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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Which requires more force to accelerate?
an object that weighs 20 kg
an object that weighs 5 kg
Answer:
An object that weighs 20 kg
Explanation:
Acceleration and mass are indirectly proportional.
Which year was pluto no longer considered a planet?.
Having a good range of motion is super important because that is what allows you to ________________.
A.
do different activities
B.
run farther
C.
lose more weight
D.
balance
What are the criterions that need for mechanical work?
Mechanical work is the work done by a force on a mechanical body like machines .
When some mechanical force is applied on the machine the machine does some work which is mechanical work
It's a scaler quantity and have units as Joules(J)
The main criterion is mechanical energy,Force , Displacement (Not mandatory)
What are stars made of?
Answer: The churning nuclear forges at the centres of stars produce light and heat, creating stars.
Explanation:
Answer: Hyrdrogen and Helium.
Explanation:
A force of 26. 4lb is applied to an area of 1. 71in 2 what is the pressure
Answer:
Dont kno
Explanation:
Dont
1150 kg car is on a 8.70 degree hill. What’s the x component of the normal force
Answer:
The x - component of the normal force is equal to 1706.45 N.
Explanation:
To solve the problem, and since there is no additional information, we can safely assume that the x-axis is parallalel to the hill surface and the y-axis is perpendicular to the x-axis. Knowing that, we can calculate the components of the normal force (or weight for this case), using the following formulas:
[tex]N
x
=W∗Sin(α)=mg∗Sin(α)[/tex]
[tex]N
y
=W∗Cos(α)=mg∗Cos(α)[/tex]
Now, using the given information, we have:
[tex]mass=m=1150Kg[/tex]
[tex]a=8.70[/tex]
[tex]g=9.81 \frac{m}{ {s}^{2} } [/tex]
Calculating, we have:
[tex]N_{x}=mg*Sin(\alpha)[/tex]
[tex] \: \: \: \: \: \: \: \: \: N_{x}=1150Kg*9.81\frac{m}{s^{2}}*Sin(8.70\°)[/tex]
[tex]N
x =11281.5
s
2
Kg.m
∗Sin(8.70\°) = \\ \\ 1706.45
s
2
Kg.m
=1706.45.23N[/tex]
Hence, we have that the x-component of the normal force is equal to 1706.45 N.
Answer:
zero
Explanation:
fx=
What the name for the phenomenon of inducing voltage by changing the magnetic field around a conductor?
Electromagic
Electromagnetic Induction
Electrostatics
Van de Graaff generation
The phenomenon of inducing voltage by changing the magnetic field around a conductor will be Electromagnetic Induction. Option B is correct.
What is the Faraday law of electromagnetic induction?According to Faraday's law of electromagnetic induction, the rate of change of magnetic flux link with the coil is responsible for generating emf in the coil to result in the flow of amount of current .
So in order to increase the current, we need to increase the EMF;
so we can increase it by;
1) Increasing the number of turns
2) Increase the area of the loop
3) By moving the magnet faster
Hence, option B is correct.
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Why is the moon’s force of gravity less than that of the earth?
Why is the moon’s force of gravity less than that of the earth?
Answer:-Since the moon has a smaller mass than the earth, the moon has less gravity than the earth. Gravity is related to mass.
Larger mass = larger gravity
Smaller mass = lesser gravity
Moon has small mass, therefore less gravity.
How much heat energy is required to raise the temperature of 1 kilogram of steel by 10°C?
from
∆H=MC∆T
but M=1Kg=1000g
∆T=10°C
C=0.466J/g°C
∆H=(1000×0.466×10)Joule
=4660J
explanation
When heat energy is added to a substance, the temperature will change by a certain amount. The relationship between heat energy and temperature is different for every material, and the specific heat is a value that describes how they relate.
heat energy = (mass of substance)(specific heat)(change in temperature)
Q = mc∆T
Q = heat energy (Joules, J)
m = mass of a substance (kg)
c = specific heat (units J/kg∙K)
∆ is a symbol meaning "the change in"
∆T = change in temperature (Kelvins, K
What is the amplitude of the wave?
Answer:
1 meter for this wave
Explanation:
Amplitude is the height of the wave from the midline to the crest
Vhich type of reaction is modeled by this chemical equation?
PLi + CaCl2 - 2LICI + Ca
Answer:
Double-replacement
Explanation:
2Li + CaCl2 → 2LiCl + Ca O
D. Double-replacement
Suppose you have a scarf that appears red when you are outside on a sunny day. Will the scarf appear red if you view it under different colors of light?
Answer:
no
actually no one weres the scarf in sunny ʕ•ε•ʔ
Explanation:
The colours we see are the wavelengths that are reflected or transmitted. For example, a red shirt looks red because the dye molecules in the fabric have absorbed the wavelengths of light from
(ii) The ball has a time of flight of 3.5s before landing The green is a vertical
distance of 7.5 m above the point at which the ball was hit, as shown. The green
is about seventy metres away from where the ball is hít.
flight of ball
green
ball hit at this point
17.5m
7 Om
Deduce whether, if air resistance is ignored, the ball could land on the green
after a flight time of 3,5s.
If air resistance is ignored, the ball could land on the green after a flight time of 3.5s.
Vertical velocity of the ball
The vertical velocity of the ball is calculated as follows;
[tex]h = v_yt - \frac{1}{2} gt^2\\\\7.5 = (3.5)v_y - \frac{1}{2}(9.8)(3.5)^2\\\\ 7.5 = 3.5v_y - 60.025\\\\3.5v_y = 67.525\\\\v_y = 19.29 \ m/s[/tex]
Horizontal velocity of the ballX = Vxt
Vx = (X)/t
Vx = (70)/3.5
Vx = 20 m/s
Resultant initial velocityv = √(Vy² + Vx²)
v = √(19.29² + 20²)
v = 27.79 m/s
Angle of projectiontanθ = (Vy)/(Vx)
tanθ = (19.29)/(20)
tanθ = 0.9645
θ = 43.96⁰
check if time of flight will be equal to 3.5 s or moreThe time of flight is calculated as follows;
[tex]T = \frac{2u \times sin(\theta)}{g} \\\\T = \frac{2 \times 27.79 \times sin(43.96)}{9.8} \\\\T = 3.9 \ s[/tex]
Check if the range of ball will 70 m or moreX = VxT
X = 20 x 3.9
X = 78 m
The ball will land on green which is at 70 m after 3.5s.
Thus, if air resistance is ignored, the ball could land on the green after a flight time of 3.5s.
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what is the name of the units that we measure force in
Answer:
Newton (N)
Explanation:
Newtons are used to measure force.
An object attached to one end of a spring makes 20 vibrations in 10 seconds. Its angular frequency is: 0. 79 rad/s 1. 57 rad/s 2. 0 rad/s 6. 3 rad/s 12. 6 rad/s
Angular frequency in radian per second for 20 vibrations in 10 seconds is 12.6 rad/s
What is Angular frequency?Angular frequency is the number of vibrations in radian per second.
The total number of vibrations n is 20 and the time taken for these vibrations is 10 s
The frequency of the vibrations will be
f = 20 / 10 = 2 Hz
Angular frequency is related to the frequency as
ω = 2πf
ω=2π × 2
ω = 12.6 rad/s
Thus, the angular frequency is 12.6 rad/s.
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A uniform magnetic field b is perpendicular to the plane of a circular loop
A uniform magnetic field is perpendicular to the plane of a circular loop. The rate must the magnitude of change to induce a 10 A current in the loop.
What is uniform magnetic field?The magnetic field which doesn't change with respect to time is called the uniform magnetic field.
The resistance of the loop is related to the length of the wire as
R=ρ L/ A
Diameter of wire is 10 cm formed from wire of diameter 2.5 mm and resistivity is 1.69×10⁻⁸ Ω⋅m.
Substituting the values into the above equation, we get
R = {(1.69×10−8Ω⋅m) × π(0.10m)} / {π(2.5×10−3m)2/4}
R =1.1×10−3Ω
Current is related to emf as
i=∣ε∣/R
=∣dΦB/dt∣ / R
=(πl2/R) ∣ dB/dt ∣.
Substituting the given values from the question, we have rate of change of magnetic field
∣dB / dt∣ = πr2iR
∣dB / dt∣ = π(0.05m)2(10A)(1.1×10−3Ω)
∣dB / dt∣ =1.4T/s
Therefore, the rate must the magnitude of change to induce a 10 A current in the loop is 1.4T/s.
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Wave travelling along right with speed of 0. 5 m/s time 4 second point p
The wavelength of the wave which is travelling along right with speed of 0. 5 m/s time 4 second point is 2.
What is the speed of wave?Speed of wave is the rate by which the wave travels. It can be described as the distance cover by the crest or thrust of it per unit of time. It can be calculated with the following formula,
[tex]v=f\times\lambda[/tex]
Here, (f) is the frequency and (λ) is the wavelength.
The frequency is inverse of time. Thus, the value of frequency in time t is,
[tex]f=\dfrac{1}{t}\\f=\dfrac{1}{4}\\f=0.25[/tex]
The speed of the wave is 0.5 m/s. Put the values in the formula,
[tex]v=f\times\lambda\\0.5=0.25\times\lambda\\\lambda=\dfrac{0.5}{0.25}\\\lambda=2[/tex]
Thus, the wavelength of the wave which is travelling along right with speed of 0. 5 m/s time 4 second point is 2.
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You are still able to hear sounds coming from a room when the door is open only a tiny crack due to…?
Answer:
Sound waves are able to go throught some objects.
Explanation:
The following equation, N2 + 3 H2 —>2 NH3 ,describes a
(1) physical change
(3) mixture
(2) chemical change
(4) element
Food must often stay warm prior to being served but also not be damaged by the heating process. Which of these components of the electromagnetic spectrum would be high enough in associated energy to warm food without having ionizing impacts on the components of the food itself? Select ALL that apply.
