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2 years ago

F= (9.3 x 105 )(4.2 x 10-15)

Physics

1 answer:

kvv77 [185]2 years ago

8 0

Answer:

3.906E-9 or 3.906 x 10-9

Explanation:

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a 15 year old broke into a store with his buddies one of the older boys shot and killed the store owner what the text says about

Tom [10]

He’s gonna be charged with aggravated robbery with deadly assault an a weapon

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3 years ago

Over a span of 6.0 seconds, a car changes its speed from 89 km/h to 37 km/h. What is its average acceleration in meters per seco

faltersainse [42]

Answer: Average acceleration is -2.407 $\frac{m}{s^{2}}$

Explanation:

Average acceleration is equal to change in velocity divided by time taken

therefore, $a=\frac{Vf-Vi}{t}$

=> $a=\frac{37-89}{6}\times \frac{5}{18}\frac{m}{s^{2}} = -2.407 \frac{m}{s^{2}}$

6 0

3 years ago

Please help ASAP! Thanks! Willing to give brainly.

nlexa [21]

The correct answer is inertia

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2 years ago

Determine the energy lost, due to friction, as an 8000 N car that skids to a stop, if its initial velocity was 12 m/s.

chubhunter [2.5K]

Answer:

<em>58,800Joules</em>

Explanation:

The energy lost is equal to the workdone by the car as it skids.

Workdone = Force * Distance

Given

Force = 8000N

Get the distance using the equation of motion

v² = u² - 2gS

0² = 12² - 2(9.8)S

-12² = - 2(9.8)S

-144 = -19.6S

S = 144/19.6

S = 7.35m

Calculate the required energy

Workdone = 8000 * 7.35

Workdone = 58,800Joules

<em>Hence the energy lost due to friction is 58,800Joules</em>

3 0

2 years ago

Using a 2.44kg sledge hammer, a railroad worker drives a 0.55kg spike into a railroad tie. The sledge hits the spike with a spee

Mazyrski [523]

Answer:

1547.6 J

Explanation:

From the law of conservation of energy, the sum of initial and final energy is the same. Energy can only be transformed into other forms but can't be created nor lost

Initial kinetic energy of the hammer system is given by

$KE_i=0.5mv^{2}$ where m is mass of the body and v is the velocity

Substituting m for mass of hammer which is 2.44 Kg and v for 62 m/s

$KE_i=0.5*2.44 Kg*(62 m/s)^{2}=4689.68 J$

Since the hammer comes to rest, the final kinetic energy is zero since it's velocity is zero

$KE_f=0 J$

Change in kinetic energy is given by

$\triangle KE= KE_f-KE_i$ hence 0-4689.68 J=-4689.68 J

Change in total internal energy is given by

$\triangle PE-\triangle KE$ and in this case the change in potential energy is zero

$\triangle PE-\triangle KE=0--4689.68 J=4689.68 J$

Since only 0.33 of this energy is converted hence

$0.33\times4689.68 J=1547.5944 J\approx 1547.6 J$

6 0

2 years ago