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S_A_V [24]
3 years ago
8

How much work is done in holding a 15 N sack of potatoes while waiting in line at the

Physics
1 answer:
marta [7]3 years ago
4 0

Answer: 2700 Joules

Explanation:

Given variables are:

Workdone (w) = ?

Weight of sack (w) = 15N

Time taken (t) = 3 minutes

The standard unit of time is seconds, so convert 3 minutes to seconds

(If 1 minute = 60 seconds

3 minutes = 3 x 60 = 180 seconds)

Recall that work is done is when force is applied on an object over a distance

i.e Workdone = force x distance.

(However, the force acting on the sack of potatoes is weight)

Hence, workdone = weight x time

w = 15N x 180 seconds

w = 2700 J

thus, 2700 joules of work was done.

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Explain the difference between general intelligence and specific intelligence.
Olegator [25]

Answer:

General intelligence refers to the existence of a broad mental capacity that influences performance on cognitive ability measures.

Specific intelligence refers to a person's aptitude in individual 'modalities' or abilities rather than the more general understanding of intelligence.

Explanation:

4 0
3 years ago
Read 2 more answers
Mt. Asama, Japan, is an active volcano. In 2009, an eruption threw solid volcanic rocks that landed 1 km horizontally from the c
Nata [24]

Answer:

a) 69.3 m/s

b) 18.84 s

Explanation:

Let the initial velocity = u

The vertical and horizontal components of the velocity is given by uᵧ and uₓ respectively

uᵧ = u sin 40° = 0.6428 u

uₓ = u cos 40° = 0.766 u

We're given that the horizontal distance travelled by the projectile rock (Range) = 1 km = 1000 m

The range of a projectile motion is given as

R = uₓt

where t = total time of flight

1000 = 0.766 ut

ut = 1305.5

The vertical distance travelled by the projectile rocks,

y = uᵧ t - (1/2)gt²

y = - 900 m (900 m below the crater's level)

-900 = 0.6428 ut - 4.9t²

Recall, ut = 1305.5

-900 = 0.6428(1305.5) - 4.9 t²

4.9t² = 839.1754 + 900

4.9t² = 1739.1754

t = 18.84 s

Recall again, ut = 1305.5

u = 1305.5/18.84 = 69.3 m/s

7 0
3 years ago
On the ____ scale, an increase of ten dicibels means an intensity increases of ten times.
UkoKoshka [18]

Answer:

the answer is decibel

7 0
3 years ago
what is the valure of work done on an objectwhen a 50newton force moves it 15 metrs in thesame dirction as the force
Snowcat [4.5K]
50 *15=750
work is force time distance times angle between both vectors 
here the angle is 0.
5 0
3 years ago
As the world population continues to rise, the demand for energy also continues to rise. Which type of fuel does little to pollu
Vlad1618 [11]

Answer:

im pretty sure nuclear if not nitrogen

Explanation:

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3 years ago
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