Answer:
The de-Broglie wavelength of the nitrogen molecule is 0.0272 nm
Explanation:
The mass, m, of the nitrogen molecule, N₂ = 14.0076u = 28.0152 × 1.66 × 10⁻²⁷ kg
[tex]v_{rms}[/tex] of N₂ = 523 m/s
The de-Broglie wavelength is given as follows;
[tex]de-Broglie \, wavelength = \dfrac{h}{m\times v_{rms}}[/tex]
Where:
h = Planck's constant = 6.62607004 × 10⁻³⁴ m²·kg/s
Plugging in the values, we have;
[tex]de-Broglie \, wavelength = \dfrac{6.62607004 \times 10^{-34}}{28.0152 \times 1.66 \times 10^{-27}\times 523} = 2.72\times 10^{-11} \, m[/tex]
Hence, the de-Broglie wavelength of the nitrogen molecule = 0.0272 nm.
A vector points 12.0 units along the x-axis, and 9.00 units along the y-axis. Find the direction of the vector
The resultant points somewhere between the positive x and y axes.
The angle it makes with the x-axis has a tangent of (9/12) = 0.75 .
That angle is 36.9°, rounded to the nearest tenth of a degree.
So the resultant vector points up and to the right, 36.9° above the x-axis.
Define Newton's third law:
A) states that forces=m Xa
B)states that all forces occur in pairs
C)states that forces keep moving until acted upon by unbalanced force
D)states that gravity affects all objects
Help please!!
Answer:
the answer is B
Explanation:
the law states that for every action there is an equal and opposite reaction. action and reaction forces always act on two two different bodies and therefore THEY ALWAYS EXIST IN PAIRS.
The acceleration due to gravity on the Moon is less than the acceleration due to gravity on the Earth. Which of the following is true about the mass and weight of an astronaut on the Moon's surface, compared to Earth?
(A) Mass is less, weight is the same.
(B) Mass is the same, weight is less.
(C) Both mass and weight are less.
(D) Both mass and weight are the same.
(E) Mass is more, weight is less.
Answer:
(B) Mass is the same, weight is less.
Explanation:
Just took test
Why can a liquid take the shape of the bottom of its container?
Answer:
Liquids take on the shape of their container because they contain particles that can slide past each other. Particles in a solid,
Explanation:
Answer: Liquids take on the shape of their container because they contain particles that can slide past each other.
Mercury has a mass of 3.3 e 23 kg and a radius of 2.44 e 6 m. Find Mercury's
gravitational field strength. Show your work (formula, rearrangement, work, answer,
unit, sig dig) (4)
12. Venus has a mass of 4.87 e 24 kg and a radius of 6.05 e 6 m. The gravitational field strength at the surface of Venus is what? m/s2
13. A small Styrofoam ball has a 2.26 nC charge (2.26 x 10°C). Find the electric field strength
5.00 cm (0.0500 m) from the ball. Show your work complete with formula, work, unit and
sig digs) (4)
Answer:
11.) g = 3.695 m/s^2
12.) g = 8.879 m/s^2
13.) E = 8127 N/C
Explanation:
11.) Given that the
Mercury mass M = 3.3 × 10^23kg
Radius r = 2.44 ×10^6 m
Gravitational constant G = 6.67408 × 10^-11 m3kg-1 s^-2
Gravitational field strength g can be calculated by using the formula below
g = GM/r^2
Substitutes all the parameters into the formula
g = (6.67408 × 10^-11 × 3.3 × 10^23)/(2.44×10^6)^2
g = 2.2×10^13/5.954×10^12
g = 3.695 m/s^2
12.) Given that the
Venus mass M = 4.87×10^24kg
Radius r = 6.05 × 10^6 m
Using the same formula for gravitational field strength g
g = GM/R2
Substitute all the parameters into the formula
g = (6.67408 × 10^-11 × 4.87×10^24)/(6.05×10^6)^2
g = 3.25×10^14/3.66×10^13
g = 8.879 m/s^2
13.) Given that the
Charge = 2.26 nC = 2.26×10^-9
Distance d = 0.05m
Electric field strength E can be calculated by using the formula below
E = Kq/d^2
Where
K = electrostatic constant 8.99 × 10^9 Nm2/C2
Substitutes all the parameters into the formula
E = (8.99 × 10^9 × 2.26×10^-9)/0.05^2
E = 20.3174/2.5×10^-3
E = 8126.96 N/C
If the box moves at a constant velocity, what do you know about the forces acting on the object?
A)The forces are balanced.
B)The forces are unbalanced.
C)The forces are in outerspace
D)The box has friction
When waves travel through water, why do the moving water particles continue to return to their starting position?
