3 years ago

Adding a catalyst to a reaction has an effect similar to

1 answer:

3 0

I will say increasing temperature but you dont have that option on your list, so I would take B. Increasing Concentration.

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Five hundred joules of heat are added to a closed system. The initial internal energy of the system is 87 J, and the final inter

Aleonysh [2.5K]

We can solve the problem by using the first law of thermodynamics:

$\Delta U= Q-W$

where

$\Delta U$ is the variation of internal energy of the system

Q is the heat added to the system

W is the work done by the system

In this problem, the variation of internal energy of the system is

$\Delta U=U_f-U_i=134 J-87 J=47 J$

While the heat added to the system is

$Q=500 J$

therefore, the work done by the system is

$W=Q-\Delta U=500 J-47 J=453 J$

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3 years ago

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A mother pats a child every time he throws a chocolate wrapper in the dustbin. This is an example of (A) Observational Learning

TEA [102]

D. I think, not sure

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3 years ago

One problem with digital data is that it can be vulnerable to hackers.

hoa [83]

Answer: c. A person who gains unauthorized access to digital data

Explanation:

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1 year ago

The distance between two electric pole is 800m then express this in terms of mm

Lana71 [14]

Answer:

Mm stands for milimetres

Explanation:

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2 years ago

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A 62Kg rock climber is attached to a rope that is allowing him to hang horizontally with his feet against the wall. The tension

posledela

Answer:

R= 602 .11 N

Explanation:

The horizontal component of tension T will give reaction of the wall and the vertical component of T will balance the weight of of the climber .

T cos32 = R

710 x .848 = R

R= 602 .11 N .

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2 years ago