Answer:
Hai ví dụ như sau:
a) Vật thể chuyển động - Phương tiện di chuyển, Người đàn ông đi bộ
b) ở trạng thái nghỉ - Xe đứng, người ngồi
c) Chuyển động vì một vật đứng yên so với một vật khác - Một người đàn ông ngồi trên sân ga đứng yên so với đoàn tàu đang chuyển động, Một ô tô chuyển động ngang qua những ngôi nhà đang đứng yên
d) chuyển động thẳng - Đi bộ trên đường, chuyển động lên trên
e) chuyển động cong - Chạy trên đường tròn, đạn bắn ra từ súng
f) chuyển động tròn đều - Xe chuyển động trên đường cong, êlectron chuyển động vuông góc với từ trường đều
Explanation:
Hai ví dụ như sau:
a) Vật thể chuyển động - Phương tiện di chuyển, Người đàn ông đi bộ
b) ở trạng thái nghỉ - Xe đứng, người ngồi
c) Chuyển động vì một vật đứng yên so với một vật khác - Một người đàn ông ngồi trên sân ga đứng yên so với đoàn tàu đang chuyển động, Một ô tô chuyển động ngang qua những ngôi nhà đang đứng yên
d) chuyển động thẳng - Đi bộ trên đường, chuyển động lên trên
e) chuyển động cong - Chạy trên đường tròn, đạn bắn ra từ súng
f) chuyển động tròn đều - Xe chuyển động trên đường cong, êlectron chuyển động vuông góc với từ trường đều
2.
A charge particle is moved through a potential difference of 154.5 V and experiences a
change of electric potential energy of 4.26 x 10-8 J. What is the charge of the particle?
Answer:
2.76×10⁻¹⁰ C
Explanation:
Applying,
V = W/q................... Equation 1
Where V = Electric Potential, E = Electric potential energy, q = charge.
make q the subject of the equation
q = W/V................ Equation 2
From the question,
Given: W = 4.26×10⁻⁸ J, V = 154.5 V
Substitute these values into equation 2
q = 4.26×10⁻⁸/154.5
q = 2.76×10⁻¹⁰ C
What fraction of a wavelength of a standing wave pattern is between resonances in a closed end tube?
Answer:
[tex]25\%[/tex] of the wavelength is between resonances in a closed end tube.
Explanation:
In an one end closed tube, the fundamental resonance occurs when a node is created at the closed end and an antinode is created in the open end.
Thus, for fundamental resonance, the entire length of the tube encloses one-fourth of the wavelength of the standing wave.
The formula to calculate the percentage of the wavelength in a closed end tube is given by
[tex]f=\frac{L}{\lambda}\times100\%........................(1)[/tex]
Here, [tex]f[/tex] is the required percentage, [tex]L[/tex] is the length of the tube and [tex]\lambda[/tex] is the wavelength of the standing wave.
Substitute [tex]\frac{\lambda}{4}[/tex] for [tex]L[/tex] into equation (1) o calculate the required percentage.
[tex]f=\dfrac{\frac{\lambda}{4}}{\lambda}\times100\%\\~~~=25\%[/tex]
A hydraulic jack is used to lift a car by applying a force of 120N at the pump piston,if the area of the ram and pump piston are 100cm squared and 1m squared respectively
Complete question:
A hydraulic jack is used to lift a car by applying a force of 120N at the pump piston, if the area of the ram and pump piston are 100cm squared and 1m squared respectively. What is the weight of the car?
Answer:
the weight of the car is 1.2 N
Explanation:
Given;
applied force, F₁ = 120 N
area of the effort (pump), A₁ = 1 m²
area of the load (ram), A₂ = 100 cm² = 1 x 10⁻² m²
let the weight of the car = F₂
The applied pressure is constant and the following equations can be used to calculate the weight of the car.
[tex]P = \frac{F_1}{A_1} = \frac{F_2}{A_2} \\\\F_2 = \frac{F_1 \times A_2}{A_1} \\\\F_2 = \frac{120 \times (1\times 10^{-2})}{1} \\\\F_2 = 1.2 \ N[/tex]
Therefore, the weight of the car is 1.2 N
If 175 kJ of heat caused a chunk of ice at 0°C to melt to liquid water at 0°C, how many moles were in the ice? How many grams of ice? (Note: molar mass of ice/water is 18.02 g/mol)
Answer is 29.1 mol or 525 g
Explanation:
Which element is found in group 16 and period 5
Answer:
Po (Polonium)
Explanation:
The source of electromagnetic waves is _____.
vibrating atoms
magnetic fields
electric fields
vibrating electric charges
Answer:
D. Electric Charges
I need helpppp please
Answer:
b
Explanation:
define fundamental unit ? write its two example.
the International System of Units, the fundamental units are: The meter (symbol: m), used to measure length. The kilogram (symbol: kg), used to measure mass. The second (symbol: s), used to measure time. The ampere (symbol: A), used to measure electric current.
athlete running on a circular track of radius 5 m completes one round in 12 s. what its average speed and average displacement?
Average speed = total distance/time
That's 2.62 m/s .
You don't want average displacement. You want average velocity.
That's (displacement)/(time).
That's zero, because displacement = 0.
NEED HELP
A 0.558 kg block of copper at 117°C comes in contact with a 1.11 kg block of aluminum at 15.8°C. What is their equilibrium temperature?
there it is fella tried on ma own consciousness
Answer:
33.8
Explanation:
(Acellus)
.
A sample of an ideal gas is contained at initial volume 34 L, temperature 450 K, and pressure 7.7 × 104 Pa. It then is allowed to expand to a volume of 40 L. To calculate the work involved in the expansion, which additional information, if any, must be known about the gas? Assume that known information includes the values of physical constants, such as the ideal-gas constant R.
A.the final pressure of the gas
B.The path of the change from initial to final conditions
C. the final temperature of the gas
Answer:
it have to be a
Explanation:
A human hair has a thickness of about 70 micrometers. How many meters is
this?
A. 70 x 10-2 m
B. 70 x 10-6 m
C. 70 x 10-3 m
D. 70 x 10-ºm
Answer:
the answer is B. 70 x 10-6 m
Explanation:
i'm doing the test rn
When converting from micrometers to meters, you have to divide the value by 1,000,000
= 70/1000000
= 7 ×10⁻⁵
Hence the thickness of the human hair is in meters is 7×10⁻⁵ m
Please see the link below for more information
https://brainly.com/question/8648951?referrer=searchResults
Electromagnetic radiation that is used by humans and animals to see is called the visible light spectrum.
Group of answer choices
True
False
Answer:
True Hope it's helpful. plz mark me as brainlist.If the angle of a light ray in air is 25∘ and it enters a substance with a refracted angle of 13∘, what is the index of refraction of the substance?
A). 0.65
B). 0.53
C). 1.92
D). 1.88
Answer:
Explanation:
The formula for this is
[tex]n_1sin\theta_1=n_2sin\theta_2[/tex] where the index of refraction of air is 1.00. Filling in and solving for n2:
1.00sin(25) = n₂sin(13) and
1.00(.423) = n₂(.225) and
[tex]\frac{1.00(.423)}{.225}=n_2[/tex] so
[tex]n_2=1.88[/tex], choice D.
I need help QUICK!! 20 points
Which of the following is/are formed as gravity pulls increasing amounts of dust and debris in a nebula together?
a. the solar wind
b. meteors
c. planetesimals
d. meteorites
Q2. A cube of side 2 cm has a density of 6 g cm. What is the mass of the cube?
[tex]given \: the \: length \: of \: one \: side \: of \: a \: cube \: \\ = 2cm \\ so \: we \: know \: the \: volume \: of \: a \: cube \: = {side}^{3} \\ so \: the \: volume \: of \: the \: cube \: here \: = {2}^{3} {cm}^{3} = \: 8 {cm}^{3} \\ we \: know \: density \: of \: a \: substance \: = \: \frac{mass}{volume} \\so \: mass \: = density \times volume \\ density = 6 \frac{g}{ {cm}^{3} } \\ volume \: = 8 {cm}^{3} \\ so \: \: mass \: = (6 \times 8)( {cm}^{3} \times \frac{g}{ {cm}^{3} }) \\ 48gram \: (ans) [/tex]
HOPE IT HELPS
There are two sets of resistors joined in series in a circuit. Set 1 has two resistors of 10Ω and 40Ω in parallel combination. Set 2 has three resistors of 20 Ω, 30 Ω and 60 Ω in parallel combination. A potential difference of 12 V is applied across the combination.
