Which possesses the most gravitational potential energy
A A 50 g object 30 m above the ground
B A 100 g object 20 m above the ground
C A 2 kg object 0.75 m above the ground
D A 4 kg object 0.25 m above the ground

Answer:

Explanation:

Find the diagram of the scenario in the attached file.

From the diagram, the weight = mass * acceleration due to gravity

mass of sled = 30.0kg

acc. due to gravity = 9.81m/s

weight of the sled = 30.0*9.81

weight of the sled = 294.3N

The normal reaction force R in the diagram will be gotten by resolving the 12N force along the vertical

Ry = 12sin45°

R = 12 * 1/√2

R = 12√2/√2

R = 6√2 N

R = 8.49N ≈ 9.0N

The normal force exerted on the sled is approximately is 9.0N

Get the acceleration

Using the formula \(\sum Fx = ma_x\) where;

m is the mass of the sled = 30.0kg

\(a_x\) is the acceleration of the sled

\(\sum Fx = 8 + 12cos45^0\\\sum Fx = 8 + 12(0.7071)\\\sum Fx = 8 + 8.49\\\sum Fx = 16.49N\)

Substitute into the formula;

\(a_x = \frac{\sum Fx }{m} \\ a_x = \frac{16.49}{30}\\ a_x = 0.55 m/s^2\)

Hence the acceleration of the sled rounded to the nearest hundredth is 0.55m/s²

Answer:

electromagnetic waves can travel through a vacuum where as mechanical waves have to have a medium to travel

Explanation:

If an object is speeding up, the sign of its velocity and acceleration are the same. Option B is correct.

This means that both velocity and acceleration are positive if the object is moving in the positive direction and negative if the object is moving in the negative direction. Acceleration is defined as the rate of change of velocity over time, so if an object is speeding up, its velocity is increasing over time. This increase in velocity can be positive or negative, depending on the direction of motion, but in either case, the acceleration must be in the same direction as the velocity.

Distance and speed are not inversely proportional in this case, as they can both increase or decrease together when an object is speeding up. The magnitude of velocity and acceleration are not always zero, as they can be positive or negative depending on the direction of motion. Option B is correct.

To know more about the Acceleration, here

https://brainly.com/question/30499732

#SPJ4

Answer:

three

Explanation:

It just is

Answer:

6 i think

Explanation:

Answer:

Total mechanical energy = 225 J

Explanation:

Given:

Mass of duck (m) = 2 kg

Speed of duck (v)= 5 m/s

Height of duck from ground (h) = 10 m

Gravitation acceleration (g) = 10 m/s²

Find:

Total mechanical energy

Computation:

Total mechanical energy = Kinetic energy + Potential energy

Total mechanical energy = (1/2)mv² + mgh

Total mechanical energy = (1/2)(2)(5)² + (2)(10)(10)

Total mechanical energy = 25 + 200

Total mechanical energy = 225 J

Answer:

A. Displacement is a vector quantity.

Answer:

the current is 3.5 A

Explanation:

The computation of the current is shown below:

As we know that

Current [A] = Electrical power [W] ÷ Potential difference [V]

Now convert KW TO W = × 1000

So, the current is

= 800W ÷ 230V

= 3.5 A

Hence, the current is 3.5 A

The vertical height of the marble when it comes to a stop before rolling back is 20 centimeters.

As per the Law of conservation of energy,

If there is no external force acting on the system, the energy will always remains the same at every point of the motion.

As, we can see, there is no external force on the marble,

Energy of the marble at start will be equal to energy of the marble at the vertical height

We can write,

Energy while rolling = Energy at the highest point

1/2MV² = MgH

Where,

M is the mass of the marble,

V is the velocity of the marble,

g is the acceleration due to gravity and,

H is vertical height of the marble.

So,

1/2MV² = MgH

1/2V² = gh

Putting all the values,

1/2(2)² = 10H

H = 4/20

H = 0.2 meters.

So, the vertical height of the marble is 20 cm.

