Which answer best describes Earth's atmosphere
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How can working together help scientist achieve their goals?
A teacher listed the following two processes.• Process 1: water changing to ice in a refrigerator • Process 2: steam coming out of a kettle filled with hot of water Which table correctly identifies the change of state taking place in each example? A) Process Phase Change 1 Liquid to gas 2 Liquid to gas B) Process Phase Change 1 Liquid to gas 2 Liquid to solid C) Process Phase Change 1 Liquid to gas 2 Gas to Liquid D) Process Phase Change 1 Liquid to solid 2 Liquid to gas
Which could be the factor that remains at the same phases of an experiment?A: observations B:scienceC: scientific methodsD: technology E: controlled variables
How is a time interval different from a specific time?
Select all that apply.
A
Water would be a gas at room temperature,
B
Water would boil at 100 degrees Celsius.
C
Water would form droplets.
D
ice would sink.
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Answer:
A. Water would be a gas at room temperature, and
D. Ice would sink in water.
Explanation:
There are three types of intermolecular forces: London dispersion forces, dipole-dipole interactions, and hydrogen bonds. The relative strength of these forces depend on the size of the molecule. However, for small molecules like water (three atoms per molecule,) hydrogen bonds would be much stronger than the other two types of forces.
Without hydrogen bonds, water molecules would be held together only with dipole-dipole interactions and London dispersion forces. To get an idea of what that would be like, consider hydrochloric acid .
and water
contain about the same number of electrons. The H-Cl bond in
is polar, which allows for dipole-dipole interactions. However, only H-O, H-F, and H-N bonds allow for hydrogen bonding. As a result, there won't be any hydrogen bonding between
molecules. Without hydrogen bonding,
boils at well below
under standard pressure. It is a gas at room temperature under standard pressure. That's about the same as what water molecules would behave (physically) without any hydrogen bonds between them.
Also because of hydrogen bonding, the density of ice (solid ) is typically greater than that of water (liquid
.) When compared to water in its liquid state, there are more hydrogen bondings between molecules of water in its solid state. The hydrogen bonds hold the molecules together to form a lattice. Because of this structure due to hydrogen bondings, the molecules are farther apart than they are in the liquid states. As a result, the density of ice is typically smaller than that of water. That would likely not be the case if there was no hydrogen bondings between water molecules.
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m = 1kg, v = 30m/s
Kinetic Energy = (1/2) * 1 * 30 * 30 = 450 J
Answer: 450 J
Explanation:
Kinetic Energy = 1/2 × mass × velocity²
Kinetic Energy = 1/2 × 1.0 Kg × 30 m/s²
Kinetic Energy = 1/2 × 1.0 Kg × 900
Kinetic Energy = 450 J
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The mechanical advantage of a ramp that is 6.0 m long and 1.5 m tall. we can easily take any object to height of 6 m.
What is gravitational Potential Energy ?
Gravitational potential energy is an energy acquired by an object due to a change in its height when it is present in a gravitationalfield. It is denoted by P or U. and it its expressed in joule. Gravitational potential energy is given by U = mgh where m is the mass of the object, g is acceleration due to gravity and h is the height.
when we take an object of mass m to a certain height in the field of gravitation, we can say that body has potential energy and we release that body from that height, it falls.
Ramp of 6.0 m long and 1.5 m tall is that there will be angle made by the inclination is 14.4°. Mechanical advantage of a ramp is, it is used for transportation of heavy objects to a certain height at certain distance. It reduces physical efforts and make our task faster. when we have to transport lots of object to a certain height, when we put objects on the ramp which has motor and upper part of the belt rotates, it will easily get transported to that height without physical efforts. Escalator is also a type ramp. Ramp which has no rotator, we have to push objects on the ramp to that height.
Hence these are advantages of a ramp.
To know more about Ramp, click :
#SPJ3.
Answer: 4.0
Explanation:
Light travels faster than sound.
Thunderstorms are most common during the summer.
all of the above
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Answer:both of them are true
Explanation:please thank me and write me with 5 stars please and thank you
Answer:
both are true
Explanation:
thunder: when air molecules are heated, they expand. Sound waves move faster in warm air than they do in cool air. and The speed of light as it travels through air is much faster than that of sound.
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