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lesantik [10]
3 years ago
5

The earth rotates once per day about an axis passing through the north and south poles. True or False

Physics
1 answer:
alexandr402 [8]3 years ago
5 0

Answer: False.

Explanation: The Earth rotates once per day in direction from East to West. The rotation of the Earth daily is responsible for day and night experienced, the areas of the Earth facing the Sun experiences day time while the areas of the Earth away from the Sun in the Earth's shadow experiences night time.

While the revolution of the Earth around the gives rise to a year, as it takes 365 days for the Earth to go round the sun.

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Which uses direct current?
Kipish [7]

Answer:

Direct current is used in any electronic device with a battery for a power source. It is also used to charge batteries, so rechargeable devices like laptops and cell phones

Explanation:

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3 years ago
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A force of 10.0 newtons acts at an angle 20.0 degrees from vertical. What are the horizontal and vertical components of the forc
erik [133]
Horizontal component = (10N) · sin (20°) =  3.42... N  (rounded)

Vertical component = (10N) · cos (20°) =  9.39... N   (rounded)
8 0
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A container contains 200g of water at initial temperature of 30°C. An iron nail of mass 200g at temperature of 50°C is immersed
d1i1m1o1n [39]

Answer:

Assuming there is no heat loss to the surrounding.

Heat lost by iron equals heat gained by water.

0.2(450)(50-x)=0.2(4200)(x-30)

x=31.94 °C

Explanation:

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3 years ago
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A physical science test book has a mass of 2.2kg. . What is the weight on the earth
dem82 [27]
Weight = mg,          g ≈ 9.8 m/s²

Weight = 2.2 * 9.8 ≈ 21.56 N
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3 years ago
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A cylindrical rod of copper (E = 110 GPa, 16 × 106 psi) having a yield strength of 240 MPa (35,000 psi) is to be subjected to a
Fynjy0 [20]

Answer:

d= 7.32 mm

Explanation:

Given that

E= 110 GPa

σ = 240 MPa

P= 6640 N

L= 370 mm

ΔL = 0.53

Area A= πr²

We know that  elongation due to load given as

\Delta L=\dfrac{PL}{AE}

A=\dfrac{PL}{\Delta LE}

A=\dfrac{6640\times 370}{0.53\times 110\times 10^3}

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πr² = 42.14 mm²

r=3.66 mm

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3 years ago
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