To know more about Law of Conservation of Energy, visit,

https://brainly.com/question/166559

#SPJ4

The centripetal force exerted on the car, given it has a mass of 1500 Kg and is moving with a velocity of 40 m/s is 200000 N

Centripetal force is defined according to the following equation:

F = mv²/r

With the above formula, we can obtain the centripetal force as follow:

The centripetal force exerted on the car can be obatined as illustrated below:

F = mv²/r

F = (1500 × 40²) / 12

F = (1500 × 1600) / 12

F = 2400000 / 12

F = 200000 N

Thus, the centripetal force exerted is 200000 N

Learn more about centripetal force:

https://brainly.com/question/14021112

#SPJ1

The distance covered by the truck would be 188.4 meters.

Initial velocity, u = 63 km/h = (63 x 1000 m) / (3600 s) = 17.5 m/s

Final velocity, v = 84 km/h = (84 x 1000 m) / (3600 s) = 23.3 m/s

We can use the equation:

v^2 = u^2 + 2as

where v is the final velocity, u is the initial velocity, a is the acceleration, s is the distance traveled.

Substituting the values we get:

(23.3)^2 = (17.5)^2 + 2(1.25)s

Simplifying and solving for s, we get:

s = [(23.3)^2 - (17.5)^2] / (2 x 1.25) = 188.4 meters (rounded to one decimal place)

Therefore, the truck travels a distance of 188.4 meters as it accelerates uniformly from 63 km/h to 84 km/h with an acceleration of 1.25 m/s^2.

More on distance-time can be found here: https://brainly.com/question/18798899

#SPJ1

High-intensity interval training (HIIT) can be included in a training plan to improve anaerobic power in a 16-year-old sprinter.

Anaerobic power is the ability to perform short, high-intensity bursts of activity without relying on oxygen. HIIT involves alternating periods of high-intensity exercise with periods of rest or lower intensity exercise. This type of training has been shown to improve anaerobic power in athletes. A track coach may design a HIIT program that includes sprints, plyometric exercises, and resistance training to improve the sprinter's power and speed.

However, it is important for the coach to consider the individual athlete's current fitness level and adjust the intensity and volume of the program accordingly to avoid injury and overtraining. Adequate rest and recovery time should also be included in the training plan to allow for proper adaptation and improvement in performance.

Learn more about anaerobic power here:

https://brainly.com/question/7335599

#SPJ11

Answer:

lol

Explanation:

it was funny

Geber’s role in the history of science is the spread of Arabic alchemical theories throughout western Europe.

Geber is an Islamic scholar of the Middle Ages who is considered the father of alchemy and one of the founders or pioneers of pharmacology and modern chemistry.

Geber accepted most of the Arabic alchemical theories and spread them throughout western Europe.

Geber assumed that all metals are composed of sulfur and mercury and gave detailed descriptions of metallic properties in those terms.

He also explained the use of an elixir in transmuting base metals into gold.

Thus, the Geber’s role in the history of science is the spread of Arabic alchemical theories throughout western Europe.

Learn more about alchemical theories here: https://brainly.com/question/17199784

#SPJ1

Static electricity can be both an enemy and a friend depending on the situation.

Static electricity is a well-known electric phenomenon that involves the transfer of charged particles from one body to another. As a friend, static electricity is used in various technologies such as electrostatic spraying, electrostatic printing, and electrostatic precipitators.

However, as an enemy, static electricity can cause sparks that can ignite flammable materials, cause electronic devices to malfunction, and shock people. Static electricity can also cause clothing to cling together or hair to stand on end, which can be annoying but is generally harmless.

Learn more on static energy here: https://brainly.com/question/18562731

#SPJ1

Answer:

What separates athletes from their competitors is the word itself, separation — gaining it on the offensive side, or taking it away on the defensive side (There are exceptions of course, one being the contest of offensive linemen and defensive linemen in football where the inverse is true). Speed, strength, and power are great ways to create separation in sports. However, speed, strength, and power all have genetic ceilings

Explanation:

if it is just defined as geometric sequence

an = an-1 × 0.8

then infinitely many. that way we will never reach 0 velocity. the sequence will go on in all eternity with the next velocity being 80% of the previous velocity. and 80% of that. and so on.

it will get closer and closer to 0 but never reach it.

under normal (natural, physical) circumstances we need a stop criteria, like the minimum velocity for a bullet to penetrate such a plank.

once we have that, we can calculate (initial velocity × 0.8^n < minimum velocity) after how many planks (n) the bullet reaches that velocity. and that gives us the number.

