Answer:
Acceleration of the box = 0.2 m / s²
Explanation:
Given:
Mass of box = 200 kg
Magnitude of the tension = 2,000 N
Find:
Acceleration of the box
Computation:
Ma = T - Mg
200(a) = 2,000 - (200)(9.8)
200(a) = 2,000 - 1960
200(a) = 40
a = 40 / 200
a = 0.2
Acceleration of the box = 0.2 m / s²
Answer:
The acceleration is 0.2 m/s^2.
Explanation:
Tension, T = 2000 N
mass, m = 200 kg
Let the acceleration is a.
So, by the use of Newton's second law
Net force = mass x acceleration
T - mg = ma
2000 - 200 x 9.8 = 200 x a
2000 - 1960 = 200 a
a = 0.2 m/s^2
Solve this question for 5 points
Answer:
M_b = 2M_a
Explanation:
From gravity equation, we know that;
g = GM/R²
Where;
g is acceleration due to gravity
G is the gravitational constant
M is mass
Thus, making mass(M) the subject, we have;
M = gR²/G
Since we want to find the mass of B so that value of g on B is half that of its value on A.
Thus;
> g_b = ½g_a
> g_b/g_a = ½
Also, we are told that;
> R_a = ½R_b
> R_b/R_a = 2
If M_a = g_a•R_a²/G
And M_b = g_b•R_b²/G
Thus;
M_b/M_a = (g_b•R_b²/G)/(g_a•R_a²/G)
G will cancel out to give;
M_b/M_a = (g_b•R_b²)/(g_a•R_a²)
Rearranging for ease of simplification, we have;
M_b/M_a = (g_b/g_a) × (R_b/R_a)²
Plugging in the relevant ratios gives;
M_b/M_a = ½ × 2²
M_b/M_a = 2
M_b = 2M_a
Please help me with this..show all the steps also...
Given,
initial velocity, u = 10m/s
acceleration, a = -8m/s²
time, t = 2s
[tex]we \: know \: that \\ s = ut + \frac{1}{2}a {t}^{2} \\ = > s = (10m {s}^{ - 1} \times 2s) + ( \frac{1}{2} \times (- 8m {s}^{ - 2}) \times {(2s)}^{2}) \\ = >s = 10m + (- 8m) \\ = > s = 2m[/tex]
This is the answer.
Hope it helps!!
ANSWER ASAP
What causes magnetic domains
A. Magnetic fields of atoms aligning
B. Electricity moving through iron
C. Iron being placed near a magnet
D. Magnetic poles magnets attracting each other
slader A jet is circling an airport control tower at a distance of 15.9 km. An observer in the tower watches the jet cross in front of the moon. As seen from the tower, the moon subtends an angle of 8.74x10-3 radians. Find the distance traveled (in meters) by the jet as the observer watches the nose of the jet cross from one side of the moon to the other.
Answer:
y = 138.96 m
Explanation:
The angle subtended by the moon is the mean of the angle of the arc between the two most extreme points of the moon, we can see that the angle is very small, so we can approximate this arc to a straight line and then use the trigonometric relationships
sin θ = y / L
where L = 15.9 10³ m and θ = 8.74 10⁻³ rad
y = L sin θ
y = 15.9 10³ sin (8.74 10⁻³)
y = 15.9 10³ 0.0087399
y = 138.96 m
An electron experiences a downward force of 12.8×10-19 N while traveling in a magnetic field of 8×10-5 T west, what is the magnitude of the velocity?
Answer:
[tex]v=10^5\ m/s[/tex]
Explanation:
Given that,
Magnetic force acting on an electron, [tex]F=12.8\times 10^{-19}\ N[/tex]
The magnitude of the magnetic field,[tex]B=8\times 10^{-5}\ T[/tex]
We need to find the magnitude of the velocity. We know that the magnetic force is given by :
[tex]F=qvB[/tex]
Where
v is the velocity
So,
[tex]v=\dfrac{F}{qB}\\\\v=\dfrac{12.8\times 10^{-19}}{1.6\times 10^{-19}\times 8\times 10^{-5}}\\\\v=10^5\ m/s[/tex]
So, the magnitude of velocity is[tex]10^5\ m/s[/tex].
Which practice is an unsustainable way of managing resources?
Please help
Answer:
I would say it is recycling nonrenewable minerals instead of throwing them away.
Explanation:
using grocery bags only once before disposing them is also bad, but plastic is not really a resource compared to how minerals are resources.
if we recycle nonrenewable resources instead of throwing them away we would damage true resources.
which best esplains how the body maintains homeostasis
Explanation:
Through the various systems in the body for example the excretory system helps maintain homeostasis by filtering waste from blood, gets rid of waste and regulates fluid levels in the body.The respiratory system helps by giving the blood stream the oxygen it needs..
