A kid on a playground swing makes 6 complete to-and-fro swings each 30 seconds

Answers

Answer 1

Answer: i assume that you want to find out what's the frequency is.

Number of oscillation = 6 which being done in 30 second.

which means the time period for 1 oscillation is 30 second/6 = 5 second

Frequency = 1/time period
= 1/5 Hertz

Hope this help

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What 2 characteristics of stars are shown in an H-R diagram?

Answers

2 characteristics of stars are shown in an H-R diagram is Size and Color.

Which of the following questions best highlights a shortcoming of the big bang theory? A. How could energy become the matter present today?
B. What makes people think that the universe started from a single point?
C. How can all galaxies be moving away from Earth?
D. What was the cause of the big bang?

Answers

A. How could energy become the matter present today?

Answer:

What was the cause of the big bang theory?

Explanation:

What makes dark energy "dark"?A. its unknown nature
B. its completely black color
C. its existence beyond the visible spectrum
D. its inevitable creation of a totally destructive Big Crunch

Nucleosynthesis began when _____ and ended when _____.
A. the Big Bang occurred; the Big Crunch occurred
B. nuclear reactions could first occur; matter had condensed into galaxies and stars
C. the cosmic microwave background radiation formed; dark energy replaced it as the dominant energy form
D. the universe had cooled enough for atoms to combine; protons and neutrons were too far apart to form nuclei

Answers

Dark energy makes "dark" the answer is option A. its unknown nature.

Nucleosynthesis began when the answer is option D. the universe had cooled enough for atoms to combine an ended when the answer is option D. protons and neutrons were too far apart to form nuclei.

The particles of a solid are linked together in a network. if the temperature of the solid increases, the particles gain energy. if they gain enough energy, the particles can break free of the network. then, they are able to move around more freely.in the event described above, what kind of change is taking place?

Answers

This is a physical change at the the melting point where the phase changes from solid to liquid.

Why are the vector quantities magnitude and direction

Answers

Because color, cost, temperature, weight, and age
don't tell you enough about the motion.

Because, by definition, a vector has to have magnitude and direction. Otherwise, it's not a vector. If it only has magnitude, then it's a scalar, not a vector. Does that help at all?

A train leaves the station at the 0.0m marker traveling with a constant velocity of 45.0 m/s. How manyseconds later will the train pass the 1500.Om marker? What is the velocity of the train in km/h?

Answers

The train will pass the 1500.0m marker 33.33 seconds after leaving the station. Its velocity is 162.0 km/h.

How to evaluate time the train will pass the 1500.0m marker and it's velocity

To find the time it takes for the train to pass the 1500.0m marker, we can use the formula: time = distance / velocity. Plugging in the values,

time = 1500.0m / 45.0 m/s

time = 33.33 seconds.

To convert the velocity from m/s to km/h, we use the conversion factor: 1 m/s = 3.6 km/h. Therefore,

velocity = 45.0 m/s * 3.6 km/h/m/s

velocity = 162.0 km/h.

In summary, the train will pass the 1500.0m marker approximately 33.33 seconds after departing the station, and its velocity will be 162.0 km/h

Read more about velocity here: here:brainly.com/question/80295

#SPJ3

Answer:

119.88 km/h

Explanation:

1500/45=33.3

use a m/s to km/h calculator

put in 33.3 for m/s and you will get 119.88 km/h.

119.88 km/h.

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