Roseanne heated a solution in a beaker as part of a laboratory experiment on energy transfer. After a while, she noticed the liquid solution began to circulate within the beaker. What process involving heat transfer did Roseanne observe inside the beaker?
A snowmobile has an initial velocity of 3.0 m/s Part 1: If it accelerates at the rate of 0.5 m/s/s for 7.0 sec, what is the final vel.? Part 2: If it accelerates at the rate of -0.60m/s/s, how long will it take to reach a complete stop?
As we know that
here we know that
so we will have
if finally the snowmobile comes to rest
So here we can say that
so now we have
where Q is the energy lost,
c is the specific heat of water,
m is the mass of water involved,
so m=3.75 *10^-1 Kg
delta t=37.5 °C
I hope my answer has come to your help. God bless and have a nice day ahead!
1. How many correct experiments do we need to disprove a theory? How many do we need to prove a theory? Explain. 2. A guidebook describes the rate of climb of a mountain trail as 120 meters per kilometer. How can you express this as a number with no units?
2. change the meters to kilometers;
120 m/km = .12 km/km = .12
or the kilometers to meters;
120 m/km = 120 m/1000m = .12
This sounds like its telling you how far you climb vertically (.12 km) for every 1 km that you walk along the slanted, winding trail.
The unitless number ".12" is usefull because now you can think of the rate of climb in any units you want. So you rise vertcally .12 miles for every mile you walk the trail, or you rise .12 ft for every foot you walk the trail, etc.
the answer is d i just took the test k 12 right
Which is an example of transforming potential energy to kinetic energy? Check all that apply. changing thermal energy to electrical energy changing chemical energy to thermal energy changing nuclear energy to radiant energy changing radiant energy to electrical energy changing mechanical energy to chemical energy
All of the following are possible sources of error in a scientific investigation except for A. Measuring the change in temperature incorrectly B. Manipulating the wrong variables in the experiment C. Reviewing previously published studies before the experiment D. Completing only one trial in the experiment
Your answer would be C my friend
Earth's core is composed of two separate layers the inner core and the outer core what is one difference between these two layers? F. One is orphans one is zinc G. One is liquid and one is gas H. One is solid and one is liquid I. One is iron and one is nickel
Answer: Option (b) is the correct answer.
Plasma is a hot ionized gas that contains approximately equal number of both positive ions and negatively charged electrons.
Thus, we can conclude that if a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a plasma.
Alai is comparing the physical property of two materials. He is hitting each with a hammer to observe what happens. What physical property of the materials is Alai most likely observing? solubility conductivity hardness odor
Answer: Alai is most likely observing the hardness of the materials.
Explanation: Hardness is defined as the property of a material to resist a change in its structure when applied to a external force.
Hard materials will not change their shape when they are hit with a hammer whereas soft materials will change their shape when they are hit with a hammer.
There are two ways the Scientific and the Normal.( for a lack of better word)
Normal: The heat escapes into space.
Scientific: As the molecules of the element heat up and vibrate for long periods they lose heat so they return to their original temperature (at least try to)
hope this helps you
The difference between temperature and thermal energy is that temperature measures the average kinetic speed of molecule and thermal energy is the total kinetic energy of all particles in a given substance.
What happens when the electron moves from the first energy level to the second energy level? Energy is absorbed, and an emission line is produced. Energy is released, and an emission line is produced. Energy is absorbed by the atom. Energy is lost from the atom.
Emission lines occur only in the case of transitions from higher to lower energy levels in which energy is emitted.
The water has potential energy when it is at the top of the falls which is converted into kinetic energy as it falls.
1. Which of the following is NOT part of John Dalton's atomic theory? A. All elements are composed of atoms. B. All atoms of the same element have the same mass. C. Atoms contain subatomic particles. D. A compound contains atoms of more more than one element. 2. Who provided evidence for the existence of a nucleus in an atom? A. John Dalton B. J. J Thomson C. Democritus D. Ernest Rutherford
His theory did not incorporate the existence of subatomic particles.
Which of the following is true of both nuclear fusion and nuclear fission? a. They both require a high energy input. b. They both occur without byproducts. c. They both have a high energy output. d. They both involve large atoms breaking into smaller atoms.
Both processes release tremendous amounts of energy.
B. Greater energy
Fast moving water is very energetic as its can displace very large rocks, boulders and make pebbles and sand out of them through the process r erosion. Fast moving water have kinetic energy, it opposes anything that come in its way. As river make its own channel by eroding plane. Many antecedent rivers have make their channel by cutting large mountains too.
Correct answer choice is :
B) That could not be divided.
Democritus was a Greek scholar who lived within 470-380 B.C. He elaborated the theory of the atom, Greek for permanent. Democritus thought that everything in the world was made up of atoms, which were tiny and durable. They assumed that matter was made up of very small particles. They named these particles atoms, which comes from an antique Greek word signifying permanent. These atoms were supposed to be absolutely indivisible and forever.