I hope this helps
• A car is initially traveling at 50.0 km/h. The brakes are applied and
the car stops over a distance of 35 m. What was magnitude of the
car's acceleration while it was braking?
Answer:
Explanation:
The equation for acceleration is
[tex]a=\frac{v_f-v_0}{t}[/tex] where vf is final velocity, v0 is initial velocity and t is time in seconds. But we have a problem here because the initial velocity is given in km/hr while the distance is given in meters. We are going to change 50.0 km/hr to m/sec:
[tex]50\frac{km}{y\hr}*\frac{1000m}{1km}*\frac{1hr}{3600s}[/tex] which gives us an initial velocity of
v = 13.9 m/s
But that still doesn't give us anything for the time, which is the denominator of the acceleration equation. We have to find it. Since this is one-dimensional travel, use d = rt to find the time it took for the car to travel 35 meters at a rate of 13.9 m/s:
35 = 13.9t and
t = 2.5 seconds. Now we can use that in the acceleration equation:
[tex]a=\frac{0-13.9}{2.5}[/tex] so
a = -5.6 m/s/s The negative sign tells us that the car is slowing down, as we would expect it to be when it is traveling at a certain rate and eventually stops.
Cuando una persona sube y baja una escalera, Cuanto vale su desplazamiento y cual es la medida de su trayectoria.
Answer:
Primero, definimos el desplazamiento como la distancia entre la posición final y la posición inicial.
Así, si comenzamos abajo, luego subimos la escalera, y luego bajamos, la posición final y la posición inicial serán la misma
por lo que el desplazamiento es igual a cero.
La medida recorrida es el espacio total recorrido.
Es decir, si entre el principio y el final de la escalera hay una distancia D.
La persona que sube y baja, recorre esta distancia dos veces.
Entonces cuando una persona sube y baja la escalera, la medida de su trayectoria será 2*D.
A spinning satellite begins to unfold two solar panels as shown. As the panels extend from the satellite, what is the result?
Option A and B are correct.
We have a spinning satellite which begins to unfold two solar panels as shown in the figure.
We have to investigate which of the given statements are true.
What is the relation between the linear velocity (v) and angular velocity (ω) of a body undergoing circular motion in the circle of radius r?The relation the linear velocity (v) and angular velocity (ω) of a body undergoing circular motion in the circle of radius r is -
v = rω
According to the question - two solar panels unfolded themselves. The key point to understand here is that initially when the panels were folded, each and every individual particle inside the panel were closer to the rotational axis. However, when they unfolded, each and every particle inside the panels went away from the rotational axis. In a general sense, for a individual particle inside the panel, assume that initially the its distance from center was 'r' and after unfolding it became 'R' such that R > r. Therefore, using the formula -
v = rω
ω = [tex]\frac{v}{r}[/tex]
Now, ω [tex]\alpha[/tex] [tex]\frac{1}{r}[/tex] ,
As r increased to R, the angular velocity decreases.
Now, we know that the angular momentum (L) is given by -
L = mvr
As r increases, L increases.
Therefore, the angular momentum increases.
Hence, Option A and B are correct.
To solve more questions on rotational motion, visit the link below -
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The Indianapolis speedway consists of a 2.5 mile track having four turns, each 0.25 mile long and banked at 9 12'
Answer: Your question is missing below is the question
Question : What is the no-friction needed speed (in m/s ) for these turns?
answer:
20.1 m/s
Explanation:
2.5 mile track
number of turns = 4
length of each turn = 0.25 mile
banked at 9 12'
Determine the no-friction needed speed
First step : calculate the value of R
2πR / 4 = πR / 2
note : πR / 2 = 0.25 mile
∴ R = ( 0.25 * 2 ) / π
= 0.159 mile ≈ 256 m
Finally no-friction needed speed
tan θ = v^2 / gR
∴ v^2 = gR * tan θ
v = √9.81 * 256 * tan(9.2°) = 20.1 m/s
Find the magnetic force experienced by a proton moving with the speed of 4x10^5 m/s in the magnetic field B of magnetic 7x10^-5 T.
A- Fmagnetic = 24.8x10^-19 N
B- Fmagnetic = 34.8x10^-19 N
C- Fmagnetic = 44.8x10^-19 N
D- Fmagnetic = 54.8x10^-19 N
Answer:
F = q v B where B is the component of the field perpendicular to v.
F = 1.6E-19 * 4E5 * 7E-5 = 4.48* 10^-18 N = 44.8 * E-19 N
newtons second law lab report link
Answer:
ghittu iihg उह्स उउह्स उग्य्किव जिक्ह्ब
Một xe đang di chuyển với tốc độ 36km/h thì gia tốc và sau 2s xe lên tới tốc độ 54km/h. Tính gia tốc của xe trong 2s ?
