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2 years ago

Why does sand feel hot under your feet on a sunny day at the beach?

Physics

2 answers:

zaharov [31]2 years ago

6 0

Answer:

At a sunny day at the beach, the top of the sand is warm. The radiation from the Sun heats up the surface of the sand, but sand has a low thermal conductivity, so this energy stays at the surface of the sand.

vfiekz [6]2 years ago

4 0

Answer:

<h3>Hope this helps!</h3><h2>Mark me as brainliest!</h2>

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2 years ago

Describe the Pascal's principles

boyakko [2]

Explanation:

Pascal's principle, also called Pascal's law, in fluid (gas or liquid) mechanics, statement that, in a fluid at rest in a closed container, a pressure change in one part is transmitted without loss to every portion of the fluid and to the walls of the container.

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2 years ago

Magnets attract objects made up of _______;_______and _______

mixas84 [53]

I think metal, steel and copper.

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1 year ago

Which statement accurately describes impulse? State corrrect ans

ser-zykov [4K]

Where are the statements at ?

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3 years ago

A spherical hot air balloon of diameter 30.0 meters just floats (hovers) when the hot air inside has been heated to a density of

Rom4ik [11]

Answer:

W = 166422.729 N

Explanation:

given,

diameter of the balloon = 30 m

density of the air = 1.10 Kg/m³

weight of the balloon and cargo = ?

density of the surrounding air = 1.20 kg/m³

we know,

Density = mass/volume

m = density x volume

$m = \rho\times \dfrac{4}{3}\pi r^3$

$m =1.20 \times \dfrac{4}{3}\pi\times 15^3$

m = 16964.6 Kg

Weight of the balloon

W = m g

W = 16964.6 x 9.81

W = 166422.729 N

Weight of the balloon and the cargo is equal to W = 166422.729 N

5 0

2 years ago