Which of the following statements is true about "speed" and "acceleration"?A. When an object has acceleration, its velocity may increase or decrease gradually.
B. When the acceleration of the object is zero, its velocity is also zero.
C. The direction of object velocity is not necessarily the same as that of acceleration.
D. When the object is vertically thrown up to the highest point, the speed and acceleration are zero.
E. When the object is free-falling, the displacement and acceleration direction are the same.

Answers

Answer 1

Answer:

Answer:

Explanation:

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In electrical work, resistance is often represented by thea. Greek symbol O. c. letter V. b. letter I. d. letter E.
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Condensation nuclei are particles of atmospheric dust around wich______.A.cloud droplets form
B. Ozone collects
C. Evaporation occurs
D.winds form

Answers

A! If you think of droplets as cells then it makes a lot more sense that it would be called a condensation nuclei

Final answer:

Condensation nuclei are small particles in the atmosphere where water vapor condenses to form cloud droplets, making option A the correct answer. They are essential for cloud formation.

Explanation:

Condensation nuclei refer to small particles typically present in the atmosphere, on which water vapor can condense to form cloud droplets.

This means option A is the correct answer.

These nuclei can be composed of various substances like dust, volcanic ash, sea salt, etc. They are crucial for cloud formation, and without them, water vapor would need to supercool to a very low temperature before it could form droplets.

Learn more about Condensation nuclei here:

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What does the doppler effect indicate about the motion of galaxies?

Answers

When galaxies move farther away the wavelength of the light is longer causing the galaxy to shift red but if it moves closer, the wavelength of the light gets smaller causing the galaxy to blue shift. The reason that the wavelength increases or decrease is due to the doppler effect.

1. The photon energy for light of wavelength 500 nm is approximately (Show your work).1.77 eV
3.10 eV
6.20 eV
2.48 eV
5.46 eV

2. Which of the following colors is associated with the lowest temperature? Explain your reasoning.
A. Blue
B. Green
C. Yellow
D. Red

3. Which of the following colors has the highest photon energy?
A. Blue
B. Green
C. Yellow
D. Red
Explain your reasoning.

Answers

1)
E=hf=h*c/α
E=6.626*10^-34*3*10^8E=

A ball rolls along the floor with a constant velocity of 6 m/s. How far will it have gone after 50 seconds?

Answers

Answer:

300 m

Explanation:

The ball moves with constant velocity, so the distance it covers is given by:

$d=vt$

where

v=6 m/s is the ball's velocity

t=50 s is the time

Substituting these numbers into the equation, we find

$d=(6 m/s)(50 s)=300 m$

6 m/s * 50s = 300 m assuming no friction or air resistance

A quarter is 2.4 millimeters thick. How tall are the following stacks of quarters?a. A stack worth 50 cents
b. A stack worth $1
c. A stack worth $5
d. A stack worth $1,000
(Give your answer in millimeters and meters.)

Answers

A. 4.8 millimeters
B. 9.6 millimeters
C. 48 millimeters
D. 9,600 millimeters or 9.6 meters
There are 1000 mm in a meter

Tony walks at an average speed of 70 m/min from his home toschool. If the distance between his home and the school is
2100 m, how much time does it take for Tony to walk to
school?
min

Answers

Answer:

The answer is 30 min

Explanation:

t = s/v

v = 70 m/min, s = 2100 m

t = 2100/70 = 30 min.

Hope it helps you! ＼(^ᴥ^)／

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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).

Which type of star has the widest range in brightness and surface temperature?a. giantb. white dwarfc. neutrond. main sequence