Answer:
which language is these
Explanation:
we only use english , Hindi ,tamil , bengali and Malayalam
please tell us that it is which language. From that we will slove this
Answer:
a = vf-vi / t
a = (54 km / h-36 km / h) / 2
a = 18/2
a = 9ms⁻²
The _____ variable is the factor that is changed or manipulated; the dependent variable is the factor that depends on the independent variable.
control
independent
hypothesis
theory
Independent variable
The independent variable is a variable whose value is independent of the value of another variable. The dependent variable is a variable whose value is determined by the value of another variable.The independent variable is the factor that is changed or manipulated; the dependent variable is the factor that depends on the independent variable.For more information:
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a ball is kicked and follows a parabolic trajectory. in mid flight, what is the net horizontal force of the ball?
Answer:
The net horizontal force is zero.
Explanation:
When an object is in the air, the primary force acting on the object will be the gravitational force, which pulls the object down to the ground.
There is also air resistance, a force that depends on the shape and velocity of the object, and can be ignored.
So, once the ball is already kicked and is in the air, the only force acting on the ball will be the gravitational force, which is a vertical force.
Thus, there is not a horizontal force.
Then the net horizontal force is zero, if we are ignoring the air resistance.
A convex mirror of radius of curvature 1.6 m has an object placed at a distance of 1.0 m from it. Find the position of image and the magnification.
Answer:
The image is formed at 0.44 m in front of the mirror
magnification (M) = 0.44
Explanation:
Applying, mirror formular
1/f = (1/u)+(1/v).................... Equation 1
Where f = Focal length of the convex mirror, u = object distance, v = image distance.
Using the real is positive convection,
From the question,
Given: f = -1.6/2 = -0.8 m( The focal length of a convex mirror is vitual), u = 1.0 m
Substitute these values into equation 1
-1/0.8 = (1/v)+(1/1)
Solve for v
1/v = 1.25+1
1/v = 2.25
v = 1/2.25
v = 0.44 m
Hence the image is formed at 0.44 m in front of the mirror
Magnification (M) = v/u
m = 0.44/1
m = 0.44
4.Two carts, A and B, sit in front of you. They look identical, and you are told that they are made of the same material. Cart A is at rest on an air track and cart B is given a constant velocity directed to the right toward Cart A on the air track. Cart B collides with cart A elastically. After the elastic collision, both carts move to the right, the velocity of cart B being smaller than what it was before the collision. What can you conclude based on only what you have observed
Answer:
Cart B loses some of its initial kinetic energy and cart A gains kinetic energy.
Explanation:
Since both cart A and cart B have identical masses, and cart B moves with a smaller velocity after the collision than it was moving with before the collision, and also, the collision is elastic. It implies that the initial kinetic energy of cart B equals the final kinetic energy of cart A and cart B after the collision.
Since the initial kinetic energy of cart B is shared between cart A and cart B and cart B moves with lesser velocity after the collision, it implies that cart B has a smaller kinetic energy than its initial kinetic energy before the collision.
And also, since cart A is initially at rest and moves to the right after the collision, it gains kinetic energy.
Thus, cart A has a higher final kinetic energy after the collision. Also, cart A has a smaller kinetic energy after the collision than the initial kinetic energy of cart B, since it is the difference between cart B's initial and final kinetic energies.
So, from our observation, we conclude that cart B loses some of its kinetic energy and cart A gains kinetic energy.
females have two of wich reprodutive structure
Answer:
ovaries
Explanation:
they have two ovaries one on either side of the uterus.
I hope this helps
The diagram shows the electric field lines surrounding two positive point charges. If the charge on the right were replaced with a negative charge, which of these would need to change to make a correct representation of the electric fields? (Choose all that apply)
A. Field Lines would full in between the two charges (instead of leaving a blank area at point D
B. The field lines around both charges would change direction.
C. The field lines would get closer together
D. The arrows on the field lines surrounding the negative charge would need to point toward instead of away from the charge.
Answer:
Explanation:
The wording on some of these choices is very strange; I'm not sure exactly what they are stating. First of all, A. is definitely a choice because if both the charges were opposite, they would be attracted to one another as opposed to be repelled away from one another, as they are when they are both positive. What happens is that the charges go OUT from the positive charge and INTO the negative; so as far as the field lines around both charges would change direction...no; only the direction of the field lines would change on the positive charge (which is the one on the left). In that space where D is filled in by the field lines going OUT of the positive charge and INTO the negative one, the lines there are naturally closer together, and that is the point where the charge is the greatest. So if that is what is meant by the field lines getting closer together, then yes, they do. As far as choice D. again the field lines on the negative charge don't change, only the ones on the positive charge change.
The arrows on the field lines surrounding the negative charge would need to point toward instead of away from the charge.