Passive solar heating utilizes design and natural processes to capture and distribute solar energy without mechanical devices, while active solar heating uses mechanical systems to collect and distribute solar heat, requiring external energy inputs.

Passive solar heating and active solar heating are two different approaches to utilizing solar energy for heating purposes. Here's a brief explanation of each:

1. Passive Solar Heating:

Passive solar heating refers to the design and use of building materials to capture, store, and distribute solar energy without the use of mechanical or electrical devices. It relies on natural processes and elements to maximize solar gain and heat transfer. Some common passive solar heating techniques include:

Passive solar heating systems do not require active mechanical components like pumps or fans and are generally considered more energy-efficient and cost-effective.

2. Active Solar Heating:

Active solar heating involves the use of mechanical and electrical devices to collect, store, and distribute solar energy for heating purposes. It typically utilizes solar collectors, such as solar panels or solar thermal systems, to capture sunlight and convert it into heat energy. The collected heat is then transferred to a heat storage system or directly used to provide space heating or water heating. Active solar heating systems may involve pumps, fans, and controls to circulate the heated fluid or air throughout the building.

Active solar heating systems require external energy inputs, such as electricity for powering pumps or fans, and often involve more complex installation and maintenance compared to passive solar heating. However, they can offer greater control and efficiency in heating applications, especially in larger or more demanding spaces.

To know more about solar heating systems refer here :    

https://brainly.com/question/32407190#

#SPJ11            

You must walk approximately 137.74 meters farther to reach your truck.

To determine how much farther you must walk to reach your truck, we need to calculate the distance between your current location and the truck.

Let's break down the given information: You are initially 122.0 m away from your truck, in a direction 58.0 degrees east of south.

You then walk 73.0 m due west along a ditch.

To find the remaining distance to the truck, we can consider the triangle formed by your initial position, your current position after walking west, and the truck location.

From the given information, we have a right triangle where the side opposite the 58.0-degree angle is 122.0 m and the side adjacent to the 58.0-degree angle is 73.0 m.

Using trigonometry, we can find the remaining distance (x) by applying the cosine function:

cos(58.0 degrees) = adjacent / hypotenuse

cos(58.0 degrees) = 73.0 m / x

Rearranging the equation to solve for x:

x = 73.0 m / cos(58.0 degrees)

Calculating the value:

x ≈ 73.0 m / 0.530

x ≈ 137.74 m

Therefore, you must walk approximately 137.74 meters farther to reach your truck.

know more about cosine function here

https://brainly.com/question/11114429#

#SPJ11

Please find attached photograph for your answer. Please do comment whether it is helpful or not.

Answer:

The value of g on the moon is 1.625 m/s2 and the value of the g on the jupiter is 2.528g.

Jupiter's surface gravity is 24.79/s or 2.528 g .

The acceleration due to gravity on the surface of the moon is approximately 1.625m/s .

hope this helps you

mrk me braniliest plzz

Answer:

srry

Explanation:

Answer:

Below

Explanation:

Surface waves cannot pass through the Earth's mantle but travel along the Earth's crust. They are more destructive than body waves.

Have a good night ((:

The main difference between body waves and surface waves is that Surface waves cannot pass through the Earth's mantle but travel along the Earth's crust. They are more destructive than body waves, therefore the correct answer is option B .

The Equator is an imaginary line passing through the middle of a globe. It is equidistant from the North Pole and the South Pole, Its is a horizontal line residing at 0 degrees latitude.

As given in the problem statement we have to find out the difference between body waves and surface waves.

The major distinction between surface waves and body waves is that surface waves move over the Earth's crust rather than through the mantle of the planet. They are more damaging than body waves, thus choice B is the right response.

To learn more about the equator here, refer to the link given below ;

brainly.com/question/24203207

#SPJ2

Liquid crystal visual occlusion spectacles use electrical energy to provide either full or occluded vision.

