The ball at the top of the ramp has potential energy but when it rolls down or when it is rolling down it has kinetic. The ball has kinetic energy when it is moving or rolling down the ramp but there is Potential energy when the ball is at the top or is sitting at the bottom still. when the ball is rolling down the ramp it has heat energy because of how it get speed and it starts to heat up.
Answer:
The energy of the ball is transformed from potential energy to kinetic energy when it is released at the top of the ramp. When the ball rolls down the ramp, kinetic energy increases and potential energy decreases. The law of conservation of energy says that energy can not be created or destroyed, it can be tranformed or transferred. The total energy of the ball stayed the same because potential and kinetic energy are inversely related.
Explanation:
From the top of a cliff, a person tosses a pebble straight downward with an initial velocity of -9.0 meters/second. After 0.50 seconds, how far beneath the cliff is the pebble?
a) -2.0
b) -3.9
c) -5.7
d) -10.3
Which statement describes what happens when Bret runs up a flight of stairs?
His kinetic energy increases.
His potential energy decreases.
His kinetic energy is converted into potential energy.
His potential energy is converted into kinetic energy.
Answer:
The answer is C) His kinetic energy is converted into potential energy.
Study the following ocean currents map.
Which statement is most likely correct about the average temperatures in San Diego, California as compared to Savannah, Georgia?
It is higher in Savannah because of the cool ocean currents from the south.
It is higher in Savannah because of the warm ocean currents from the north.
It is lower in San Diego because of the warm ocean currents from the south.
It is lower in San Diego because of the cool ocean currents from the north.
The statement is most likely correct about the average temperatures in San Diego, California as compared to Savannah, Georgia is;
Option D: It is lower in San Diego because of the cool ocean currents from the north.
From the map, we see two locations namely;
San diego and Savannah.
Now, upon careful observations of the current direction at San Diego , we see that the current is moving from the north towards the equator and as such we till term it as cool ocean currents.
However, in Savannah, the direction of the currents is away from the equator and as such we will call it warm currents.
In conclusion, since cool currents are coming to San Diego, it will have a lower temperature than at Savannah.
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What can happen when the earths plates slide past each other?
All charged objects create an electric field around them. What two factors determine the strength of two electric fields upon the charged objects creating them?
A.) how charge the object creating the field is and the mass of the two charged objects
B.) how charged object creating the field is and the distance between the two charged objects
C.) how charged object creating the field is and whether the objects are positively or negatively charged
D.) how charged object creating the field is in the density of the two charged objects
Chalk is an ionic compound. Which is a property of all ionic compounds that makes chalk particularly useful for writing on a chalkboard?
Answer:
Hardness and brittleness
Explanation:
Ionic substances form crystal lattices which allow the compounds to be hard because of the strong attractions between positive and negative ions in the lattice. When pressure is applied to the compound like chalk , it may force ions of the same charge together ( i.e. positive to positive). This is called electrostatic repulsion which is able to break the crystal lattice allowing one to write on the chalkboard.
Mass m, moving at speed 2v, approaches mass 4m, moving at speed v. The two collide elastically head-on. Find the subsequent speed of mass, m and 4m.
If an electric train is travelling south, which way is the smoke going?
watches a 2000 klilogram car crash into a wall with a force of 30000 newtons. what is the acceleration of the car at impact?
Why might the 1990 earthquake and volcanic eruption in Luzon be related?
A) Both earthquakes and volcanic eruptions are caused by plate tectonics and can
occur in patterns.
B)Earthquakes occur in San Francisco but not in Chicago.
C) Tectonic plates can form deep ocean trenches, such as the Mariana Trench in the Pacific Ocean.
D) On April 2, Mount Pinatubo sent an explosion of steam, water, ash, and rock into the air.
Answer:
Answer: C
Explanation:
Calculate the density if the mass of a solid material is measured as 15.00 grams and its volume is measured as 5.0 cm3? round off your answer to the proper number of significant figures
Answer:
3.0 gm/cm³
Explanation:
Given,
Mass of solid material (m) = 15.00 grams
volume of the material (v) = 5.0 cm³
We know that density is
[tex]= \frac{mass}{volume}[/tex]
Thus the density of the material is
[tex]= \frac{m}{v}[/tex]
[tex]= \frac{15.00}{5.0}[/tex]
[tex]= 3.0[/tex]
Thus the density is 3.0 gm/cm³.
what two properties show that a drink is a fluid
Answer:
Two properties that show that the drink is a fluid/liquid include its retention of volume and its conformation to the shape of its container.
Explanation:
What is the kinetic energy of a 478 kg object that is moving with a speed of 15 m/s
Answer:
107,550 J
Explanation:
Kinetic energy = 1/2 * mass * velocity^2
In this case, the mass of the object is given as 478 kg and the speed is given as 15 m/s.
