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xenn [34]
3 years ago
9

Find the unit vector in the direction of the resultant vector A=2i-3j+4k B=i+j+2k C=3i-2j+4k

Physics
2 answers:
Svetlanka [38]3 years ago
7 0
The length of this vector is ∣D∣=√62+22+72=√89, so the unit vector in the direction of D is⃗e=1√89(6;-2;7)
shtirl [24]3 years ago
4 0

Answer:

R = 6i - 4j + 10k

Explanation:

R = (2 + 1 + 3)i + (-3 + 1 - 2)j + (4 + 2 + 4)k

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A 45.0 g hard-boiled egg moves on the end of a spring with force constant 25.0 N/m. Its initial displacement 0.500 m. A damping
leva [86]

Answer:

0.02896 kg/s

Explanation:

A_1 = Initial displacement = 0.5 m

A21 = Final displacement = 0.1 m

t = Time taken = 0.5 s

m = Mass of object = 45 g

Displacement is given by

x=Ae^{-\dfrac{b}{2m}t}cos(\omega t+\phi)

At maximum displacement

cos(\omega t+\phi)=1

\\\Rightarrow A_2=A_1e^{-\dfrac{b}{2m}t}\\\Rightarrow \dfrac{A_1}{A_2}=e^{\dfrac{b}{2m}t}\\\Rightarrow ln\dfrac{A_1}{A_2}=\dfrac{b}{2m}t\\\Rightarrow b=\dfrac{2m}{t}\times ln\dfrac{A_1}{A_2}\\\Rightarrow b=\dfrac{2\times 0.045}{5}\times ln\dfrac{0.5}{0.1}\\\Rightarrow b=0.02896\ kg/s

The magnitude of the damping coefficient is 0.02896 kg/s

6 0
4 years ago
Decribe what makes a diamand a mineral
RUDIKE [14]
Very very very high pressures, very etc high temperatures, varying degrees of "carbon purity"  and a long time make diamonds diamonds. Minerals ? Well, every so often, should you be lucky, or live in South Africa you might come across one. (Let me know if you do).
7 0
3 years ago
Help awnser physics​
kirill115 [55]

Answer:

there I think the answer is measuring tape we cannot use a metre rule because it measures straight lines and I think measuring tape is better because it is flexible thus makes measurement easier

3 0
4 years ago
Who created the theory of general relativity?
pantera1 [17]
Who created the theory of general relativity?:

The answer would be: Albert Einstein.

Albert Einstein developed the general relativity theory (gravitation). 

The year he developed the general relativity theory or (GR) was back in 1907 and 1915. Then many other contributions after 1915.

Thanks,

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7 0
4 years ago
Read 2 more answers
a satellite is traveling in a orbit around the earth. what change would cause it to experience more gravitational force from the
never [62]
The correct answer is:
<span>A. orbiting closer to the earths surface. 

In fact, the gravitational force exerted by the Earth on the satellite is
</span>F=G \frac{Mm}{r^2}
<span>where
G is the gravitational constant
M is the Earth mass
m is the satellite mass
r is the distance of the satellite from the Earth's surface

We can see that, if the satellite orbits closer to the Earth's surface, its distance r from the centre of the planet decreases. But when r decreases, F (the gravitational force) increases, so A is the correct answer.</span>
7 0
3 years ago
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