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Anestetic [448]
3 years ago
12

A vector R is resolved into its components, Rx and Ry. If the ratio of is 2, what is the angle that the resultant makes with the

horizontal?

Physics
2 answers:
Umnica [9.8K]3 years ago
7 0

Answer: The angle formed will be 26.56° .

Explanation: Vector R is resolved in two components, which are R_x and R_y, the resultant R is given by:

R=\sqrt{R_x^2+R_y^2

From the diagram, the ratio of R_y\text{ and }R_x is given by the equation:

\tan\theta=\frac{R_y}{R_x}

We are given the ratio of R_x\text{ and }R_y which is 2, so ratio of R_y\text{ and }R_x will be \frac{1}{2}

\frac{R_y}{R_x}=\frac{1}{2}

Putting value in \tan\theta equation, we get:

\tan\theta =\frac{1}{2}\\\\\theta=\tan^{-1}(0.5)\\\\\theta=26.56^o

Artemon [7]3 years ago
6 0
The angle is 26.56 degrees
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What is the speed of a walking person in m/s if the person travels 1000 m in 20 minutes?
Nata [24]

Answer:

0.83m/s

Explanation:

Given parameters:

distance  = 1000m

time taken  = 20min

Unknown:

Speed of the walking person  = ?

Solution:

To solve this problem;

    Speed  = \frac{distance}{time taken}

  Time taken should be in seconds;

                 1 min   =  60s

                 20min  = 20 x 60  = 1200s

Speed  = \frac{1000}{1200}   = 0.83m/s

8 0
3 years ago
1) Subatomic particles called muons can be created in the upper atmosphere by collisions of cosmic rays (energetic particles com
Vsevolod [243]

Answer and explanation:

A.

Muon travelled straight down towards the earth. Therefore the tree moves up in the rest frame of muon (option a)

B.

In muon rest frame it travels Zero meters

C.

Distance, d = Velocity, v * Time, s

where, v = 0.9c = 0.9 \times 8 \times 10^8 , s = 2.2 \mu s

d = 0.9 \times 3 \times 10^8 \times 2.2 \times 10^{-6}\\\\d = 594m

D.

Distance from the top of the mountain to the tree is the same as the distance travelled by the tree in the muons rest frame

that is same as in part C which is 594m

E.

Using lorentz contraction

In the rest frame of someone standing on the mountain

the distance is given by

d' = \frac{d}{\gamma} = d\sqrt{1 - \frac{v^2}{c^2}}, where, \frac{1}{\gamma}= \sqrt{1 - \frac{v^2}{c^2}}

d' = 594\sqrt{1 - \frac{(0.9c)^2}{c^2}}

d' = 594\sqrt{1 - 0.81}

d' = 594 \times 0.4359

d' = 258.92m

F.

in the rest frame of someone standing on the mountain,

muon moves straight down

3 0
4 years ago
3.) Brady walks 5 meters forward, turns right, walks 25 meters, turns right again, walks 5
Triss [41]

Answer:

Distance covered is: 45 meters

Displacement is 15 meters to the right of where he started

Explanation:

Notice that Brady has walk a path that looks like an incomplete rectangle of height 5 meters and length 25meters, although he actually didn't cover the full length (25 meters) when getting back to the point where he started (he made just 10 meters instead of 25 after the third turn right) See attached image.

Therefore, Brady's displacement is 15 meters to the right of where he started, and the total distance he covered is :

Distance = 5m + 25m + 5m + 10m = 45m

5 0
3 years ago
The magnetic field at the earth's surface can vary in response to solar activity. During one intense solar storm, the vertical c
Natalka [10]

Answer:

EMF = 1684.67 Volts

Explanation:

As we know that EMF is induced in a closed conducting loop if the flux linked with the loop is changing with time

So we can say

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now we have

\phi = BA

here since magnetic field is constant so we have

EMF = A\frac{dB}{dt}

now we have

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A = 3.61 \times 10^{10} m^2

now we have

EMF = 3.61\times 10^{10} (\frac{2.8 \times 10^{-6}T}{60 s})

EMF = 1684.67 Volts

6 0
3 years ago
How far can a person run in 15 minutes if he or she runs at an average speed of 16 km/hr
Studentka2010 [4]
4 km/hr. There are four quarters in an hour, so just divide 16 by 4 and you get 4. It is directly proportional.
6 0
3 years ago
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