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weeeeeb [17]
4 years ago
5

A chemist has two compounds that do not chemically react. He thinks that by finding the right catalyst, he can get them to react

. Why is the chemist incorrect?
Physics
2 answers:
8090 [49]4 years ago
7 0

Answer:

The chemist is incorrect because a catalyst increases the rate of reaction only.

Explanation:

A catalyst is a substance in the presence of which the speed of the reaction increases. It plays no role in the chemical change taking place.

Thus, if the two compounds are not chemically reacting, a catalyst wont make it happen either.

A chemical reaction occurs when atoms tend to lose or gain electrons. A catalyst has no role to play in this process.

tankabanditka [31]4 years ago
5 0

Explanation:

A catalyst is a substance which helps in increasing the rate of a chemical reaction without itself getting consumed in the reaction.

So, when two compounds are not able to react chemically then adding a catalyst will not be able to make them react chemically with each other.

This is because a catalyst can only be of use if it is added in a reaction where the species are chemically reacting with each other. Making compounds to react chemically is not a function of catalyst.

That is why, the chemist incorrect in the given situation.

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A person jumps forward off the front of a stationary boat floating on a lake. Identify the reaction force in this case, between
Mamont248 [21]
<span>The boat applying a force on the person pushing her forward. 
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3 0
3 years ago
An overnight rainstorm has caused a major roadblock. Three massive rocks of mass m1=584 kg, m2=838 kg, and m3=322 kg have blocke
Elena-2011 [213]

Answer:

Force must be applied to m₁ to move the group of rocks from the road at 0.250 m/s² = 436 N

Explanation:

Total force required = Mass x Acceleration,

F = ma

Here we need to consider the system as combine, total mass need to be considered.

Total mass, a = m₁+m₂+m₃ = 584 + 838 + 322 = 1744 kg

We need to accelerate the group of rocks from the road at 0.250 m/s²

That is acceleration, a = 0.250 m/s²

Force required, F = ma = 1744 x 0.25 = 436 N

Force must be applied to m₁ to move the group of rocks from the road at 0.250 m/s² = 436 N

8 0
3 years ago
What force is necessary to accelerate a 50kg box at 30 m/s2?
sammy [17]

Answer:

F = m X a

Therefore ,

Force required = 50 X 30 = 1500 newton

6 0
3 years ago
600 kg elephant runs at 5 m/s and jumpts onto a 100kg cart. If the coefficient of friction is .04 how far will the cart travel o
Minchanka [31]

Answer:

Eleven seconds.

Explanation:

Two keys are needed to solve this problem. First, the conservation of momentum: allowing you to calculate the cart's speed after the elephant jumped onto it. It holds that:

m_ev_e+m_c\cdot0=(m_e+m_c)v_0\implies \\v_0=\frac{m_ev_e}{m_e+m_c}=\frac{600kg\cdot 5\frac{m}{s}}{700kg}=4.29\frac{m}{s}

So, once loaded with an elephant, the cart was moving with a speed of 4.29m/s.

The second key is the kinematic equation for accelerated motion. There is one force acting on the cart, namely friction. The friction acts in the opposite direction to the horizontal direction of the velocity v0, its magnitude and the corresponding deceleration are:

F_r = 0.04\cdot (m_e+m_c)g\implies a_r = 0.04\cdot g= 0.04 \cdot 9.8 \frac{m}{s^2}=0.39\frac{m}{s^2}

The kinematic equation describing the decelerated motion is:

v = -a_r t+v_0\\0 = -a_rt+v_0\implies \\t = \frac{v_0}{a_r}=\frac{4.29\frac{m}{s}}{0.39\frac{m}{s^2}}=11s

It takes 11 seconds for the comical elephant-cart system to come to a halt.

7 0
4 years ago
Over the course of 30 seconds, 3 waves hit the shore. What is the period of the waves?
laila [671]

Answer:

3 per 10 seconds.

Explanation:

If it's 30 seconds and 3 waves hit throughout that time period, dividing should get you your answer..

30/3 = 10.

Hope this helped!

Source(s) used: N/A

5 0
3 years ago
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