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4 years ago

If an employee gets injured when while preparing food, bandages should be:

Physics

1 answer:

My name is Ann [436]4 years ago

4 0

Answer:

B. Covered with a single -use glove

Explanation:

The correct would be to cover the bandage with a single-use glove.

In order to prevent contamination as well as reduce the risk of aggravated injury during food handling, injuries should be bandaged immediately they happen. Neither bandage nor glove alone is sufficient to prevent food contamination. Both bandage and glove should be used to create what is known as a double barrier.

The glove to be used in this case should be a single use/disposable glove.

The correct option is B.

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If the pressure of a gas sample is quadrupled and the absolute temperature is doubled. True or False

Vanyuwa [196]

The given statement"If the pressure of a gas sample is quadrupled and the absolute temperature is doubled" is false.

Answer: Option B

Explanation:

As we know the direct relationship between Pressure and Temperature by the Gay-Lussac’s Law,

$P_{1} T_{1}=P_{2} T_{2}$

From this, we get,

$\frac{P_{1}}{T_{2}}=\frac{P_{2}}{T_{1}}$

$T_{2}=\frac{P_{1} T_{1}}{P_{2}}$

So, according to given statement, we have $P_{2} = 4 P_{1}$

Then from the above expression, we can find out the value of $T_{2}$ when pressure increased by 4 times of initial pressure as,

$T_{2}=\frac{P_{1} T_{1}}{4 P_{1}}$

Hence, we get,

$T_{1}=4 T_{2}$

Hence, from the above expression we can say that as we increase the pressure four times, the temperature does not get doubled. So, the given statement in the question is false.

6 0

4 years ago

You are on an airplane that is landing. The plane in front of your plane blows a tire. The pilot of your plane is advised to abo

kvv77 [185]

Answer: plane speed is 94.87m/s

Explanation: since the plane move upward in a semicircular path, the acceleration is a centripetal acceleration with radius of 500metre. But the Centripetal acceleration is given as

Centripetal acceleration

= Speed ²/radius

Making speed subject of formula we have,

Speed² = centripetal acceleration*radius

Speed² = 18*500

=9000

Speed =√9000

= 94.87m/s

7 0

3 years ago

Why are very high temperatures and pressures required for fusion to occur?

SashulF [63]

Answer:

Explanation:

7 0

3 years ago

It takes 8 seconds for a pulley system to lift a load that weights 400N to a height of 10 m. How much power is required?.

mariarad [96]

Answer:

C. 500 watts

Explanation:

power is defined as the rate of work done

$power=\frac{work.done}{time}$

When a force causes a object to move, work is being done on the object by the force.

$work.done=force*displacement\\=400*10\\=4000J$

$power=\frac{4000J}{8s}\\=500 W$

3 0

4 years ago

A narrow beam of light containing orange (610 nm) and blue (470 nm) wavelengths goes from polystyrene to air, striking the surfa

Eva8 [605]

Answer: The angle between the two colours when they emerge is 0.4°

Explanation:

The refracting angle for different colors knowing its refractive index can be calculated using Snell's law.

Ni × sin α = Nr × sinβ

Where Ni is the refractive index for light in incident medium

α is the angle the incident makes with normal

Nr is the refractive index for light in the refractive medium

β is the angle the refracted makes with the normal

Making β the subject

β = arcSin ( Ni × sinα)/Nr

For Orange color

The value of refractive index in polystyrene medium is 1.490 ,that is Ni= 1.490

α is 30° and Nr is the refractive index of air = 1

β = arcSin(1.490×sin30°)/1

β= 48.15°

For Blue color

The value of refractive index in polystyrene medium is 1.499,that is Ni= 1.499

α is 30° and Nr is the refractive index of air = 1

β = arcSin(1.499×sin30°)/1

β= 48.55°

The angle between the two colours is the difference in the angles of their refracted rays

48.55-48.15=0.4°

6 0

3 years ago