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irinina [24]
3 years ago
5

4. Which scientist proposed the theory that the Moon formed from fission? (5 points)

Physics
1 answer:
NeTakaya3 years ago
7 0
The answer would be B, George Darwin :)
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A cylindrical resistor of length l is made from a metal of mass m. It has a resistance R.
Vikentia [17]
C, because it has a parellell cicruit
7 0
3 years ago
A 40.0 -kg box initially at rest is pushed 5.00 m along a rough, horizontal floor with a constant applied horizontal force of 13
salantis [7]

The work done by the applied force = 650 J

Given the mass of the box = 40 kg

The displacement of the box on applying force = 5 m

Applied horizontal force = 130 N

The co-efficient of friction between box and floor is = 0.3

We have to find the work done by the applied force.

Work done by the applied force = Applied Force x Displacement of the box

                                                      = 130 N x 5 m

                                                      = 650 J

[Here the unit Nm is known as Joule(J) ]

We have the co-efficient of friction. So,

The force applied due to friction = Mass of the box x Co-efficient of friction                                                                   x Acceleration due to gravity

                                                      = 40 kg x 0.3 x 9.8

                                                      = 117.6 N

Learn more about Work done at brainly.com/question/62183

#SPJ4

6 0
1 year ago
If a→=3i^-2j^-k^ and b→=i^+4j^+k^, find a unit vector n^ normal to the plane containing a→ and b→ such that a→, b→ and n^, in th
Vladimir [108]

vector a = 3i - 2j - k and vector b = i + 4j + k, the unit vector, n, normal to the plane is (7i - j + 7k)/3√11

What is a vector?

A vector is a quantity having direction as well as magnitude.

Vectors can especially be used in determining the position of one point in space relative to another.

From the question,

The normal vector to the plane is c = a × b

we have that, a = 3i - 2j - k and b = i + 4j + k,

c = a × b

c = (3i - 2j - k) × (i + 4j + k)

= 3i × i + (- 2j) × i + (-k) × i + 3i × 4j + (- 2j) × 4j + (-k) × 4j + 3i × k + (- 2j) × k + (-k) × k

= 3i × i - 2j × i - k × i + 12i × j - 8j × j - 4k × 4j + 3i × k - 2j × k - k × k

It is known that

i × i = 0,

j × j = 0 and

k × k = 0.

we also have that

c = 3(0) - 2(-k) - (-j) + 12k - 8(0) - 16(-i) + 3(-j) - 2i - 0

c = 0 + 2k + j + 12k - 0 + 16i - 3j - 2i

c = 16i - 2i + j - 3j + 2k + 12k

c = 14i -2j + 14k

The unit vector normal to the plane n = c/ |c|

where |c| is the magnitude of c

= √(14² + (-2)² + 14²) = √(196 + 4 + 196)

= √396

= √(36 × 11)

= 6√11

we can write that n = c/|c|

= (14i -2j + 14k)/6√11

we simplify further

= 2(7i - j + 7k)/6√11

= (7i - j + 7k)/3√11

So, the unit vector normal to the plane is (7i - j + 7k)/3√11

Learn more about vectors at: brainly.com/question/25705666

#SPJ1

7 0
2 years ago
Can a blackhole be destroyed?
lilavasa [31]
Nope a black hole cannot be destroyed it can however destroy everything else
5 0
3 years ago
Read 2 more answers
A plane has a takeoff speed of 88.3 m/s and requires 1365 m to reach that speed. Determine the acceleration
Eduardwww [97]
my answer is 1276.7 because I subtracted 88.3 miles and seconds from 1365 MI
7 0
3 years ago
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