What would happen if you touched an object that is the same temperature as your hand? Would any heat transfer happen? Explain your answer in 4-5 sentences.
Answer:
It actually depends.
Explanation:
in the case of a metal ur hand will absorb the heat (but it depends on the temperature, this ans favours hot and cold but not neutral or room temperature), in the case of human to human I think no heat transfer will take place, in the case of liquids(for hot temperature ,it would even for cold but not room).
It basically involves application
A 1000 kg boulder sits at the top of a 50-meter high cliff. Determine the amount of potential energy possessed by the boulder if the acceleration due to gravity is 9.8 m/s2. The boulder has_______(magnitude/ number)_______(units) of Potential Energy.
Answer:
490000J
Explanation:
Given parameters:
Mass of boulder = 1000kg
Height of cliff = 50m
Acceleration due to gravity = 9.8m/s²
Unknown:
Potential energy = ?
Solution:
Potential energy is due to the position of a body. It is expressed as;
P.E = mgH
m is the mass
g is the acceleration due gravity
H is the height
Now insert the parameters and solve;
P.E = 1000 x 9.8 x 50 = 490000J
Data:
m = 1000 kg
h = 50 m
g = 9.8 m/s^2
Find:
P.E = ?
Formula:
P.E = mgh
Solution:
P.E = mgh
P.E = (1000)*(9.8)*(50)
P.E = 490000 J
Result:
P.E = 490000 Joule
How can you tell if science is supported? Or real?
Answer:
long answer so its below lol
Explanation:
You can tell if the science is "real" or supported based upon if there have been multiple experiments showing the same/smiliar answer, it has been proven by professionals, or if the science is published by professionals and such
Answer:
hold up ill see
Explanation:
dont know this tho
Does knowing the origin of velocity help you understand the difference between speed and velocity?
Which device converts the mechanical energy of a spinning magnet into electrical energy?
The density of aluminum is 2.7 gm/ cm3 and iron is 7.8 gm/ cm3. If both metals have the same value of mass i.e. 10 gm, which metal will have more volume?
Answer:
27
Explanation:
27
Thermal energy is transferred to a substance. Which change can occur?
Answer:
The temperature scale on which water freezes at 0 and boils at 100. Thermal energy that is transferred from one substance to another; moves from warmer to cooler objects. The transfer of heat by direct contact; occurs when energy is transferred by collisions between particles.
Explanation:
When thermal energy is transferred both kinetic and potential energy increases.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
These vibrating molecules and atoms collide and as a result of which heat is generated in a substance , more the collision of particles , higher is the thermal energy.There are three types of thermal energy transfer:1) conduction 2) convection 3) radiation
Learn more about thermal energy,here:
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PLEASE HELP ASAP BEST ANSWER WILL BE MARKED BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The total mass of a pizza is 160 grams. When the pizza is cut into pieces, what parts equal the whole?
10 grams, 30 grams, 40 grams, 40 grams, and 30 grams
25 grams, 25 grams, 25 grams, 25 grams, and 25 grams
30 grams, 30 grams, 30 grams, 30 grams, 40 grams
50 grams, 30 grams, 30 grams, 30 grams, and 10 grams
Answer:
It is the 3 one
Explanation:
If a ray hits a plane mirror at 45 degrees, what angle will it bounce off at?
Answer:
up towards space lol it's 190
Explanation:
I will pick the most Brainliest but... i need u to tell me how too
What happens when a penny is dropped from a height of 20 meters?
A. The force of gravity causes it to accelerate.
B. Its mass doubles for every second it falls.
C. It changes direction every 9.8 meters.
D. It falls at a constant velocity.
Answer:
I think it’s a
Explanation:
Answer:
It will accelerate option A
Explanation:
When you drop anything it will continue to accelerate untill it reaches a max speed or friction forces it to slow down or stop.
What does the Law of Conservation of Momentum stare about the momentum in a system in an inelastic collision?
Answer:
The law of momentum conservation can be stated as follows. For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
Explanation:
Answer:
For any collision occurring in an isolated system, momentum is conserved. The total amount of momentum of the collection of objects in the system is the same before the collision as after the collision.
Explanation:
Go around your house and hit (or tap) ten different objects. The objects should be different shapes and made of different material (choose things to hit that won’t break!). Each object is a different medium for sound. Try to hit each using the same amount of energy. Describe each object that you hit. What is its shape and what is it made of? Then describe how it sounds to you. Does it transmit sound well? Does it absorb sound? Is the sound loud or soft? Is there a “ring” to the sound? Does it sound like a “thunk” or does it sound like a drum? Rank the ten objects from loudest to softest. Draw some conclusions based on your results from Steps 1 and 2. For example, are there a certain shapes or materials that are better or worse media for sound travel?
Answer:
Explanation:
ball ( it sound like thup thup it is softly harsh in voice )
book ( tak tak it is hard in voice )
bed ( pat pat it is soft in voice )
Door, window, picture, floor,stairs, wall, desk, backpack, paper, bed all of these produce different sound.
What do you mean by sound?The term sound is defined as an acoustic wave is a vibration that travels through a gas, liquid, or solid transmission medium. In terms of human physiology and psychology, sound is the brain's receipt of these waves and perception of them.
A mechanical disturbance that causes an equilibrium condition to be disturbed and propagates by an elastic material medium.
The vibration of an object creates sound, which travels from one place to another by a medium. Vibration is the phrase used to explain an object's to-and-fro or back-and-forth motion. Vibrations are generated by objects in motion.
Therefore, stairs, wall, door, window, picture, floor, desk, backpack, paper, bed all of these produce different sound.
To learn more about sound, refer to the link below:
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Which object would have the most momentum?
A.a 500-pound car moving at 20 miles per hour
B.a 200-pound car moving at 60 miles per hour
C.a 100-pound car moving at 80 miles per hour
D. a 50-pound car moving at 100 miles per hour
Answer:
B
Explanation:
Momentum is the product or multiplication of a body's mass and its speed.
Since all options have the mass and speed in the same units, there is no need for conversion.
A. 20 x 500 = 10000, B. 200 x 60 = 12000
The same goes for the rest!
Which excerpt from The Number Devil best conveys that the author's purpose for writing is to entertain?
Answers:
A. Well, in the middle of the night, still woozy with sleep, he staggered down to the basement in his pajamas, and what did he find next to the wine cabinet?
B. "Most genuine mathematicians are bad at sums. Besides, they have no time to waste on them. That's what pocket calculators are for."
C. "Just as there are infinitely large numbers, there are infinitely small numbers. And an infinite number of infinitely small numbers."
D. "Wrong!" the number devil shouted, his mustache quivering, his eyes bulging, and his face turning red with rage
Answer:
I think it is c
Explanation:
can someone help me with this please