A rock rolls down a hill. Which form of energy is this an example of? (2 points)

a
Chemical

b
Electrical

c
Mechanical

d
Thermal

Answer:

There are 6.022 × 10²³ atoms of potassium in every mole of potassium.

The moment of inertia of the flat square is MA²/6

The moment of inertia of a body is a property of the body which shows its ability to ritate about an axis.

To find the moment of inertia of the flat square through its center of mass, we know that the moment of  inertia of  a rectangular slab is given by

I = M(a² + b²)/12 where

Now, for a flat square a = b. so,its moment of inertia is I = M(a² + b²)/12

I = M(a² + a²)/12

= 2Ma²/12

= Ma²/6

Now for the given flat square, we have that

So, substituting these into the equation of moment of inertia for the flat square, we have that

The moment of inertia of the flat square is given by

I = Ma²/6

I = MA²/6

So, moment of inertia is MA²/6

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When an object is traveling at a constant speed, the acceleration is 0 m/s².

If an object covers an equal amount of distance in equal interval of time, then the body is said to be moving at a constant speed.

F - ff = ma

where;

During constant speed, acceleration = 0

Thus, when an object is traveling at a constant speed, the acceleration is 0 m/s².

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Answer:

To gain momentum before the jump is made

Answer:

Second Option

Explanation:

The "hard drive" or the second option is one of the main components of storing information on a computer. You already have a hard drive built into your computer, or laptop when you buy it, and you can buy additional hard drives in the form of plugins that can store even more data if your original hard drive becomes full of data.

Hope this helps.

Answer:

B

Explanation:

Whereas memory refers to the location of short-term data, storage is the component of your computer that allows you to store and access data on a long-term basis. Usually, storage comes in the form of a solid-state drive or a hard drive.

Answer:10 m/s

Explanation:

A 100 kg gymnast comes to a stop after tumbling. Her feet do 5,000 J of work to stop her. The girl's velocity when she began to stop is 10 m/sec.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time. Velocity is vector quantity.

Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time. Here in the question velocity is changing by using work energy theorem we have,

work done = change in kinetic energy

5000 = (.5).m.v² , where v is velocity.

5000 = (.5).100.v²

v = 10 m/sec

A 100 kg gymnast comes to a stop after tumbling. Her feet do 5,000 J of work to stop her. The girl's velocity when she began to stop is 10 m/sec.

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Answer:

e) west

Explanation:

According to Lorentz left hand rule, the left hand is used to represent the motion of an electron in a magnetic field. Hold out the left hand with the fingers held out parallel to the palm, and the thumb held at right angle to the other fingers. If the thumb represents the motion of the electron though the field, and the other fingers represent the direction of the field, then the palm will push in the direction of the force on the particle.

In this case, if we point the thumb to the south (towards your body), with the palm facing up, then the fingers will point west.

Answer:

25.9atm

Explanation:

Answer: my grandfather was a marine so he kept me in check

25.8 atm

Explanation:

Total pressure is:

P = Patm + ρgh

where Patm is the atmosphere pressure,

ρ is the fluid density,

g is acceleration due to gravity,

and h is the depth of the fluid.

P = (1 atm) + (1025 kg/m³) (9.81 m/s²) (250 m) (9.8692×10⁻⁶ atm/Pa)

P = 1 atm + 24.8 atm

P = 25.8 atm

3.7e-1437 Gigagram

BRAINILIEST PLEASE

Answer:

a.  F = 14,733.33 N

b. F = 221,000 N

Explanation:

Given;

mass of the cars, m = 1300 kg

velocity of the cars, v = 17 m/s

time taken for the first car to stop after hitting a barrier, t = 1.5 s

time taken for the second car to stop after hitting a barrier, t = 0.1 s

The average forces exerted on each car is calculated as follows;

a. the car that hits a line of water barrels and takes 1.5 s to stop

\(F = ma = m\times \frac{v}{t} = 1300 \times \frac{17}{1.5} = 14,733.33 \ N\\\\F = 14,733.33 \ N\)

b. the car that hits a concrete barrier and takes 0.10 s to stop

\(F = ma = m\times \frac{v}{t}= 1300 \times \frac{17}{0.1} = 221,000 \ N\\\\F = 221,000 \ N\)

The time taken to travel when the speed is 110 km / h is 2.7 hours to cover a distance of 300 km.

We know that,

v = d / t

where,

v = Velocity

d = Distance

t = Time

From the given graph,

At t = 6 hrs, the time taken is 50 km / h

d = 6 * 50

d = 300 km

So this graph represents the time it takes to cover 300 km at different speeds.

At v = 110 km / h

t = 300 / 110

t = 2.7 hrs

The given graph is an example of inverse relationship. An inverse relationship is a hyperbolic relationship in which one variable is the inverse of other variable.

