Answer:
The solid separates and disperse uniformly throughout the solution.
which atomic particle has no charge?
A. Electron
B. Neutron
C. Nucleus
D. Proton
Answer:
B. Neutron has no charge
Answer:
B. Neutron
Explanation:
Firstly, the nucleus is what contains the protons and electrons, so it is not an atomic particle. The electron has a negative charge, and the proton has a positive charge (you can remember this by looking at its prefix 'pro'). This means the neutron has no charge (think of it as neutral).
when a body of mass 0.25kg is acted upon by a force, the velocity changes from 5m/s to 7.5m/s. Calculate the work done by the force
Answer:
Work done by the force = 1/2m×(v2 - v1)²
m = mass
v2 = final velocity
v1 = initial velocity
= 1/2(0.25)(7.5-5)²
= 1/2(0.25)(2.5)²
= 1/2(0.25)(6.25)
= 0.78J
Hope this helps.
Write a statement about your understanding of how momentum is conserved during a collision
If an object is thrown up at an initial velocity of 9.8 m/s, how long will it take to fall back to the ground?
What is the frequency of a wave if 10 waves go past in 1 second ?
Answer:
f = 10 Hz
Explanation:
We need to find the frequency of a wave if 10 waves go past in 1 second. Total number of waves per unit time is called frequency. So,
[tex]f=\dfrac{10}{1}=10\ Hz[/tex]
So, the frequency of a wave is 10 Hz.
A car travels 20 miles in 1 hour 15 minutes. What is its average speed
If a car travels 20 miles in 1 hour and 15 minutes, then the average speed of the car would be 7.15 meters/second.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.
As given in the problem, if a car travels 20 miles in 1 hour and 15 minutes, then we have to find the average speed of the car,
1 mile = 1609 meters
20 miles = 20*1609 meters
= 32180 meters
1 hour = 3600 seconds
1 minutes = 60 seconds
15 minutes = 15*60
=900 seconds
1 hour and 15 minutes = 4500 seconds
The average speed of the car = The distance traveled by car/time
= 32180 meters / 4500 seconds
= 7.15 meters / seconds
Thus, the average speed of the car would be 7.15 meters/second.
To learn more about speed from here, refer to the link;
brainly.com/question/7359669
#SPJ2
Date
Page
710
Amachine raises a load of 750N
through a height
of 16m in 5 sec
calculate
a) work done by machine
b) Power of machine
Answer:
W=F×H,Power=W/Time
Explanation:
W=Force ×Height
750N×16 =12000
Power=Work/Time
12000/5=2400J
Электролиз продолжался 4 часа, при этом на катоде выделилось 16 g серебра. Электрохимический эквивалент серебра 1,118 mg/C. Чему равна сила тока (А) электролиза?
Answer:
Сила тока 0.994 А
Explanation:
Параметры приведены ниже;
Время = 4 часа = 14 400 с
Масса выпущенного серебра = 16 г
Электрохимический эквивалент серебра = 1,118 мг / с
Формула для количества электричества Q дается следующим образом;
Q = I × t
Куда;
I = ток (A)
t = время в секундах, с
Масса m, образующаяся при электролизе, определяется соотношением;
[tex]m = E_c \times Q = E_c \times I \times t[/tex]
Куда;
[tex]E_c[/tex] = Электрохимический эквивалент серебра = 1,118 мг / с
м = 16 г
Подставляя значения, мы имеем;
Который дает;
[tex]I = \dfrac{16}{1.118 \times 10^{-3} \times 14,400} = 0.994 \, A[/tex]
Следовательно, сила тока = 0,994 А.
Alexander calder's mobiles are an example of _________ motion because it uses forces of wind and water.
Answer:
It is an example of kinetic art motion
Explanation:
Alexander caders's mobile was made by an American sculptor called Alexander Cader. He made innovative kinetic mobile sculptures that use that uses motor or air currents.
Alexander caders's mobile is a kinetic sculptures because movement is it's basics. The sculptures is well moved by air currents. The Alexander cader mobiles make movement as integral part of the design of the sculpture.
