Based on the mass of the object, and its acceleration, the time taken to reach a speed of 2.0 m/s is 4 seconds.
How many seconds will the object take to reach the required speed?The time can be found as:
= Required speed / Acceletation
Accelaration is:
= Force / Mass
= (0.99iN + 0jN) / 2kg
= 0.5 ms⁻²
Time taken is:
= 2 / 0.5
= 4 seconds
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Since the force that axts on the object is the resultant force, the time taken is 0.8 s.
What is resolution of forces?Since force is a vector, it can be resolved into its components. From the complete question, the componenets of the force are;
Vertical component;
5N sin 373N sin 9017 N-20NTotal = 3 + 3 + 17 - 20 = 3 NHorizontal component;
5N cos 373N cos 90Total = 3.99 + 0 = 4Resultant force = √(3)^2 + (4)^2 = 5N
Now;
F = ma
a = F/m
a = 5N/2. 0 kg
a = 2.5 m/s^2
Given that;
v = u + at
since u = 0 (object started from rest)
2 = 2.5 * t
t = 2/2.5 = 0.8 s
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Why is red the last color seen at sunset?
A. It is bent by raindrops.
B. It is bent the most by the air.
C. It is scattered the least by the air.
D. It reflects off the atmosphere.
Answer: Within the visible range of light, red light waves are scattered the least by atmospheric gas molecules. So at sunrise and sunset, when the sunlight travels a long path through the atmosphere to reach our eyes, the blue light has been mostly removed, leaving mostly red and yellow light remaining.
Explanation:
What is the initial velocity of the object represented by
the graph?
m/s
Velocity vs Time
1
2.
3
4
ch
5
Time (s)
Answer:
at t=0 , V = 5 so it's 5 m/s
Explanation:
it is 5. 5 is the answer.
The strength of the force of friction depends on which two factors?
O A. The objects' sizes and weights
O B. How hard the surfaces push together and the size of the object
C. How hard the surfaces push together and the types of surfaces
involved
о
D. The heat generated by the friction and the types of surfaces
involved
Options A and D are correct. The strength of the force of friction depends on the objects' sizes and weights and the heat generated by the friction and the types of surfaces involved.
What is the friction force?It is a type of opposition force acting on the surface of the body that tries to oppose the motion of the body. its unit is Newton (N).
Mathematically, it is defined as the product of the coefficient of friction and normal reaction.
On resolving the given force and acceleration in the different components and balancing the equation gets. Components in the x-direction.
The strength of the force of friction depends on the two factors, as;
A. The objects' sizes and weights.
D. The heat generated by the friction and the types of surfaces involved.
Hence, options A and D are correct.
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What could Alex do to make the reaction happen faster than normal?
Answer:
Chris lives farther from the school than Alex lives, and Chris walked to school at a faster rate than Alex walked.
Explanation:
What needs to be done to balance this equation?
Question 4 options:
Do nothing (equation is balanced).
Change O 2 to O 4 on the left side of the equation.
Add coefficient 2 to O 2 on the left side of the equation.
Remove coefficient 2 in front of H 2O on the right side of the equation.
Answer:
Add the coefficient 2 to O2 on the left side of the equation. (O2 represents a molecule of oxygen gas)
The equation shows an equal number of H atoms and C atoms on either side, but the number of O atoms must also balance.
Homes with multiple bathrooms have outlets connected in series with a red reset button in the system
Homes with multiple bathrooms have outlets connected in series with a red reset button in the system. The reason for this circuit design is to prevent electrocution.
What is red reset button?The water heater's reset switch provided on the upper thermostat of an electric water heater. If the button is on, the switch would have tripped and the reset is required.
To prevent any kind of injury or killing of a person by electric shock is called as the electrocution. This can be prevented only by outlets connected in series with a red reset button.
Thus, the reason for this circuit design is to prevent electrocution.
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Jonathan and Cody’s older brother Josh, who is pictured in the Figure below, is standing at the top of a half-pipe at Newton’s Skate Park. Gravity is exerting a downward force on the skateboard as seen in the picture. Why doesn’t it tip over the edge and start rolling down the side of the half-pipe?
In order to begin moving a Mass (Accelaration) will solve for the force required to move the skateboard. Mass(9.8) will give you the force needed to move the skateboard originally
What is acceleration ?Acceleration can be defined as the rate of change of velocity with respect to time, is a vector quantity associated with both magnitude and direction.
Acceleration can be up two types such as Uniform and Non-uniform acceleration, in a circle where speed remains constant but the direction is changing followed by velocity changes, and the body is said to be accelerated.
The average acceleration can be defined as the total change in velocity in the given interval period of time means the total time taken for the change. For a given interval of time, it is represented as ā.
