A magnetic material, such as iron are two possible materials that could be in the door. So, the correct option is (A).
What is Magnet?
A magnet is defined as a material or object that produces a magnetic field where the magnetic field is invisible but is responsible for the most notable property of a magnet: a force that attracts metals such as iron, steel, nickel, cobalt, among others. attracts or repels ferromagnetic materials, etc. and other magnets.
Magnet is describe as the object which is capable of producing magnetic field and attracting unlike poles and repelling like poles. When the magnet is dipped in iron filings, we see that the iron filings stick to the ends of the magnet due to magnet attraction being maximum at the ends of the magnet, hence the ends are known as the poles of the magnet .
Thus, a magnetic material, such as iron are two possible materials that could be in the door. So, the correct option is (A).
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Why are many adults and youth in the United states overweight?
Answer:
I'd imagine fast food is a lot more popular than most countries over there and easier to get hold of.
Explanation:
america
Answer:
There are different answers to that, like if you read a passage or something.
Explanation:
These days many people do not get exercise. A lot of jobs are now done indoors and do not require any physical activities. Technology is becoming more advanced and many people prefer using machines to do the heaving lifting.
There are a lot of fast-food restaurants and this is where a lot of people in the US choose to eat. The food is cheap and easy to pick up. This food is convenient for people on the go. The food is not healthy and it causes weight gain.
In the US, many young children find it cool to smoke. Smoking decreases the body's strength and it causes a decrease in physical health, causing people to gain weight.
Everyone has a phone these days, if not some kind of electronic device to chat with people or play games. Over time, playing on electronic devices replaces doing physical activities.
If a car with an initial velocity of 10 m/s accelerates at a rate of 50 m/s^2
for 3 s. What will be the final velocity? *
Given:
Initial velocity (u) = 10 m/s
Acceleration (a) = 50 m/s²
Time taken (t) = 3 s
To Find:
Final velocity (v)
Answer:
By using equation of motion, we get:
[tex] \bf \longrightarrow v = u + at \\ \\ \rm \longrightarrow v = 10 + 50 \times 3 \\ \\ \rm \longrightarrow v = 10 + 150 \\ \\ \rm \longrightarrow v = 160 \: m {s}^{ - 1} [/tex]
[tex] \therefore [/tex] Final velocity (v) = 160 m/s
A tablecloth can be pulled out from underneath a fully set table without breaking plates or glassware. The reason is that the objects follow Newton's:
Answer:
newtons law of force
newtons law of force explains that something may or can or canot move depending on the objexts mass.
tell me something stupidbthe stupidest one gets brainliest
GIVING BRAINLY, FOLLOW AND STARS, HELP!
When a solid object absorbs infrared rays, what happens to the particles
in that object?
Answer:
All objects emit and absorb infrared radiation. The hotter an object is the more energy it radiates per second. Infrared radiation can travel through a vacuum. When infrared radiation hits an object some of the energy is absorbed, making the objects temperature increase, and some is reflected.
Explanation:
You leave Chicago, Illinois at 8am and fly to Portland, Oregon. Your flight takes 2.5 hours. What time do you arrive in Portland?
Answer:
10:30am ........................
Answer:
maybe around 10:30 I would say
30 POINTS!
A coconut falls 18 m from the top of a palm tree. How fast will the coconut be traveling when it reaches the ground? (Hint: KEinitial = 0, PEfinal = 0.)
A. 19 m/s
B. 13 m/s
C. 9.4 m/s
D. 27 m/s
Answer:
d
Explanation:
A football punter wants to kick the ball so that it is in the air for 4.2 s and lands 55 m from where it was kicked. Assume that the ball leaves 1.0 m above the ground.
Part A: At what angle should the ball be kicked?
Part B: With what initial speed should the ball be kicked?