OA.
Waves transfer matter, but not energy.
Waves transfer both matter and energy.
OC.
Waves transfer energy, but not matter.
OD.
Waves don't transfer matter or energy.
Answer:
Waves transfer energy, not matter
Explanation:
Which of the following is an example of a visual aid? A. a poster B. a pair of glasses C. a set of note cards D. a copy of a written report
Answer:
a pair of glasses
of course
The process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions is called __________.
A. empiricism
B. deductive reasoning
C. scientific method
D. inductive reasoning
Answer:
Deductive reasoning
Explanation:
deductive reasoning
the process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions about it
HELP PLEASE GIVING 30 POINTS AND BRAINLIEST DUE VERY SOON!!
Answer:
3 is your anwser
Explanation:
What force is required to give an object with mass 2000 kg an acceleration of
3.5 m/s2?
A. 571 N
B. 7000N
C. 10,500 N
D. 2535 N
Answer:
B
Explanation:
7,000N because the formula for finding force is F=MA (2000x3.5)N=7000N
What would a scientist most likely do to demonstrate the effects of a tsunami? (2 points) construct tsunami models make underwater plates move create actual underwater earthquakes take underwater photographs during a tsunami
Answer:
a - construct tsunami models
Explanation:
scientists cant effect on earthquakes directly, so its not 2 or 3
for 4 it wont help that much to study waves, so its better for them to make model of tsunami waves
the skeletal system serves all the following functions except
Answer:
The major functions of the bones are body support, facilitation of movement, protection of internal organs, storage of minerals and fat, and hematopoiesis. Together, the muscular system and skeletal system are known as the musculoskeletal system.
your question seems incomplete. Kindly give the full question so that it helps :)
Answer:
D.
producing ligaments and tendons
Explanation:
Help needed.
(1) A small object carrying a charge of
[tex] - 5 \times {10}^{ - 9} \: c[/tex]
experiences a downward force of 10 Newton when placed at a certain point in an electric field
What is the electric intensity at that point.
2. Determine the electric potential due to a charge of
[tex]12 \times {10}^{ - 9} c[/tex]
at a point 6 cm from the charge.
3. A series arrangement of three capacitors of value at 8micro Farahds, 12 micro Farahds and 24 micro Farahds is connected in series with a 90—V battery
(a) Draw and open circuit diagram for this arrangement (b). Calculate the effective capacitance in the circuit
(c) On closed circuit calculate the charge on each capacitor when fully charged
(d) Determine the PD across the 8 micro Farahds capacitors.
Answer:
1. -2×10 ^-9
2. 1800v
3 (ii) 4micro Farhad
(iii) V = 3.60 ×10²
(Iv) 45v
Explanation:
I hope it helps
Which of the answers shows three examples of a physical change
Giotto used foreshortening in order to:
O A. enhance the importance of his subjects.
O B. make his figures look more realistic.
O C. combine linear and aerial perspectives.
O D. guide the eye of the viewer.
SUBMIT
Answer:
I think B is the answer.
A machine with a 5-N input force and a 25-N output force has a mechanical advantage of (I point)
02
05.
O20.
O125
Answer:
020
Explanation:
Which of the following planets helped astronomers locate another planet?
Group of answer choices
Mercury
Uranus
Saturn
Pluto
Answer: Pluto,Mercury
Explanation:
Which of the following is the best description of the term resultant
displacement?
A. The scalar that joins all the points along the path.
B. The average of all the displacement vectors.
C. The total distance traveled.
O D. The shortest distance from the beginning point to the end point.
Answer:
D
Explanation:
Displacement refers to the shortest, or straight-line path from one point to another. It is a vector, thus A is incorrect. It is not the average, but rather the sum of all displacement vectors, so B is incorrect. It is not the distance traveled, as some paths have longer distances than others, while leading to the same destination, hence same displacement. (i.e. running around in circles yields positive distance traveled but zero displacement.)
Answer:
Explanation: D
Displacement is a vector. It has direction and it has magnitude. But we are asked for the resultant displacement. You have to use pythagorean theorem. This makes our answer always positive. That essentially means distance, since you did just do the distance formula.
A is wrong because that tells you perimeter
B is wrong because that tells you the midpoint
C is wrong because displacement and distance are two different things. We dont want the distance of the two vectors
D is correct, this perfectly explains the distance formula
A spherical mirror and a thin spherical lens have each a focal length of +10cm , the mirror and the lens are likely to be
Answer: Concave mirror and convex lens
Explanation: A spherical mirror and a thin spherical lens have each a focal length of +10cm, this means that distance of any object from the mirror is +10 metres.
