Answer:
You may be saving someone from a rock slide, where the rocks will fall at any time, before they fall they have potential energy.
Explanation:
a) Find the energy needed to heat a tank holding water of 60 kg to rise the temperature from 10 degree Celsius to 60 degree Celsius (c=4200 j/Koc)
b)find the time for rising this much temperature if the power of heater is 3kW
Answer:
a) Q = 12600000 [J]
b) t = 4200 [s] or 70 [min]
Explanation:
To solve this problem we must use the following equation that is defined as the heat equation, this equation relates the mass to the specific heat and temperature changes.
Q = m*Cp*(T_f - T_i)
where:
Q = energy as heat [J] (units of Joules)
Cp = specific heat = 4200 [J/Kg * °C]
T_f = final temperature = 60 [°C]
T_i = initial temperature = 10 [°C]
m = mass = 60 [kg]
Q = 60*4200*(60 - 10)
Q = 12600000 [J]
b)
To calculate the time, we know that the power is equal to the energy generated over the given time.
P = Q/t
where:
P = power = 3000 [W]
t = time [s]
t = Q/P
t = 12600000/3000
t = 4200 [s] or 70 [min]
Brainliest whoever answers first!!! and right!!! Identify the situations that have an unbalanced force. Check all that apply. a weight speeds up as it falls through the air a garbage can is at rest on the ground a hockey puck moves in a straight line at a constant speed a bumper car hit by another car moves off at an angle a balloon flies across the room when the air is released
Answer:
its A,D,E
Explanation:
I got 2 right one of them wrong
Answer:
A baseball speeds up as it falls through the air.
Yes. Forces on the balloon are unbalanced.
The balloon is speeding up, so we know that the downward force
of gravity is stronger than the upward force of air resistance.
A soccer ball is at rest on the ground.
No. The ball is not accelerating, so we know that the forces on it
are balanced.
The downward force of gravity on the ball and the upward force
of the ground are equal.
An ice skater glides in a straight line at a constant speed.
No. The skater's speed and direction are not changing, so he is not
accelerating. That tells us that the forces on him are balanced.
A bumper car hit by another car moves off at an angle.
Yes. The direction in which the car was moving changed.
That's acceleration, so we know that the forces on it are unbalanced,
at least at the moment of impact.
A balloon flies across the room when the air is released.
Yes. The balloon was not moving. But when the little nozzle was
opened, it started to zip around the room. So its speed changed.
And, as it goes bloozing around the room, its direction keeps changing too.
There's a whole lot of acceleration going on, so we know the forces on it
are unbalanced.
Explanation:
HELP!!!!!
Which of the following is a type of wave that travels at a right angle relative to the direction of motion? (2 points)
Select one:
a. Amplitude
b. Longitudinal
c. Propagated
d. Transverse
Answer:
Transverse Wave
Explanation:
Longitudinal: vibrates in the same direction
Propagated: the direction the wave travels (specific to wave type)
Amplitude: from equilibrium to crest or trough
What happens to the TOTAL energy when energy is transferred from potential energy to kinetic energy and then from kinetic energy back to potential energy ?
Please help!!
Answer: the answer to the question is B
Because of the fact that it keeps switching, from kinetic to potential, and again from potential to kinetic, as a result, while it is moving around in motion, it will lose energy.
:D
Best of Luck!
Help! Urgent! Question is in the screenshot. Also, please include units! Thanks...
The bell rings and a physics student heads to class. They stop to talk to a few friends. They slow
down to look at a poster on the wall. They get to class just as the bell rings. In the 5 minutes it took
them to get to class, their average speed was 1.4 m/s. How far did they walk?
Answer:
420m
Explanation:
Given parameters:
Time = 5minutes
Average speed = 1.4m/s
Unknown:
Distance covered = ?
Solution:
Speed is the rate of change of distance with time.
Mathematically;
Speed = [tex]\frac{distance}{time}[/tex]
Distance = speed x time
Insert the parameters and solve;
Convert the time to seconds;
1 minute = 60s
5 minute = 5 x 60 = 300s
So,
Insert the parameters and find the distance;
Distance = 300 x 1.4 = 420m
HElP I NEED TO turn this in
A science class breaks into four groups and tests the pH of the soil surrounding the school. Each group goes to an area that is three meters squared (3m2) in size and tests the soil four different times within that square. The data collected is then placed into a table for everyone to see as shown below.
Four students draw the following conclusions from the data
Student 1. Group D's data should be discarded because it is not similar enough to the other groups' data
Student 2: There must be something near the parking lot that causes the pH of the soul to be higher and the class should design a new experiment to determine whether
Student 3. There are definitely more magnesium ions in the soil near the parking lot, and that is why the pH of the soil is higher there
Student 4. The pH of the soil in the ball field should be measured again because no two readings were identical
Which student's conclusion is scientifically valid based on the data in the table above? A. Student 1 B. Student 2 C.student 3 D student 4
molecular compounds do not conduct electrify because they
a. break up into irons
b. do not break up into ions
c. do not dissolve in water
d. have high melting points
if you guess right I'll mark you brainliest
Answer:
a
Explanation:
Answer:
b. do not break up into ions
Explanation:
molecular compounds don't break up into ions when dissolved or melted.
A Ford Mustang was at a stop sign. The driver then stepped on the gas pedal and within 6 seconds was travelling at 36 m/s. What was the rate of acceleration?
A. 36 m/s²
B. 216 m/s²
C. 10 m/s²
D. 6 m/s²
Answer:
D. 6 m/s²
Explanation:
Given parameters:
Initial velocity = 36m/s
Final velocity = 0m/s
Time taken = 6s
Unknown:
Acceleration of the car = ?
Solution:
Acceleration is the rate of change of velocity with time;
Mathematically;
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time
Acceleration = [tex]\frac{0 - 36}{6}[/tex] = -6m/s
The acceleration of the car must have been 6m/s²
HELPPPP LOOK AT THE SCREENSHOT TO ANSWER THE QUESTIONS
17. Which object or objects are traveling at a constant velocity?
1. A
2. B
3. C
4. D
5. E
18. Which object is accelerating?
1. A
2. B
3. C
4. D
19. Which object or objects are sitting still?
1. A
2. B
3. C
4. D
5. E
20. On average, which object is traveling at the fastest velocity?
1. A
2. B
3. C
4. D
5. E
Answer:
Explanation:
Is this a velocity time graph?
Can some one plz help me with this Im kinda busy today and this is due today!
Write a 5-6 paragragh essay about >>
You have been given the chance to spend a day with a famous person of your choosing. This person may be a character from a book, a movie, television or some other source. Why did you choose the person you did? Why is meeting with this person important to you?
Write a narrative about the time you spent with the famous person you have chosen.
Answer:
Ryan Upchurch
For many years I have learned a lot of things about him, Upchurch music, and his crazy aspects of life. And If there was A day then I got a list of things to do with him. First things first or me this is a hard question for a part of me would like to sit down with Ryan in a boardroom and discuss humanitarian ideas and share my opinions with them.
A part of me would like to go back in time and talk with the only person I wanted an autograph from, Katie Noal I would discuss her concepts in her songs, ask if I could get some pointers, and finally ask her to sing one of her songs.
But then again Ryan does not like her so it would only be fair to spend the day with him., she is amazing and I love her humor. And he is sharp and quick as a whip. My time with him would leave me busting a gut laughing so hard. It would be on my bucket list of things to do.
Now at this time, I would eat some chicken some good fried chicken with some mash potatoes his wife would have made. You know he is just a funny person he has a comedian personality, it would be a joyous time to spend with him. Then we would take a drive and he can show me where he grew up and some crazy memories or life lessons on the way. And explain some of his songs to me like my favorite ¨Vinyl¨.
I would ask Ryan where he took his plots from and what his aspects are of life and who inspired him along the way. Or to just do nothing and have almost forgotten how to think; for picturing in his mind, and for writing his songs for all of us to enjoy. A proud man who wanted to become invisible but the accomplished task did not bring him happiness and instead brought him Fame.
I would be especially interested in asking him about “Everlasting country¨. Who was that person or what were the events, which prompted him to create an image of severe, almost help of countless operations in the country and America. However, Upchurch and I would go very soon they forget everything they were taught and… over and over again. If I could spend the day with him I hope that we could go mudding and just enjoy him.
