PHYSICS HIGH SCHOOL

A 10 kg bowling ball would require what force to accelerate down an alleyway at a rate of 3 m/s2? F=
M=
A=

Answers

Answer 1

Answer:

The force to accelerate down an alley way will be "30 N".

In the given question, the values are:

Mass,

m = 10 kg

Acceleration,

a = 3 m/s²

As we know the formula for finding the force will be:

→ $Force = Mass* Acceleration$

or,

→ $F = m* a$

By putting the given values in the formula, we get

→ $= 10* 3$

→ $= 30 \ N$

Thus the above answer is correct.

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Answer 2

Answer:

Hello!

A 10 kg bowling ball would require. What force to accelerate down an alleyway at a rate of 3 m/s² ?

We have the following data:

F (force) = ? (in N or kg.m/s²)

m (mass) = 10 kg

a (acceleration) = 3 m/s²

We apply the data to the Net force formula, we have:

$F =m*a$

$F = 10\:kg * 3\:(m)/(s^2)$

$F = 30\:kg*(m)/(s^2) \to \boxed{\boxed{F = 30\:N}}\:\:\:\:\:\:\bf\green{\checkmark}$

Answer:

The force is 30 Newton

______________________

$\bf\purple{I\:Hope\:this\:helps,\:greetings ...\:Dexteright02!}\:\:\ddot{\smile}$

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A block slides down a rough ramp with a 30-degree incline as shown.

Answers

Final answer:

The question involves a block sliding down a 30-degree incline, where the forces of gravity, normal force, and friction are in effect. The acceleration of the block can be determined by taking into account all the forces acting on it. This is a topic in Physics, typically studied at the high school level.

Explanation:

In the described scenario, a block is sliding down a rough ramp inclined at 30 degrees. This topic falls under the area of Physics, specifically in the study of friction and forces. The forces at play in this situation are gravity, normal force, and frictional force. When a block slides down an inclined plane, the force of gravity is divided into two components. The component parallel to the ramp, mg sin θ, acts downwards and is opposed by the force of friction.

The frictional force is determined by multiplying the normal force by the coefficient of friction (μ). This could be represented as F = μN, where F is the frictional slide and N is the normal force. The block's acceleration depends on the net force acting on it, considering all the forces at play.

In this particular situation, where there's a known coefficient of friction of 0.20 and given gravitational and normal forces are 40 N, you can use these values, along with the angle of the ramp, to find the acceleration of the block using formulae from physics.

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Final answer:

A block sliding down a rough incline experiences forces from gravity, friction, and normal force. Friction opposes the motion, reducing the acceleration the block would have on a frictionless slope. The acceleration can be calculated from the incline angle and friction coefficient.

Explanation:

The question deals with the physics of a block sliding down a rough, incline plane. When a block is sliding down an inclined plane, there are several forces at play. The gravitational force pulls the block downwards, the normal force counters this directly perpendicular to the slope, and friction acts to oppose the motion of the block. The coefficient of friction between the block and the incline plays a crucial role in the block's acceleration down the incline.

The acceleration of the block can be calculated using the formula a = g sin θ, where g is acceleration due to gravity and θ is the incline angle. However, this applies when there's negligible friction. If friction is involved, it reduces the acceleration from this value. The acceleration on an incline where there is friction can be calculated with the equation ax = g sin θ - μk g cos θ, where μk is the coefficient of kinetic friction.

Using the equation above, you can calculate acceleration if you are given the friction coefficient and the incline's angle. However, if you're given the acceleration and either the incline angle or friction coefficient, you can rearrange the equation to calculate the missing variable, helping you gain more understanding about the impacts of the slope and friction.

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___________is a highly reactive chemical species with one or more unpaired electrons

Answers

Explanation:

A specie with no charge and containing one or more number of unpaired electrons is known as a free radical.

These free radicals tend to attain stable configuration by gaining an electron from another atom. Hence, they fill their outer energy levels.

For example, a free radical of chlorine will readily combine with a hydrogen atom in order to attain stability and it leads to the formation of a new chemical bond between the hydrogen and chlorine atom.

As a result, it will form a hydrogen free radical.

Thus, we can conclude that free radical is a highly reactive chemical species with one or more unpaired electrons.

Final answer:

A free radical is a highly reactive chemical species with one or more unpaired electrons. They actively participate in chemical reactions due to their need to complete their electron shell. These radicals can be both harmful and beneficial, depending on their context.

Explanation:

A free radical is a highly reactive chemical species with one or more unpaired electrons. These species are reactive because they seek to complete their electron shell by forming pairs, making them eager to engage in chemical reactions.

For instance, in combustion processes, free radicals like hydroxyl (OH) play a crucial role. Despite their reputation for causing damage in biological systems, free radicals are also beneficial as they are used by the immune system to neutralize pathogens.

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When we say that an object wants to maintain its state of motion, we’re talking about inertia. Which term determines the quantity of inertia for an object?

Answers

Inertia is determined by the mass of the object. greater the mass an object has, greater will be its inertia. smaller the mass an object has, smaller will be its inertia. Greater mass enables an object to resist change in its state of motion or rest while on the other hand smaller mass object can be easily made to change its state of motion or rest.

and object has mass, so if moving, has a momentum value.

