Which of these can harm the human ear?

Over many years a limestone surface is exposed to slightly acidic rain. Which result is likely to occur in the limestone

kvasek [131]

Answer:

calcium carbonate is transformed into calcium sulfate

Explanation:

Limestone stones are formed by calcium carbonate (Ca Co3), when acid rain falls with a little H2SO2, a chemical reaction of the type

Ca Co3 + H2SO4 → CO2 + H2O + CaSo4

Calcium sulfate is much weaker than alatium carbonate, which is why the stone tends to break under its weigh

6 0

3 years ago

In golf, a club is swung to hit a small ball resting on the ground. Golfer A holds his club a short distance behind the golf bal

klemol [59]

Answer:

Golfer B hits his golf ball at a higher rate of speed and with more force. This means that golfer B's ball will travel for a longer period of time and a longer distance due to newtons first law, where it says an object in motion stays in motion, with the same speed and in the same direction.

Explanation:

8 0

2 years ago

You have been abducted by aliens and find yourself on a strange planet. Fortunately, you have a meter stick with you. You observ

defon

Answer:

$36.4276\ m/s^2$

Explanation:

m = Mass of stick

L = Length of stick = 1 m

h = Center of mass of stick = $\dfrac{1}{2}=0.5\ m$

g = Acceleration due to gravity

T = Time period = 0.85 s

Time period is given by

$T=2\pi\sqrt{\dfrac{I}{mgh}}$

Moment of inertia is given by

$I=m\dfrac{L^2}{3}$

$T=2\pi\sqrt{\dfrac{m\dfrac{L^2}{3}}{mgh}}\\\Rightarrow T=2\pi\sqrt{\dfrac{L^2}{3gh}}\\\Rightarrow g=\dfrac{4\pi^2L^2}{3hT^2}\\\Rightarrow g=\dfrac{4\pi^2\times 1^2}{3\times 0.5\times 0.85^2}\\\Rightarrow g=36.4276\ m/s^2$

The acceleration of gravity on this planet is $36.4276\ m/s^2$

0 0

3 years ago

Read 2 more answers

A car is moving with a constant velocity of 25 m/s. Which of the following is true?

S_A_V [24]

b) the net force on the car is zero.

Explanation:

Let's analyze each option one by one:

a) the force from the engine is greater than all the forces of friction. --> FALSE. In fact, the car is moving at constant velocity: this means that its acceleration is zero,

a = 0

and so Newton's second law becomes

$\sum F = ma = 0$

where $\sum F$ is the net force on the car and m is its mass. This means that the net force on the car is zero: so, the force from the engine cannot be greater than all the forces of friction, otherwise the net force cannot be zero.

b) the net force on the car is zero. --> TRUE, for what we said at point A)

c) the inertia is changing. --> FALSE. The inertia of an object just depend on the mass and the velocity of the object: as neither the mass nor the velocity are changing in this problem, then the inertia of the car is not changing.

d) the forces of friction are proportional to the acceleration of the car. --> FALSE. Generally, the force of friction acting on an object moving on a flat surface is

$F_f = \mu mg$

where $\mu$ is the coefficient of friction, m is the mass, and g the acceleration of gravity. Therefore, the force of friction does not depend on the acceleration of the car.

e) All of the above. --> FALSE

Learn more about net force and Newton's second law:

brainly.com/question/3820012

#LearnwithBrainly

6 0

3 years ago

The forces exerted by Earth and a skier become an action-reaction force pair when the skier pushes the ski poles against Earth.

Mnenie [13.5K]

Because of the earth's large mass and solid structure, the skier moves but the earth does not.

<h3>Why can't the earth be moved?</h3>

Because the Earth is such a massive body, it cannot be moved by applying force to it. Because it cannot be moved with a small amount of force
The amount of matter contained in an object is what gives it inertia, or the tendency of matter to remain at rest if at rest, or to continue moving in the same direction at the same speed if moving.
The greater an object's mass, the greater its gravitational force.
Mass is the quantity that is solely determined by an object's inertia. The greater an object's inertia, the greater its mass.
A heavier object is more likely to resist changes in its state of motion.
we can conclude that the skier moves but the earth does not due to the large mass of the earth and its solid structure.

To learn more about earth refer to :

brainly.com/question/25624188

#SPJ9

8 0

1 year ago