These pattern of lines, sometimes referred to as electric field lines, point in the direction that a positive test charge would accelerate if placed upon the line. As such, the lines are directed away from positively charged source charges and toward negatively charged source charges.
What is negative charge ?“ When an object has more electrons than protons then the object is said to be negatively charged.”
What is positive charge ?“When an object has more protons than electrons, the object is said to be positively charged.”
Know more about field lines here
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A vector points -43.0 units along the x axis, and 11.1 units along the y axis. Find the Direction of the vector.
Answer:
Explanation:
The direction of the vector implies only its angle, not its magnitude. The direction of the vector is found in
[tex]tan^{-1}(\frac{y}{x})[/tex] so
[tex]tan^{-1}(\frac{11.1}{-43.0})=-14.5[/tex] but since we are in QII (where x is negative and y is positive) we have to add 180 to this number to get a direction of 165.5 degrees
What was the initial speed of a car if its speed is 40 m/s after 5 seconds of accelerating at 4 m/s2? A. 10 m/s B. 60 m/s C. 25 m/s D. 20 m/s
Answer:
Vi = 20 m/s
Explanation:
Explained in the picture below
please tell its urgent
Answer:
1) 4,422 meters.
2) 14.01 meters.
Explanation:
A round in a circular track means a complete rotation around its perimeter.
So, if the circular track is 44 meters long, 100.5 rounds around it means that the object did travel the 44 meters 100.5 times.
a) The total distance traveled by the object is:
44m*100.5 = 4,422 meters.
b) The displacement is defined as the distance between the final position and the initial position.
Notice that if you do a complete round, you end in the same position that you started.
So if you do 100 rounds, you end in the same position that you started.
If you do 100.5 rounds, we can think this as:
100 rounds + 0.5 round
So you pass for the starting point 100 times, and then you do half a round, this means that you end in the exact opposite part of the circle of the one where you started.
Then the displacement, the distance between the final position and the initial position, is equal to the diameter of the circle.
We know that the perimeter of the circle is 44m
And remember that the perimeter of a circle of diameter D is:
P = 3.14*D
Then the diameter if this circle is given by:
44m = 3.14*D
44m/3.14 = D = 14.01m
The displacement is 14.01m
A blackbody radiator was expected to give off energy of increasing frequency
as its temperature increased. Which of the following ideas provided an
important step toward understanding why this was not observed?
A. Light is quantized and must be absorbed as a unit.
B. Electrons can act as both waves and particles.
C. Matter is quantized and cannot be broken down.
D. Large objects can be viewed as acting as waves.
Answer:
B.
Explanation:
Makes more sense to me
what do you mean by motion in one direction.
Answer:
When a body moves along an imaginary straight line towards a single direction, its motion is said to be in one direction. This means that the body moves in a single direction for all the time.
Answer:
When a body moves along an imaginary straight line towards a single direction, it's motion is said to be in one direction . This means that the body moves in a single direction for all the time.Which model of the universe is the most widely accepted, and what does it
predict?
A. A flat universe, in which the universe stops expanding but does
not contract
B. A closed universe, in which the universe never stops expanding
C. A closed universe, in which the universe stops expanding but does
not contract
D. An open universe, in which the universe never stops expanding
Answer:
D An open universe, in which the universe never stops spending
Explanation:
A P E X
What is the maximum number electrons that can occupy any d orbital?
Answer:
Only ten electrons
Explanation:
[tex]{ \tt{nd {}^{10} }}[/tex]
What is the difference between heat capacity and specific heat capacity? I want the meaning please.
Answer:
The heat capacity of a body is defined as the heat required to raise it's temperature by me degree or one kelvin.while specific heat capacity of a substance is defined as the heat required to the temperature of a unit mass of it through one degree or one kelvin.
I hope it helps
why does the green colour of iron (ii) chloride change to yellow when chlorine gas is bubbled into it
Answer:
FeCl2 has a high melting point.
Explanation:
Iron is seen to get oxidized by addition of chlorine 3 as the product is rust colored and on dissolving in water has a yellow orange color. This is characterized by the aquatic iron and is due to the monohydroxylength of your pencil is 6 cm. what does it mean?
Answer:
It simply means that, the pencil is long enough to attain a length of six (6) centimeters when measured with a measuring tool such as a ruler, tape, etc.
Explanation:
A scientific method can be defined as a research method that typically involves the use of experimental and mathematical techniques which comprises of a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.
Measurements refers to a process which typically involves identifying and determining the dimensions of a physical object. The dimensions include important parameters such as width, height, length, area, volume, circumference etc.
Hence, a pencil whose length is measured as 6 centimeters has a physical dimension that covers a distance of six (6) centimeters in terms of size.
In conclusion, the pencil would cover a length of six (6) centimeters when measured vertically and a corresponding height of six (6) centimeters when measured horizontally.