I am always interested in the way that how he writes his songs and express how he feels about America. Now I would love to help him write a song and I would call It ¨Country time love¨. After all that we would sit and enjoy the campfire and eat some Smores :) Or I would ask him when and how he preferred to write, whether his stories were long in the making etc.
And finally, the last question that I would ask Ryan Upchurch is to compare his time with the other singers and analyze if any of his most gloomy predictions have come true about how he see life. Of course, Upchurch will hardly consider the agenda, and modern achievement such high standards for people. After that long day with him, I would think of him for everything we had done for the day. Maybe he would understand how I feel about the way I see life and how he has changed the way I look at life. That he would develop and these events would happen some time so he was able to make a song putting it as me and his song. Cause that would be very exciting! I hope that maybe this day will come and I will get to remember that day and hope that I will get to see him again like go to a concert or just hang out for the day.Therefore If I spent a day with Ryan I would Eat some chicken go mudding and sit by the fire and enjoy some good music.
Explanation:
Answer:
If I were given a chance to meet anybody who has ever lived and spend the whole day talking to that person, I would choose the French Queen Marie Antoinette. The reason for my choice is not her extraordinary talents or achievements; instead, I am interested in how an ordinary woman could have made it through the turmoil of the dark times for the French monarchy, a difficult marital relationship and never lose her sense of dignity.
I admire Marie Antoinette first of all for having endured the challenge of spending all or most of her time in public when she was still the wife of the French dauphine when she had to “on my rouge and wash my hands in front of the whole world” (Wikipedia, 2006). To a certain degree, each of us has to endure the challenge of being in public with one’s thoughts and feelings, and I would ask her how she was able to withstand this trial. I would also ask her how she managed to remain modest and nice to people surrounding her so that Jeanne Louise Henriette Campan in his memoirs remembered of her as “unwilling … to be reminded of her elevation” (Campan, 2004, p. 10).
I would want to see the person who, by will of chance, was lifted to the highest position a woman could command in Europe of those times, yet remained affable and pleasant to her subordinates and unwilling to impress herself on them and humiliate anybody at a time when it was all too common in the nobility.
If we had a chance to talk at length with Marie Antoinette, I would also ask her what she considers to be her mistakes at court and how she would have corrected them if given a chance. She surely had quite a few, but, after all, historian Simon Sebag Montefiore could have been right saying that Marie Antoinette was “a woman more sinned against than sinning” (Wikipedia, 2006). I am interested in learning what she thought of her life when it came to such a disastrous end as the execution in the French Revolution. Did she blame the crowd? Or was she reproaching herself for not having done more to protect her image in the eyes of the people? Marie Antoinette surely could not have averted the revolution that happened because of someone else’s sins, but she perhaps had a chance to appear less self-indulgent to the people.
This is one more thing I could address, as well as ask how she could demonstrate that outstanding courage when she stood on the balcony of the royal palace in Versailles at the point of many guns aimed at her, and how she could have been so strong at the time of the execution. I believe that her strength demonstrates what an ordinary woman can do in the face of danger and teaches us a lot about how one should never lose a human face when challenged in any way. A talk with Marie Antoinette could give me profound insights into the nature of people and reveal many interesting points.
Explanation:
x= -2y-6 and 6x+7y=9
why do we daydream during class
Answer:
Because we wish that a dragon would just destroy school and you can ride your new dragon to starbucks, you'll be famous!!! BUT THEN REALITY SMACKS YOU IN THE FACE WITH A STUPID STACK OF HOMEWORK!!!
Explanation:
PLEASE HELP ASAP NCDLSCN-
Identify at least ten different wheels in your home and/or in your community. At least three should be wheels that are not associated with transportation. For five of them, do the following:
Measure the diameter (the distance from one edge to the opposite edge, going through the very center) of each wheel.
Describe each wheel, its size, and its use.
Explain where the force comes from that causes the torque.
Answer: answer is in explanation
Explanation:
A doorknob - about 10cm for diameter and the force that causes the torque comes from the person turning the doorknob causing friction. It’s used to open and close doors.
A screwdriver- 2m for diameter and the force that causes the torque comes from the person applying pressure and causing the screwdriver to turn with friction. It’s used to screw a screw into the wall or into an object.
Car wheels- about 12inches in diameter and the force that causes the torque comes from the engine’s chemical force and friction against the road. They’re used to make a car go and stop.