Instantaneous acceleration can be defined as the ratio of change in velocity in a given time interval such that the time interval goes to zero.
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if a body is moving with constant linear positive acceleration
a) It moves with constant velocity
b) It remains at rest.
c) It decreases its velocity at constant rate.
d) It increases its velocity.
Answer:
D
Explanation:
It says constant positive linear acceleration, which means that the velocity increases at a constant rate.
If Weight=mg and Force=ma, and the only force acting on an object is gravity, then the masses cancel each other out and you are left with g=a. Therefore, that must mean everything on earth must fall at the same rate. Is this true Why or why not?
The correct answer to question:
Explanation:
When g=a, that means everything on earth fall at the same rate.
Why does everything fall to the earth at the same rate?As such, all objects free fall at the same rate regardless of their mass. Because the 9.8 N/kg gravitational field at Earth's surface causes a 9.8 m/s/s acceleration of any object placed there, we often call this ratio the acceleration of gravity.
Why is gravity equal to acceleration?When objects fall to the ground, gravity causes them to accelerate. Acceleration is a change in velocity, and velocity, in turn, is a measure of the speed and direction of motion. Gravity causes an object to fall toward the ground at a faster and faster velocity the longer the object falls.
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Which equation is valid in the x axis for any projectile?
Answer:
Vx = u*cos θ
Explanation:
where ,
θ = angle of projection with X - axis(horizontal)
u = initial velocity of projectile
Vx = velocity of projectile with respect to x-axis
Which type of radiation occur during nuclear processes? (Select all that apply)
A. Gravitational radiation
B. Acoustic radiation
C. Electromagnetic radiation
D. Particle radiation
*don’t answer if you don’t know*
Answer:
Particle radiation
Explanation:
nuclear process is in atom nucleas maybe emit the electron ,neutrino or anti-neutrino
How long does it take jupiter to rotate on its axis.
Answer:
10 hours
Explanation:
Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
Option 3
Explanation:
As the roots of the plant hold soil in place, it helps prevent soil erosion.
The other options are true, but they are not correct explanations as to why plants help prevent erosion.
In one or two sentences, explain design modifications which were implemented after the tacoma bridge disaster
The modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations.
Why Tacoma Bridge disaster occurred?While marching, the natural frequency of the vibrations of marching soldiers matched up with the resonant frequency of the bridge. This resulted in the collapsing of the bridge in seconds.
Because of the disaster of the Tacoma Narrows Bridge, the bridge was strengthened by adding trusses as well as openings below road decks so as to decrease vibrations caused by running vehicles on the bridge.
Thus, the modifications that are implemented after Tacoma bridge disaster are added trusses and openings below road decks to decrease oscillations
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6. Which point on the skate park has the highest potential energy?
7. Which point on the skate park has the highest kinetic energy?
8. Where would the skater's speed be the fastest?
9. Where would the skater's speed be the lowest?
10. What you increasing the friction of the surface do to the skater's speed?
Answer:
6) Point G as it is the steepest.
7) Point G and F.
8) Between D and F.
9) Between C and D.
10) The skater will go slower with more friction and faster with less.
Explanation:
A bullet of mass 50 g is fired from below into a suspended object of mass 450 g. The object rises through a height of 1.8 m with bullet remaining inside the object. Find the speed of the bullet. Take g = 10 ms².
Hello!
We can begin by using the Work-Energy theorem. The initial energy is the kinetic energy of the combined mass of the bullet and suspended object, while the final energy is the GPE of the combined objects.
In equations:
[tex]E_i = \frac{1}{2}mv^2\\\\E_f = mgh[/tex]
m = combined mass of the bullet and suspended object (0.5 kg)
v = velocity of block system after struck (? m/s)
g = acceleration due to gravity (10 m/s²)
h = final height of combined objects (1.8 m)
Set the two equal (Conservation of Energy) and solve for velocity.[tex]\frac{1}{2}mv^2 = mgh \\\\\frac{1}{2}v^2 = gh \\\\v^2 = 2gh \\\\v = \sqrt{2gh}\\\\v = \sqrt{2(10)(1.8)} = 6 \frac{m}{s}[/tex]
Now, we can use the conservation of linear momentum to solve.
Recall that:
[tex]p_i = p_f[/tex]
For an inelastic collision (objects stick together):
[tex]m_1v_1 + m_2v_2 = (m_1 + m_2) v_f[/tex]
Let m1 represent the bullet and m2 represent the suspended object.
Initially, the suspended object has no velocity, so v2 = 0. Therefore:
[tex]m_1v_1 = (m_1 + m_2)v_f\\\\v_1 = \frac{(m_1 +m_2)v_f}{m_1}\\\\v_1 = \frac{(0.5)(6)}{0.05} = \boxed{60 \frac{m}{s}}[/tex]
3. A shuffleboard player applies a horizontal force of 10.0 N to the shuffleboard puck (400 g). If the puck accelerates at 24.5 m/s/s as the player continues to push it, what is the frictional force on the puck?
