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masya89 [10]
3 years ago
15

An object has an angular velocity of 1.0 rad and an angular acceleration of 0.5 rad/s. Is the speed of its rotation increasing o

r decreasing?
Physics
1 answer:
alexdok [17]3 years ago
6 0

Answer:

increasing

Explanation:

Given that,

Initial angular speed =1 rad/s

Angular acceleration = 0.5 rad/s²

We know that the angular acceleration is given by :

\alpha =\dfrac{\omega_f-\omega_i}{t}

Where

\omega_fcity and t is time is the final angualr velo

As the angular acceleration of the object is positive. It means that the final speed of the object is more than that initial. As a result, the speed of its rotation is increasing.

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Point charges of 28.0 µC and 42.0 µC are placed 0.500 m apart. (a) At what point (in m) along the line connecting them is the el
olga_2 [115]

Answer: a) electric field will be zero at zero meters apart

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Can anybody help me it says, Model the force that would cause each velocity change.
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Please try to take a better photo as it is difficult to read.

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For the second case, there is no force as there is no change in velocity

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Which of the following statements about Copernicus' heliocentric model of the Solar System are accurate?
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Answer:

(i) It was the first such model was supported by scientific evidence: FALSE

(ii) It was not published until Copernicus was close to death: TRUE

(iii) It was the first time a heliocentric model had ever been suggested: FALSE

(iv) It was not controversial, and was readily accepted: FALSE

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(vi) It stated that the Earth revolved around the Sun: TRUE

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We proceed to demonstrate the validity of each option from statement:

(i) It was the first such model was supported by scientific evidence: FALSE

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(ii) It was not published until Copernicus was close to death: TRUE

Copernicus published his heliocentric theory, contained in the book <em>De revolutionibus orbium coelestium,</em> months before his death, in 1543.

(iii) It was the first time a heliocentric model had ever been suggested: FALSE

Greek mathematician and astronomer Aristarchus of Samos was the first person who proposed the heliocentric model in the 4th Century.

(iv) It was not controversial, and was readily accepted: FALSE

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(v) It stated that the Sun revolved around the Earth: FALSE

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