[tex]\huge\boxed{\fcolorbox{black}{red}{ QUESTION}}[/tex]
There are two sets of resistors joined in series in a circuit. Set 1 has two resistors of 10Ω and 40Ω in parallel combination. Set 2 has three resistors of 20 Ω, 30 Ω and 60 Ω in parallel combination. A potential difference of 12 V is applied across the combination.
[tex] \orange{\underline{\huge{\bold{\textit{\green{\bf{GIVEN}}}}}}}[/tex]
Two set of Parallel resistors
Contains two resistors of --> 10Ω and 40Ω
Contains three resistors of --> 20 Ω, 30 Ω and 60Ω
Potential Difference Of 12 V
[tex]{\bold{\orange {To \: Find }}}[/tex]
Draw a circuit diagram to represent this arrangement Calculate
(a) the total resistance and
(b) the total current flowing in the circuit.
[tex] \huge\mathbb{\red A \pink{N}\purple{S} \blue{W} \orange{ER}}[/tex]
FOR DIAGRAM REFER ATTACHMENT!
[tex]{\bold{\green{\star{\red {Part \: 1:- The \: Total \: Resistance }}}}}[/tex]
First we calculate the total resistance of each parallel combination:-
FIRST SET Contains two resistors of 10Ω and 40Ω
so total resistance-->
[tex] \frac{1}{Rs1} = \frac{1}{R1} + \frac{1}{R2} \\ \\ \frac{1}{Rs1} = \frac{R1 + R2}{R1R2} \\ \\ \frac{1}{Rs1} = \frac{10 + 40}{400} \\ \\ \frac{1}{Rs1} = \frac{50}{400} \\ \\ \frac{1}{Rs1} = \frac{1}{8} \\ \\ Rs1 = 8 Ω[/tex]
SECOND SET Contains three resistors of 20 Ω, 30 Ω and 60Ω
so total resistance-->
[tex] \frac{1}{Rs2} = \frac{1}{R1} + \frac{1}{R2} + \frac{1}{R3} \\ \\ \frac{1}{Rs2} = \frac{R1 + R2 +R3}{R1R2R3} \\ \\ \frac{1}{Rs2} = \frac{3+ 2 + 1}{60} \\ \\ \frac{1}{Rs2} = \frac{6}{60} \\ \\ \frac{1}{Rs2} = \frac{1}{10} \\ \\ Rs2 = 10Ω[/tex]
Now by having Total Resistance of Set one and set two we can add them by series formula.
[tex]R = Rs1 + Rs2 \\ R = 8 + 10 = 18 \: Ω[/tex]
[tex]{\bold{\green{\star{\orange{Part \: 2:- The \: Total \: Current \: Flowing \: In \: The \: Circuit. }}}}}[/tex]
Total Resistance of the circuit = 18 Ω
Potential Difference Of the circuit = 12 V
So Total current-->
[tex] V = IR \\ 12 = 18 \times I \\ \\ I = 0.66 \: A[/tex]
entropy is the amount of heat a system releases. true or false?
Answer:
The answer to this is FALSE.
Can someone one help me please !!!
Answer:
Current in the circuit(I) = 0.5 ampere
Explanation:
Given:
Number of resistors = 2 (10 ohm each)
Series of resistors
EMF = 10 volt
Find:
Current in the circuit(I)
Computation:
Total resistance in series = R1 + R2
Total resistance in series = 10 + 10
Total resistance in series = 20 ohm
Current in the circuit(I) = EMF / Total resistance in series
Current in the circuit(I) = 10 / 20
Current in the circuit(I) = 0.5 ampere
What is the net force on the object represented by the FBD below?
