PHYSICS HIGH SCHOOL

Ilya and Anya each can run at a speed of 7.30 mph and walk at a speed of 4.00 mph. They set off together on a route of length 5.00 miles. Anya walks half of the distance and runs the other half, while Ilya walks half of the time and runs the other half. a) How long does it take Anya to cover the distance of 5.00miles? b) Find Anya's average speed. c) How long does it take Ilya to cover the distance? d) Now find Ilya's average speed.

Answers

Answer 1

Answer:

Answer:

a)0.9675 h

b)5.168 mph

c)0.885 h

d)5.65 mph

Explanation:

The distance travelled by a moving object can be calculated as the velocity multiplied by the time, for this problem we can divide the problem in two stages, one where the are walking and another where they run,

Considering the total time for Anya is $t_(a)$ :

She first walks for half the distance (2.5 miles) so:

$2.5 miles=V_(w)*t_(a1)$

Solving for $t_(a1)$ :

$t_(a1)=(2.5miles)/(V_(w))=(2.5miles)/(4 mph)=0.625 h$

Then she runs the other half of the distance:

$2.5 miles=V_(r)*t_(a2)$

$t_(a2)=(2.5miles)/(V_(r))=(2.5miles)/(7.3 mph)=0.3425 h$

Adding this two durations we have the total time it takes for Anya to cover the distance:

$t_(a)=0.3425 h+0.625 h=0.9675 h$

The average velocity can be calculated as the total distance divided by the total time:

$V_(a-av) =(5 miles)/(0.9675 h) =5.168 mph$

Considering the total time for Ilya is $t_(I)$ :

She first walks for half the time so:

$d_(I1)=V_(w)*t_(I)/2$

Where $V_(w)$ is the velocity when walking (same for both people). On the second half she runs:

$d_(I2)=V_(r)*t_(I)/2$

This two distances must sum the total distance 5 miles, so:

$d_(I2)+d_(I2)=5 miles$

replacing the expressions above:

$V_(w)*t_(I)/2+V_(r)*t_(I)/2=(V_(w)+V_(r))*t_(I)/2=5 miles$

$t_(I)=(5miles*2)/(V_(w)+V_(r))=(10 miles)/(4mph+7.3mph)=0.885 h$

so it takes Ilya 0.885 hours to to cover the distance

The average velocity can be calculated as the total distance divided by the total time:

$V_(I-av) =(5 miles)/(0.885 h) =5.65 mph$

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'When we see something that exists in real life, there are many different ways to display imagery and importance using art. What the artist _____________ depends on what he/she wants to communicate.'

Answers

Answer:

Emphasizes

Explanation:

The expression of an art is intelligible to those that understand it, as such to make an impression an artist has to emphasize the point they want to communicate

An art is an expression of the personal experiences of the artist or a reaction to events or to reveal the realities as seen by the artist such as global warming and the environment, so as to get the attention of people with the goal to change them, such that a good art changes the most people, hence the need for emphasis.

Answer:

A - emphasizes

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called A. a secondary market.
B. demographics.
C. survey statistics.
D. the target market.

Answers

Answer;

B. demographics.

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called demographics.

Explanation;

Demographics are features of a particular population. It involves the study of a population based on factors such as age, sex, race, family size and occupation, etc.
For marketing purposes firms or companies use specific data such as age, income, family size, religion, race, nationality and occupation. This may be referred to as demographic segmentation, which is used by the companies to get the right population using their products.

B. demographics.

Specific data such as age, income, family size, and occupation, used for marketing purposes, is called demographics.
NOT:
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C. survey statistics.
D. the target market.

If sediment is pushed along the underside of a glacier, what would occur?

Answers

When sediment is pushed along the underside of the glacier, striations occur. Striations are "Scratches" that look like long, parallel grooves. This also shows the direction that the glacier has moved in. Sediment gets pushed along the underside due to the flowing of the glacier.

Answer:

Glacial Striations

Explanation:

Glacier is an erosion agent that transports and deposits sediments.

Due to the weight and gradual flow of a glacier, it carves along parts of the mass beneath it, these parts are known as sediments, this movement causes marks to appear on the land beneath it. These marks are called Glacial Striations.

A turntable is designed to acquire an angular velocity of 32.4 rev/s in 0.5 s, starting from rest.Find the average angular acceleration of the turntable during the 0.5 s period.
Answer in units of rad/s2

Answers

Well, the acceleration is the difference of speeds divided by the time period. $(32.4)/(0.5)=64.8rev/s^2$ .
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Answer:

not sure lol

Explanation:

ummmmmm look it up on peersanswer.com

Anyone get this if you do please help me step by step