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3 years ago

What does the delta symbol represent in the equation?

Physics

2 answers:

Alex_Xolod [135]3 years ago

6 0

Answer:

Whenever you see the delta symbol infront of another, it always represents change. In other words:

Δu = u_f - u_i

u_i means "initial velocity"
u_f means "final velocity"

And in general, ΔX means Xfinal - Xinitial

aleksklad [387]3 years ago

5 0

Answer:

khange in velokity

Explanation:

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Sunlight is reflected off of a puddle of water ahead of a driver. The index of refraction of the water is 1.333. If a driver sit

Lynna [10]

Answer:

option C is correct

distance from the driver is 2 m

Explanation:

Given data

index of refraction of the water n = 1.333

driver height from ground= 1.5 m

to find out

What angle does light become maximally polarized and what distance from the driver will polarized

solution

we know that n1 for water = 1.33 and we know for air n2 = 1

so tan(θ) = n1 / n2

tan(θ) = 1.33 / 1

so (θ) = 53.06 degree

so for distance d will be calculate as

tan ( 90 - (θ) ) = height / distance

tan ( 90 - 53.06 ) = 1.5 / distance

distance = 1.5 / 0.7519

distance = 1.994 m = 2 m

so option C is correct

distance from the driver is 2 m

5 0

3 years ago

Use of a buffered temperature probe is the most accurate way to measure actual vaccine temperatures.

Marianna [84]

The most precise method for determining the actual temperature of vaccines is to use a buffered temperature probe.

<h3>What is temperature?</h3>

Temperature directs to the hotness or coldness of a body. In clear terms, it is the method of finding the kinetic energy of particles within an entity.

Temperature is essential in all areas of Science right from Physics to Geology and also it is important in most parts of our everyday life.

The complete question is;

"What type of device should be used for measuring temperatures in a vaccine storage unit?"

A temperature monitoring system is required in every vaccine storage facility.

A buffered temperature probe offers the most precise storage unit temperature information, including a thorough history of how long a unit has been running beyond the advised temperature range.

Hence, the use of a buffered temperature probe is the most accurate way to measure actual vaccine temperatures.

To learn more about the temperature refer to the link;

brainly.com/question/7510619

#SPJ1

7 0

2 years ago

(this is somehow part of my science unit, dont ask why)

nirvana33 [79]

Answer:

Height of coffee mug = 5 cm

Explanation:

Changing all the data given in to unit cm

50 mm = 5 cm

20 cm = 20 cm

8 m = 800 cm

0.1 km = 100 m = 10000 cm

Since we need to find the height of coffee mug, it's height will not be more than 10 cm.

So 5 cm is the correct choice.

6 0

4 years ago

Lauryn serves a volleyball with a mass of 2.1 kg. The ball leaves her hand with a speed of 30 m/s.

Naya [18.7K]

Hi! Let's see.

<h3><u>TOPIC: Kinetic Energy.</u></h3>

Explanation:

Data:

Mass(m) = 2.1 kilograms
Speed(v) = 30 m/s
Kinetic Energy(Ek) = ?

==================================================================

Use the kinetic energy formula:

$\boxed{\boxed{\bold{E_{k}=\frac{m*(v)^{2}}{2}}}}$

Replace by the data:

$\boxed{E_{k}=\frac{2.1kg*(30\frac{m}{s})^{2}}{2}}}}}$

We multiply speed squared:

$\boxed{E_{k}=\frac{2.1kg*900\frac{m}{s}}{2}}}$

Multiply in the numerator, without forgetting the units:

$\boxed{E_{k}=\frac{1890J}{2}}}}$

Both numerator and denominador operations are divided:

$\boxed{\bold{E_{k}=945\ J}}$

Answer: The kinetic energy is <u>945 Joules.</u>

Cordially Alejanndraax. Greetings!

8 0

3 years ago

A crate of eggs is located in the middle of the flatbed of a pickup truck as the truck negotiates a curve in the flat road. The

oksian1 [2.3K]

Answer:

v = 14.35 m/s

Explanation:

As we know that crate is placed on rough bed

so here when pickup will take a turn around a circle then in that case the friction force on the crate will provide the necessary centripetal force on the crate

So here we have

$\mu mg = \frac{mv^2}{R}$