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3 years ago

How well does your physical environment support human activity?

2 answers:

5 0

Answer: The physics of human beings is often overpopulated, polluted, fossil-burning and deforested. These adverse effects can influence human behavior and lead to mass migration

Explanation:

svp [43]3 years ago

5 0

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. These negative impacts can affect human behavior and can prompt mass migrations or battles over clean water.

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Jose is loading his luggage into his car so that he can go to visit his grandmother. He lifts his suitcase up a 10 m staircase i

maxonik [38]

Answer:

The work done on the suitcase is, W = 600 J

Explanation:

Given,

The average force exerted by Jose on his suitcase, F = 60 N

Jose carried the suitcase to a distance, S = 10 m

The work done on the suitcase is given by the relation

Substituting the given values in the above equation,

W = 60 N x 10 m

= 600 J

Hence, the work done on the suitcase is, W = 600 J

3 0

3 years ago

PRACTICE ANOTHERA rabbit is hopping along at an approximately constant speed of 4.2 m/s. The rabbit passes a crouched cat ready

V125BC [204]

Answer:

16.8 seconds

Explanation:

Given that:

Constant speed of rabbit = 4.2 m/s

Initial Velocity (u) of cat = 0

Acceleration (a) of cat = 0.5 m/s²

Time it takes cat to catch rabbit ;

Using the relation:

Distance moved by rabbit (Dr) :

Dr = speed * time ; Dr = 4.2t

Distance moved by Cat (Dc) :

Dc = ut + 0.5at^2

Dc = 0 + 0.5at^2

Hence, Cat will catch rabbit when Dr = Dc

4.2t = 0.5at^2

4.2t = 0.5(0.5)t^2

4.2t = 0.25t^2

Divide both sides by t

4.2 = 0.25t

t = 4.2 / 0.25

t = 16.8 seconds

Hence, the cat will catch the rabbit after 16.8 seconds

5 0

3 years ago

What is the total capacitance in units of mF, of the two capacitors connected in series, as shown in the diagram, when C1 = 45 m

elena-14-01-66 [18.8K]

Answer:

16.7 mF

Explanation:

The total capacitance of two capacitors connected in series is given by the formula:

$\frac{1}{C}=\frac{1}{C_1}+\frac{1}{C_2}$

in our problem, we have:

C1 = 45 mF is the capacitance of the first capacitor

C2 = 26 mF is the capacitance of the second capacitor

Substituting into the equation, we find:

$\frac{1}{C}=\frac{1}{45 mF}+\frac{1}{26 mF}=0.06 mF^{-1}\\C=\frac{1}{0.06 mF^{-1}}=16.7 mF$

7 0

3 years ago

Read 2 more answers

You are riding your bike to the mall. You travel the first mile in ten minutes. The last mile takes you 15 minutes. This is an e

Valentin [98]

I'm pretty sure it's D. negative acceleration

6 0

3 years ago

if you drop a softball from just above your knee, the kinetic energy of the ball just before it hits the ground is about 1 jule,

ipn [44]

False.

The mass of a softball is approximately 200 g (0.2 kg), while the knees are located approximately at 30 cm (0.3 m) from the ground. It means that the gravitational potential energy of the ball when it is dropped is
$U=mgh=(0.2 kg)(9.81 m/s^2)(0.3 m)=0.6 J$

This corresponds to the total mechanical energy of the ball at the moment it is dropped, because there is no kinetic energy (the ball starts from rest). Then the ball is dropped, and just before it hits the ground, all this energy is converted into kinetic energy: but energy cannot be created, so its final kinetic energy cannot be greater than 0.6 J.

7 0

3 years ago