Answer:
[tex]57.24^{\circ}[/tex]
24.21 m/s
Explanation:
x = Displacement in x direction = 55 m
y = Displacement in x direction = 0
[tex]y_0[/tex] = Height of the ball when the ball is kicked = 1 m
t = Time taken = 4.2 s
[tex]a_y=g[/tex] = Acceleration due to gravity = [tex]-9.81\ \text{m/s}^2[/tex]
u = Initial velocity of ball
Displacement in x direction is given by
[tex]x=u_xt+\dfrac{1}{2}a_xt^2\\\Rightarrow 55=4.2u_x+0\\\Rightarrow u_x=\dfrac{55}{4.2}\\\Rightarrow u\cos\theta=13.1\ \text{m/s}\\\Rightarrow u=\dfrac{13.1}{\cos\theta}[/tex]
Displacement in y direction is given by
[tex]y=y_0+u_yt+\dfrac{1}{2}a_yt^2\\\Rightarrow 0=1+4.2u\sin\theta+\dfrac{1}{2}\times (-9.81)\times 4.2^2\\\Rightarrow 0=4.2u\sin\theta-85.5242\\\Rightarrow u\sin\theta=20.36\ \text{m/s}\\\Rightarrow u=\dfrac{20.36}{\sin\theta}[/tex]
[tex]\dfrac{13.1}{\cos\theta}=\dfrac{20.36}{\sin\theta}\\\Rightarrow \dfrac{20.36}{13.1}=\dfrac{\sin\theta}{\cos\theta}\\\Rightarrow \theta=\tan^{-1}\dfrac{20.36}{13.1}\\\Rightarrow \theta=57.24^{\circ}[/tex]
The ball should be kicked at an angle of [tex]57.24^{\circ}[/tex]
[tex]u=\dfrac{13.1}{\cos\theta}=\dfrac{13.1}{\cos57.24^{\circ}}\\\Rightarrow u=24.21\ \text{m/s}[/tex]
The initial speed of the ball is 24.21 m/s.
The number of unknowns in the question are two therefore two equations
are required to find a solution.
Part A: The angle at which the ball should be kicked is approximately 57.56°
Part B: The initial speed with which the ball should be kicked is approximately 24.41 m/s.
Reasons:
The given parameters are;
Time the ball should be in the air = 4.2 s
Point the ball should land, d = 5.5 m from where it was kicked
Height at which the ball leaves the ground = 1.0 m
Part A;
The angle at which the ball should be kicked.
Solution;
The horizontal distance, d = uₓ·t
Therefore;
[tex]u_x = \dfrac{d}{t} = \dfrac{5.5}{4.2} = \dfrac{55}{42}[/tex]
[tex]u_x = u \cdot cos(\theta)= \dfrac{55}{4.2}[/tex]
Where;
u = The initial velocity
[tex]Vertical \ motion , \ h =\mathbf{h_0 + u_y\cdot t - \dfrac{1}{2} \cdot g \cdot t^2}[/tex]
Which gives;
[tex]0 =1 + u_y\times 4.2 - \dfrac{1}{2} \times 9.81 \times 4.2^2 = 4.2\cdot u_y - 86.5242[/tex]
[tex]u_y =u \cdot sin(\theta) = \dfrac{86.5242}{4.2} = 20.601[/tex]
[tex]\dfrac{u_y}{u_x} =\dfrac{20.601}{\left(\dfrac{55}{4.2} \right)} = \mathbf{ \dfrac{u \cdot sin(\theta)}{u \cdot cos(\theta)}} = tan\left( \theta)[/tex]
[tex]\mathrm{The \ angle \ at \ which \ the \ ball \ should \ kicked } \ \theta = arctan \left(\dfrac{20.601}{\left(\dfrac{55}{4.2} \right)} \right) \approx \underline {57.56 ^{\circ}}[/tex]
Part B
[tex]u \cdot cos(\theta)= \dfrac{55}{4.2}[/tex]
[tex]The \ initial \ speed, \ u= \dfrac{55}{4.2 \times cos(57.56^{\circ })} \approx 24.41[/tex]
The initial speed of the ball, u ≈ 24.41 m/s
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While a dog runs forward, its
owner pulls back with a 22.4 N
force at a 115º direction, doing
-42.3 J of work. How far did the
dog move?
(Unit = m)
HELP ME
Answer:
d = 4.47 [m]
Explanation:
To solve this problem we must make a free body diagram, where we can see the direction of the force acting with the appropriate angles. In the attached image we can see the free body diagram mentioned.
So in the image, we can see an angle of 65° with respect to the horizontal, therefore we can calculate the horizontal component of the force.
Fx = 22.4*cos (65)
Fx = - 9.46 [N] (it's negative because the force is pointing in the negative direction).
We can obtain the same result using 115° as the angle.
Fx = 22.4*cos (115)
Fx = 9.46 [N]
Now we know that work is defined as the product of the force by the distance, therefore we have.
Note: Always the work must be calculated with the force parallel
to the movement
W = F*d
Where:
W = work = 42.3 [J] (units of joules)
F = force parallel to the movement = 9.46 [N]
d = distance [m]
d = W/F
d = 42.3/9.46
d = 4.47 [m]
Answer:
Explanation:
the person on top of me is right it’s 4.47
What is the importance of measurement
Answer:
Scientists use many skills as they investigate the world around them. They make observations by gathering information with
their senses. Some observations are simple. For example, a simple observation would be figuring out the color or texture of
an object. However, if scientists want to know more about a substance, they may need to take measurements.
