An atom moving in 1 dimension has an initial velocity of vo = -3.00 [m/s]î and constant acceleration of a = -0.500 [m/s²]î . Which of the following statements is/are true? 1. After t = 2 seconds, the particle will be located 7 meters to the left of its initial position. 2. The particle is initially moving to the left. 3. The particle is slowing down. A. 1 only В. 2 only C. 1 and 2 only D. 1, 2, 3
Stellar evolution
We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.
Red Shift
It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.
kindly answer the three. a short explanation would do for 1 and 3 :) thank you!
![item 1:
An atom moving in 1 dimension has an initial velocity of v = -3.00 [m/s]î
and constant acceleration of a = -0.500 [m/s²]î . Which of the following
statements is/are true?
1. After t = 2 seconds, the particle will be located 7 meters to the left of its initial position.
2. The particle is initially moving to the left.
3. The particle is slowing down.
A. 1 only
B. 2 only
C. 1 and 2 only
D. 1, 2, 3
item 2:
An object slides across the floor with initial velocity of 40. [m/s]. What is its
average acceleration if it stops after 60. [s]?
A. –27 (m/s²]
B. -0.67 (m/s²]
C. 0.67 [m/s²]
D. 27 (m/s²]
item 3:
In 1.00 [min], James moved 30.0 [m], 30.9° North of West from his initial position.
What is James' average velocity?
A. v = -0.429 [m/s]î+0.257 [m/s]j
B. v = 0.429 [m/s]î – 0.257 [m/s]j
C. v = -0.257 (m/s] î+0.429[m/s]ĵ
D. v = 0.257 [m/s] î – 0.429 [m/s] j](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe2118a5c-dff8-4e55-a98e-696d722e3a42%2Fd32d955f-2e7d-4308-a85f-c306201106c0%2F8zljs49_processed.png&w=3840&q=75)
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