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3 years ago

A 300N box on a 43 degree angle.

Physics

1 answer:

Ksenya-84 [330]3 years ago

7 0

Answer:is this a question??? I’m so confused

Explanation:

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When expressing the unit for work, which of the following is the correct choice?

hram777 [196]

I need to write 20 characters but your answer is Joule

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3 years ago

What word is modified by an adjectival phrase in the following sentence? The savings to the project manager at NASA were substan

DedPeter [7]

I am pretty sure that the word which is modified by an adjectival phrase in the following sentence is being revealed by the second options from the box represented above : b. project. I choose this one as a correct answer because it is clear that this word is modified by the phrase :"to the project manager". Hope it will help!

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4 years ago

2. A student drives 7.8-km trip to school and averages a speed of

Alekssandra [29.7K]

Answer:

The total time is: t=451.22 sec

The average speed is: V=34.57 m/s

Explanation:

Average speed

The average speed is calculated by dividing the total distance traveled by an object (x) by the total time it took it to travel that distance (t).

$\displaystyle V=\frac{x}{t}$

Since the student makes the trip in two parts, we have to calculate the total distance and the total time.

We know the distance to school is 7.8 Km = 7,800 m. The student makes his way home over the same distance, thus the total distance is

x=2*7,800 m=15,600 m

The first trip to school was done at an average speed of v1=32.6 m/s. Knowing the distance and speed, we can calculate the time:

$\displaystyle t1=\frac{x1}{v1}=\frac{7,800}{32.6}=239.26\ sec$

The second trip back home was done at an average speed of v2=36.8 m/s. Let's calculate the second time:

$\displaystyle t2=\frac{x2}{v2}=\frac{7,800}{36.8}=211.96\ sec$

The total time is:

$t=239.26\ sec+211.96\ sec=451.22\ sec$

$\boxed{t=451.22\ sec}$

The average speed is:

$\displaystyle V=\frac{15,600}{451.22}=34.57\ m/s$

$\boxed{\displaystyle V=34.57\ m/s}$

6 0

3 years ago

Can someone plz tell me how to solve this step by step

avanturin [10]

Answer:

Explanation:

T=2π√l/g

to solve this for l we have to remove the square root in order to finish square root we have to take square on both side so the equation become

T²=4π²l/g

multiplying g on both side

T²g=4π²l

now dividing 4π² on both side

T²g/4π²=l

so l=T²g/4π²

7 0

3 years ago

Scientist who first proposed the theory that the continents drifted is __________

Aloiza [94]

Answer:

Alfred Wegener

Explanation:

Alfred Wegener is a german meteorologist who proposed the theory that the continents drifted, and he presented it to the German Geological Society on January 1912.

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3 years ago