If you drop a stone into a hole drilled all the way to the other side of Earth, the stone will _____. A. speed up until it gets to the center of Earth B. slow down until it reaches the center of Earth C. speed up until it reaches the other side of Earth D. stop at the center of Earth

Answers

D. It would speed up, then go a little bit of the way to the other side, then it would come back to the centre. But if you do drop a stone down that hole, please put a GoPro on it.

If you live in the USA and you drill a hole all the way through the Earth
to the other side (don't try this at home), then the Indian Ocean will pour
into the hole before you have a chance to do any experiments with it.

But this is our "gedanken" (thought)-experiment, we own it, and we can
add any additional helpful rules to it that we need. So let's say that we got
the government of India to help us with our experiment, and all the time
we were drilling, they had ships out in the Indian Ocean building a wall
around the spot we're aiming for. The wall is a cylinder, 6-inches across
the open end and about 5 miles long ... whatever it has to be to reach the
bottom and settle 1 foot into the mud down there. The wall is completed
2 weeks before the tip of our drill reaches the Earth's surface on the other
side, and the Indian Navy Corps of Engineers uses that 2 weeks to pump
all the water out of that cylinder, so that when the tip of our drill pops out
of the ocean floor, there's nothing but sunshine above it.

Now we start the experiment. The President of The United States and
several hundred scientists, important people, celebrities and dignitaries
are all gathered around the hole in the ground. The Chief Scientist on
the Project hands the stone to the POTUS, and she bends down and
gently drops it into the hole.

The stone falls into the hole, going deeper and deeper, down to where
the sun don't shine, and nobody can see it any more. People wait around
for a while, staring into the hole, but there's nothing seen or heard.
They get bored and start to leave, first one or two people at a time ...
those with the shortest attention spans. Then in small groups, and
eventually everybody gives up and leaves. There's nobody left there
86 minutes later. The stone reappears in the hole, quietly, for just an
instant, rising to exactly the same height as the President's hand was
when she let it go, stopping for an instant, and then just as quickly and
quietly falling back down into the hole, to repeat the whole journey.

Here's what happened to the stone when it was dropped:

-- It fell straight down toward the center of the Earth.falling faster and faster,
gaining speed all the time but with less and less acceleration.

-- It reached its maximum speed as it reached the center of the Earth.
I regret that just now I can't tell you what that speed was, because I don't
know it. But whatever it was, it depended only on the Earth's mass, and
it would have been the same speed for ANY stone that was dropped into
the hole and could fit through without scraping the sides.

-- As the stone passed the center of the Earth, it began to lose speed,
with small deceleration at first, but at a growing rate as it continued farther
from the Earth's center.

-- It arrived at the surface on the other side of the globe 43 minutes after
it was dropped into the hole. As it approached the surface, its speed shrank
to zero, just as its acceleration peaked at 9.8 m/s², and it stopped, for just
an instant, at the surface. In that instant, it was in exactly the same position
and situation as at the moment it was dropped from the hand in the USA, and
if there had been another hand there to grab it, it could have been grabbed
and placed on display in the Museum of Geology at Tech Mahindra's head-
quarters near Mumbai. But there was no hand there, and no sooner had it
appeared at the mouth of the hole and hesitated briefly, than it began to fall
back into the hole, just as if it had been dropped from THIS side.

-- After another 43 minutes, the stone reappeared at the mouth of the hole
in the USA and stopped for an instant. It was 86 minutes since the original
drop. The sound equipment and the lighting had all been taken down, the
technicians were gone, the reporters and their cameramen were all at the
bars, and there were only a few movers left at the scene, dismantling the
VIP bleachers and loading them into the rented trucks. One of them was
leaning against a truck, catching his breath and wiping his brow, when
something caught his eye. He noticed a stone slowly rising from under-
ground toward the mouth of the hole in the ground. Just as the stone
slowly reached the surface, he reached down, plucked it out of the hole,
dropped it into his pocket, climbed into the driver's seat of the truck, and
headed for the rental garage.

The stone did exactly the dance of a pendulum, but without the string ...
minimum speed with maximum potential energy and acceleration at the
ends, maximum speed and kinetic energy with minimum acceleration in
the middle, and a period of 86 minutes.

===> Same period as a satellite in the lowest possible Earth orbit ...
one that skims the Earth's surface just above the mountain peaks, if
there were no atmosphere. 86 minutes. Both for the same reasons,
but which I don't think I could explain like I used to, even if you wanted
to hear it.

Humans can hear frequencies up to approximately 20,000 Hz, while dogs can hear frequencies up to around 60,000 Hz. What sound frequency would you expect to be emitted by a dog whistle, which can be heard by dogs but not by humans?

Answers

Answer:

Between 23,000 to 54,000 Hz

Final answer:

A dog whistle typically emits sound at frequencies above 20,000 Hz but below 60,000 Hz, which is a range humans cannot hear but dogs can.

Explanation:

The frequency of sound emitted by a dog whistle is typically above the range of human hearing, which upper limit is around 20,000 Hz. However, since dogs can hear up to about 60,000 Hz, you would expect a dog whistle to emit sound at frequencies above 20,000 Hz but below 60,000 Hz. So, a frequency anywhere within the range 20,000 Hz and 60,000Hz would be suitable for a dog whistle.