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Rom4ik [11]
3 years ago
14

A cupboard is placed in front of a heater. Air can move through a gap under the cupboard.

Physics
1 answer:
expeople1 [14]3 years ago
7 0

Answer:

B

Explanation:

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Four weather satellites are orbiting the Earth at a height of 825 kilometers. Some characteristics of the satellites are shown i
ratelena [41]

Answer:

D

Explanation:

The gravitational force between any two objects is affected by the masses of the objects and the distance between them. The greater the masses of the objects are, the stronger the gravitational force is.

Since all four of the satellites are the same distance from the Earth's surface, only their masses affect the strength of the gravitational force. At 903 kilograms, satellite D has the greatest mass, so the gravitational force pulling it toward the Earth is the greatest.

4 0
3 years ago
Which contributes to the lack of evidence of the Period of Heavy Bombardment on Earth? A. Earth's volcanoes B. Earth's magnetic
RUDIKE [14]
The correct answer to this would be letter:  

A. Earth’s volcanoes

Together with weathering and plate tectonic movements, Earth’s volcanic eruptions and emission of lava has destroyed/covered many of the craters which were created on Earth during the Period of Heavy Bombardment.

3 0
3 years ago
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An aluminium bar 600mm long, with diameter 40mm, has a hole drilled in the center of the bar. The hole is 30mm in diameter and i
arsen [322]

Answer:

Explanation:

l = 600mm = 0.6m

d = 40mm = 0.04m

hd = 30mm = 0.03m (diameter of the hole)

hl = 100mm = 0.1m (hole length)

modulus of elasticity for the aluminium = 85GN/m2

compressive load = 180kN

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For which medical procedure would Doppler ultrasound be most useful?
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The answer is d.

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What's the concept of mass ?
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Masa is a concept that identifies that magnitude of a physical nature that allows indicating the amount of matter in a body. Within the International System , its unit is the kilogram ( kg . ) 
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