Plugging these values into the formula, we get:
Kinetic energy = 1/2 * 478 kg * (15 m/s)^2
Simplifying the equation, we have:
Kinetic energy = 1/2 * 478 kg * 225 m^2/s^2
Multiplying the numbers together, we get:
Kinetic energy = 107,550 kg*m^2/s^2
Simplifying further, we can express the unit of kinetic energy as joules (J):
Kinetic energy = 107,550 J
5 different types of evidence that show a chemical reaction has taken place
The evidence that shows that a chemical reaction has taken place is an alteration in odor a shift in color, a temperature shift, The emission of light or heat, and the formation of gasses or precipitates.
What is a Chemical Reaction?One or more compounds, known as reactants, convert into one or more new ones, known as products, during a chemical reaction. Substances are made up of chemical building blocks or compounds.
Chemical interactions play some sort of role in technology, culture, and even life itself. For thousands of years, people have understood and used chemical reactions in a number of processes, such as burning fuels, smelting iron, making glass and pottery, brewing beer, producing wine, and making cheese.
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How is our planets giant,thermohaline system of warm and cold water like a massive convection current
What does the phrase rise over run refer to when defining slope
As you know, the oceans are a complex system that covers most of the earth, and contains a huge amount of resources. Protecting these resources is one reason to try and prevent the pollution of the oceans.
Algae is one ocean resource in particular that is vulnerable to pollution. The algae are a valuable resource because they absorb carbon dioxide from the atmosphere and release ____________ into the atmosphere.
A) oxygen
B) nitrogen
C) water vapor
D) carbon monoxide
Algae are green in color because they have chlorophyll. It captures sunlight and Carbon dioxide from the atmosphere and undergoes chemical reaction to produce food and Oxygen as a product. Since, there is no way to store the Oxygen gas in the algae, it releases the Oxygen to the ocean and atmosphere. This oxygen is used by all the aquatic and land animals which live on earth.
A star is born when gas and dust from a nebula become so dense and hot that nuclear fusion starts. Which of the following forces is responsible for the formation of a star?
A.
friction
B.
gravitation
C.
magnetism
D.
electromagnetic energy
Answer: B. gravitation
Explanation:
Nebula is a stellar nursery. It is composed of dust and gases. This molecular cloud condenses under its own weight and forms a core which spins and gathers more mass due to gravity. This causes temperature and pressure to rise which kicks in the nuclear fusion reaction and a star is said to be born.
Thus, gravitation is responsible for formation of star.
Can protons be gained or lost in an element?
predict which will fall to the ground faster a crumpled paper or flat sheet of paper
Why is it that auroral displays above Colorado can be forecast several days in advance?
Describe a situation in which the displacement f a roller skater is 0 km, but the distance traveled is 2 km.
Which of the following is true about the solar system?
A.
Most of the planets have moons.
B.
Earth is the only planet that has a moon.
C.
None of the planets have moons.
D.
All of the planets have moons.
PLEASE ANSWER VERY IMPORTANT
A good scientist keeps an open mind to every idea and explanation, even if they do not appear to be relevant to the outcome of the current experiment
The mixture use separated was a mixture of iron feelings sand and salt based on your understanding of matter is this mixture a homogenous or mixture or heterogenous mixture
if a plane was flying at a speed of 400 km/ hr and 2 min later has slowed to 100 km/hr to land what is the acceleration
A student performs a lab measuring the velocities of toy cars of different masses
Answer:
Car 1 and Car 2
Explanation:
5 2.2 11
5.5 2 11
6 1.35 8.1
6.5 1.9 12.35
7 1.35 9.45
What are some tools that are used for tornadoes
The Greek philosopher Democritus coined what word for a tiny piece of matter that cannot be divided?
A - Element
B - Atom
C - Electron
D - Molecule
Two objects are dropped from a bridge an interval of 1.0s apart. Air resistance is negligible. During the time that both objects continue to fall, their separation increases.
Can someone explain why it increases, instead of staying constant?
If the two objects are dropped at 1.0 s time interval, their velocity will increase as they descend which will cause their separation distance to increase because velocity is directly proportional to displacement.
The rate at which each object falls is influenced by their respective weights. If air resistance is negligible, gravity will continue to pull each object until it hits the ground.
The influence of gravity will cause the following:
The speed of each object will increase gradually until it hits the ground, and each object will have maximum velocity before it hits the ground. This shows that velocity of each object increases as it descends.Velocity is directly proportional to displacement, as the velocity of each object increases, the distance between them will also increase.Thus, if the two objects are dropped at 1.0 s time interval, their velocity will increase as they descend which will cause their separation distance to increase because velocity is directly proportional to displacement.
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