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3 years ago

How do catalysts speed up reactions please help quickly

2 answers:

8 0

How do catalysts speed up reactions ?

by reducing the amount of energy required for the reaction to occur. other factors such as <span>catalysts' ability to speed a process are temperature, concentration </span>

nikitadnepr [17]3 years ago

7 0

i think its because They lower the energy barrier of a reaction.

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In a lab experiment, two identical gliders on an air track are held together by a piece of string, compressing a spring between

ddd [48]

Answer:

Part a)

$v_2 = -0.300$

Part b)

Here final kinetic energy is more than the initial kinetic energy

This increase in kinetic energy is due to spring connected between them as the spring energy is converted into kinetic energy of two blocks

Explanation:

Part a)

As we know that there is no external force on the system of two gliders

So here we can use momentum conservation for two gliders

So we will have

$m_1 v_1 + m_2 v_2 = (m_1 + m_2)v_i$

$m_1 = m_2$

$1.300 + v_2 = 2(0.500)$

$v_2 = -0.300$

Part b)

now we will have

initial kinetic energy of both gliders is given as

$K_i = \frac{1}{2}(m + m)(0.500)^2$

$K_i = 0.25m$

Final kinetic energy of two gliders

$K_f = \frac{1}{2}m(0.300)^2 + \frac{1}{2}m(1.300)^2$

$K_f = 0.89 m$

so here final kinetic energy is more than the initial kinetic energy

This increase in kinetic energy is due to spring connected between them as the spring energy is converted into kinetic energy of two blocks

8 0

3 years ago

Alice and tom dive from an overhang into the lake below. tom simply drops straight down from the edge, but alice takes a running

svetlana [45]

<span>Alice and Tom will reach the surface of the lake at the same time. In this problem. Both Alice and Tom have 2 components to their velocities. A horizontal component and an increasing vertical component due to gravity. They start out with different horizontal components, but that component does not in any way contribute to their vertical velocities. Since they both started out at the same height and the same vertical velocities, they will reach the surface of the lake at the same time.</span>

3 0

4 years ago

if a star is moving away from you how does it affect the wavelength of the light waves that reach you?

taurus [48]

This is called the Doppler Effect. It is the alteration in frequency of a wave when the source, the light waves in this situation, and the observer are moving away from each other. The reason for stars to appear further from the observer is the constant expansion of the universe.

4 0

3 years ago

Read 2 more answers

If the major axis of an ellipse is 16 cm, what is the semimajor axis? If the eccentricity is 0.8, would this ellipse be best des

Black_prince [1.1K]

Answer:

elongated orbit

Explanation:

major axis, a = 16 cm

Semi major axis, = half of major axis = 16 / 2 = 8 cm

e = 0.8

the relation between the minor axis, eccentricity and the length of major axis is given by