What is the correct equation to use to calculate the resultant force for the below inclined plane Freebody diagram?

Add these measurements, using significant figure rules 1.0090cm + 0.02cm

Harlamova29_29 [7]

Answer:

1.03

Explanation:

0.02 has two significant decimal figures, so start by shortening 1.0090 to 2 decimal places (3 significant figures). Round up the decimal to become 1.1 and add .02 to get 1.3.

5 0

2 years ago

Can you answer this math homework? Please!

kap26 [50]

$\large \mathfrak{Solution : }$

9. An object which is in circular motion (moving along a circle) is said to be accelerating because it changes it's direction constantly even if it is moving with a constant speed. cuz acceleration is change in either magnitude or direction of an object with respect to time.

therefore, it's still acceleration as change in direction with time.

10. Average speed of an object can be calculated by dividing the total distance covered by an object by time taken to cover that distance.

i.e

$\boxed{speed = \dfrac{distance}{time} }$

it can be re- arranged to find the distance as :

$\boxed{distance = speed \times time}$

$time = \dfrac{distance}{speed}$

11. speed = 20 m/s : conversion into km/h

distance covered : 4 km = 4000 m

$time = \dfrac{distance}{speed}$

$t = \dfrac{4000}{20}$

$t = 200 \: \: sec$

time taken = 200 seconds

12. let's use the first equation of motion to find the acceleration :

$v = u + at$

$50 = 80 + 120a$

$50 - 80 = 120a$

$a = \dfrac{ - 30}{120}$

$a = - \dfrac{1}{4} m/s {}^{2}$

$- 0.25 \: \: m/s {}^{2}$

3 0

2 years ago

When electrons move back and forth, reversing their direction regularly, the current is called?

Feliz [49]

It is called "alternating current" or "ac current".

An alternating current is a current the periodically changes direction. Basically, the voltage difference applied at the two ends of the wire / of the circuit is constantly reversed. This means that at some point electrons travel in one direction, then the voltage is switched (i.e. the polarities are exchanged) and the electrons start to flow into the opposite direction, and so on.

4 0

3 years ago

How a typical human eye sees color?

gladu [14]

Light receptors within the eye transmit messages to the brain. This produces the familiar sensations of color. Newton observed that color is not inherent in objects. Instead, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors.

5 0

2 years ago

Read 2 more answers

An observer that stands still as the electron moves by him, will observe ___.

muminat

When charge is placed near to us whether it is stationary or if it is in motion then we can say it will produce electric field.

Now when charge is in motion then it will also produce electric current

So due to a moving charge there is some magnetic field also near it

it is given as

$B = \frac{\mu_0 qv}{4\pi r^2}$

So here we can say that nearby a moving charge we must have experience the effect of electric field as well as magnetic field

so the correct answer must be

<em>B) An electric & magnetic field</em>

3 0

2 years ago