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ohaa [14]
3 years ago
5

Which makes better packing material :a high density or density material? Why

Physics
2 answers:
spin [16.1K]3 years ago
6 0
When density is high, it is harder to carry.
Korvikt [17]3 years ago
3 0
High density because it is obvious it will be hard to rip and tear.
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Ask Your Teacher A flight attendant pulls her 69 N flight bag a distance of 268 m along a level airport floor at a constant velo
Simora [160]

Answer:

a)  W = 5360 J  b)  μ = 0.29

Explanation:

a) The work is, bold indicate vectors

         W = F. d ​​= F d cos T

         W = 40 268 cos 60

         W = 5360 J

b) The force of friction and opposes the movement of the body and if the speed of the body is constant implies that the external force in the direction of the movement is equal to the force of friction, or which work is the same

         W_{fr} = -5360J

The negative sign is because the force of friction is contrary to the direction of movement

c) Let's write the work of the friction force

           W_{fr} = fr d cos 180

           fr = μ N

Since the body is on a horizontal surface, from Newton's second law on the Y axis

          N-W = 0

          N = W

          fr = μ W

         W_{fr} = - μ W d

         μ = - W_{fr} / W d

         μ = - (-5360) / 69 268

         μ = 0.29

7 0
3 years ago
Suppose these waves represent the sound of a siren on a passing ambulance. Which wave represents the sound of the siren after it
sergeinik [125]
The answer is wave B has a lower frequency.  Suppose these waves represent the sound of a siren on a passing ambulance. Wave B (lower frequency) represents the sound of the siren after it has passed you.  The ambulance moving towards the observer produces a higher than normal frequency, and the ambulance moving away produces a lower than normal frequency.
4 0
3 years ago
Read 2 more answers
What is question 10—20 PTS!!
Galina-37 [17]
If my math is correct your answer should be 3.0 but correct me if I'm wrong
8 0
3 years ago
A spherical balloon has a radius of 8.35 m and is filled with helium. how large a cargo can it lift, assuming that the skin and
rusak2 [61]

Assuming that the densities of the gases are:

density of air, ρ1 = 1.29 kg / m^3

density of helium, ρ2 = 0.179 kg / m^3

 

Since buoyant force and weight are two forces that are in opposite direction (buoyant force is up while weight is down), therefore equate the two:

buoyant force = weight

m g = (800 + m1) g

where m is the mass of buoyancy, g is gravity and m1 is the maximum mass of the cargo

m = 800 + m1

 

We know that mass is also expressed as:

m = ρ V

where ρ is density of gas and V is volume of the sphere

Since there are two interacting gases here, therefore m is:

m = (ρ1 – ρ2) V

 

Therefore:

(ρ1 – ρ2) V = 800 + m1

(1.29 – 0.179) (4π/3) (8.35m)^3 = 800 + m1

2709.33 = 800 + m1

m1 = 1,909.33 kg

7 0
3 years ago
Select the correct answer.
yKpoI14uk [10]

Answer:

Looks like <em>Trigonal Planar</em>

Explanation:

There are only 3 areas of electron density and no unpaired electrons on the central atom, which indicates trigonal planar.  This image might help...

7 0
2 years ago
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