Answer:
Friction = 2 N
Explanation:
F = ma
= .4 * 24.5 = 9.8 N net force 10 N by stick means Ffriction = 2 N
The frictional force acting on the shuffleboard puck is 6.08 N.
What is meant by frictional force ?Frictional force is defined as the resistive force that prevents the relative motion between two surfaces that are in contact with each other.
Here,
Horizontal force applied on the shuffleboard puck, F = 10 N
Mass of the shuffleboard puck, m = 400 g = 0.4 kg
Acceleration of the shuffleboard puck, a = 24.5 m/s²
According to Newton's third law,
F - f = ma
where f is the frictional force acting on the shuffleboard puck.
So, the frictional force,
f = F - ma
f = 10 - (0.4 x 9.8)
f = 10 - 3.92
f = 6.08 N
Hence,
The frictional force acting on the shuffleboard puck is 6.08 N.
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How long would the measured lifetime be if the neutron were moving at 0. 936c?
The lifetime of the neutron will be t=40 minutes when the neutron is moving at a speed of 936 c.
What will be life of neutron?when neutrons are free and floating alone outside of an atom, they start to decay into protons and other particles.The formula for the life of the neutron will be given by:
[tex]t=\dfrac{\Delta t_o}{\sqrt{1-\dfrac{v^2}{c^2}}}[/tex]
Here
t= Lifetime
to=Average life
v= velocity
c=speed of light
Since the average life of the neutron is about 14 minutes or 840 seconds.
Velocity =0.936c
By putting the values in the question
[tex]t=\dfrac{840}{\sqrt{1-\dfrac{(0.936c)^2}{c^2}}}[/tex]
[tex]t=\dfrac{840}{\sqrt{0.123}}[/tex]
[tex]t=\dfrac{840}{0.35}=2400\ \ sec\\\\[/tex]
Hence the lifetime of the neutron will be t=40 minutes when the neutron is moving at a speed of 936 c.
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A ringing bell is located in a chamber. when the air is removed from the chamber, why can the bell be seen vibrating but not be heard?
Answer:
sound requires a medium to be propagated
Explanation:
sound is a mechanical wave and thus requires a medium to be propagated. Air this case is a medium of travel for the ringing bell in the chamber that is why sound can be heard. When air in the chamber it becomes a vacuum that is why sound is not heard
The kinetic energy, k, of an object varies jointly with the mass of the object and the square of the velocity of the object. a 50-kg object moving at a velocity of 20 meters per second has 10,000 joules of kinetic energy. how many joules of kinetic energy does a 25-kg object moving at a velocity of 10 meters per second have? 250 joules 1,250 joules 2,500 joules 3,125 joules
Answer:
KE = 1/2 M V^2 = 1/2 * 25 * 10^2 = 1250 J
Check
M2 = 1/2 M1
V2 = V1 / 2
E2 = 1/2 * 1/4 E1 = E1 / 8 = 10000 / 8 = 1250 J
Answer:
B. 1,250 joules
Explanation:
I need severe help
a cat ran west for 30 meters and it took them 5 seconds, what was the average speed of the cat? Don’t forget units!
Hello please answer this I need it right now
Nonsense:report
Right answer:brainliest
Answer:
do you have an answer key
Explanation:
A capacitor that uses 0. 40- mmmm -thick paper as a dielectric is charged to the maximum sustainable voltage. What is the strength of the induced electric field?
The maxiumum strength of the induced electric field in the capacitor that uses thick paper as dielectric material is 16 x 10⁶ V/m.
What is maximum electric field strength?
The maximum electric field strength above which an insulating material begins to break down and conduct is called its dielectric strength.
The dielelectric strength of paper is given as;
E = 16 MV/m = 16 x 10⁶ V/m
Thus, the maxiumum strength of the induced electric field in the capacitor that uses thick paper as dielectric material is 16 x 10⁶ V/m.
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As people age, they become unable to control their cardiorespiratory fitness levels.
Answer:
False
Explanation:
PLS HELP ME Which object has the greatest kinetic energy?