Measurement is perhaps one of the most fundamental concepts in science. Without the ability to measure, it would be
difficult for scientists to conduct experiments or form theories. Not only is measurement important in science and the
chemical industry, it is also essential in farming, engineering, construction, manufacturing, commerce, and numerous
other occupations and activities.
The word “measurement” comes from the Greek word “metron,” which means “limited proportion.” Measurement is a
technique in which properties of an object are determined by comparing them to a standard.
Measurements require tools and provide scientists with a quantity. A quantity describes how much of something there is or
how many there are. A good example of measurement is using a ruler to find the length of an object. The object is
whatever you are measuring, the property you are trying to determine is the object’s length, and the standard you are
comparing the object’s length to is the ruler.
In general, scientists use a system of measurement still commonly referred to as the “metric system.” The metric system
was developed in France in the 1790s and was the first standardized system of measurement. Before that time, people
used a variety of measurement systems.
In 1960, the metric system was revised, simplified, and renamed the Système International d’Unites (International
System of Units) or SI system (meters, kilograms, etc.). This system is the standard form of measurement in almost
every country around the world, except for the United States, which uses the U.S. customary units system (inches,
quarts, etc.). The SI system is, however, the standard system used by scientists worldwide, including those in the
United States.
There are several properties of matter that scientists need to measure, but the most common properties are length and mass.
Length is a measure of how long an object is, and mass is a measure of how much matter is in an object. Mass and length
are classified as base units, meaning that they are independent of all other units. In the SI system, each unit of measure has
a base unit.
Explanation:
Some things scientists want to measure may be very large or very small. The SI, or metric, system is based on the
principle that all quantities of a measured property have the same units, allowing scientists to easily convert large and
small numbers. To work with such large or small numbers, scientists use metric prefixes. Prefixes can be added to base
units and make the value of the unit larger or smaller. For example, all masses are measured in grams, but adding
prefixes, such as milli- or kilo-, alters the amount. Measuring a human’s mass in grams would not make much sense
because the measurement would be such a large number. Instead, scientists use kilograms because it is easier to write
and say that a human has a mass of 90 kilograms than a mass of 90,000 grams. Likewise, one kilometer is 1,000 meters,
while one millimeter is 0.001 meters. The table below lists some common prefixes and the quantities they represent.
what allows for movement
Choose the correct answer:
-excretory
-immune/hymophatic
-integumentary
-muscular
Click to review the online content. Then answer the question(s) below, using complete sentences. Scroll down to view additional questions. Free Weights and Machines What are some things to consider when deciding to use free weights or machine weights?
Machine weights are safer when used correctly, but free weights can be dropped and cause injury. These are safety considerations to keep in mind whether using free weights or machine weights. But because they aren't big, complicated machinery, free weights are less expensive.
What are free weights or machine weights?Resistance machines and free weights are very different from one another in terms of how they work and the results they can create.
Machines are set in place and can only move in a few directions, whereas free weights can be moved in whatever direction the user selects. This is the main distinction between machines and free weights. Free weights require you to utilize more stabilizing muscles to control them, whereas resistance machines help you by stabilizing you while you move.
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Caregivers should begin reading to children:
When they are babies.
When they can talk.
When they show an interest.
When they are two.
When they are preschoolers.
Answer:
When they are babies. to get them familar with it
Explanation:
Pls choose brainliest.
Answer:
When they are babies
Explanation:
Because they could hear the words and laern them.
Can anyone please help me put
Answer:
Bulb a
Explanation:
the value of the normal force exerted on a 2,000 gram block on a table
Answer:
N = 19.6 N
Explanation:
Given that,
Mass of a block, m = 2000 g
1 kg = 1000 g
It means, 2000 g = 2kg
We need to find the value of normal force on the block on a table. Normal force is balanced by the weight of the block as follows :
N = mg, g is acceleration due to gravity
N = 2 kg × 9.8 m/s²
N = 19.6 N
So, the normal force acting on the block is 19.6 N.
Car 1 of mass m1 is waiting at a traffic light.
Car 1 is struck from behind by Car 2 of mass m2.
The two cars stick together after the collision.
Car 2 was traveling at v2i = 30.0 m/s before the collision.
What is the initial kinetic energy, in [J], of car 1, if m1= 2500kg?
Answer: KE= 1/2 m v^2
KE= 1/2 2500 (0)^2
KE= 0
Explanation: since initial velocity is 0, the KE is 0.
The initial kinetic energy, in [J], of car 1 is 0.
