All categories

3 years ago

Which of the following is a scalar quantity?

Physics

1 answer:

makvit [3.9K]3 years ago

4 0

The only scalar quantity is a. 35 m

Explanation:

In physics, there are two types of quantities:

- Scalar: a scalar quantiy is a quantity having only a magnitude, so it is just a number followed by a unit. Examples of scalar quantities in physics are:

Speed

Energy

Distance

Time

- Vector: a vector quantity is quantity having both a magnitude and a direction. Examples of vector quantities in physics are:

Velocity

Force

Acceleration

Displacement

Let's now analyze each given option, to evaluate if it is a scalar or a vector:

a. 35m --> it is only a unit (no direction), so it is a scalar

b. 20 m to the right --> it has a direction, so it is a vector

c. 30 m to the North --> it has a direction, so it is a vector

So, the only correct option is a).

Learn more about scalars and vectors:

brainly.com/question/2678571

brainly.com/question/4945130

#LearnwithBrainly

You might be interested in

A wheel 30 cm in diameter accelerates uniformly from 245 rpm to 380 rpm in 6.1 s . Part A How far will a point on the edge of th

jonny [76]

Answer:

A point on the edge of the wheel will travel 199.563 radians at the given time.

Explanation:

Given;

initial angular velocity of the wheel; $\omega _i = 245 \ rev/\min = 245\ \frac{rev}{\min} \times \frac{2\pi}{1\ rev} \times \frac{1 \ \min}{60 \ s} = 25.66 \ rad/s$

final angular velocity of the wheel;

$\omega _f = 380 \ rev/\min = 380 \ \frac{rev}{\min} \times \frac{2\pi}{1\ rev} \times \frac{1 \ \min}{60 \ s} = 39.80 \ rad/s$

radius of the wheel, d/2 = (30 cm ) / 2 = 15 cm = 0.15 m

time of motion, t = 6.1 s

The angular distance traveled by the edge of the wheel is calculated as;

$\theta = (\frac{\omega_f + \omega_i}{2} )t\\\\\theta = (\frac{39.8 + 25.66}{2} )\times 6.1\\\\\theta = 199.653 \ radian$

Therefore, a point on the edge of the wheel will travel 199.563 radians at the given time.

6 0

3 years ago

When does a chemical indicator change?

S_A_V [24]

Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

8 0

3 years ago

When one object heats another, does the temperature increase of one object always equal the temperature decrease of the other ob

NeTakaya

Answer:

When one object heats another, the temperature increase of one object does not always equal the temperature decrease of the other object because one object has a higher specific heat than the other.

5 0

4 years ago

Substances that enhance the flow of current are called . Substances that inhibit the flow of current are known as . Substances t

astra-53 [7]

Answer:

Substances that enhance the flow of current are called conductors

Substances that inhibit the flow of current are known as insulators

Substances that neither conduct nor inhibit are called semiconductors

Explanation:

Substances that enhance the flow of current are called conductors because they allow electrical charges to pass through them.

Substances that inhibit the flow of current are known as insulators because they prevent the flow of electrical charges through them.

Substances that neither conduct nor inhibit flow of current as well are called semiconductors. These substances although they cannot conduct of prevent the flow of current, in certain conditions they can be made to conduct and reversed as well.

4 0

3 years ago

What are flavonoids responsible ?

Radda [10]

Answer: Flavonoids are a diverse group of phytonutrients (plant chemicals) found in almost all fruits and vegetables. Along with carotenoids, they are responsible for the vivid colors in fruits and vegetables. ... Like other phytonutrients, flavonoids are powerful antioxidants with anti-inflammatory and immune system benefits.

Explanation:

8 0

3 years ago