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3 years ago

Which of the following is a vector quantity?

Physics

1 answer:

djverab [1.8K]3 years ago

4 0

Vector quantity is defined by direction as well as magnitude both

so now lets discuss all option

1) distance = it is total path length between two points so there is no direction needed in it so it is scalar

2) Speed = it is ratio of total distance covered and total time, so it also do not require any direction.

3)velocity = it is ratio of displacement and time, and displacement is always given with direction so velocity is a vector quantity

4) time = time is the measurement of the interval of two events and we do not require any direction in it so its a scalar quantity.

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50 POINTS PLZZ ANSWER

LekaFEV [45]

The Coordinate Methodology is a technique for converting geometrical images into formulas, a technique for describing visuals with letters and numbers representing constant and factors. It is essential in learning calculus and other mathematical topics, and the further calculation can be defined as follows:

$\to \bold{A(0,0)}\\\\\to \bold{B(100,0)}\\\\$

So,

$\to \bold{C:(100,-200)}\\\\\to \bold{D: (100-75\sqrt{3},-275)}\\\\\to \bold{E: (-25-75\sqrt{3},-125\sqrt{3}-275)}\\\\$

calculating the E distance A:

$\to \bold{\sqrt{(-25-75\sqrt{3})^2+ (125\sqrt{3}- 275)^2}}\\\\\to \bold{ 25\sqrt{(225-104\sqrt{3})}}\approx 167.46\ m\\\\$

In this question, by using the coordinates method to calculate the distance from the start point to the end point.

Please find the graph in the attached file.

Learn more:

brainly.com/question/21864093

5 0

2 years ago

Which of the following best describes the circuit shown below?

Irina18 [472]

The circuit that best describes the circuit shown in the image is an open circuit.

As you can see on the diagram,the circuit is not complete. At the upper right-hand corner, the wire is not connected. This means that the pathway is open.

7 0

4 years ago

Read 2 more answers

An iv curve is generated for two ohmic devices, one is a good conductor and the other is a good insulator. which one will have a

allochka39001 [22]

As per the question there are two ohmic devices.

The first ohmic device is a good conductor and the second one is a good insulator.

As per Ohm's law the current flowing through a conductor is directly proportional to the potential difference maintained across the two ends of a conductor at constant temperature and pressure. If V is the potential and I is the current flow through these Ohmic devices,then mathematically it can be written as-

V∝ I [ at constant temperature and pressure]

⇒V= IR

Here R is the proportionality constant called resistance of the material.

Hence the resistance R is calculated as -

$R=\frac{V}{I}$

Now a graph is plotted taking potential V on X-axis and current I along Y- axis.

The graph will be a straight line for conductor and will be a curve depending on the type of insulator.

The slope of this graph will give the resistance of the material.

An insulator is a substance through which current flow is very low as its resistance is very high.Hence the slope of the V-I curve is very large.

A conductor is that substance through which current is flown easily as the resistance of conductor is very low.Hence the slope of V-I curve is smaller,

5 0

3 years ago

The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?

pav-90 [236]

Answer:

25g

Explanation:

Given parameters:

Half life of X = 5days

Mass of sample of radioactive elements = 100g

The half-life of a radioactive material is the time it takes for a sample to decay by half. At the half-life, an original sample would have yielded equal daughter to parent ratio.

At time (days) Mass of sample

0 100g

5 50g

10 25g

Every 5 days, the sample will split into half.

Therefore, 25g will remain after 10days.

3 0

3 years ago

Phil is riding a scooter and pushes off the ground with his foot. this causes him to accelerate at 12 m /s. Phil weighs 600 N. h

Dvinal [7]

Answer:

734.16 kg m/ $s^{2}$

Explanation:

The problem is asking for the Force of pushing off the ground.

The formula of Force is: F = mass x acceleration

Given = Mass: 600 newtons (N)

Acceleration: 12 m/ $s^{2}$

We have to convert the mass into kg first. Remember that 1 kg is equal to 9.80665 newtons.

Let x be the mass in newtons.

Let's convert: $\frac{1 kg}{9.80665 N}$ x $\frac{x}{600 N}$ = $\frac{600}{9.80665}$ = 61.18 kg

Phil's weight is 61.18 kg

Let's go back to finding the force.

F = m x a

F = 61.18 kg x 12 m/ $s^{2}$

F = 734.16 kg m/ $s^{2}$

7 0

3 years ago