KE= 1/2 m v^2
KE= 1/2 2500 (0)^2
KE= 0
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by means of reason of its movement. If paintings, which transfer strength, are carried out on an object via making use of an internet pressure, the object hastens and thereby gains kinetic energy.
What's the initial and very last kinetic strength?The kinetic strength of an object depends on its velocity. To trade its pace, one must exert pressure on it. It turns out there's a connection between the pressure one applies to an object and the resulting change in its kinetic electricity: KE(very last) - KE(initial) = (force) (distance)
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GIVING BRAINLIEST TO THE RIGHT ANSWER examine the information for the two samples described in the chart. How are zinc and sodium alike?
A. They have the same hardness at room temperature.
B. They are both dolids at room temperature.
C. They have the same color.
D. They have the same boiling point.
15 points :) plz hurry tho
Answer:
The rock in Diagram A seems to not have that much stress on it, the one in B seems to be pushing itself together, the one in C seems to be pulling itself apart and the one in D seems to be sliding past each other. A has not had any stress as its staying still while B seems to be a tectonic plate where subduction is occurring, in rock C it also seems to be a tectonic plate where it is a Convergent Boundary, rock C seems to be a Divergent Boundary and D seems to be a Transform Boundary.
Explanation:
FLVS Science 7
Can you give be brainliest please? It took me a while to think of this answer.
compound name: for C3N6
Answer:
C3N6 is also known as propene(Meythlethylene)
Explanation:
Propene has 3 Carbon molecules and 6 nitrogen molecules. This makes the new substance a non-metal.
A haiku about motion.....I need a haiku about motion...if someone like writing pls help, write a haiku about MOTION
Answer:
Motion is a powerful experience
Motion brings out the best in people
Motion can flow like oceans
Explanation:
Which would take a longer time to warm up, a piece of brass or a piece of marble, given that both
have the same mass? Explain your answer.
Answer:
Explanation:
specific heat of marble is 880 J/kg °C
specific heat of brass is 920 J/kg °C
If Q heat is given to a body of mass m and specific heat s , and there is a rise of temperature t
Q = m s t
t = Q / m s
if Q and m is constant
t is inversely proportional to specific heat .
so rise in temperature will be inversely proportional to specific heat .
lower the specific heat , higher will be the rise in temperature . Since marble has lower specific heat , rise in temperature in marble will be higher and quicker .
So brass will take longer time to warm up.
Which refers to the rate of change in velocity?
speed
O acceleration
O direction
O magnitude
simplify log√8÷log√8
Answer:
The answer is 1.
Explanation:
PLEAASSEEEE HELLLPPP !
Answer: It moves in the direction of Fb at a constant rate of speed, because the same amount of force is being added the whole time.
Explanation:
How is power calculates
Answer:
Explanation:
Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.
Determine the acceleration of a boat with a final speed of 120 m/s after 30 seconds.
Answer:
ehehehshehehehhehesh
Explanation:
ehehehehheheheeheh
Explain how to identify a starting position on a line.
Answer: You can easily find out the beginning point of the line by using dot representation. When it comes to position vector, it expresses the exact position of certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end which is fixed to its body.
brainliest please :)
Answer:
We can easily find out the beginning point of the line by using dot representation. When it comes to the position vector, it expresses the exact position of a certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end that is fixed to its body.
What is the velocity of a 0.06
kg ball moving with 75 J of energy?
Answer:
The ball moves at 50 m/s
Explanation:
Kinetic Energy
Is the energy that it possesses an object of mass m due to its motion at speed v. The kinetic energy is calculated as follows:
[tex]\displaystyle K=\frac{1}{2}m\cdot v^2[/tex]
If we know the value of the kinetic energy and need to calculate the speed, we can solve it for v:
[tex]\displaystyle v=\sqrt{\frac{2K}{m}}[/tex]
Since the ball has a mass of m=0.06 kg and moves with a kinetic energy of K=75 Joule:
[tex]\displaystyle v=\sqrt{\frac{2\cdot 75}{0.06}}[/tex]
[tex]\displaystyle v=\sqrt{\frac{150}{0.06}}[/tex]
[tex]\displaystyle v=\sqrt{2500}[/tex]
v=50 m/s
The ball moves at 50 m/s
Answer:50m/s
Explanation:divide
Npk fertilizer is called a complete fertilizer,why?
Answer:
Complete fertilizers or balanced fertilizers are so-called because of their amounts of nitrogen, phosphorus, and potassium. ... If your soil already had an excess of one of the three nutrients in NPK, you could actually be harming some of your plants by adding more of it to the soil
Explanation:
What sport was inspired by basketball adapted for older adults who were still interested in being physically active
Answer:
shes right, I just took the test