Electric fan- 14 inches in diameter and the force for torque comes from the electricity circulating from the fan making it spin to provide the air coming out of the fan. They’re used to provide people with air as a cooling system.
Pizza cutter- 10cm in diameter and the force for torque comes from the pressure being applied on the handle and the friction between the pizza and the pizza cutter. They’re used to cut pizza.
Winch
Analog clock
Windmill
Water wheel
Skateboard
The different types of wheels that we see very often is doorknob, screwdriver, cartwheels, an electric fan and pizza cutter.
What is torque?The rotatable counterpart of linear force in mechanics and engineering is torque. Depending on the context of study, it is also known as a moment, point in time of force, rotating force, or turning effect.
A doorknob with a diameter of around 10 cm creates the torque because of friction created by the person twisting the doorknob. Doors are opened and shut with it.
A screwdriver with a diameter of 2 meters produces a torque when someone applies pressure, making the screwdriver turn against resistance. It is employed to fasten a screw to a surface or an item.
Car wheels are roughly 12 inches in diameter, and the torque is produced by the chemical force of the engine and friction with the ground. They are utilized to start and stop vehicles.
Electric fan with a 14-inch diameter; the energy running through the fan causes it to spin, producing the air that flows from the fan. They serve as a conditioning system by providing air to individuals.
Pizza cutter, diameter 10 cm; torque produced by the resistance between the pizza as well as the pizza cutter, as well as pressure applied to the handle. The pizza is cut using these.
To know more about Torque:
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how fast is the world's fastest train? name the train and what country is it in
Answer:
SCMaglev, Located in Japan
Explanation:
Explain how one physical property each of acid, base and sait is used by man
Answer:
Hope this helps :)
Thanxx :)
pls help im begging you
Answer:
I think it's TRUE because forces change an object's motion but dont quote me on it ok? Cause I'm not a 100 percent sure
Question 1 of 20
Larry plans to connect the opposite ends of a coiled wire to a 10 W lightbulb
to make the bulb light up. What must he also do to induce an electric current
in the wire?
A. Move the lightbulb and the coiled wire around a magnet until the
bulb lights up.
B. Move the lightbulb so that several of the coils in the wire wrap
around the bulb.
C. Move a small electromagnet around the lightbulb continuously
until the bulb lights up.
D. Move a small magnet back and forth within a section of the coiled
wire.
SUBMIT
Answer
D. move a small magnet back and forth within a section of the coiled wire.
Explanation:
i put that for the test and i got it right
Answer:
d
Explanation: got it right
The Great Salt Lake is located in __________.
A.
Mississippi
B.
Arizona
C.
Florida
D.
Utah
Answer:
D
Explanation:
Also the capitol of Utah is Salt Lake City
Hope this helps!
Answer:
Utah
Explanation:
The Great Salt Lake, located in the northern part of the U.S. state of Utah, is the largest salt water lake in the Western Hemisphere, and the eighth-largest terminal lake in the world.
The primary __________ cortex specializes in receiving signals from different parts of the body.
A.
visual
B.
motor
C.
somatosensory
D.
auditory
Answer:
C. somatosensory
Explanation:
The somatosensory cortex is located in the front area of the parietal lobe. It receives signals for various areas of the body registering sensory input.
The primary somatosensory cortex specializes in receiving signals from different parts of the body.
What is somatosensory?The somatosensory is subsystem of nervous system that represents visual stimulus.
The somatosensory system is the network of neural structures in the brain and body that helps us to detect touch, temperature, and pain.
Thus, the primary somatosensory cortex specializes in receiving signals from different parts of the body.
Learn more about somatosensory here: https://brainly.com/question/7331754
The time it takes for a canon ball to reach it's peak height is 2.3 seconds. What is the total time in the air
Answer:
2.3s
Explanation:
The total time in flight is 2.3s.
Therefore, the time it takes the canon ball to reach its peak is also the total time of flight is 2.3s.
Time is the duration of travel of a body. The amount of time spent during flight of the canon ball is 2.3s.Which of the following is not apart of the Particle Theory of Matter? *
A. Atoms are always in motion
B. The motion of atoms increase with temperature
C. Atoms attract each other
D. Atoms do not have empty spaces between them
Answer:
D. Atoms do not have empty spaces between them
Explanation:
That atoms do not have empty spaces between them is not part of the particle theory of matter.
Here are some of the postulates of the theory;
A gas is composed of a large number of identical molecules moving at different speeds. The space occupied by gas molecules is negligible compared to the volume of space they occupy. The temperature of a gas is a function of their average kinetic energy.PLEASE HELP!!
A swimmer starting from rest has a final velocity of 2.0 m/s after 20 seconds. What is her average acceleration?
O A. 18 m/s2
OB. 22 m/s2
OC. 0.10 m/s2
O D. 40 m/s2
Answer:
[tex]a=0.1\ m/s^2[/tex]
Explanation:
Given that,
Initial velocity, u = 0
Final velocity, v = 2 m/s
Time, t = 20 s
We need to find the acceleration of the swimmer. The acceleration of an object is equal to the change in velocity per unit time. It can be given by :
[tex]a=\dfrac{v-u}{t}\\\\a=\dfrac{2\ m/s}{20\ s}\\\\a=0.1\ m/s^2[/tex]
So, her average acceleration of the swimmer is [tex]0.1\ m/s^2[/tex].
Which statement best describes the importance of joints in the roadways of Bridges ?
a. Joints strengthen the roadway to support cars and trucks
b. Joints allow the roadway to expand and
contract with varying outside temperatures
c. Joints allow the roadway to expand and contract as cars put force on the bridge
d. Joints allow the bridge to be built in smaller, easier to assemble pieces.
Answer:
c. Joints allow the roadway to expand and contract as cars put force on the bridge
Explanation:
The reasons why joints are allowed on roadway is to accommodate the contraction and expansion of the road as cars put force on them.
Most materials used in making roadways are susceptible to expansion and contraction. When a measure of force is applied their length either increases or decreases depending on the type of force. To accommodate these changes, joints are placed in roadwaysPLZ HELP DUE IN 30 min
An owl has a mass of 5 kg.It dives to catch a mouse losing 750 J of
GPE.How high was the bird to begin with? (Don't forget your units)
Answer:
height =15m
Explanation:
gpe=mgh
750=5×10×x
50x=750
x=15
hope it helps
What are 2 phenomenon that are caused by gravity
HELP ASAP PLEASEEE
Question 3 of 10
Which action must you take before starting to make an electromagnet out of
connecting wires, a battery, an ammeter, and a magnetic core wrapped in
wire?
A. Cover the ammeter with the same insulation that is on the wires.
B. Remove the wire that is wrapped around the magnetic core
material.
C. Wrap the battery with insulated wire.
D. Remove the insulation from the ends of the connecting wires.
SUBMIT
Answer:
The answer should be
D. Remove the insulation from the ends of the connecting wires.
Explanation:
The exact letter may not be D for everyone but the answer is
Remove the insulation from the ends of the connecting wires.
The action that you must take before starting to make an electromagnet out of connecting wires, a battery, an ammeter, and a magnetic core wrapped in wire is to "remove the insulation from the ends of the connecting wires". Hence, Option D is the correct answer.
What is an electromagnet?Electromagnet, can be described as the device which consists of a core of magnetic material surrounded by a coil through and it allows the electric current to pass so as to magnetize the core.
It should be noted that the electromagnet can be made to function in a case where there is controllable magnets are required, which can be contrivances in which the magnetic flux is to be varied, hence in the case above Removal of the insulation from the ends of the connecting wires will be the best action since the you are making an electromagnet out of connecting wires, as well as battery, an ammeter.
Therefore, option D is the correct answer.
Learn more about insulator at,
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Cross-training employees is only necessary in the genetic science industry.
O True
O False
Answer: False
Explanation:
Answer:
False
Explanation:
What is the force of a box with a mass of 50 Kg being accelerated with a force of 9.8 m/s27
Answer:
490 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 50 × 9.8
490 NHope this helps you
Match these items.
1. Ca
electron
2. H 2O
fission
3. nuclear decay
atomic number
4. nuclear synthesis
neutron
5. η
proton
6. positive charge
fusion
7. e
element
8. number of protons in nucleus
compound
Answer:
ca is carbon dioxide h20 is water
Explanation:
