Answer:
B - magnet pulls an item toward it.
Explanation:
It's the answer trust bro
Answer:
B.
Explanation:
Because your not physically touching the item getting pulled towards the magnet. hope this helps
Can you make predictions about the Moon's appearance?
Answer:
answer: no
Explanation:
A ball has a mass of 140 g what is the force needed to accelerate the mall at 25 m/s squared
Answer:
[tex]\boxed {\boxed {\sf 3.5 \ Newtons}}[/tex]
Explanation:
Force is the product of mass (in kilograms) and acceleration (in meters per square second).
[tex]F=ma[/tex]
The mass of the ball is 140 grams and the acceleration is 25 m/s². Convert grams to kilograms.
1 kg=1000 g[tex]140 \ g *\frac{1 \ kg}{1000 \ g}=\frac{140}{1000} \ kg =0.14 \ kg[/tex]Substitute the values into the formula.
[tex]F= 0.14 \ kg * 25 \ m/s^2[/tex]
Multiply.
[tex]F= 3.5 \ kg*m/s^2[/tex]
1 kilogram meter per square second is equal to 1 NewtonOur answer equals 3.5 Newtons[tex]F= 3.5 \ N[/tex]
3.5 Newtons of force are required.
What are 4 ways individuals can influence the government?
You are working as an electrical technician. One day, out in CR the field, you need an inductor but cannot find one. Look- ing in your wire supply cabinet, you find a cardboard tube with single-conductor wire wrapped uniformly around it to form a solenoid. You carefully count the turns of wire and find that there are 580 turns. The diameter of the tube is 8.00 cm, and the length of the wire-wrapped portion is 36.0 cm. You pull out your calculator to determine:
a. the inductance of the coil
b. the emf generated in it if the current in the wire increases at the rate of 4.00 A/s.
Explanation:
Given info: The Number of turns in the wire is 580 the diameter of
tube is [tex]8.00 \mathrm{~cm}[/tex] and the length of the tube up to which wire is wrapped is [tex]36.0 \mathrm{~cm}[/tex].
Formula to calculate the inductance of the coil is,
[tex]L=\frac{\mu_{0} N^{2} A}{l}[/tex]
Here,
[tex]L[/tex] is inductance of the coil.
[tex]\mu_{0}[/tex] is the permittivity.
[tex]N[/tex] is the number of turns.
[tex]l[/tex] is the length up to which wire is wrapped.
[tex]A[/tex] is the cross sectional area of the coil.
The expression for the area is,
[tex]A=\frac{\pi d^{2}}{4}[/tex]
Substitute [tex]\frac{\pi d^{2}}{4}[tex] for [tex]A[/tex] in equation (1).
[tex]L=\frac{\left(\mu_{0} N^{2}\right) \frac{d d^{2}}{4}}{l}[/tex]
Substitute 580 for [tex]N, 4 \pi \times 10^{-7}[tex] for [tex]\mu_{0}, 8.00 \mathrm{~cm}[tex] for [tex]d[tex] and [tex]36.0 \mathrm{~cm}[tex] for [tex]l .[/tex]
[tex]\begin{array}{c}
=\frac{4 \pi \times 10^{-7} \times 580 \times 580 \times \frac{x(8.00 \mathrm{~cm} \times 8.00 \mathrm{~cm})}{4}}{36 \mathrm{~cm}} \\
=5.90 \mathrm{mH}
\end{array} [/tex]
Conclusion:
Therefore, the inductance of the given single conductor wire is
[tex]5.90 \mathrm{mH} .[/tex]
Given info: The rate of increasing current [tex]4.00 \mathrm{~A} / \mathrm{s}[/tex] and the inductance of the coil [tex]5.90 \mathrm{mH}[/tex].
The generated emf is,
[tex]
\varepsilon=L \frac{d i}{d t}
[/tex]
Here,
[tex]\varepsilon[/tex] is the generated emf.
[tex]L[tex] is the inductance of the coil.
[tex]\frac{d i}{d t}[tex] is the rate of change of current.
Substitute [tex]5.90 \mathrm{mH}[tex] for [tex]L[tex] and [tex]4.00 \mathrm{~A} / \mathrm{s}[tex] for [tex]\frac{d i}{d t}[/tex]
[tex]\begin{array}{c}
\varepsilon=5.90 \mathrm{mH} \times 4.00 \mathrm{~A} / \mathrm{s} \\
= & 23.6 \mathrm{mV}
\end{array}[/tex]
Conclusion:
Therefore, the generated emf is [tex]23.6 \mathrm{mV}[/tex].
Objects A and B both have mass 2 kg. Object A has temperature 20°C and Object B has temperature 40°C. The specific heat of Object A is larger than that of Object B. The two objects are isolated from the environment and are brought into thermal contact with each other and allowed to come to thermal equilibrium. Is the final temperature of both objects greater than, less than or equal to 30°C? Briefly explain your reasoning.
Answer:
Equal to 30°C.
Explanation:
The final temperature of both objects are equal to 30°C because of the conduction heat from one object to another. Both objects have same mass of 2 kg and both were isolated from the external environment so conduction of heat occurs from the more hotter body to the less hotter body until the temperature of both objects are equal to each other.
The final temperature of both objects is less than 30° C
What is the specific heat of an Object?
The specific heat of an object is the minimum required quantity of heat needed to raise the temperature of 1 gram of the object(substance) by 1° C.
From the parameters given:
The mass of both Object A and B = 2kgThe temperature of Object A = 20° CThe temperature of Object B = 40° CUsing the Calorimetry principle, we need to understand that the heat lost by an object at a high temperature is proportionally equal to that heat gained by the object at a low temperature.
i.e.
[tex]\mathbf{Q_{lost}= Q_{gain}}[/tex]
[tex]\mathbf{ms_B \Big[40^0 \ C - \theta_o\Big]= ms_A \Big [ \theta_o - 20^0 \ C \Big]}[/tex]
Given that:
The specific heat of object A is larger than that of object B i.e. [tex]\mathbf{S_A> S_B}[/tex]Then, let us consider a scenario where [tex]\mathbf{S_A = 1.5S_B}[/tex]
Thus;
[tex]\mathbf{S_B \Big[40^0 \ C - \theta_o\Big]= 1.5S_B \Big [ \theta_o - 20^0 \ C \Big]}[/tex]
[tex]\mathbf{40^0 \ C - \theta_o= 1.5 \theta_o - 20^0 \ C}[/tex]
[tex]\mathbf{ 2.5\theta_o= 70^0 \ C}[/tex]
[tex]\mathbf{ \theta_o= \dfrac{70^0 \ C}{2.5}}[/tex]
[tex]\mathbf{ \theta_o=28 ^0 C}[/tex]
Therefore, we can conclude that since the specific heat of object A is larger than that of object B i.e. [tex]\mathbf{S_A> S_B}[/tex], then the final temperature [tex]\mathbf{ \theta_o<30 ^0 C}[/tex]
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PSYW - Please Show Your Work
A radiator made out of iron of specific heat capacity 450 J/kgk has a mass of 45.0 kg
and is filled with 23.0 kg of water of specific heat capacity 4200 J/kgK.
Determine the energy required to raise the temperature of the radiator-water system by
1°K
Answer:
9.66E4 J
Explanation:
We have that the energy required to raise the temperature of the radiator-water system by
1°K
E=116.85KJ
From the question we are told
A radiator made out of iron of specific heat capacity 450 J/kgk has a mass of 45.0 kg and is filled with 23.0 kg of water of specific heat capacity 4200 J/kgK.
Determine the energy required to raise the temperature of the radiator-water system by 1°K
Generally the equation for the Energy is mathematically given as
[tex]E=((mc)_i+mc_w)dt\\\\Therefore\\\\E=(45* 450 +4200*23)1\\\\E=116850J\\\\E=116.85KJ\\\\[/tex]
Therefore
the energy required to raise the temperature of the radiator-water system by
1°K
E=116.85KJ
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Find the magnitude of the sum
of these two vectors:
5.00 mA,
30.0°
B4
6.00 m
magnitude (m)
Answer:
Approximately [tex]3.01\; \rm m[/tex].
Explanation:
Decompose each vector into the sum of two vectors: a horizontal one (parallel to the arrow that points to the right) and a vertical one (parallel the arrow that points upwards.)
Vector [tex]\sf A[/tex] is horizontal and is at an angle of [tex]0^\circ[/tex] with the horizon.
Horizontal component of vector [tex]\sf A[/tex]: to the right, with a length of [tex]5.00\; \rm m \cdot \cos\left(0^\circ \right) = 5.00\; \rm m[/tex].Vertical component of vector [tex]\sf A[/tex]: [tex]5.00\; \rm m \cdot \sin\left(0^\circ \right) = 0\; \rm m[/tex].Vector [tex]\sf B[/tex] is at an angle of [tex]30^\circ[/tex] below the horizon.
Horizontal component of vector [tex]\sf B[/tex]: to the right, with a length of [tex]\displaystyle 6.00\; \rm m \cdot \cos\left(30^\circ \right) = (6.00\; \rm m) \times \frac{\sqrt{3}}{2}\approx 5.19615\; \rm m[/tex].Vertical component of vector [tex]\sf B[/tex]: downwards, with a length of[tex]\displaystyle 6.00\; \rm m \cdot \sin\left(30^\circ \right) = 6.00\; \rm m \times \frac{1}{2} = 3.00\; \rm m[/tex].Calculate the sum of vector [tex]\sf A[/tex] and vector [tex]\sf B[/tex].
The horizontal component of vector [tex]\sf A[/tex] and vector [tex]\sf B[/tex] are opposite to one another. Therefore, the length of the horizontal component of [tex]\sf (A + B)[/tex] would be the difference between the length of the horizontal components of vector [tex]\sf A\![/tex] and of vector [tex]\sf B\![/tex]:
[tex]\displaystyle (6.00\; \rm m) \times \frac{\sqrt{3}}{2} - 5.00\; \rm m \approx 0.196152\; \rm m[/tex].
The length of the vertical component of vector [tex]\sf A[/tex] is [tex]0\; \rm m[/tex]. Therefore, the length of the vertical component of [tex]\sf (A + B)[/tex] would be equal to the length of the vertical component of vector [tex]\sf B[/tex], [tex]\displaystyle 6.00\; \rm m \times \frac{1}{2} = 3.00\; \rm m[/tex].
Therefore, the length of the horizontal and vertical component of [tex]\sf (A + B)[/tex] are approximately [tex]0.196152\; \rm m[/tex] and [tex]3.00\; \rm m[/tex], respectively. The length of vector [tex]\sf (A + B)\![/tex] would be approximately:
[tex]\displaystyle \sqrt{(0.196152\; \rm m)^{2} + (3.00\; \rm m)^{2}} \approx 3.01\; \rm m[/tex].
Timed plz hurry
Enlarged brain ventricles are presumed to signify
A. an excess of dopamine activity
B. frontal lobe abnormalities
C. development of brain tissue
D. a deterioration of brain tissue
Answer:
D. a deterioration of brain tissue
A deterioration of brain tissue cause enlargement of brain ventricles
When an injury or illness alters the circulation of CSF, one or more of the ventricles becomes enlarged as CSF accumulates. In an adult, the skull is rigid and cannot expand, so the pressure in the brain may increase profoundly. Hydrocephalus is a chronic condition in which is the buildup of fluid in the cavities (ventricles) deep within the brain. It can be controlled, but usually not cured.What is CSF?Cerebrospinal fluid (CSF) is a clear, colorless liquid found in your brain and spinal cord. They combinedly form central nervous system.Central nervous system controls and coordinates everything you do including muscle movement, organ function, and even complex thinking and planningHence, D) is the correct option.
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Which pair of sentences is describing the same velocity?
Two identical balls move at the same speed what momentum do the balls possess
At highest point above h from initial position .
And then ball B come to point A with same velocity v and after that elastic collision between A and B .
B get rest and A move with velocity v by momentum conservation .
The momentum of ball 1 is mv and momentum of the ball 2 is -mv. Therefore, option (C) is correct.
What is momentum?The momentum of an object can be explained as the function of the object's mass and object's velocity. Momentum (p) can be used to determine kinetic energy and is the multiplication of velocity (v) and mass (m).
The momentum is the vector quantity because the velocity is the vector while mass is the scalar. So the product of the vector and scalar quantity is a vector.
The momentum can be determined from the mathematical formula:
p = m×v
The momentum can be described as a conserved quantity but it can be zero if the object is stationary because the velocity of an object is zero.
The mass of both balls is 'm' but they are moving in different directions, therefore, the velocity of one ball will be 'v' while the ball will be - v. Therefore the momentum of one ball is mv and the other ball is - mv.
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Speed versus Time
The graph below suggests
A. a constant speed of 3 m/s followed by speed of 1 m/s
B. a constant velocity of 2 m/s followed by speed of zero
C. a constant speed of 4 m/s followed by speed of zero
D. a constant acceleration of 2 m/s followed by speed of zero
F. a constant speed of 2 m/s followed by speed of zero
Answer:
a constant speed of 2 m/s followed by speed of zero
Explanation:
I got it right on the test.
Examine the diagram of a cell.
Which organelle is marked with an X?
cell membrane
mitochondrion
nucleus
ribosome
Answer:
It is the Nucleus
Answer:
Nuclease
Explanation:
The specific heat of water in its solid phase (ice) is 2090 J/(kg K), while in the liquid phase (water) its specific heat is 4190 J/(kg K). Water's latent heat of fusion is 333,000 J/kg. If you have a 2kg block of ice at -90°C and you add 1,000,000 J of heat, what is its new temperature?
a. 0°C
b. 14°C
c. 49°C
d. 149°C
Answer:
d. 149 ⁰C.
Explanation:
Given;
mass of the block of ice, m = 2 kg
specific heat capacity of the ice, C = 2090 J/(kgK)
initial temperature of the ice, t₁ = -90 ⁰C
heat added to the ice, H = 1,000,000 J
let the final temperature of the ice = t₂
The final temperature of the ice after adding the heat is calculated as follows;
[tex]H = mC_{ice} \Delta t\\\\H = mC_{ice} (t_2 - t_1)\\\\1,000,000 = 2 \times 2090 \times (t_2 - (-90))\\\\1,000,000 = 4,180(t_2 +90)\\\\1,000,000 = 4,180t_2 + 376,200\\\\1,000,000 - 376,200 = 4,180t_2\\\\623,800 = 4,180 t_2\\\\t_2 = \frac{623,800}{4,180} \\\\t_2 = 149 \ ^0C[/tex]
Therefore, the new temperature of the water is 149 ⁰C.
This graph shows the path length based on the number of speciation events in a evolution path.
Speciation Events vs. Path Length gradual evolution Path Length punctuational evolution Number of Speciation Events
What does the graph suggest about the evolution path length
a. The punctuational evolution path is the same as the gradual evolution path
b. The gradual evolution path is longer that the punctuational evolution path
c. Gradual evolution does not effect the evolution path length
d. Punctuational evolution does not effect the evolution path length
Answer:
Nbhb
Explanation:
A child pulls a sled by a rope across the lawn at a constant speed. Of the forces listed, identify which act upon the sled.
All of the following are possible transition points that occur during adulthood except __________.
A.
marriage
B.
rapid physical growth
C.
parenthood
D.
divorce
Answer:
B
Explanation:
.....................
Answer:
B. Rapid Physical Growths
Infer Which of the following is NOT true of gravitational force?
Answer:
I think it's a repulsive force
A lever with a mechanical advantage of .4 is more advantageous than just picking up the object with your hands and lifting it up.
True
False
Answer:
true
Explanation:
Three resistors having resistances of 1.10 .3.00
, and 5.00 are connected in series to a 26.0V battery that has negligible internal resistance.
A)
Find the equivalent resistance of the combination
Req = 9.10
B) Find the current in through 1.10 resistor
B)
Find the current in through 1.10 ?
A rain drop of radius 0.3mm has terminal velocity 1m/s in air. The viscosity of air is 18X10-5 poise, then viscous force is
Answer:
F = 1.0178 × 10^(-2) dyne
Explanation:
From stokes law, the viscous force also known as drag force on rain drop is given by the formula;
F = 6πηrv
Where;
η is viscosity
r is radius
v is velocity
We are given;
η = 18 × 10^(-5) poise
r = 0.3 mm = 0.03 cm
v = 1 m/s = 100 cm/s
Thus;
F = 6π × 18 × 10^(-5) × 0.03 × 100
F = 1.0178 × 10^(-2) dyne
Whenever a body is in motion there is always a ____ to oppose the motion
A. Friction
B. Intertia
C. Gravity
D. acceleration
Whenever a body is in motion there is always a friction to oppose the motion.
What is friction ?"Friction is a force that resists the motion of one object against another."
Friction is a force that opposes relative motion between surfaces in contact. One of the simpler characteristics of friction is that it is parallel to the contact surface between surfaces and always in a direction that opposes motion or attempted motion of the systems relative to each other.
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Can you answer these questions would mean so much grades are due next week and im just really busy will give 35 points
Answer:
C.) X-Rays
B.) Focus
A.) Laser
B.) 38 x 10^-16 Joules
A 7.0kg object rests on a horizontal frictionless surface. What is the magnitude of the horizontal
force that is required to accelerate it at the rate of 2.3m/s2
?if you can show work it would be perfect
Answer:
16.1 N
Explanation:
From the question,
F = ma.............................. Equation 1
Where F = horizontal force, m = mass of the object, a = acceleration .
Given: m = 7.0 kg, a = 2.3 m/s²
Substitute this values into equation 1
F = (7.0×2.3)
F = 16.1 N.
Hence the magnitude of the horizontal force is 16.1 N
What is the fastest bird
Answer:
Peregrine Falcon/hawk
Explanation:
i really dunno if you are talking about brids that can't fly or not.
A 2.50 kg ball moving at 7.50 m/s is caught by a 70.0 kg man while the man is standing on ice. How
fast will the man / ball combination be moving after the ball is caught by the man?
Explanation:(2.5kg) (7.5) m/s +70 kg(0) =(2.5kg +70 kg (v3) 18. 75 =72.5 =v3
v3=.26m/s 2.5+70
what instrument will be used to measure the volume of a box
Answer:
A ruler.
Explanation:
Just measure height, length and width and multiply each.
why an inclined is considered as simple machine
REAL ANSWER = BRAINLIST LOOK AT PICS ATTACHED
Answer:
there are no pictures attached.
Lithium (chemical symbol Li) is located in Group 1, Period 2. Which is lithium most likely to be? O A. A soft, shiny, highly reactive metal OB. A soft, shiny, highly reactive nonmetal O C. A gaseous, highly reactive nonmetal O D. A metalloid with properties of both metals and nonmetals SUBMIT
Answer:
A. A soft, shiny, highly reactive metal
Explanation:
Lithium is located in Group 1, Period 2. lithium is most likely to be soft, shiny, highly reactive nonmetal. Hence option A is correct.
What is Atom ?Atom is smallest entity of a body. Body is made up of atoms. it is basic building block of a body. An atom consist of electrons, protons and neutrons as sub atomic particle. whole mass of the atom is concentrated at the center of the atom which we call it as nucleus, nucleus consist of proton and neutron. Electron revolve around the nucleus at determined(fixed) orbit. Total number of protons in the atom decides the atomic number and the elements in the periodic table.
The electrons which are completely filled orbitals are called as core shell electrons and which are not filled completely are called as valence electron. valence electrons are responsible for physical and chemical properties of the element. Elements which are on same column in periodic table have same number of valence electrons .
Hence option A is correct.
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The law of universal gravitation states that any two objects in the universe, without exception,
a
repel each other
b
attract each other
c
create friction
Answer:
attract each other
Explanation:
..........