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3 years ago

The Earth moving round the Sun in a circular orbit is acted upon by a

1 answer:

3 0

No I do not agree. It is because work is done when force acting o a body displace or covers certain displacement in the direction of force applied .

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A way of grouping organisms based on characteristics they share is

miv72 [106K]

it is called classification

hope this helps :)

8 0

4 years ago

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

A thin-walled vessel of volume V contains N particles which slowly leak out of a small hole of area A. No particles enter the vo

LuckyWell [14K]

Answer:

$\frac{V}{2av}$

Explanation:

From the question we are told that

Volume V

Contains N particles

Leaks from a small hole of area A

Generally the equation for Flow rate is given as

Volume Flow Rate $V_r = A * v$

Mathematically we find the time taken to flow half way which is given by

$\frac{(V/2)}{A*v}$

Therefore the time taken is

$\frac{V}{2av}$

7 0

4 years ago

Which term is defined as the change in the direction of light when it goes from one medium into a different medium?

Vaselesa [24]

Refraction is the term

8 0

3 years ago

A particle undergoes two displacements. The first has a magnitude of 11 m and makes an angle of 82 ◦ with the positive x axis. T

Luden [163]

Answer:

$\theta = 211.7 degree$

Explanation:

First displacement of the particle is given as

$r_1$ = 11 m at 82 degree with positive X axis

so we can say

$\vec r_1 = 11 cos82 \hat i + 11 sin82 \hat j$

$\vec r_1 = 1.53\hat i + 10.9 \hat j$

resultant displacement of the particle after second displacement is given as

r = 8.7 m at 135 degree with positive X axis

so we can say

$r = 8.7 cos135\hat i + 8.7 sin135\hat j$

$r = -6.15 \hat i + 6.15 \hat j$

now we know that

$r = r_1 + r_2$

now we have

$r_2 = r - r_1$

so we will have

$r_2 = (-6.15 \hat i + 6.15 \hat j) - (1.53\hat i + 10.9 \hat j)$

$r_2 = -7.68 \hat i - 4.75 \hat j$

so angle of the second displacement is given as

$tan\theta = \frac{r_y}{r_x}$

$tan\theta = \frac{-4.75}{-7.68}$

$\theta = 211.7 degree$

8 0

3 years ago