The electromagnetic spectrum which is high enough to warm food without having ionizing impacts include:
MicrowavesInfraredWhat is Ionization?This involves an atom or a molecule gaining or losing electrons to form charged ion.
The electromagnetic spectrum wit long wavelengths will have enough energy to warm it without ionizing impacts and they are mentioned above.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
4.2 into the atmosphere
Explanation:
Carbon movement into atmosphere :
(8.3 ± 0.4) + (1.0 ± 0.5)Let's avoid the variability 8.3 + 1.09.3Carbon movement in the sinks :
(2.6 ± 0.9) + (2.5 ± 0.5)2.6 + 2.55.1Net Carbon Movement :
9.3 - 5.14.2 into the atmosphereA ________ results when the outward-directed gas pressure (created by thermal nuclear energy) is balanced in a stable relationship with inward-directed gravitational force.
When the outward-directed gas pressure (created by thermal nuclear energy) is balanced in a stable relationship with inward-directed gravitational force results in main sequence star.
What is pressure ?The pressure is the force exerted per unit area.
A main sequence star fuses hydrogen in its core and has balanced outward pressure from core nuclear fusion and gravitational forces will be pushing inward.
When the outward-directed gas pressure is balanced in a stable relationship with inward-directed gravitational force results in main sequence star.
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Can someone please answer this, ill give you brainliest Would be very appreciated.
Answer:
cohesive properties
Explanation:
The property of cohesion allows liquid water to have no tension on the surface.
Answer:
Cohesive properties
Explanation:
Cohesive properties denotes to attraction of particles on surface like sticking with each otherWater has higher cohesive properties so no surface tension
What is the benefit of cooling down after exercise?
Answer:
3 benefits of a restrict afterwards a practice Brings essence rate back off and slows respiring Muscles return back to optimum motionless distance Prevents ancestry from combining in lower limits Cool down stretches are used to weaken courage rate and respiring rates afterwards exercise. It can help cause your soul rate back off to situated rate.
Explanation:
A proton of energy 900gev collides with a stationary proton. Find the available energy ea. The rest energy of the proton is 938mev
The total energy available during the collision of the two protons is determined as 900,938 MeV.
Total energy available during the collision
Based on the principle of conservation of energy, the total energy of the two protons during the collision will be conserved.
Available energy = Er + K
Where;
Er is the rest energyK is the kinetic energyAvailable energy = 938 MeV + 900 GeV
Available energy = 938 Mev + 900 x 10³ MeV
Available energy = 938 MeV + 900,000 MeV
Available energy = 900,938 MeV
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Which object represents a negatively charged particle? which object represents a positively charged molecule? which object represents an uncharged molecule? which object will not move when in an electric field?
The answers to your questions are as written below:
The objects that represents a negatively charged particle is : Image B The object that represents a positively charged molecule is : Image A The object that represents an uncharged molecule is : Image C The object the will not move when in an electric fied is : Image C Different types of charges moleculesA negatively charged molecule move inwards when placed in an electric field while positively charged molecule placed in a electric field will move outwards the electric field.
A neutral/uncharged molecule will remains still when placd in an elctric field due to the absence of charges.
Hence we can concude that the answers to your questions are as listed above.
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attached below is the missing image
hydraulic lift has an input cylinder 4cm indiameter and an out put cylinder 16cm in
diameter.find the force exerted by the out put pistion when aforce aforce Newton if applied to the input pistion
The force exerted by the output piston will be 20 N. The pressure exerted on the both end is equal.
What is pressure?The force applied perpendicular to the surface of an item per unit area across which that force is spread is known as pressure.
It is denoted by P. The pressure relative to the ambient pressure is known as gauge pressure.
The area of the input cylinder is found as;
A₁=πR₁²
A₁=π(2)²
A₂=4π
The area of the output cylinder is found as;
A₂=πR₂²
A₂=π(4)²
A₁=16π
The pressure exerted on the both end is equal ;]
P₁=P₂
F₁A₁=F₂A₂
80 ×4 π==F₂×16 π
F₂=20 N.
Hence,the force exerted by the output piston will be 20 N.
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Which statement describes one of the main principles of Dalton's atomic theory? Elements of the same atom are identical. O Atoms of the same element are different. O Elements of the same atom are different. Atoms of the same element are identical.
Dalton's atomic theory is related to the characteristics of atom. The statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.
What is Dalton's atomic theory?The Dalton's theory states that All matter is composed of extremely small particles called atoms and Atoms of a given element are identical in size, mass, and other properties. Atoms of different element are different.
Hence, the statement describes one of the main principles of Dalton's atomic theory is atoms of same element are identical.
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As a aider how do you prepare for an emergency?
Answer:
Assess the situation quickly and calmly. Safety: check whether you or the casualty are in any danger. ...
Protect yourself and them from any danger. ...
Prevent infection between you and them. ...
Comfort and reassure. ...
Assess the casualty and give first aid treatment. ...
Arrange for help if needed
Explanation:
