ m,\\Hence,\\12.2=265.2\ m\\m=\frac{12.2}{265.2}=0.046\ kg$

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4 years ago

The ratio of Na to O is 2:1. What is the chemical formula for this ionic compound? NaO NaO2 Na2O Na2O2

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A bicycle has wheels of 0.70 m diameter. The bicyclist accelerates from rest with constant acceleration to 22 km/h in 10.8 s. Wh

Anna11 [10]

Answer:

$\alpha=0.16\frac{rad}{s^2}$

Explanation:

Angular acceleration is defined as the variation of angular speed with respect to time:

$\alpha=\frac{\omega}{t}$

The relation between the angular speed and the linear speed is given by:

$\omega=\frac{v}{r}$

Replacing (2) in (1):

$\alpha=\frac{v}{rt}$

We need to convert $\frac{km}{h}$ to $\frac{m}{s}$ :

$22\frac{km}{h}*\frac{1h}{3600s}*\frac{1000m}{1km}=6.11\frac{m}{s}$

Recall that:

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Replacing:

$\alpha=\frac{6.11\frac{m}{s}}{(3,5m)(10.8s)}\\\alpha=0.16\frac{rad}{s^2}$

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Meters would be the best way to record the length

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