An interaction between electricity and magnetism produces an
electromagnet, while a permanent magnet induces the paper clip's
magnetic field. Hence, option (C) is correct.
What re permanent magnet and electromagnet?An object that can generate a magnetic field, attract unlike poles, and repel like poles is referred to as a magnet.
Magnets that are frequently utilised are permanent magnets. Because they maintain their magnetic quality after being magnetised, they are referred to as permanent magnets.
A coil of wire is used to create electromagnets (wire curled in series). This generates a magnetic field more effectively than a wire running straight. By tightly winding a wire around a strong magnetic core formed of an iron-based substance, this effect can be amplified. In the image above, a coil is seen wrapped around an iron nail. The iron nail is not magnetic on its own.
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A 10 kg box is 1.3 m above the ground. How much potential energy does it have? (g on Earth of 9.8 m/s?
answer =
GPE = mgh
KE = .5mv2
I really need help
Ted William drops a ball from 14.5 meter to a desk that is 1.9 meters tall. What is the final speed of the ball right before it hits the desk.
Answer:
15.7m/s
Explanation:
To solve this problem, we use the right motion equation.
Here, we have been given the height through which the ball drops;
Height of drop = 14.5m - 1.9m = 12.6m
The right motion equation is;
V² = U² + 2gh
V is the final velocity
U is the initial velocity = 0
g is the acceleration due to gravity = 9.8m/s²
h is the height
Now insert the parameters and solve;
V² = 0² + 2 x 9.8 x 12.6
V² = 246.96
V = √246.96 = 15.7m/s
3) A 15.0kg cannonball is ascending after being launched. Neglect drag.
a)How many forces are acting on the cannonball?
b)What is the magnitude of the net force on the cannonball?
c)What is the magnitude of the cannonball's acceleration
dDescribe the cannonball's speed at this time:
Answer:
c
Explanation:
Water is used for all of the following in an organism except what?
transporting materials, carrying nutrients to and within cells, carrying waste away from cells, or building bone mass?
Hello there,
Answer: The answer to you're question is B.) carrying nutrients to and within cells.
Explanation: Water's extensive capability to dissolve a variety of molecules has earned it the designation of “universal solvent,” and it is this ability that makes water such an invaluable of life sustaining force. On a biological level, water's role as a solvent helps cells transport and use substances like oxygen or nutrients. Catch this, water helps take the toxins out of your body. Water also helps you from getting sick. Plus, the brain is 90% water. So, drink that water..... :3
20 POINTS
PLEASE HELP THIS IS DUE IN 5 MINUTES
please do not troll or put the wrong answer
Answer:
I believe the answer is B.
Explanation:
Newton's First Law of Gravity states, "The greater the weight (or mass) of an object, the more inertia it has. Heavy objects are harder to move than light ones because they have more inertia. "
The answer is D.
All objects travel at the same speed due to gravity.
I hope I helped! Sorry if my inference was incorrect.
Mary Jo went on riding her horse through the trails. Her pace was 8 km/hr. She left at 8:30 am and got back to the barn at 9:00 am. How far did she go?
Question 4 options:
16 m/s
4 m/s
4 km
16 km
Answer:
4km
Explanation:
Distance=speed x time
Knowing this we know the time and speed
so it is 8 x .5= D
And 8 x .5 =4
If you have any questions let me know
You lift a 2.0 kg book from a shelf that is 1 m from the floor. What is the potential energy with respect to floor?
Compounds are made of more than one type of element bound together in fixed ratios.
True or false?
Answer:
True
Explanation:
There are two major pure substances in Chemistry namely: elements and compounds. Elements are substances made up of only one type of atom which cannot be broken down. For example, H2 symbolizing hydrogen gas is an element.
On the other hand, atoms of different elements can combine together and be held by chemical bonds to form substances called COMPOUNDS. Hence, a compound is pure substance made of more than one type of element bound together in fixed ratios. For example, Al2O3 is a compound comprising of elements Al (aluminum) and O (oxygen) in a fixed ratio of 2:3.
Gizmo do you know how to do it
Answer:
?? what
Explanation:
a physics instructor conducts a projectile motion demonstration. The device used will drop one steel ball and horizontally launch another. If no air resistance is presented which steel ball, the one launced or the one dropped, striked the ground first?
(a) The launched ball
(b) The dropped ball
(c) both hit a the same time
(d) neither hit the ground
Answer:
Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The object is called a projectile, and its path is called its trajectory. The motion of falling objects, as covered in Problem-Solving Basics for One-Dimensional Kinematics, is a simple one-dimensional type of projectile motion in which there is no horizontal movement. In this section, we consider two-dimensional projectile motion, such as that of a football or other object for which air resistance is negligible.
Explanation:
B the dropped ball
According to Newton’s 2nd law of motion: objects at a rest will remain in rest unless acted upon
Answer:
True
Explanation:
It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion. Any change in motion involves an acceleration, and then Newton's Second Law applies.
- Hyperphysics
Answer:
true
Explanation:
because that's the answer
can anyone plz give me a right answer now?
Answer:
Dy = - 0.0789 [m]
Explanation:
The vertical component of the vector can be determined with the sine of the angle.
Dy = 0.250*sin(18.4)
Dy = 0.0789 [m]
As the y-component is pointing downwards the component is negative.
Dy = - 0.0789 [m]
One possible unit of speed is
Answer:
m per second is the answaegnzxn
People on here are soooo smart I wish I could be like that
Answer:
3600J
Explanation:
The amount of energy transferred in two minutes by the given heater is 3600J of energy.
This energy causes a transfer of kinetic energy to the copper. To solve this problem;60 seconds = 1 minutes
In two minutes, the number of seconds = 2 x 60 = 120seconds
So, on the table, at 120 seconds, 3600J of energy would have been transferred.
Two drops of dilute sulphuric acid were added to 1 gm of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured solution got separated (step II). Step I and step II are:
Answer:
Both are physical changes
Explanation:
The dissolution of 1 gram of copper sulphate powder in a small amount of hot water in the presence of dilute H2SO4 is a physical change because no new substance was really formed in the process. This implies that step 1 is a physical change.
In step II, the hot liquid is allowed to cool leaving behind a beautiful blue coloured solution. This also is a physical change.
Hence both step I and step II are physical changes.
What is one way skin, muscle, and nerve cells similar?
Answer:
For starters the membrane voltage is the same in nerve cells as in muscle cells.
As for skin and muscle cells, both cells arise from the same type of embryonic layer, the ectoderm and both which produces energy, though skin cells eventually lose their organelles.
A man drives his car 5 km east of his starting point then he travels 10 km south and reaches a point. From here he travels 15 km towards west and reaches another point .Finally he travels 20 km towards north. Find the net displacement of the man from where he started
Answer:
hjkjjjrjebdbnnd heudhdb
jupiter has a mass of 1,898,000,000,000,000,000,000,000,000 kg. How would this number be expressed in scientific notation?
Answer:
Explanation:
How would this number be expressed in scientific notation? 1.898^27 kg. ...
A 6.2 kg bowling ball that weighs 60.76 N is accelerating at 1.8 m/s2. After 2
seconds, it reaches a speed of 3.6 m/s. What is its momentum at this point?
A. 11.2 kg-m/s
B. 1.7 kg.m/s
C. 22.3 kg-m/s
D. 16.9 kg.m/s
The momentum of the bowling ball at the point where it reaches a speed of 3.6 m/s is 22.3 Kg.m/s (Option C)
How do i determine the momentum?Momentum is defined as the product of mass and velocity. It is represented mathematically as:
Momentum = mass × velocity
Now, we can obtain the momentum of the bowling ball at the point where it reaches a speed of 3.6 m/s. Details below:
Mass of bowling ball = 6.2 KgVelocity of bowling ball = 3.6 m/sMomentum =?Momentum = mass × velocity
Momentum = 6.2 × 3.6
Momentum = 22.3 Kg.m/s
Thus, the momentum at the point is 22.3 Kg.m/s (Option C)
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A soccer ball is rolling across a soccer field. The system consists of the
ball. The force of gravity pulls down on the ball as it rolls. Is the work positive or negative?
Answer:
NEGATIVE
Explanation:
friction always opposes ___________ motion
If the air has a thermal energy of 4.5 x 10 J , what is the air temperature ?
Answer:
This is easy. You subtract the final temperature from the starting temperature to find the difference. So if something starts at 50 degrees Celsius and finishes at 75 degrees C, then the change in temperature is 75 degrees C – 50 degrees C = 25 degrees C. For decreases in temperature, the result is negative.
The heaviest loads ever raised were part of the offshore Ekofisk complex in the North Sea. The 4.0x 10 kg complex was raised 6.5 m by over a hundred hydraulic jacks. The work done on the complex during the raising was approximately 2.6x 101 J. Suppose the power output of all the jacks was 5.7x 10 W. How long did it take the jacks to raise the complex?
Answer:
0.5s
Explanation:
Given parameters:
Mass of the complex = 4 x 10kg
Distance moved = 6.5m
Work done = 2.6 x 10¹J
Power = 5.7 x 10W
Unknown:
Time taken = ?
Solution:
Power is the rate at which work is done.
Power = [tex]\frac{work done}{time}[/tex]
work done = power x time
time = [tex]\frac{work done }{power}[/tex]
Insert the parameters;
time = [tex]\frac{260}{570}[/tex] = 0.5s
Why does a heat pump need an external source
of energy (such as electrical energy) ?
Answer:
The reason is because a heat pump uses external power to accomplish the work of transferring energy from the heat source to the heat sink. Heat pumps are significantly more energy efficient than simple electrical resistance heaters. The efficiency begins to decrease as the temperature difference between the heat source and sink increases.
A runner is training and runs past meter mark 65 and starts a stopwatch. After the runner passes meter mark 15 the stopwatch stops at 8 seconds.
What was the runners velocity?
Question options:
-6.25 m/s
6.25 m/s
8.13 m/s
-1.88 m/s
Answer:
6.25 m/s
Explanation:
Given parameters
Initial mark = 65
Final mark = 15
time taken = 8s
Unknown:
Velocity of the runner = ?
Solution:
Velocity is the displacement divided by time;
Velocity = [tex]\frac{displacement}{time}[/tex]
Displacement = Initial mark - final mark = 65 - 15 = 50m
Now, insert the parameters and solve;
Velocity = [tex]\frac{50}{8}[/tex] = 6.25m/s
need help asap; put you as brainliest
Answer:
unmmmmmmmm I think the answerA
What is the relationship between PE and KE in a system?
Answer: The connection between the two is that potential energy transforms into kinetic energy.
Explanation:
A car drove 10m east and then turned around and drove back 5m west. What is the total distance traveled and the displacement
Answer:
15m
Explanation:
It takes some work for you to lift an object 20cm. How much work must you do to lift the same object 40cm?
Answer:
Twice the work needed to lift the 20cm object
Explanation:
Work done is derived using the expression below;
Work done = Force x distance
For this problem, we are lifting through a vertical height;
Work done = mg x h
mg is the weight of the body;
Since both bodies have the same weigh;
W1 is the workdone to lift 20cm
W2 is the workdone to lift 40cm
For the first lift;
W1 = (mg) x 20cm
(mg) = [tex]\frac{W1}{20}[/tex]
For the second lift;
W2 = (mg) x 40cm
Since they both have the same weight
(mg) = [tex]\frac{W2}{40}[/tex]
Equating the two weights;
[tex]\frac{W1}{20}[/tex] = [tex]\frac{W2}{40}[/tex]
20W2 = 40W1
W2 = [tex]\frac{40W1}{20}[/tex] = 2W1
Which is occurring when work is being done?
Answer:
When work is being done, the practie of labor is being performed. When work isn't being completed, this is a sign of procrastination.
Explanation:
In the answer.
Answer:
D- energy is being transferred
Explanation:
