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Helga [31]
3 years ago
14

True or false velocity is the slope of the acceleration versus time graph

Physics
2 answers:
Daniel [21]3 years ago
8 0
Its true.....................
Elena-2011 [213]3 years ago
5 0

I'm pretty sure it is true. (78% sure)

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Through x rays is harmful for human health it is used in medical field why?
ipn [44]
It is strong enough to penetrate through flesh but not bone so we can see if there are fractures or breaks in our skeleton
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3 years ago
Assuming that each nucleus is roughlyspherical and that its mass is roughly equal to A (in atomic mass units {\rm u}), what is t
lara [203]

Answer:

ρ/ρ2 = 3 / R₀       the two densities are different

Explanation:

Density is defined as

       ρ = M / V

As the nucleus is spherical

       V = 4/3 π r³

Let's replace

      ρ = A / (4/3 π R₀³)

      ρ = ¾ A / π R₀³

b)

      ρ2 = F / area

The area of ​​a sphere is

     A = 4π R₀²

     ρ2 = F / 4π R₀²

     ρ2 = F / 4π R₀²

Atomic number is the number of protons in the nucleon in not very heavy nuclei. This number is equal to the number of neutrons, but changes in heavier nuclei, there are more neutrons than protons.

Let's look for the relationship of the two densities

     ρ/ρ2 = ¾ A / π R₀³ / (F / 4π R₀²)

     ρ /ρ2 = 3 (A / F) (1 / R₀)

In this case it does not say that the nucleon number is A (F = A), the relationship is

     ρ/ρ2 = 3 / R₀

I see that the two densities are different

3 0
3 years ago
(a) Calculate the buoyant force on a 2.00-L helium balloon.
iragen [17]

Answer:

0.0239364 N

0.0057879 N

Explanation:

\rho = Density of the gas

g = Acceleration due to gravity = 9.81 m/s²

V = Volume

Mass of rubber = 1.5 g

Buoyant force is given by

F_b=\rho gV\\\Rightarrow F_b=1.22\times 9.81\times 2\times 10^{-3}\\\Rightarrow F_b=0.0239364\ N

The buoyant force is 0.0239364 N

Net vertical force is given by

F_n=F_b-W_{He}-W_{r}\\\Rightarrow F_n=0.0239364-0.175\times 2\times 10^{-3}\times 9.81-1.5\times 10^{-3}\times 9.81\\\Rightarrow F_n=0.0057879\ N

The net vertical force is 0.0057879 N

6 0
3 years ago
What layer of the atmosphere is hot but does not have enough gas molecules to transfer heat to you (i.e., you would not feel the
fenix001 [56]

Answer:

thermosphere...........

7 0
2 years ago
Rodrigo wants to find more ways to improve his latest design. Which of the following should he try?
irina [24]

Answer: ask other people if they like it, or ask what they want to add

Explanation: because maybe other people can can help him improve and brainstorm with other’s.

5 0
3 years ago
Read 2 more answers
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