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3 years ago

Which is a vector quantity

Physics

1 answer:

Korolek [52]3 years ago

4 0

Explanation:

Physical quantities are usually designated as either vector or scalar quantities.

There are several fundamental quantities know out there that makes definition of the world possible. Derived quantities are obtained from these fundamental quantities.

A vector quantity expresses a quantity that shows both magnitude and direction.
With a vector, you know the amount or quantity of measurement taken and the directional attribute.
A scalar quantity is a quantity that shows magnitude but no direction.
For example velocity is a vector and speed is a scalar. If a body moves at 10m/s due east, that is a vector.

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Plzzz help will mark brainliest

Lady_Fox [76]

Answer: A. 1.0

Explanation:

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3 years ago

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Two point charges are fixed on the y axis a negative point charge q1-26 μC at y1 = +0.21 m and a positive point charge q2 art y2

11111nata11111 [884]

Answer:

$3.13\times 10^{-5} C$

Explanation:

We are given that

$q_1=26\mu C=26\times 10^{-6} C$

$1\mu C=10^{-6} C$

$y_1=0.21 m$

$q=8.1\mu C=8.1\times 10^{-6} C$

$y_2=0.39 m$

F=28 N

We have to find the magnitude of q2.

We know that

$F=\frac{kq_1q_2}{r^2}$

Where $k=9\times 10^9$

Using the formula

Force on charge q due to charge q1

$F_1=\frac{9\times 10^9\times 26\times 10^{-6}\times 8.1\times 10^{-6}}{(0.21)^2}$

$F_1=42.98 N$

Force on charge q due to point charge q2

$F_2=\frac{9\times 10^9\times q_2\times 8.1\times 10^{-6}}{(0.39)^2}$

$F_2=4.79\times 10^5 q_2$

$F=F_1-F_2$

$28=42.98-4.79\times 10^5q_2$

$4.79\times 10^5q_2=42.98-28=14.98$

$q_2=\frac{14.98}{4.79\times 10^5}=3.13\times 10^{-5} C$

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3 years ago

An electron is traveling horizontally toward the north in a uniform magnetic field that is directed vertically downward. In what

Arte-miy333 [17]

Answer:

e) upwrad z axis

Explanation:

To know the direction of the force we use the right hand rule.

The thumb points in the direction of the velocity, the fingers extended in the direction of the magnetic field and the palm of the hand in the direction of the force, this is for a positive charge if the charge is negative the force is in the opposite direction of The palm of the hand.

Let's apply to our case.

The thumb is in the x direction, the fingers in the vertical direction and since the electron has a negative charge, the force is on the z axis (perpendicular to the blade, coming out)

In general, in the nomenclature of the cardinal points the positive x-axis is the East, the positive y-axis is the North. Therefore the answer must be up on the z axis

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3 years ago

A cell phone company relies on which kind of waves in order to provide service for its customers? ultraviolet waves infrared wav

Greeley [361]

Answer:

microwaves

Explanation:

Electromagnetic waves consist of waves of different wavelengths. Among the choices given, waves are ordered for increasing wavelengths as follows:

gamma rays --> ultraviolet waves --> infrared waves --> microwaves

So, microwaves are the waves with the longer wavelength among the given choices. This is the reason why they are used by the cell phone companies: in fact, since they have longer wavelengths, microwaves can travel longer distances without being absorbed by objects or obstacles, and so they are more reliable for broadcasting and telecommunications.

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3 years ago

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A force of 1 N is the only horizontal force exerted on a block, and the horizontal acceleration of the block is

SVEN [57.7K]

The mass of the first block will be three times the mass of the second block.

According to Newton's second law of motion, the force acting on a body is directly proportional to the acceleration as shown;

$F\ \alpha \ a$