Therefore, the time taken is 2.7 hrs.

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The current (in amperes) the frying pan draws from the 500 volt circuit, given that it has a resistance of 25 ohms is 60 amperes

From the question given above, the following data were obtained:

The current drawn by the frying pan can be obtained as follow:

Voltage (V) = Current (I) × resistance (R)

Inputting the given parameters, we have:

1500 = Current × 25

Divide both sides by 25

Current = 1500 / 25

Current = 60 amperes

Thus, from the above calculation we can conclude that the current drawn by the frying pan is 60 amperes

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Around 2 percent of children and 8 percent of adolescents currently experience a major depressive disorder. As many as 20 percent of adolescents experience at least one depressive episode during their teen years.

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Accuracy refers to how close a measurement is to the true or accepted value. Precision refers to how close measurements of the same item are to each other.

Precision and accuracy are two indices of observational error. Precision is how near a collection of measurements is to its true value, whereas accuracy is how close the measurements are to one other. Precision, in other terms, is a description of random errors and a measure of statistical variability.

If you weigh a body weighing 20 kg and obtain 17.4,17,17.3, and 17.1, your weighing scale is exact but not particularly accurate. If your scale returns values of 19.8, 20.5, 21.0, and 19.6, it is more accurate but not particularly precise.

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The speed of the artillery shell when it hits its target is 100 m/s.

Given:

Initial vertical displacement (y) = 200 m

Vertical displacement at 100 m in the air (y') = 100 m

Final velocity in the vertical direction (vy') = 0 m/s (at the highest point of the trajectory)

Using the equation for vertical displacement in projectile motion:

y' = vy^2 / (2g),

where g is the acceleration due to gravity (approximately 9.8 m/s^2), we can solve for the initial vertical velocity (vy).

100 m = vy^2 / (2 * 9.8 m/s^2),

vy^2 = 100 m * 2 * 9.8 m/s^2,

vy^2 = 1960 m^2/s^2,

vy = sqrt(1960) m/s,

vy ≈ 44.27 m/s.

Now, since the horizontal motion is independent of the vertical motion, the horizontal speed of the shell remains constant throughout its trajectory. Therefore, the speed of the shell when it hits its target is 100 m/s.

Hence, the speed of the artillery shell when it hits its target is 100 m/s.

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Answer:

a)  \(v_2=35.60ft/sec\)

b) \(h_2=45ft\)

Explanation:

From the question we are told that:

Weight \(W=100lbf\)

Decrease in kinetic energy \(dK.E= 500 ft lbf\)

Increase in potential energy \(dP.E =1500 ft lbf.\)

Velocity \(V_1=40\)

Elevation \(h=30ft\)

\(g=32.2 ft/s2\)

a)

Generally the equation for Change in Kinetic Energy is mathematically given by

\(dK.E=\frac{1}{2}m(v_1^2-v_2^2)\)

\(500=\frac{1}{2}*\frac{100}{32.2}(v_1^2-v_2^2)\)

\(v_2=35.60ft/sec\)

b)

Generally the equation for Change in Potential Energy is mathematically given by

\(dP.E=mg(h_2-h_1)\)

\(1500=mg(h_2-h_1)\)

\(h_2=45ft\)

Answer:

D

Explanation:

Gamma, beta, alpha

If right, please mark me brainliest

The types of radiation from the most difficult to easiest to block is Gamma, beta, alpha.

         The energy from the source that travel with the speed of light to the space is known radiation. There are three types of radiation:

they are:

   Alpha particles is a particle which consists of 2 proton and 2 neutron.

The alpha particles can  easy to block.

eg: Helium nucleus

   Beta particles is a ray or radiation that emits electron and positron during the process of beta decay.

   Gamma rays is a radiation which is the penetration of electromagnetic radiations during radioactive decay. These radiations were very difficult to block.

So, Option D is the correct answer.

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One in twelve males have color blindness whereas One in two-hundred females have color blindness. Thus, Option D is correct.

Color blindness is the ability to distinguish different colors. It is hard to differentiate the colors between the same color family. A person with color blindness can not able to see red and green, and can able to see grey, black, and white. It is often inherited.

A person with color blindness can not able to differentiate the colors between red and green. There are three types of color blindness they are Deuteranomaly (difficulty with red-green color blindness and it makes green look redder), Protanomaly(red look greener), Protanopia, and deuteranopia (difficulty in identifying red and green). It is cured by using proper contact lenses.

Thus, One in twelve males has color blindness. Hence, the ideal solution is option D.

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On an ideal transformer, the ratio between the number of turns in the primary and the secondary is the same as the ratio between the input and output voltage:

Since the secondary has 10 times more turns than the primary, then the output voltage must be 10 times greater than the input voltage.

