Where in the laboratory is long, unrestrained hair most likely to be a safety concern?

Answers

Answer 1
Answer: Probably anything concerning fire
Answer 2
Answer:

Final answer:

Long, unrestrained hair can be a safety concern in a laboratory, especially around areas with high temperatures and equipment that can generate electrical charges. This is because it can catch fire or interact with charged substances or devices, posing risk of burns or other accidents.

Explanation:

In a laboratory, long, unrestrained hair is most likely to be a safety concern around areas with high temperatures and equipment that can generate electrical charges. For example, near a microwave oven or other heating devices used in experiments. Heat can cause hair to catch fire, resulting in severe burns. Also, hair can contain an imbalance of electrical charges, the phenomenon of static electricity, which might interact with certain lab equipment or substances, thereby posing an additional risk. Thus, it is essential to tie or restrain long hair when in a laboratory to ensure safety.

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Which of the following statements is an accurate description of vibrations? A. Neither ultrasonic nor infrasonic vibrations can be heard by humans. B. The frequency of infrasonic vibrations is much too high to be heard by humans. C. Ultrasonic vibrations have a frequency lower than the range for normal hearing. D. Infrasonic vibrations are used in sonar equipment as well as to detect flaws in steel castings.
Which of the following best explains why most chemical reactions proceed more quickly when the concentrations of reactants are increased?a. The increased concentration increases the number of collisions between molecules. b. The products of chemical reactions are more stable at higher concentrations. c. At higher concentrations, reactant molecules move more quickly. d. At higher concentrations, product molecules are able to catalyze the reaction.
All of the earth's life and weather exists within the stratosphere. a. True b. False
An object's color is determined by the wavelengths of light that it _______. A. diffracts. B. reflects. C. refracts. D. absorbs.
Some types of storage tanks are exempt from the federal regulations on USTs, including A) tanks that store heating oil burned on the premises. B) tanks that hold less than 200 gallons. C) farm and residential tanks that hold 2,000 gallons or less of motor fuel used for noncommercial purposes. D) all of these.

Blue light and yellow light combine to produce white light becausea. they absorb each other s wavelengths.
b. blue, yellow, and white are primary colors.
c. they are complementary colors of light.
d. they are both primary colors of light.

Answers

Answer: The correct answer is c.

Explanation: According the RGB color model, the light of the two complementary colors will combine to form a white light. This happens because the complementary colors combine at full intensity.

Complementary colors according to RBG color model is:

  1. Red - Cyan
  2. Green - Magenta
  3. Blue - Yellow

From the above information, we conclude that blue light and yellow light are complementary colors of light and hence, the combination of two will produce white light.

Blue and yellow light combine to produce white light because they are complementary colors of lights.
When you say complementary colors, it refers to a combination of 2 colors that when mixed, they fade out their color. That's why when blue light and yellow light are combined they produces white light.

Isotopes have variable numbers of electrons.
a. True
b. False

Answers

Isotopes have the same number of valence electrons

_____________ was a popular technique used by animator, Tim Burton. With this animation technique, objects/puppets are made by the artist, and each time they are moved, the artist photographs them instead of drawing them.a. Cel animation
c. Projecting animation
b. Computer Generated Imagery
d. Stop motion animation

Answers

The correct answer is D. stop motion animation. It's called stop motion because you make an illusion of a motion by moving and stopping the characters and then reshooting. This is pretty common but takes a lot of time so not many people choose to do it. It also takes great skill to do it, not just patience.

Stop motion animation is the popular technique that is used by animator, where objects/puppets are made by the artist, and each time they are moved.

What is animation?

Animation can be regarded as a method whereby figures are been manipulated so as to appear as moving images.

One of the notable type of animation is Stop motion animation where the artist photographs the figure instead of drawing them.

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When we say that an object wants to maintain its state of motion, we’re talking about inertia. Which term determines the quantity of inertia for an object?

Answers

Inertia is determined by the mass of the object. greater the mass an object has, greater will be its inertia. smaller the mass an object has, smaller will be its inertia. Greater mass enables an object to resist change in its state of motion or rest while on the other hand smaller mass object can be easily made to change its state of motion or rest.

and object has mass, so if moving, has a momentum value. 

Which of the items has the least inertia while at rest? A. penny. B. airplane. C. frog. D. dog.

Answers

Answer:

A penny

Explanation:

Train is traveling at an initial velocity of 68.325m/s. After 23.75 seconds it speeds up to a final velocity of 79.32m/s. What is the train's acceleration during this time

Answers

So,

We know that:
acceleration =  ( final\ velocity\ -\ initial\ velocity)/(time)

Plug in the values.
acceleration =  (79.32 m/s^(2)\ -\ 68.325m/s^(2))/(23.75 secs)
acceleration =  (10.995m/s^(2) )/(23.75 secs)
acceleration = 0.4629 m/s^(2)