Answer:
Explanation:
35 up 35 down cancel out.
25 forward minus 10 pulling back, so:
25-10
= 15N Right
If each metal is hit with light at a minimum wavelength, can I vary the intensity of the light to start emitting electrons?
It is true that the metal will begin to emit electrons at varied speeds depending on the intensity of the light when it is struck at a minimal wavelength.
What is meant by wavelength?When a waveform signal is propagated in space or over a wire, the wavelength is the separation between two identical locations (adjacent crests) in the adjacent cycles.
If you are employing light with a high enough frequency, the number of electrons ejected grows as the light source's brightness rises.
The velocity of the expelled electrons increases as the frequency is raised above the threshold.
Thus, the metal will begin to emit electrons at varied speeds depending on the intensity of the light when it is struck at a minimal wavelength.
To learn more about Wavelength, refer to the below link:
https://brainly.com/question/1263539
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power of a crane is 25000 watt calculate the time required by it to lift a load of 6000 kg up tp the height of 20 m
Numerical: A capacitor of 200 picofarad is charged to a potential difference of 100 volts. It's plates are then connected parallel to another capacitor them potential difference in this combination fall to 60 volts. What is the capacitance of second capacitor?
(Working of this solution)
Answer:
The capacitance of the other capacitor is 1333.3 pF.
Explanation:
C' = 200 pF, V' = 100 V, C'' , V''= 0
Common potential, V = 60 V
Use the formula of the common potential
[tex]V = \frac{C' V' + C'' + V''}{C'+ C''}\\\\60 = \frac{200\times 100 + 0}{200 + C''}\\\\1200+ 6 C''= 2000\\\\C'' = 1333.3 pF[/tex]
. What is the mass of an object if it is pulled by a 5 Newton force and it accelerates at a rate of 20 m/s/s?
Please help ASAP
F = ma
so, we can write it as;
= 5 = m × 20
= 5/20 = m
= 1/4 = m
= 0.25 kg = m
Which symbol represents a type of radiation that has the same mass as an
electron and a positive charge?
Answer:
the answer is D
as an electron is composed of positive charges
Answer:
D.+1°e symbol represents a type of radiation that has the same mass as an electron and a positive charge.
Explanation:
it is 100% correct!
The displacement ‘s' of a point moving in a straight line is given by: s = 6t^2 + 5t – 5, ‘s' being in cm and ‘t' in s. The initial velocity of the particle is:
Answer:
the initial velocity of the particle is 5 cm/s
Explanation:
Given initial displacement as, s = 6t² + 5t - 5
s is measured in "cm"
t is measured in "seconds"
Velocity is the rate of change of displacement with time. Expressed as follows;
[tex]v = \frac{ds}{dt} = 12t + 5[/tex]
for initial velocity, time (t) = 0
v = 12(0) + 5
v = 5 cm/s
Therefore, the initial velocity of the particle is 5 cm/s
What is cultural discontinuity?
Answer:
Disconnections and discrepancies
between school-based norms and values and those of
some pupils, especially those from
nondominant cultures, are referred to
as cultural discontinuity.
☆-----------------------------☆
☆Hope it helps...
☆Have a great day!!!
describe one example of light being refracted in the living room
Answer:
television
Explanation:
a television refracts light (the light bounces off of the screen
Answer:
Suppose you have a glass slab as a paper weight, if you keep it on the paper, dont you see something strange? The paper becomes elevated in the glase slab. Everyone sees a waterbottle or glass everyday, while seeing through it, does everything seem normal? Nope. That's refraction.
Explanation:
You must have seen a prism, right? It makes light split into the visible electromagnetic spectrum.
What type of glass absorbs light and does not allow light to pass through it?
reflective
transparent
opaque
refractive
opaque glass does not allow light to pass through it.
A person ran westward for 1600 meters in 8 minutes. What was their speed?
Answer:
3.33 m/s
Explanation:
1600 divided by 8 comes out to 200, so supposing we're measuring the speed in terms of Meters Per Second, we would need to divide 200 by 60 to take account of the individual seconds as opposed to simply 200 meters per minute.