A measurement that has both magnitude and direction

Answers

Answer 1

Answer: A measurementthat both magnitude and direction is a vector quantity. An example of this is amoving car. The car exerts force due to its thrust and weight that runs in it. Thiswill give us the magnitude of the car. The resulting motion of the car in termsof displacement, velocity and acceleration that determines its direction makesit a vector quantity. On the other hand, a measurement that has only magnitude isa scalar quantity. The energy exerted by the engine of the car is a scalarquantity.

Related Questions

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3. You are walking in Paris alongside the Eiffel Tower and suddenly a croissant smacks you on the head and knocks you to the ground. From your handy dandy tourist guidebook you find that the height of the Eiffel Tower is 300.5 m. If you neglect air resistance, calculate how many seconds the croissant dropped before it tagged you on the head.
The term "accuracy" best refers to which of the following?a. whether or not a measurement is correctb. how "close together" a set of measurements isc. whether or not a tool for making measurements is usefuld. how close a measurement is to an accepted value for the measurement
The smallest group of particles in a crystal that retains the shape of the crystal is called the
Show that one ampere is equivalent to a flow of 6.25*10^18 elementary charges

The red LED consists of a white LED covered with a red filter. What does the red filter do?

Answers

White light is light that's made up of ALL colors.

If you have a source of white light and you want red light,
then you have to REMOVE all the other colors from the
white light somehow.

That's what a red filter does. The dye in the filter has chemicals
that absorb every color of light except red. Then, red light is the
only thing left to come out of the other side.

(If the light going into the filter had no red in it, then the filter
would appear black, because there wouldn't be any light
coming out of it at all.)

Answer:

black is it

Explanation:

Matter is anything that

Answers

takes place in the space and it can be fluid or solid

John’s mass is 91.2 kg, and Barbara’s is 51.9 kg. He is standing on the x axis at xJ = +9.99 m, while she is standing on the x axis at xB = +3.27 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?

Answers

Answer:

the center of gravity moves by 1.9 m towards the origin

Explanation:

from the question we are given the following

John's mass (Mj) = 91.2 kg

Barbara's mass (Mb) = 51.9 kg

John's location (Xj) = + 9.99 m

Barbara's location (Xb) = +3.27 m

center of mass (X) = ?

the center of mass is where the masses of John and Barbara is concentrated, and it is given by the formula below

X = ( ( Mj x Xj ) + ( Mb x Xb ) ) / (Mj + Mb)

X = ( ( 91.2 x 9.99 ) + ( 51.9 x 3.27 ) ) / ( 91.2 + 51.9 )

X = 7.6 m

now when they switch positions their locations now become

John's location (Xj) = + 3.27 m

Barbara's location (Xb) = +9.99 m

now putting their new locations into the formula

X = ( ( 91.2 x 3.27 ) + ( 51.9 x 9.99 ) ) / ( 91.2 + 51.9 )

X = 5.7 m

therefore the center of mass moves by

7.6 - 5.7 = 1.9 m

the center of gravity moves by 1.9 m towards the origin

When the body is in water, how many times faster does it lose heat than when it is in still air? A) 2 B) 10 C) 100 D) 25

Answers

Answer:D)25

Explanation:

I got it right

If you wanted to increase the voltage, which would you use?a. generator
b. step-up transformer
c. step-down transformer
d. motor
e. detector

Answers

The correct answer of the question is : B) Step-up transformer.

EXPLANATION :

Before coming into any conclusion, first we have to understand the step-up and step-down transformer.

The step-up transformer is the transformer whose transformer ratio is greater than one. It means it will increase the voltage of the source or decrease its current.

On the other hand, the transformer ratio of step-down transformer is less than one. Hence, it will decrease the higher voltage to lower voltage or increase the lower current into higher current of the given source.

As per the question, we want to increase the voltage of the source.

Hence, we have to use step-up transformer.

b) step-up transformer

In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment in which they scattered alpha particles (nuclei of helium atoms) from thin sheets of gold. An alpha particle, having charge 2e and mass 6.64 10-27 kg, is a product of certain radioactive decays. The results of the experiment led Rutherford to the idea that most of an atom's mass is in a very small nucleus, with electrons in orbit around it. Assume an alpha particle, initially very far from a stationary gold nucleus, is fired with a velocity of 1.50 107 m/s directly toward the nucleus (charge 79e). What is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction?

Answers

Answer:

Explanation:

We shall apply conservation of mechanical energy

kinetic energy of alpha particle is converted into electric potential energy.

1/2 mv² = k q₁q₂/d , d is closest distance

d = 2kq₁q₂ / mv²

= 2 x 9 x 10⁹ x 79e x 2e / 4mv²

= 1422 x2x (1.6 x 10⁻¹⁹)² x 10⁹ /4x 1.67 x 10⁻²⁷ x (1.5 x 10⁷)²

= 3640.32 x 10⁻²⁹ /2x 3.7575 x 10⁻¹³

= 484.4 x 10⁻¹⁶

=48.4 x 10⁻¹⁵ m

Other Questions

you apply the same amount of heat to five grams of substance a and five grams of substance b. the temperature of both substances increases by the same amount. what can you conclude?

If you drop a 50 gram piece of metal that has a temperature of 110°Celsius into 1000 grams of water at 25°Celsius, what best describes what would occur?A.) The water will quickly reach the boiling point. B.) The water’s temperature will stay the same, but the metal will cool down. C.) The water’s temperature will increase, and the metal will stay constant. D.)The water and the metal’s temperature will reach the same temperature.

I need help with science

In terms of density and humidity, which conditions characterize a high-pressure area? A.high density, high humidity B.high density, low humidity C.low density, low humidity D.low density, high humidity