1. The surface tension in a cup of water is caused by _____. (1 point)attractive forces between the water and its container
attractive forces between water molecules
adhesive forces between water molecules
adhesive forces between the water and its container
2. Which of these objects is least like a crystalline solid? (1 point)a pillowcase full of Halloween candy
a spider web
a checkerboard
a chain-link fence
3. An amorphous solid _____. (1 point)flows freely at any temperature
has no true melting point
has a repeating unit structure
becomes less viscous as it cools
c,a,
on 3, a is nuts, c is nuttier, d is exactly wrong, so b is the best answer. I object strongly to the word "true", if it were "exact definite melting point" I would be a happy camper.
thanks
B
A
B
Just took the test
I love how there an advertisment for connections academy on the side of this xD lmao
@n/a Lol, how ironic right? xD
b.a.b
i have corrected my hw,so i can assure u its all correct!
2.) B
3.) D
1. The surface tension in a cup of water is caused by attractive forces between water molecules. To understand this, we can observe that water molecules are polar, meaning they have a positive and negative end. These polar molecules are attracted to each other through intermolecular forces, specifically hydrogen bonding. These attractive forces between water molecules at the surface of the water create a "skin" or tension that resists external forces and gives rise to surface tension.
2. The object least like a crystalline solid is a spider web. A crystalline solid is characterized by a regular and repeating arrangement of its constituent particles, such as atoms, ions, or molecules. In a crystalline solid, these particles are arranged in a highly organized and orderly manner, creating a well-defined crystal lattice structure. The other objects mentioned, a pillowcase full of Halloween candy, a checkerboard, and a chain-link fence, do not possess such a repeating and regular pattern and are therefore less like a crystalline solid.
3. An amorphous solid has no true melting point. Unlike crystalline solids where the particles have a well-defined arrangement, amorphous solids lack long-range order in their atomic or molecular structure. This lack of order makes it difficult to determine a distinct melting point for amorphous solids, as their particles do not align and rearrange in a regular manner during melting. Instead, amorphous solids tend to soften and gradually transition into a more liquid-like state over a broad temperature range, without a sharp melting point.