These spectacles work by applying an electric current to a layer of liquid crystal, which then changes its orientation and controls the amount of light that passes through, allowing for full or occluded vision depending on the user's needs.

When the spectacles are turned on, the liquid crystals align and become opaque, blocking the wearer's view.

When they are turned off, the liquid crystals become transparent, allowing the wearer to see clearly.

This technology is often used in aviation, sports, and military applications to enhance situational awareness and improve safety.

To know more about electrical energy, refer here:

https://brainly.com/question/863273#

#SPJ11

Answer:

Ultrasound imaging (sonography) uses high-frequency sound waves to view inside the body.

Explanation:

Answer: if the door knob is metal the static electricity will exit your body, but shock you in the process

Explanation:

Explanation:

The teacher said to the students you can go home.

Into indirect speech

The teacher told the students that they could go home.

Hope it will help :)❤

Radio waves traveling through the ionosphere at high latitudes experience quick and unpredictable oscillations, which is known as high-latitude scintillation.

The auroral border, or area of the ionosphere where the aurora borealis (northern lights) appear, is typically connected with scintillation. However, high-latitude scintillation can occasionally be seen equatorward of the auroral boundary depending on the circumstances. The cause of this phenomenon is the presence of ionospheric irregularities that go beyond the auroral oval, such as irregularities in plasma density brought on by equatorial spread F (ESF). ESF can produce significant ionosphere-wide anomalies that lead to scintillation at lower latitudes. This may occur when the sun is active more intensely or when particular ionospheric circumstances favor the production of these anomalies.

To know more about ionosphere, here

brainly.com/question/30764330

#SPJ4

Maximum resultant pulse will be 22.36 cm, if the amplitude of pulse A is 20 cm, and that of pulse B is 10 cm.

Equations of two superimposing waves with a phase difference of π/2, are:

y₁ = a₁sin(ωt) and y₂ = a₂sin(ωt + π/2) = a₂cos(ωt)

The equation of the resultant wave will be:

y = y₁ + y₂

y = a₁sin(ωt) + a₂cos(ωt)

Assuming a₁ = acos(Φ),  a₂ = asin(Φ)

So, y = asin(ωt+Φ)

(a₁)² + (a₂)² = a²(sin²Φ + cos²Φ)

(a₁)² + (a₂)² = a²

a = √((a₁)² + (a₂)²)

a = √(20²+10²)

a = √500

a = 22.36 cm.

To know more about amplitude, here

https://brainly.com/question/2845956

#SPJ4

Answer: Its B. There will be 0.031 kg left after 151 years,

Explanation: Im doing my assessment right now.

The half-life of Cs-137 is 30.2 years. If the initial mass of the sample is 1.00 kg, the mass remain after 151 years is 0.031 Kg.

Caesium-137, or radiocaesium, is a radioactive isotope of caesium that is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes.

Cs-137 is used in medical radiation therapy devices for treating cancer.

The half-life is the amount of time it takes for a given sample to lose half of the original amount or the time for radioactive substance to decay. The half-life of Cs-137 is 30.2 years.

Decay constant of radioactive substance is its probability of decay per unit time.

In this case,

Mass of sample is 1 Kg

Half-life of Cs-137 is 30.2 years

The elapsed time is 30.2 years.

This means, one half-life is elapsed, the half of sample will decay in 30.2 years. Therefore, the half of the original substance will remain in 30.2 years which is 0.500 Kg. After another 30.2 years, it will be 0.250 Kg. And after 151 years, it will be 0.031 Kg.

To learn more about Cs-137 here

https://brainly.com/question/7004414

#SPJ2

The statement that describes the magnetic field inside a bar magnet is as follows: it points from north to south.

A bar magnet is a permanent magnet of rectangular shape.

A magnet generally possess a magnetic field, which is a condition in the space around a magnet which there is a detectable magnetic force and the presence of two magnetic poles.

A bar magnet like every other magnet possesses a magnetic field that points from the north pole to the south pole.

Learn more about magnets at: https://brainly.com/question/13026686

#SPJ1