3 years ago

Activity: Lab safety and Equipment Puzzle

Physics

1 answer:

koban [17]3 years ago

5 0

Answer:

number 2 down is: safetygoggles

Explanation:

no space

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Unlike mechanical waves such as sound or earthquake waves, EM waves can travel through empty space. True or false

Alex777 [14]

Answer:

its true

Explanation:

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3 years ago

A cart being pulled with 30N through a 2 m hallway over two seconds. How does it have the greatest power exerted on it

Lapatulllka [165]

Answer:

Power = 30 [watts]

Explanation:

Initia data:

F = force = 30[N]

d = displacement = 2 [m]

By definition we know that work is equal to the product of force by the distance displaced

Therefore:

W = F * d = 30 * 2

W = 60 [J]

And power is defined as the amount of work done in a given time interval

time = t = 2 [sec]

Power = W / t

Power = 60 / 2

Power = 30 [W]

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3 years ago

How far does a car travel as it accelerates from 12 m/s to 18 m/s at 3 m/s??

yulyashka [42]

Answer:

Explanation:

I ASSUME you mean acceleration is 3 m/s²

v² = u² + 2as

s = (v² - u²) / 2a

s = (18² - 12²) / (2(3))

s = 30 m

to verify we can see that the acceleration time is

t = (18 - 12) / 3 = 2 s

s = 0 + 12(2) + ½(3)2² = 30 m

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2 years ago

Leto [7]

Answer:

Explanation:

6 0

3 years ago

Read 2 more answers

A certain elevator cab has a total run of 198 m and a maximum speed is 317 m/min, and it accelerates from rest and then back to

tester [92]

Answer:

Explanation:

Given

Total run=198 m

maximum speed=317 m/min=5.28 m/s

acceleration $=1.11 m/s^2$

(a)Distance traveled while accelerating

$v^2-u^2=2as$

$(5.28)^2-0=2\times 1.11\times s$

s=12.57 m

time taken

v=u+at

$5.28=0+1.11\times t$

t=4.75 s

(b)Time taken to cover 198 m

if car takes 12.57 m & 4.75 s to reach max speed so it also takes 12.57 m and 4.75 s to stop from max speed

Distance traveled with max speed=198-25.14=172.86 m

time taken $=\frac{172.86}{5.28}=32.73 s$

total time=4.75+32.73+4.75=42.25 s

7 0

3 years ago