Therefore, the answer is:

Answer:

the magnitude of the normal force on the book is 25.78N

Explanation:

The computation of the magnitude of the normal force on the book is shown below

Normal force = N is

= mgcosβ

= 2.70 × 9.8 × cos13°

= 25.78N

hence, the magnitude of the normal force on the book is 25.78N

The above formula should be applied

The force between the magnet and the can is the noncontact force. The attraction between the magnet and the can is a pull. Therefore, option B and C are correct.

A magnet can be described as a material that produces a magnetic field and this magnetic field is responsible for the properties of a magnet. The properties magnet is such a force that pulls ferromagnetic materials, such as steel, iron, cobalt, etc., towards it.

A permanent magnet can be described as an object made of a material that can be magnetized and creates its own magnetic field. These type of materials are strongly attracted to a magnet, is known as ferromagnetic, and consist of the elements iron, nickel, and cobalt.

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Your question was incomplete, most probably the complete question was,

Mr. wang works in a recycling center recyclable materials arrive at the center mixed together workers use magnets to separate steel cans from other items which two statements are true about the force between a steel can and a magnet:

A) Gravity pushes the can toward the magnet.

B) The force between the magnet and the can is the noncontact force.

C) The attraction between the magnet and the can is a pull

D)  The attraction between the magnet and the can is a push.

Answer:

\(39000\ \text{kg m/s}\)

West

Explanation:

m = Mass of car = \(1.3\times 10^{3}\ \text{kg}\)

t = Time = 9 seconds

u = Initial velocity = 30 m/s

v = Final velocity = 0

Impulse is given by

\(J=m(v-u)\\\Rightarrow J=1.3\times 10^3(0-30)\\\Rightarrow J=-39000\ \text{kg m/s}\)

The magnitude of the total impulse applied to the car to bring it to rest is \(39000\ \text{kg m/s}\).

The direction is towards west as the sign is negative.

The concrete walls' strength, stability, and resistance to water and fire damage can help to reduce the effects of natural phenomena on buildings.

Concrete home construction gives a wall structure that is more durable than steel and wood. Concrete walls do not deteriorate when exposed to moisture from wind-driven rain, diffusion, or airflow. Contrary to steel, concrete does not rust when exposed to moisture. Termites are resistant to concrete barriers.

Powerful building materials like steel and concrete support the home's façade, and ceilings made of western red cedar temper the industrial style inside. These constructions are resistant to natural calamities since they are constructed of sandbags, barbed wire, and soil.

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Answer:

it was established in USA, Johns Hopkins University.

Answer:

The 1st psychology lab in the U.S.A. was established in 1883 at Johns Hopkins University by G. Stanley Hall

Explanation:

v = s/t

20 = s/5

100 = s

s = 100 = 1 × 10².

When a cyclist bikes with an average velocity of 20 m/s for 5 seconds, the magnitude of the cyclist displacement would be 1×10² meters.

The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object. The unit of velocity is meter/second. It can also be represented by the infinitesimal rate of change of displacement with respect to time. The generally considered unit for velocity is a meter per second.

The mathematical expression for velocity is given by the formula

velocity= total displacement/Total time

The area under the velocity-time graph represents the total displacement covered by the object while the slope of the velocity time graph represents the acceleration of the object.

For the given problem when a cyclist bikes with an average velocity of 20 m/s for 5 seconds,

Displacement =velocity×time

                       =20×5

                       =1×10²

The magnitude of the cyclist's displacement is 1×10²

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Answer:

negatively charged

Explanation:

Answer: electrons are negative charged

Explanation:

Answer:

D - Water

Explanation:

A force perpendicular to the electric field will be felt by the proton, and an opposing force will be felt by the electron.

What takes place when an electron and a proton are placed adjacent to one another?

However, a proton and an electron are drawn to one another. Another way to describe it is that similar or "like" charges repel one another, whereas opposite charges attract one another. Because opposing charges are attracted to one another, the negatively charged electrons are drawn to the positively charged protons.

How are electrons created?

a microscopic, negatively charged component found in every atom. Electron streams generated by specialist equipment can be utilized in radiation therapy.

What exactly is a proton?

Each atom's nucleus contains a proton, a subatomic particle. The particle possesses a positive electrical charge that is opposite and equal to that of the electron.

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A horizontal force of 10.0 N is acting on a 10 kg box that is sliding to the right along the floor with velocity v.

Most people make the common assumptions of rigid body action and ignoring air resistance and friction. In statics, all forces and moments must balance to zero; if they don't, the body is accelerating and the laws of statics do not apply, according to the physical interpretation.

The specific situation and the presumptions used will determine how many forces and moments are displayed. Most people make the common assumptions of rigid body action and ignoring air resistance and friction.

In statics, all forces and moments must balance to zero; if they don't, the body is accelerating and the laws of statics do not apply, according to the physical interpretation. The resultant forces and moments in dynamics can have non-zero values.

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