PHYSICS HIGH SCHOOL

What color do you think an object would be if it reflected all colors of the visible spectrum? A.The object would be black.


B.The object would be yellow.


C.The object would be white.


D.The object would be blue.

Answers

Answer 1
Answer: c) The object would be WHITE.

We call "white light" to the sunlight, but referred to the visible part of spectrum. If the object reflects all the light, it appears as a white object.

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Sound waves travel faster in: a. solids as compared to liquids. b. liquids as compared to gases. c. warm air as compared to cooler air. d. All of the above are correct.

Answers

Answer:

d all of the above are correct

When a sound source is moving toward the observer, the observer will hear a higher pitch. This is due toa. a decrease in the amplitude of the sound wave.
b. a decrease in the frequency of the sound wave.
c. an increase in the frequency of the sound wave.
d. an increase in the amplitude of the sound wave.

Answers

number one a and b are automatically out if you decrease the pitch or frequency you wont hear it louder it does not add up ok?
number 2 the answer would be C the higher the frequency the higher the pitch the lower the frequency the lower the pitch this just comes back to common sense. for example you cant decrease the frequency and than expect a louder pitch its like saying I am going to smash the key on this piano with all my strength and it will make a small very low pitch sound you get what I mean so your answer would indeed be C.

You are asked to contemplate the concepts of oscillation and periodic motion (or periodic behavior). These lead to the definition of a special kind of periodic motion called simple harmonic motion. For now, let's just think about periodicity (1) and oscillations for the following two scenarios. Your answers will not be marked for correctness. Scenario 1: The motion of the second hand on a clock is:_______
a. periodic but not oscillatory (I.e. the hand does not oscillate or undergo oscillations).
b. periodic and also oscillatory.
c. not periodic and not oscillatory.
d. oscillatory but not periodic.
Scenario 2: The motion of a person rocking back and forth on a rocking chair to the beat of a song is:_______
a. periodic but not oscillatory.
b. periodic and also oscillatory.
c. not periodic and not oscillatory.
d. oscillatory but not periodic.
Please explain why your answers for the two scenarios are either the same or different. Your answer should include brief definitions of periodic and oscillatory (or oscillations).

Answers

Answer:

The correct answers are

a. periodic but not oscillatory (I.e. the hand does not oscillate or undergo oscillations).

b. periodic and also oscillatory.

Explanation:

Oscillatory motion are motion that involves the repeated forward and backward motion of an object or mater between two position, points or states. An oscillatory motion that repeats itself at a regular interval or cycle is a periodic oscillatory motion. Examples of periodic oscillatory motion includes, a pendulum, the upward and downward motion of a weighted spring or a sine wave

while periodic motion is the repeated movement of an object over a specific period of time. The period is the time for the motion to repeat itself measure in seconds.

The motion of the hand of the clock is periodic as it revolves round every minute, but it is in a clockwise direction hence it is not oscillatory

while the motion f a person rocking back and forth on a rocking chair to the beat of a song is periodic and oscillatory

What does it mean for an atom to be electronegative? How does this affect the shape and overall charge of a water molecule?

Answers

Answer:

Electro-negativity is the tendency of an atom to attract the shared pair of electron in a covalent bonding while forming a molecule.

Explanation:

In a covalent bonding the atoms share the electrons mutually without actually transferring it to one of the atom to gain a stable configuration. In such a case when one atom is more electro-negative than the other then the shared pair of electron gets slightly shifted towards the more electro-negative developing a denser cloud of electrons near the nucleus of that atom which we denote as partial negative (-\delta) in the superscript.

In water molecules we have a similar case where the oxygen atom is more eletro-negative (value=3.44) than the hydrogen atom (value=2.2). This leads to a higher electron density near the oxygen atom.  A part from the shared pairs, the oxygen atom also possesses 2 lone pairs of electrons which tend tp makethe shape a tetrahedron in a 3D structure. This results in molecular shape being bent with an H-O-H angle of 104.5°.

What is the average speed in miles per hour of the car that traveled a total of 200 miles in 5.5 hours

Answers

Answer:

Average speed of the car is 36.36 miles per hour

Explanation:

It is given that,

Total distance traveled by the car, d = 200 miles

Total time taken, t = 5.5 hours

In this case, we have to find the average speed of the car. Average speed of the car is defined as the total distance divided by total time taken. Mathematically, it can be written as :

s=(d)/(t)

s=(200\ miles)/(5.5\ hours)    

s = 36.36 miles per hour

Hence, the average speed of the car is 36.36 miles per hour.                                 

The expiration date on a product refers to the last date a product should be __________.

Answers

It refers to the date where a product should no longer be eaten and isn't fresh enough

The expiration date on a product refers to the last date a product should be used


or should be costumed by


I hope that's help !
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