The temperature on the moon is

2 answers:

7 0

When the sun shines, it illuminates only one part of the moon. The article states, "<span>Daytime on one side of the moon lasts about 13 and a half days, followed by 13 and a half nights of darkness. When sunlight hits the moon's surface, the temperature can reach 253 degrees F (123 C). The "dark side of the moon" can have temperatures dipping to minus 243 F (minus 153 C).</span><span>Oct 22, 2012". Therefore, b is correct</span>

Nuetrik [128]2 years ago

4 0

B.

It can go from very hot to very cold, it depends on the area of the moon and where the sunlight hits.

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2 masses of 4kg and 2.5kg have a separation of r =1.5m. Calculate the force of gravitational attraction between them (take g as

Evgesh-ka [11]

Answer:

F = 29.64 × 10-¹¹N

Explanation:

From newton's law of gravitation which states that every object in the universe will attract each other with a force which is directly proportional to the product of their masses and inversely proportional to the square of their distance apart.

That is, F = (Gm1m2)/ r²

From the question m1=4kg, m2 = 2.5kg, r= 1.5m,G = 6.67×10-¹¹

F=( 6.67×10-¹¹ × 4 × 2.5) / 1.5²

F = (66.7×10-¹¹) / 2.25

F = 66.7/2.25 × 10-¹¹ N

F = 29.64 × 10-¹¹N

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2 years ago

Nabil wants to work out the density of a pebble. he has a displacement can and a beaker. What other piece of equipment will he n

Svetllana [295]

Answer:

1) Measuring cylinder

2) Top Pan Balance

Explanation:

To find the density of the pebble Nabil should first accurately measure the mass of the pebble using the top pan balance

He should then fill the displacement can till the water reaches the outlet pipe at the to of the cylinder

He should then place the pebble into the cylinder carefully ans allow the water that would start coming out to stop

The volume of water in the displaced cylinder is then measured and the density is found by dividing the mass of the pebble by the volume of water in the measuring cylinder

$Density \ of \ pebble = \dfrac{Pebble \ mass}{Volume \ of \ water \ in\ the \ measuring \ cylinder} = \dfrac{Pebble \ mass}{Water \ volume \ displaced}$

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2 years ago

Two trains, each having a speed of s, are headed at each other on the same straight track. A bird that can fly at speed 2s flies

juin [17]

Answer:

The total distance the bird travels is d.

Explanation:

Each train travels at the speed s. They will meet at the center, a distance d/2 (which is where the bird might be crushed). Each train travels the same distance d/2 in a time t which is also equal for both. This is also the time the bird spends travelling between them.

For any of the train, the time t is the distance divided by the speed.

$t = \dfrac{d/2}{s} = \dfrac{d}{2s}$