While for the lens, the distance of any object to the other side of the lens is +10 metres. Therefore, the mirror is concave mirror and the lens is a convex lens.
A wave is traveling from one medium to another.If the wave is partially transmitted an partially reflected from the boundary,what will happen to the amplitude of the reflected wave?
Answer: the answer is C
Explanation:
Which one of the following is not equivalent to 2.50 miles?
(1.00 mi = 1.61 km = 5280 ft, 1.00 yd = 3.00 ft = 12.0 in.)
(A) 1.32 x 104 ft
(B) 1.58 x 105 in
(C) 4.02 x 103 km
(D) 4.40 x 103 yd
(E) 4.02 x 105 cm
Answer:
Choice C is not equivalent to 2.50 miles.
Explanation:
The given data is now converted into feet, inches, kilometers, yards and centimeters:
mi - ft
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)[/tex]
[tex]x = 13200\,ft[/tex]
[tex]x = 1.320\times 10^{4}\,ft[/tex] (Choice A)
mi - in
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi} \right)\cdot \left(12\,\frac{in}{ft} \right)[/tex]
[tex]x = 158400\,in[/tex]
[tex]x = 1.584\times 10^{5}[/tex] (Choice B)
mi - km
[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)[/tex]
[tex]x = 4.025\,km[/tex] (Different from Choice C)
mi - yd
[tex]x = (2.50\,mi)\cdot \left(5280\,\frac{ft}{mi}\right) \cdot \left(\frac{1}{3}\,\frac{yd}{ft} \right)[/tex]
[tex]x = 4400\,yd[/tex]
[tex]x = 4.40\times 10^{3}\,yd[/tex] (Choice D)
mi - cm
[tex]x = (2.50\,mi)\cdot \left(1.61\,\frac{km}{mi} \right)\cdot \left(100000\,\frac{cm}{km}\right)[/tex]
[tex]x = 402500\,cm[/tex]
[tex]x = 4.025\times 10^{5}\,cm[/tex] (Choice E)
Choice C is not equivalent to 2.50 miles.
Can anyone help me with this question? ASAP
15 points
Explanation:
PRIMERO ENCUENTRAS LA COMPONENTE x
x = 5.9 m(cos62°) + 7.8 m(cos 29°) = 9.6 m
AHORA LA COMPONENTE y
y = 5.9 m(sen 62°) - 7.8 m(sen 29°) = 1.4 m
PARA ENCONTRAR DESPLAZAMIENTO:
R = [tex]\sqrt{(9.6 m)^{2} + (1.4 m)^{2}}[/tex] = 9.7 m
Which object would have the most kinetic energy?
O A. An elephant sitting at the top of a cliff
B. A sloth hanging from a tall tree
C. A mouse running at 11 km/h
D. A zebra running at 10 km/h
Answer:
D
Explanation:
Answer:
It is D
Explanation:
Because kinetic energy ALSO depends on mass (weight) so it has to be moving and has to have weight in order to be called kinetic energy.
The law of conservation of energy states that
A. energy cannot be converted from one from to another
B. energy cannot be created or destroyed
C. energy resources must be used efficiently
D. energy is constantly being lost to friction
Answer:
B
Explanation:
Energy can not be destroyed only converted into another form of energy
Can someone give me a situation where energy is being transferred, transformed or both? Thank you!
I am literally so confused on what the question is asking halp :(
Answer: B
Explanation: Distance/Time but if u want it easier its Velocity=Distance/Time or (Final Velocity -Starting Velocity)/Time
If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay:
how many protons will be left in the nucleus?
how many neutrons will be left in the nucleus?
Answer:
Protons = 28
Neutrons = 42
Explanation:
Alpha decay is one of radioactive decay in which the atomic nuclei can be illustrated by the emission or loss of helium particles of mass number 4 and proton number of 2
Because mass number is the sum of protons and neutrons, If a (hypothetical) atom with 30 protons and 44 neutrons undergoes alpha decay, 28 protons will be left in the nucleus and 42 neutrons will be left in the nucleus.
3.If a force of 12 N is applied to an object with a mass of 2 kg, what will be its acceleration?
Answer:
6 m/s^{2}
Explanation:
The formula for force is
F = mass x acceleration
F = 12 N
mass = 2 kg
So, you can change the formula to solve for acceleration.
acceleration = F / mass
a = 12 N / 12 kg
a = 6 m/s^{2}
If it’s a full moon how much of the moon are you actually seeing ?
Answer:
half of the moon
Explanation:
cause your seeing the front of it
Answer:
The light side of the moon so only half
Explanation: