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viktelen [127]
3 years ago
11

WILL GIVE BRAINLIEST!!!

Physics
1 answer:
vovikov84 [41]3 years ago
3 0

Answer:

D.

boulder-sized rocks that come from the asteroid belt

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What time period is jellyfish first appear
const2013 [10]

According to scientists, the first fossil of a jellyfish first appeared approximately 500 million years ago. Or to be more exact, the Cambrian Period.

Hope I could help! :)

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3 years ago
What is the average speed of a bird that flies 1.55 km in 30 minutes
Alexxandr [17]

Answer:

the average speed in annual work out is 46.5

5 0
3 years ago
A particular circular track on level ground has a circumference of 400 m. a walker, traveling counterclockwise and starting at t
Sidana [21]

Answer:

Average speed: 0.5 m/s. Average velocity: 0

Explanation:

Average speed is given by:

v=\frac{d}{t}

where

d is the total distance covered (the length, of one lap of the track, so d = 400 m)

t is the time taken to cover that distance (so, t = 800 s)

Substituting,

v=\frac{400}{800}=0.5 m/s

Instead, average velocity is defined as

v=\frac{d}{t}

where this time,

d is the displacement, which is the vector connecting the starting point to the final point of the motion

t is still the time taken (800 s)

However, in this case the walker starts and finishes his trip at the same point: therefore, the displacement is zero (d=0), and this means that the average velocity is zero as well.

3 0
3 years ago
Select the correct answer.
Marrrta [24]

Answer:

Matthew should use the safety glasses as his PPE.

Explanation:

5 0
3 years ago
Read 2 more answers
A uniform solid disk and a uniform hoop are placed side by side at the top of an incline of height h. If they are released from
svlad2 [7]

Answer:

) the uniform disk has a lower moment of inertia and arrives first.

Explanation:

(a) the uniform disk has a lower moment of inertia and arrives first.

(b) Let's say the disk has mass m and radius r, and

the hoop has mass M and radius R.

disk: initial E = PE = mgh

I = ½mr², so KE = ½mv² + ½Iω² = ½mv² + ½(½mr²)(v/r)² = (3/4)mv² = mgh

m cancels, leaving v² = 4gh / 3

hoop: initial E = Mgh

I = MR², so KE = ½MV² + ½(MR²)(V/R)² = MV² = Mgh

M cancels, leaving V² = gh

Vdisk = √(4gh/3) > Vhoop = √(gh)

3 0
3 years ago
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