vf²=vi²+2ad
12²=0+2.a.10
a = 7.2 m/s²
W = m.g
m = W/g = 98/9.8 = 10 kg
∑F=m.a
W-fr=m.a
fr(air friction)=W - m.a
fr = 98 - 10 x 7.2
fr = 98 - 72
fr = 26 N
what is Newton's first law
Answer:
it is inertia
Explanation:
Answer:
Newton's first law: the law of inertia
Explanation:
hello humans ~
[tex] \\ [/tex]
explain how eyes get used to darkness after some time?
It is all about the dilation of pupils. When darkness falls, your pupils enlarge, whereas in daylight, your pupils shrink.
I am joyous to assist you at any time.
Charge q1 = 7. 5 nc is located at the coordinate system origin, while charge q2 = 1. 5 nc is located at (a, 0), where a = 1. 1 m. The point p has coordinates (a, b), where b = 2. 6 m
The electrical field along the horizontal axis is 3.36N/C and the 8.11N/C along the vertical axis
Data;
q1 = 7.5nCq2 = 1.5nCa = 1.1mb = 2.6mElectrical Field ForceThe electrical field force is given as
[tex]E = \frac{kQ}{r^2}[/tex]
The distance apart will be
[tex]r = \sqrt{1.1^2 + 2.6^2} = 2.8m[/tex]
Let's find E1 and E2
E1 will be
[tex]E_1 = \frac{-9*10^9 * 7.5*10^-^9}{2.8^2} = -8.61N/C[/tex]
E2 will be
[tex]E_2 = \frac{-9*10^9*1.5*10^-^9}{2.8^2} = -1.72N/C[/tex]
Let's find the angle between the charges
[tex]tan\theta = \frac{2.6}{1.1} \\\theta = 67.04^0[/tex]
The value E12
[tex]E_1_2 = |E|cos\theta = 8.61(cos67.04) = 3.36N/C[/tex]
The value of E21 = 0
The value of electrical field along the horizontal axis
[tex]E_x = 3.36 N/c[/tex]
The value along the vertical axis
[tex]E_1_y = -|E_1|sin \theta = -7.93 N/C\\E_2_y = E_2 sin 90^0 = -1.72N/C\\E_y = \sqrt{7.93^2 + 1.72^2}= 8.11N/C[/tex]
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Which wave interaction results in a change in the direction of the wave as it passes through one medium to another medium? absorption diffraction reflection refraction.
Answer: Reflection
Explanation:
The incident wave is the wave coming from the source. When an incident wave hits an interface, it splits into two parts. There is the reflected wave and the transmitted wave. Assuming that the incident wave hits the interface directly, and not at an angle, the reflected wave will reflect back to the source, and the transmitted wave will pass through the interface and continue on its path. The reflected wave will be "upside down" as it gets sent back.
Answer:refraction
Explanation:
right on edge 2023
The force that opposes the motion of an object is called:.
Answer:
The Force of Friction!
Explanation:
I hope I could help you, Brainliest please!
A motor bike is sitting at the start line. It reaches a speed of 90m/s in 10 seconds. Calculate its acceleration.
Answer:
9m/s^2
Explanation:
a= dv/dt, 90m/s-0m/s/10s-0s=9m/s^2
Imagine that martians launch a rocket toward the Earth at a great speed. While the rocket is traveling toward us, it will appear _____ than it actually is.
A. Larger
B. Darker
C. More blue
D. More red
Answer:
The rocket would appear more blue than it actually is.
Explanation:
Assume that the rocket was initially at a distance of [tex]d[/tex] away from the Earth. Let [tex]c[/tex] denote the speed of light. It would take a time of [tex](d / c)[/tex] before the first crest of the light (an electromagnetic wave) from the rocket arrive at the Earth.
If [tex]T[/tex] denote the period of this EM wave. The next crest of this wave would leave the rocket at a time of exactly [tex]T\![/tex] after the previous crest.
Let [tex]v[/tex] denote the speed at which the rocket travels toward the Earth. In that time period of [tex]T[/tex], the rocket would have moved towards the earth by [tex]v\, T[/tex]. Thus, the next crest of this wave would need to cover a distance of only [tex](d - v\, T)[/tex] (as opposed to [tex]d[/tex], the distance required for the first crest) before reaching the Earth. Thus, this subsequent crest would need to travel for a distance of only [tex](d - v\, T) / c[/tex] before reaching the earth.
Let [tex]t = 0[/tex] refers to the time when the first crest of the light from the rocket leaves the rocket. The next crest would leave the rocket at time [tex]t = T[/tex].
The first crest would arrive at the earth at [tex]t = (d / c)[/tex].The next crest would arrive at the earth at [tex]t = T + ((d - v\, T) / c)[/tex].Thus, it would appear to an observer on the earth that the period of the light from the rocket was:
[tex]\begin{aligned}& \left(T + \frac{d - v\, T}{c}\right) - \left(\frac{d}{c}\right) \\ =\; & T - \frac{v\, T}{c}\end{aligned}[/tex].
In other words, observers on the Earth would find the period of this wave shorter than it actually is at the rocket ([tex]T - (v\, T) / c[/tex] as opposed to [tex]T[/tex].)
The frequency of a wave is inversely proportional to the period of that wave. Thus, observers on the Earth would find the frequency of the wave from the rocket higher than the frequency of this wave at the rocket.
EM waves of higher frequency (higher energy) appear more blue than ones of lower frequency. Therefore, this rocket would appear more blue to observers on the Earth than it actually is.
fill in the blanks
An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a ---------- gradient. If an object slows down, its graph will have a --------- gradient.
Answer:
positive gradient
Negative gradient
Explanation:
An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a positive gradient. If an object slows down, its graph will have a Negative gradient.
A straight line sloping upward to the right represents a positive gradient while a straight line sloping downward to the right represents negative gradient.
An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a positive gradient. If an object slows down, its graph will have a negative gradient.
An object's acceleration describes its change in speed.
If the speed of an object increases with time, its graph will have a positive gradient.
If an object slows down, its graph will have a negative gradient.
The gradient of a graph is the slope of the line. In the case of a speed-time graph, the gradient of the graph represents the acceleration of the object. If the gradient of the graph is positive, the object is accelerating. If the gradient of the graph is negative, the object is decelerating.
When an object's speed increases, the graph of its speed-time will have a positive gradient. This is because the object is getting faster over time, which means that its acceleration is positive.
When an object's speed decreases, the graph of its speed-time will have a negative gradient. This is because the object is getting slower over time, which means that its acceleration is negative.
Hence, An object's acceleration describes its change in speed. If the speed of an object increases with time, its graph will have a positive gradient. If an object slows down, its graph will have a negative gradient.
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a student pushes a shopping cart filled with groceries. the cart has a mass car of 12 kilograms (kg). The student pushes the cart with a force of 15 newtons (N). Assuming the ground is frictionless, how fast will the cart accelerate until the student stops applying force?
Answer:
the cart will have an acceleration of 1,25 m.s‐²
Different Betweens in Self Induced emf and Mutual Induced emf ~
Thank uh☃️
Answer:
brain cells that are in your brain
Explanation:
it has something to do with brain cells
whats carbond6y12 explain!!
Answer: More info please
Explanation:
A 5 kg rock is lifted 3 m above the ground. What is the rock's GPE now?
A. 15 J
B. 15,000 J
C. 1,500J
D. 150 J
describe ohm law with examples
Here is your Answer:-
Ohm's Law
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points. Introducing the constant of proportionality, the resistance, one arrives at the usual mathematical equation that describes this relationship: I=V/R, where I is the current through the conductor in units of amperes, V is the voltage measured across the conductor in units of volts, and R is the resistance of the conductor in units of ohms.
Conventional Domestic Fans.
Electric Heaters. The electric heaters are the common appliances used in winters throughout the world.
Electric Kettles and Irons. The electric kettle and irons have a lot of resistors in them.
Design of Electric Devices.
What factors do NOT affect friction between two objects? Explain how you know this.
The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces
(ii) roughness of the surface
(iii) deformation of bodies.
<3
The magnitude of the electric field between two parallel charged plates is 200. An electron moves to the negative plate 5. 0 cm away. Two horizontal parallel plates have equally spaced vectors going from the top plate to the bottom plate labeled E and the plates are spaced a distance d apart. There is a negatively charged sphere is near the positively charged plate and a second is directly below and near the negatively charged plate. The two charged particles are connected by a dashed line vector point from the top to the bottom one. Find the electric potential difference and the work. Recall the charge of an electron is 1. 602 × 10–19 C. ΔV = V Round work to one decimal. W = × 10–18 J.
The potential difference between the two ends of the circuit is the electric potential difference. The electric potential difference and the work will be 10V and 1.6 x 10^-18 J respectively.
What is an electric field?An electric field is an electric property that is connected with any location in space where a charge exists in any form. The electric force per unit charge is another term for an electric field.
The given data in the problem is given by;
E is the electric field = (200 N/C)
d is the distance = 5.0 cm.=0.05 m
Q is the charge of electrons= 1.602 x 10^-19 C
The formula for electric potential is given by;
[tex]\rm V=Ed[/tex]
[tex]\rm V=Ed \\\\ \rm V=200 \times 0.05 \\\\ \rm V= 10 \frac{Nm}{C} = 10 \frac{J}{C} = 10 V.[/tex]
The work is defined as the product of the potential difference and charge of an electron.
[tex]\rm W= 10 \times 1.602 x 10^{-19} \\\\\ \rm W= 1.6 x 10^{-18 }J[/tex]
Hence the electric potential difference and the work will be 10V and 1.6 x 10^-18 J respectively.
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first part is 10 second part is 1.6
A jet is flying at a velocity of 30m/s. It speeds up to 150m/s in 40s.
Calculate its acceleration.
Answer:
acceleration= Final velocity - initial velocity/time taken
or u can put the formula by their symbols
a= V-u/t
a=150m/s - 30m/s= 120
120/40s= 3s
so the answer is 3s.
Sirius Satellite Radio provides continuous radio broadcasts across the United States. Sirius does not use geostationary satellite(s). Explain why you think Sirius consists of one satellite or a constellation.
Sirius represented a satellite constellation operated by the Nordic Satellite AB (NSAB). It was used by Nordic countries.
What was Sirius?Sirius was a satellite constellation operated by the SES SIRIUS AB (or former Nordic Satellite AB) created by Sweden and Norway governments.
Sirius constellation provided the Nordic countries with different types of communications outcomes (for example, for tv issues).
This satellite constellation composed of Sirius satellites was the only one to operate in the Tundra orbit (5.0° East, geostationary orbit).
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What’s More
Activity 1. Strength of IMFA and Physical Properties of
Covalent Compounds
For each pair of molecules, identify the one with the higher boiling point (BP), melting
point (MP), viscosity (V), surface tension (ST) and vapor pressure (VP). Briefly explain
your choice.
What is the acceleration of
a 6 kg object being pulled
with a force of 12 N?
Answer:
2 m/s^2
Explanation:
Use Newton's 2nd Law of motion:
F = ma
12N = (6kg)a
a = 12/6
a = 2 m/s^2
someone please answer this, ill give you brainliest and your getting 100 points.
Answer:
B
Explanation:
Here .
B is denoted to asthenosphere
E is Mantal section which consists of semifluid magma or lava .Describe the key features of the national grid, explaining why electricity is transmitted in this way.
The National Grid network is made of high-voltage power lines, gas pipelines, interconnectors, and storage facilities that together enable the distribution of electricity. The grid ensures that all areas of Said country have power/gas/oil products. this also allows more efficient power generators like nuclear plants to contribute more to the power grid than just where they are located.
When floating a ping-pong ball with a hairdryer, which two forces are balanced?
Force pushing up:
Force pulling down:
good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.
Answer:
The gases which are very good at absorbing long wave photons of infrared gas.
Explanation:
These absorption is called green house effectIt is the main reason behind global warmingVr1 = _______volts
O 30.
O 160.
O 24.
O 6.0
Answer:
Explanation:
Potential drop across R1, VR1
= Supply Voltage
= 24V
Well look at the diagram
Current passing refered to II is constantWe know
according to ohms law
[tex]\\ \rm\Rrightarrow \dfrac{V}{I}=R[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{V}{R}=I[/tex]
As I is constantV remains constantOption C is correct
According to our present theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system?.
Answer:
According to our present theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system? Because only metal and rock could condense in the inner solar system, while ice also condensed in the outer solar system.
Explanation:
rearrange the equation d=vt-1/2at^2 to find v
Explanation:
This is the formula for the change in distance (δx) of an object moving with constant acceleration (a) and initial velocity (v), one of the standard Equations of motion. To solve for t first rearrange
12at2+vt−δx=0
then apply the formula for solving a Quadratic equation if our equation is At2+Bt+C=0 then the solution is
t=−B±B2−4AC√2A,
here A=12a, B=v, C=−δx so plugging these in the formula gives
t=−v±✓v2−4(12a)(−δx)√2(12a) (Apply quandriatic equation)
simplifying
t=−v±v2+2aδx√a.
Note how there are two possible solutions one corresponding to the + and one to the -. Sometimes one of these will give a negative time, so you may want to eliminate that. Indeed if δx>0, v>0 and a>0 we only want the positive solution. In other cases you may want to consider both solutions, for instance if we thow a ball up in the air the initial velocity is positive and the acceleration is negative, it will pass a fixed height above your head twice, once on the way up and once on the way down.
an object moving at 10 km/h has a kinetic energy of 10 J. what is the kinetic energy of the same object if it is moving at 20 km/h
KE = 1/2 mv²
v = 10 km/h = 2.78 m/s
v = 20 km/h = 5.56 m/s
10 = 1/2 m . 2.78²
m = 2.59 kg
KE = 1/2 x 2.59 x 5.56²
KE = 40.03 J
What is the unit of measurement used for Electric Potential difference?
Answer:
e. V
Explanation:
Electric potential is the amount of work needed to move a unit charge from a reference point to a specific point against an electric field.
In the SI, the units are Volts denoted by the letter V, in honor of Alessandro Volta
Option E is the correct answer
differentiate between loadstone and bar magnet
What happens to the period of the motion when the spring constant increases? Does it increase, decrease, or stay the same?
Answer:
The answer would be Increase becaause the springs constantmotion is increasing.
Explanation: