Why does the United States experience winter during the months of November through early March

1 answer:

8 0

The United States are entirely located in the Northern Hemisphere. It is bordering Canada on the north, and the air masses that form over it have big influence on the climate of the United States. Most of the United States falls under the influence of the air masses coming from the north, with only the southern parts of the east and west coastlines not being heavily affected. The air masses that form over Canada are cold continental air masses. They move towards south, thus toward the United States in November, quickly pushing the warmer air masses, and replacing them, bringing in cold weather conditions, which last until March.

You might be interested in

Diffusion of ions across membranes through specific ion channels is driven by ________. Group of answer choices ion concentratio

TiliK225 [7]

Answer:

The correct choice is ''ion electrochemical gradients''.

Diffusion of ions across membranes through specific ion channels is driven by ion electrochemical gradients.

Explanation:

An electrochemical gradient can be considered as that electrical (electrostatic pressure) and chemical (diffusion) force that determine the movement of molecules and ions across the membrane. This electrochemical gradient, in addition to causing movement of substances through cell membranes, is also a type of potential energy available for the performance of different cellular activities, potential energy called membrane potential.

5 0

3 years ago

Find the area of the following triangle:

Svetach [21]

Answer:it should be a right triangle because

12.5²+30²=32.5²

area of the triangle=

$\frac{1}{2} \times 30 \times 12.5 \\ 187.5 {cm}^{2}$

7 0

3 years ago

1.) What is the carbon cycle? 2.) What are the steps on photosynthesis?

galben [10]

Answer: The carbon cycle is the cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth. Steps of photosynthesis is absorption of light, electron. transport leading to the reduction, generation of ATP (adenosine triphosphate), and conversion of CO2 into carbohydrates.

Explanation:

8 0

3 years ago

Somebody help me with these 4 questions please

IgorC [24]

Answer:

i only know question 1 is convergent boundaries.

sorry i am not sure about the others

Explanation:

question 1 is convergent since they are sliding towards each other to form the subduction zone

5 0

3 years ago

Using the sliding flament theory, explain (or draw) the process of sarcomere shortening. Start from the point where calcium woul

Arte-miy333 [17]

Answer:

Calcium binds to troponin C
Troponin T moves tropomyosin and unblocks the binding sites
Myosin heads join to the actin forming cross-bridges
ATP turns into ADP and inorganic phosphate and releases energy
The energy is used to impulse myofilaments slide producing a power stroke
ADP is released and a new ATP joins the myosin heads and breaks the bindings to the actin filament
ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, starting a new cycle
Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

Explanation:

In rest, the tropomyosin inhibits the attraction strengths between myosin and actin filaments. Contraction initiates when an action potential depolarizes the inner portion of the muscle fiber. Calcium channels activate in the T tubules membrane, releasing calcium into the sarcolemma. At this point, tropomyosin is obstructing binding sites for myosin on the thin filament. When calcium binds to troponin C, troponin T alters the tropomyosin position by moving it and unblocking the binding sites. Myosin heads join to the uncovered actin-binding points forming cross-bridges, and while doing so, ATP turns into ADP and inorganic phosphate, which is released. Myofilaments slide impulsed by chemical energy collected in myosin heads, producing a power stroke. The power stroke initiates when the myosin cross-bridge binds to actin. As they slide, ADP molecules are released. A new ATP links to myosin heads and breaks the bindings to the actin filament. Then ATP splits into ADP and phosphate, and the energy produced is accumulated in the myosin heads, which starts a new binding cycle to actin. Finally, Z-bands are pulled toward each other, shortening the sarcomere and the I-band, producing muscle fiber contraction.

4 0

2 years ago