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3 years ago

What scenario shows responsible behavior with regard to lab safety

1 answer:

5 0

You should ALWAYS wear lab coats and safety goggles because if anything gets in your eye that will be bad.You should always wear sneakers.If any chemical falls on your open toes then that can hurt you and effect you in a lot of ways.Some labs have this rule,you are not aloud to eat or drink in lab.Hope this helps!

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The large blade of a helicopter is rotating in a horizontal circle. The length of the blade is 7.26 m, measured from its tip to

Elan Coil [88]

Answer:

$\frac{a_1}{a_2}=1.67$

Explanation:

The equation for centripetal acceleration is $a_{cp}=r\omega^2$ . If $r_1=7.26m$ is the distance from the center of the point at the tip of the blade and $r_2=4.35m$ is the distance from the center of another point in the blade, and since both points are rotating at the same angular velocity $\omega$ because both of them belong to the blade, the ratio between their centripetal accelerations will be:

$\frac{a_1}{a_2}=\frac{r_1 \omega^2}{r_2 \omega^2}=\frac{7.26m}{4.35m}=1.67$

5 0

3 years ago

A Carnot heat engine has an efficiency of 0.200. If it operates between a deep lake with a constant temperature of 293.0 K and a

Dimas [21]

Answer:

366 K

Explanation:

T₀ = Constant Temperature of deep lake = 293.0 K

T = Temperature of hot reservoir connected to carnot engine = ?

η = Efficiency of Carnot engine during the operation

Efficiency of Carnot engine is given as

$\eta = 1-\frac{T_{o}}{T}$

Inserting the values

$0.200 = 1-\frac{293.0}{T}$

T = 366 K

3 0

3 years ago

The earth revolves around the sun in its orbit as shown in the figure. Is there any difference in the amount of gravitational fo

Bingel [31]

Answer:

No.

Explanation:

There is no change in gravitational force based on the sizes remaining the same. If there was a change in gravitational force the orbits of all planets would change.

5 0

3 years ago

A graduated cylinder is filled with water to the 24-mL mark. When a rock is placed in the cylinder, the level rises to the 53-mL

harkovskaia [24]

30ml is the correct answer to your question hope i can help

6 0

3 years ago

An empty glass does not dip in water in upside down position why

skad [1K]

Answer:

An empty glass does not dip in water in upside down position because of air cavity present in it which doesnot let water enter the glass when kept it in upside down position

8 0

2 years ago