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2 years ago

A 75 kg astronaut floating in space throws a 5 kg rock at 5 m/sec. How fast does the astronaut move backwards?

Physics

1 answer:

JulijaS [17]2 years ago

4 0

Answer:

The astronaut will get a velocity 0.064ms−1 opposite to the direction of the object.

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When Jim and Rob ride bicycles, Jim can only accelerate at three-quarters the acceleration of Rob. Both startfrom rest at the bo

Natali5045456 [20]

Answer:

46.4 s

Explanation:

5 minutes = 60 * 5 = 300 seconds

Let g = 9.8 m/s2. And $\theta$ be the slope of the road, s be the distance of the road, a be the acceleration generated by Rob, 3a/4 is the acceleration generated by Jim . Both of their motions are subjected to parallel component of the gravitational acceleration $gsin\theta$

Rob equation of motion can be modeled as s = a_Rt_R^2/2 = a300^2/2 = 45000a[/tex]

Jim equation of motion is $s = a_Jt_J^2/2 = (3a/4)t_J^2/2 = 3at_J^2/8$

As both of them cover the same distance

$45000a = 3at_J^2/8$

$t_J^2 = 45000*8/3 = 120000$

$t_J = \sqrt{120000} = 346.4 s$

So Jim should start 346.4 – 300 = 46.4 seconds earlier than Rob in other to reach the end at the same time

7 0

3 years ago

Sound waves are converted into mechanical movements by the

iren2701 [21]

Answer:

a.auditory ossicles

b.oval window

c.Round window

d.tympanic membrane

Answer is tympanic membrane

Explanation:

The tympanic membrane otherwise called the ear drum is a membrane shaped like a cone,it connects the outside to the inner ear,it serves to convert vibration from air into fluid membrane vibration a good example of mechanical waves for onwatd transmission into the cochlea of the inner ear through the oval window

6 0

2 years ago

What are two things that happen to the sugars that are made by the plant during photosynthesis?

Elena-2011 [213]

Answer:

The sugars produced by photosynthesis can be stored, transported throughout the tree, and converted into energy which is used to power all cellular processes. Respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

Explanation:

I think this is correct lol.

5 0

3 years ago

What is dependent variable?

Schach [20]

Answer:

A dependent variable is a variable whose value will change depending on the value of another variable, called the independent variable.
The variation of a dependent variable is usually the one being researched and studied between the two variable types (dependent and independent). It is done through regression and alteration of inputs and the development of regression models based on theoretical studies.
The dependent variable is dubbed dependent because it is thought to depend in some way on the variations of the independent variable.

3 0

2 years ago

As a certain object falls, its position s (in meters) above ground after t seconds is given by s(t)=20-5t^2. Whats the average v

denpristay [2]

The average velocity of the object would be :

[s (1.5) - s (1)] / 0.5

= [8.75 -15] / 0.5

= 12.5 m/s

Hope this helps

3 0

3 years ago