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Scrat [10]
3 years ago
15

When are children MOST likely to begin using words to express meaning? A. before 12 months B. between 12 and 18 months C. betwee

n 18 months and 2 years D. between 2 and 3 years
Physics
2 answers:
lubasha [3.4K]3 years ago
7 0

Answer:

B. Between 12 and 18 months

Explanation:

I hope this helped!

disa [49]3 years ago
7 0
Answer: B. Between 12 and 18 months
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Which statement(s) correctly compare the masses of protons, neutrons, and electrons?
Ostrovityanka [42]
Electron<span>. the central part of an atom containing </span>protons<span> and </span>neutrons<span> ... which of the following is necessary to calculate the atomic </span>mass<span> of an element? ... which of the </span>statements correctly compares<span>the relative size of an ion to its neutral atom?</span>
3 0
3 years ago
If a 1000-pound capsule weighs only 165 pounds on the moon, how much work is done in propelling this capsule out of the moon's g
Bas_tet [7]

Answer:

  W = 1,307 10⁶ J

Explanation:

Work is the product of force by distance, in this case it is the force of gravitational attraction between the moon (M) and the capsule (m₁)

              F = G m₁ M / r²

              W = ∫ F. dr

              W = G m₁ M ∫ dr / r²

we integrate

             W = G m₁ M (-1 / r)

                 

We evaluate between the limits, lower r = R_ Moon and r = ∞

           W = -G m₁ M (1 /∞ - 1 / R_moon)

            W = G m1 M / r_moon

Body weight is

             W = mg

             m = W / g

The mass is constant, so we can find it with the initial data

For the capsule

            m = 1000/32 = 165 / g_moon

            g_moom = 165 32/1000

            .g_moon = 5.28 ft / s²

I think it is easier to follow the exercise in SI system  

           W_capsule = 1000 pound (1 kg / 2.20 pounds)

           W_capsule = 454 N

           W = m_capsule g

           m_capsule = W / g

           m = 454 /9.8

           m_capsule = 46,327 kg

Let's calculate

          W = 6.67 10⁻¹¹ 46,327   7.36 10²² / 1.74 10⁶

          W = 1,307 10⁶ J

7 0
3 years ago
Make the following conversion. 120 mL = _____ cm³ 12.0 1200 120 1.20
omeli [17]
120 is your answer. 120 mL = 120 cm^3
7 0
3 years ago
Read 2 more answers
According to the table what was the hikers total displacement the graph has 4km 6km 4km 6km
Xelga [282]

Answer:

0

Explanation:

0 is the answer

6 0
3 years ago
Your oven has a power rating of 5000 watts. How many kilowatts is this ?
Gekata [30.6K]

1,000 watts = 1 kilowatt
2,000 watts = 2 kilowatts
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<em>5,000 watts = 5 kilowatts</em>

8 0
3 years ago
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