A: a truck with a mass of 3,500 kg moving at 30 m/s
B: a person with a mass of 73 kg running 6 m/s
C: a locomotive engine with a mass of 205,000 kg moving 5 m/s
D: a fast pitched baseball with a mass of .5 kg moving at 46.9 m/s
A locomotive engine with a mad of 205000kg moving with 5m/s
Explanation:
[tex]from \: the \: options \: substitute \: the \: formulars \: for \: kinetic \: energy \\ for \: opton \: a \: ke = \frac{1}{2} mv {}^{2} = \frac{1}{2} \times 3500 \times 30 {}^{2} = 1575000 \\ for \: option \: b \: ke = \frac{1}{2} mv {}^{2} = \frac{1}{2} \times 73 \times 6 {}^{2} = 1314 \\ for \: option \: \: c = \frac{1}{2}mv {}^{2} = \frac{1}{2} \times 205000 \times 5 {}^{2} = 2562500 \\ for \: option \: d \: = \frac{1}{2}mv {}^{2} = \frac{1}{2} \times 0.5 \times(46.9) {}^{2} = 549.9025 \\ from \: the \: analysis \: above \: the \: options \: that \: has \: the \: highest \: kinetic \: energy \: is \: a \: locomotive \: engine \: with \: a \: mass \: of \: 205000kg \: moving \: with \: a \: velocity \: of \: 5 \frac{m}{s} [/tex]
Click on the ray diagram that shows the proper positioning of an image formed by a concave lens.
I don't think so
Answer:
h
Explanation:
beautiful answer
what is the kinetic energy of a 500 kg car moving at 18 m/s?
Answer:
81000 j
Explanation:
KE = 1/2 m v^2 = 1/2 500 18^2 =
A flat, square surface with side length 4.35 cm is in the xy-plane at z=0.
Calculate the magnitude of the flux through this surface produced by a magnetic field
B⃗ = (0.200T)i^ + (0.250T)j^ + (0.550T)k^ .
The textbook isn't being helpful, I'll appreciate a good explanation!
Answer:
I X j = k (perpendicular to plane)
j X k = 0
i X k = 0 cross products for vectors i, j, k
Flux = B dot A and only B in the k direction is relevant
Flux = .550 T * .0435^2 m^2 = .00104 Webers-m^2
The magnitude of the flux through the given surface produced by the magnetic field B is 10.73 T cm².
What is magnetic flux?Magnetic flux is a measure of the amount of magnetic field passing through a given surface. It is defined as the product of the magnetic field B and the area A that it passes through, multiplied by the cosine of the angle between the magnetic field and the surface normal:
Φ = B ⋅ A ⋅ cos(θ)
Where Φ = is the magnetic flux,
B = is the magnetic field,
A = is the area of the surface,
θ = is the angle between the magnetic field and the surface normal.
In other words, magnetic flux is a measure of how much magnetic field passes through a surface, taking into account both the strength of the magnetic field and the orientation of the surface with respect to the field.
Magnetic flux is an important concept in electromagnetism and is used to describe the behavior of magnetic fields in a variety of applications, including generators, motors, and transformers. It is also used in the study of magnetism in materials, such as ferromagnetic materials, where the flux density is an important property.
Here in the question,
To calculate the flux through the given surface produced by the magnetic field B, we can use the formula:
Φ = ∫∫ B · dA
Where Φ = is the magnetic flux,
B = is the magnetic field,
dA = is an infinitesimal area vector pointing outward from the surface.
Since the surface is a flat square in the xy-plane, its normal vector is the unit vector k^. Therefore, the outward-pointing area vector dA can be expressed as:
dA = dx dy k^
Where dx and dy = are infinitesimal elements of length in the x and y directions, respectively.
Integrating over the surface, we have:
Φ = ∫∫ B · dA
= ∫∫ (0.200T i^ + 0.250T j^ + 0.550T k^) · (dx dy k^)
= ∫∫ 0.550T dx dy
= 0.550T ∫∫ dx dy
= 0.550T (4.35 cm)²
Φ = 10.73 T cm²
Therefore, the magnitude of the flux through the given surface produced by the magnetic field B is 10.73 T cm².
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
Fuel switching
Explanation:
Adaptation
It denotes to be changed according to the change happening in surroundingsIt also denotes not to run away from danger rather than adapting to live with the fear.We know fuel will be finished one day so we are shifting to new fuel sources.
The mass number of an isotope of uranium is 238, and its atomic number is 92. which symbol best represents this isotope of uranium? subscript 92 upper u. superscript 238 subscript 92 upper u. superscript 92 subscript 238 upper u. superscript 92 upper u.
The symbol that represents the isotope that has a mass number of 238, and an atomic number of 92 is 238 subscript 92 upper u.
What is an isotope?Isotopes are any of two or more forms of an element where the atoms have the same number of protons, but a different number of neutrons within their nuclei.
This means that isotopes possess different mass numbers but the same atomic number.
According to this question, the mass number of an isotope of uranium is 238, and its atomic number is 92. This means that the symbol of this isotope is as follows: 238/92 U.
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Answer:
B. [tex]\frac{238}{92}[/tex] U
Explanation:
edge 2022