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2 years ago

Which of the following are for vector directione?

1 answer:

8 0

Answer:
C. outside 45 degrees
Step-by-step explanation:
C. outside 45 degrees
because it can be any point or direction outside 45 degrees

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How to write a composition about the shopping day

NeX [460]

Just explain the day of how you were shopping and there you have it

5 0

3 years ago

a particle is moving along a circular path having a radius of 4 in such that its position as a function of time is given by thet

ANTONII [103]

Answer:

Explanation:

Given

radius of circular path $r=4\ in.$

Position is given by

$\theta =\cos 2t---1$

Differentiate 1 to angular velocity we get

$\frac{\mathrm{d} \theta }{\mathrm{d} t}=\omega =-2\sin 2t----2$

Differentiate 2 to get angular acceleration

$\frac{\mathrm{d} \omega }{\mathrm{d} t}=-2^2\cos 2t ---3$

Net acceleration is the vector summation of tangential and centripetal force

$a_t=\alpha \times r$

$a_t=-4\cos 2t\times 4=-16\cos 2t$

$a_r=\omega ^2\cdot r$

$a_r=(-2\sin 2t)^2\cdot 4$

$a_r=16\sin^2(2t)$

$a_{net}=\sqrt{a_r^2+a_t^2}$

$a_{net}=\sqrt{(16\sin ^2(2t)+(-16\cos 2t)^2}$

$a_{net}=\sqrt{256\cos ^2(2t)+256\sin ^4(2t)}$

6 0

3 years ago

How is electron movement related to the bonding in sodium chloride? A) The atomic orbitals overlap and share electrons causing a

posledela

Answer: Option (C) is the correct answer.

Explanation:

Sodium has atomic number 11 and its electronic distribution is 2, 8, 1. Whereas chlorine has atomic number 17 and its electronic configuration is 2, 8, 7.

Therefore, we can see that sodium has one extra electron and chlorine has deficiency of one electron.

So, in order to complete their octet sodium will give its one valence electron to the chlorine atom. Hence, there is exchange of electrons and thus it will result in the formation of ionic bond.

Thus, we can conclude that in sodium chloride electron movement is related to the bonding as electrons exchange creating ions to form an ionic bond by electrostatic attraction.

8 0

3 years ago

Read 2 more answers

Imagine that you are jumping up and down on a trampoline.

lions [1.4K]

Answer:

a. When you are pressing downwards the energy stored is potential elastic energy due to the elasticity of the stretchy skin.

b. When you are high up in the air the energy stored is potential energy due to your weight and the distance to the ground.

Hope this Helps!

If you have Any questions Please Ask.

5 0

2 years ago

Um corpo de massa 2,5kg é lançado verticalmente para cima. Se o sistema for considerado conservativo e no instante em que ele é

kvv77 [185]

Answer:

Energia mecânica = 300 Joules

Mechanical Energy = 300 Joules

Explanation:

given

m = 2.5kg

g=10m/s²

h=?

K.E = P.E

K.E = 150Joules

¹/₂mv² = m ×g ×h

150 J = 2.5 × 10 × h

h = 150/25

h= 6m

Mechanical energy = K.E + P.E

ME = 2 × 150 J

Mechanical Energy = 300Joules

dado

m = 2,5 kg

g = 10m / s²

h =?

K.E = P.E

K.E = 150Joules

¹ / ₂mv² = m × g × h

150 J = 2,5 × 10 × h

h = 150/25

h = 6m

Energia mecânica = K.E + P.E

ME = 2 × 150 J

Energia mecânica = 300Joules

7 0

3 years ago