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2 years ago

11

. True or False: A bystander intervention is the term used to define when an individual actively moves in and changes the outcom

e of a situation.

1 answer:

notsponge [240]2 years ago

8 0

Answer:

true

Explanation:

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The velocity of a car increases by 40 m/s in 80 seconds. What is the acceleration of the car

yan [13]

Given that the velocity of a car increases by 40 m/s in 80 seconds, the acceleration of the car will be given by:
a=(final velocity-initial velocity)/(time)
thus;
final velocity=40 m/s
initial velocity=0
time=80 seconds
hence;
a=(40-0)/80
=0.5m/s^2

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3 years ago

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4 years ago

Which of the following is not a type of pulley system

NikAS [45]

I think the answer is D: advantageous

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3 years ago

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How much energy (in joules) is required to evaporate 0.0005 kg of liquid ammonia to vapor at the same temperature?

Lana71 [14]

Answer:

685.6 J

Explanation:

The latent heat of vaporization of ammonia is

L = 1371.2 kJ/kg

mass of ammonia, m = 0.0005 Kg

Heat = mass x latent heat of vaporization

H = 0.0005 x 1371.2

H = 0.686 kJ

H = 685.6 J

Thus, the amount of heat required to vaporize the ammonia is 685.6 J.

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3 years ago

A sample of oxygen gas with a volume of 3.0 m3 is at 100 C. The gas is heated so that

vesna_86 [32]

$\qquad\qquad\huge\underline{{\sf Answer}}$

According to Charles law, if pressure remains constant, volume varies directly with temperature. so we can infer that :

$\qquad\sf{\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}}$

So, we can use this formula to find out the final temperature of the gas ~

Note : Take temperature in Kelvin ( 100°C = 373 K )

$\qquad \sf \dashrightarrow \: \dfrac{3}{373} = \dfrac{6}{x}$

$\qquad \sf \dashrightarrow \: x = \dfrac{6}{3} \times 373$

$\qquad \sf \dashrightarrow \: x = 2 \times 373$

$\qquad \sf \dashrightarrow \: x =74 6 \: K$

Now, convert it to Celsius ~

i.e 746 - 273 = 473° C

So, the final temperature of the gas will be equal to 473° C

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2 years ago