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3 years ago

11

What are two differences between gravity and air resistance

1 answer:

Natalka [10]3 years ago

4 0

1. Air resistance force usually upwards, but gravity doenwards.

2. Objects are affected by gravity the same, but air resistance can affect the speed of an object's descent.

Sorry if im wrong

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How much of the electromagnetic spectrum is visible light?

Margarita [4]

I believe the answer is D, only a small part of it

8 0

4 years ago

Read 2 more answers

How many miles will be completed by a runner with a constant speed of 5 mph in 30 minutes?

Mrac [35]

Distance=speed times time
speed=5mph=5 $\frac{mi}{hr}$
time=30mins=30/60hr=1/2hr

so
distance=speed times time
$distance=(5\frac{mi}{hr})(\frac{1}{2}hr)$
$distance=\frac{5mi \space\ hr}{2hr}$
$distance=2.5mi$

he will run 2.5 miles in 30 mins at the speed of 5mph

5 0

3 years ago

A light, flexible cable is wrapped around a solid cylinder with mass 3.3 kg and a radius of 0.8 meters. The cylinder rotates on

kari74 [83]

Answer:

$9.16rad/s^2$

Explanation:

We are given that

Mass, $m_1=3.3 kg$

Radius,r=0.8 m

$m_2=4.9 kg$

Height,h=2.9 m

We have to find the angular acceleration of the cylinder.

According to question

$4.9g-T=4.9a$

$Tr=I\alpha$

Where

$\alpha=\frac{a}{r}$

$Tr=\frac{1}{2}m_1ra$

$T=\frac{1}{2}m_1a=\frac{1}{2}(3.3)a$

Substitute the value

$4.9g-\frac{1}{2}(3.3a)=4.9a$

$4.9\times 9.8=4.9a+\frac{3.3a}{2}$

Where $g=9.8 m/s^2$

$48.02=a(4.9+1.65)=6.55a$

$a=\frac{48.02}{6.55}=7.33m/s^2$

Angular acceleration, $\alpha=\frac{a}{r}=\frac{7.33}{0.8}=9.16rad/s^2$

7 0

3 years ago

You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical

just olya [345]

Answer:

the total mass after chemical burn is 700 gram

Explanation:

Given data

glass mas s= 200 gram

chemical mass = 500 gram

total mass = 700 gram

to find out

what is the total mass after chemical burn

solution

we have given 200 gram + 500 gram = 700 gram

and we know here according to question that

container is sealed so total mass remain in container before burning and after burning

no air will release in seal container so

mass will be same as 700 gram

hence the total mass after chemical burn is 700 gram

3 0

4 years ago

NEED HELP ASAP PLEASE!

katrin [286]

Answer:

Here is the solution hope it helps:)

5 0

2 years ago