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Scorpion4ik [409]
3 years ago
5

If a laser beam is shot straight up from the bottom of a pool so that it intersects the pools surface in a perpendicular fashion

, what will the angle of refraction be in the air?
A) 0
B)45
C)90
D)This cannot ve measured
Physics
1 answer:
Nat2105 [25]3 years ago
6 0

A. the change in medium cannot affect the angle if the angle is perpendicular.

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What does each system help you do?
Maru [420]

Explanation:

1.The somatic nervous system is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles. 

2. The autonomic nervous system is a control system that acts largely unconsciously and regulates bodily functions, such as the heart rate, digestion, respiratory rate, pupillary response, urination, ect...

3. Sympathetic Division is a term used by researchers and medical practitioners to describe the subdivision of the autonomic nervous system (that controls involuntary and automatic physical reactions) that responds to emergency situations by mobilizing and controlling the energy necessary to cope with the situation.

4. The part of the autonomic nervous system that tends to act in opposition to the sympathetic nervous system, as by slowing down the heart and dilating the blood vessels. It also regulates the function of many glands, such as those that produce tears and saliva.

5. a regulatory substance produced in an organism and transported in tissue fluids such as blood or sap to stimulate specific cells or tissues into action.

7 0
3 years ago
Determina el volumen de 450 g de alcohol
Rufina [12.5K]

Luego de utilizar la fórmula del volumen de un líquido encontramos que si el acohol tiene 450 gramos entonces su volumen es de

La fórmula del volumen de la densidad de un líquido es la siguiente:

Densidad= Masa / Volumen

Volumen =Masa / Densidad

Es conocido que la densidad del alcohol es 789 kg/m³, y como sabemos por dato que tiene 450gr el siguiente paso es la sustitución:

Volumen=0.45/ 789

Volumen = 0,00057 m³    

6 0
2 years ago
Bob is pulling a 30 kg filing cabinet with a force of 200 N , but the filing cabinet refuses to move. The coefficient of static
Arada [10]

Answer:

<em>Magnitude of the Frictional force is 200 N</em>

Explanation:

The frictional force is the force that tries to oppose relative motion between two surfaces that are contacting. The coefficient of static friction is the coefficient of friction of a body that is not moving.

Newton's third law of motion states that action and reaction forces are equal and opposite. So the frictional force felt on the filing cabinet will be equal to the applied force pulling the cabinet.

Frictional force = Force applied

Force applied  = 200 N

Therefore, the magnitude of the friction force on the filing cabinet is 200 N

5 0
3 years ago
A chemist needs 15.0 grams of ethanol for a reaction. If the density of ethanol is 0.789 g/ml, how many milliliters of alcohol s
harina [27]
  • Mass=15g
  • Density=0.789g/ml

\\ \bull\tt\dashrightarrow Density=\dfrac{Mass}{Volume}

\\ \bull\tt\dashrightarrow Volume=\dfrac{Mass}{Density}

\\ \bull\tt\dashrightarrow Volume=\dfrac{15}{0.789}

\\ \bull\tt\dashrightarrow Volume=19.01mL

3 0
2 years ago
10 points please somebody help me
Anuta_ua [19.1K]
It is the first one?
7 0
3 years ago
Read 2 more answers
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