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3 years ago

How do you study physics?

Physics

2 answers:

Alex17521 [72]3 years ago

7 0

Everybody is different but i study the best with flash cards but it's whatever is best for you

Butoxors [25]3 years ago

3 0

You could make an index card study packet.

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In a pendulum experiment the pendulum moves from one side to the other side in 0.6 second. Calculate the period of the pendulum.

-Dominant- [34]

Answer:

1.2 s

Explanation:

The period of a pendulum is the time it takes to complete one cycle, as in move and return to its initial state, for example going from one side to the other and coming back. If this pendulum goes from one side to the other in 0.6 s, it will take it the doble of that time to perform a cycle, and that is the period

T = 2 * 0.6 s = 1.2 s

5 0

4 years ago

If |v|= 11, |w|= 23, |v-w|= 30, find |v+w|

GenaCL600 [577]

Answer:

$|v+w|=20$

Explanation:

We are given that

|v|=11

|w|=23

|v-w|=30

We have to find the value of |v+w|

|a-b|^2=(a+b)\cdot (a+b)=a^2+b^2-2|a||b|cos\theta

Using the formula

$(30)^2=(11)^2+(23)^2-2(11)(23)cos\theta$

$900=121+529-506cos\theta$

$900-121-529=-506cos\theta$

$250=-506cos\theta$

$cos\theta=-\frac{250}{506}$

$|a+b|^2=|a|^2+|b|^2+2a\cdot bcos\theta$

Using the formula

$|v+w|^2=(11)^2+(23)^2+2(11)(23)\times (-\frac{250}{506})$

$|v+w|^2=400$

$|v+w|^2=(20)^2$

$|v+w|=20$

7 0

3 years ago

Suppose a star has the same apparent brightness as Alpha Centauri A ( 2.7×10−8watt/m2 ) but is located at a distance of 300 ligh

iragen [17]

For a star that has the same apparent brightness as Alpha Centauri A ( 2.7×10−8watt/m2 is mathematically given as

L=2.7*10^30w

<h3> What is its luminosity?</h3>

Generally, the equation for the luminosity is mathematically given as

L=4*\pi^2*b

Therefore

L=4*\pi^2*b

L=4* \pi *(2.83*10^{18})*2.7*10^{-8}

L=2.7*10^30

In conclusion, the luminosity

L=2.7*10^30w

Read more about Light

brainly.com/question/25770676

6 0

2 years ago

The index of refraction of a type of glass is 1.50, and the index of refraction of water is 1.33. If light enters water from thi

Damm [24]

Answer:

Option C - the angle of refraction is greater than the angle of incidence

Explanation:

Snell's law of refraction states that;

n1 sinθ1 = n2 sinθ2

Where;

n1 is refractive index of incidence medium

θ1 is angle of incidence

n2 is Refractive index of refraction medium

θ2 is angle of refraction

For This question, n1 = 1.5 and n2 = 1.33

Thus;

1.5 sinθ1 = 1.33 sinθ2

Rearranging, we have;

sinθ1/sinθ2 = 1.33/1.5

We know from trigonometry, that sin 0 = 0 and sin 90 = 1. So, as θ approaches 0°, the value of sinθ decreases while as it approaches 90°,the value of sinθ increases.

Thus, by inspection, we can say that the value of the denominator is higher than the numerator.

Thus, θ2 is greater than θ1

So, the angle of refraction is greater than the angle of incidence

4 0

3 years ago

Which of the following vectors is equal to r⃗ AB?

alisha [4.7K]

<h3>Vector AB is equal to vector DC</h3>

<h3>Further explanation</h3>

Vector is a quantity that has a magnitude and direction.

A vector in a cartesian coordinate is represented by an arrow in which the slope of the arrow shows the direction of the vector and the length of the arrow shows the magnitude of the vector.

A position vector of a point is a vector drawn from the base point of the coordinates O (0,0) to that point.

The addition of two vectors can be done in the following ways:

$\overrightarrow {AB} + \overrightarrow {BC} = \overrightarrow {AC}$

A negative vector is a vector with the same magnitude but in opposite direction.

$\overrightarrow {AB} = -\overrightarrow {BA}$

Let's tackle the problem!

Two vectors are equal if they have the same magnitude and direction. In the attached picture, it can be clearly seen that the vector AB has the same magnitude and direction with vector DC. Therefore, vector AB is equal to vector DC.

<h3>Learn more</h3>

Velocity of Runner : brainly.com/question/3813437

Kinetic Energy : brainly.com/question/692781

Acceleration : brainly.com/question/2283922

The Speed of Car : brainly.com/question/568302
Magnitude of A Vector : brainly.com/question/2678571

<h3>Answer details</h3>

Grade: High School

Subject: Physics

Chapter: Vectors

Keywords: Velocity , Driver , Car , Deceleration , Acceleration , Obstacle , Speed , Time , Rate , Vector , Scalar

7 0

3 years ago