The sputnik one satellite orbiting earth mass equals 5.98×10 to the 24th power kilograms in a circle of radius 6.96×10 to the six power meters what was its orbital velocity
Answer:
7572 m/s
Explanation:
The force between two masses separated by a distance r is given as:
[tex]F=G\frac{m_1m_2}{r^2}[/tex]
Where F is the attractive force between 2 masses, m1 and m2, r is the distance between the centres of the masses and G is the universal gravitation constant, which is [tex]6.674*10^-11 Nm^2/kg^2[/tex]
The mass of the earth ([tex]m_1[/tex]) is far greater than the mass of the sputnik ([tex]m_2[/tex]). Therefore [tex]m_1m_2=m_1[/tex]. The mass of the sputnik is neglected, therefore:
[tex]F=G\frac{m_1}{r^2}=\frac{(6.674*10^{-11})(5.98*10^{24})}{(6.96*10^6)^2} = 8.2389N[/tex]
But F is actually centripetal acceleration, a = v²/r
[tex]8.2389 = v^2 / 6.96*10^6\\v=7572m/s[/tex]
When asked to name all the forces on a marker sitting in equilibrium on a desk, a student responds: “Since the marker on the desk is at rest, there are no forces
acting on it.” Why is this wrong? How would you restate it?
Answer:
The forces acting on the pen which is still on the table can have two forces acting on them. The forces are gravitational force and the equal and opposite force to the gravitational forces.
The equal and opposite forces that is applied on the pen keeps the pen still on the table.
So, the statement that no force is applied on the pen which is kept still on the table is wrong as two forces are applied on the pen.
As both the forces are equal and opposite so it is cancelled and is still.
lighting converts ... energy, into ... energy.
Explanation:
lighting converts heat energy.
hope you like this .
Sobre un velero actúa la fuerza del motor de 900 N y perpendicularmente a ella, la del viento de 750 N. Si se mueve con MRU, ¿qué fuerza de rozamiento actúa sobre el barco?
Answer:
[tex]F=F_{f}=1171.5 N[/tex]
Explanation:
We know that the sailboat has a uniform movement, therefore the total force, the engine, and the wind must be equal to the friction force.
[tex]F=F_{f}[/tex]
[tex]F=F_{f}=\sqrt{F^{2}_{engine}+F^{2}_{wind}}[/tex]
[tex]F=F_{f}=\sqrt{900^{2}+750^{2}}[/tex]
[tex]F=F_{f}=1171.5 N[/tex]
Therefore the friction force is 1171.5 N.
I hope it helps you!
What change occurs to the gravitational force of attraction between two bodies when the
distance between them is made half (1/2) by keeping masses constant?
Answer:
when the radius is halved, F becomes 4 times
Explanation:
The formula is given by
[tex]F = \frac{Gm1m2}{r^2}[/tex]
When r is halved:
[tex]F = \frac{Gm1m2}{(1/2r)^2}[/tex]
=> [tex]F = \frac{Gm1m2}{1/4 r^2}[/tex]
=> [tex]F = 4(\frac{Gm1m2}{r^2} )[/tex]
This means when the radius is halved, F becomes 4 times
6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the
gravitational potential energy of the rock when measured from the surface of the
river? What is the gravitational potential energy when measured from the edge of
the bridge?
Answer: 71 J
Explanation: The formula for gravitational potential energy is Epg= mgh.
So you plug in 2.2 as m, 3.3 as h and 9.81 as g. Once you do that you should get an answer of 71.2206. But because there are only two significant digits in the question, your answer must also have two significant digits.
The gravitational potential energy of the rock of 2.2 kg that is 3.3 m above the river is 71 J. The potential energy of the rock when measured from the edge of the bridge is zero where because rock is resting in the edge itself , so height will be zero.
What is gravitational potential energy ?Potential energy of an object is the energy generated by virtue of its position. Thus the energy is stored on the object when it rest. The energy stored on it when it is in a gravitational field is called its gravitational potential energy.
The gravitational potential energy of an object is given as follows;
p = mgh
where h is the height from the surface.
Given mass of the rock, m = 2.2 Kg
height = 3.3 m
g = 9.8 m/s²
then, p = 2.2 kg × 3.3 m × 9.8 m/s² = 71 J.
Therefore, the gravitational potential energy of the rock is 71 J.
Find more on potential energy:
https://brainly.com/question/12807194
#SPJ5
An atom of xenon has a mass number of 127 amu. How many neutrons
does it contain? *
Answer:
73 neutrons.
Explanation:
Data obtained from the question:
Mass number of Xenon = 127.
Neutron number =...?
We can obtain the number of neutron present as follow:
Atomic number of Xenon = 54
Recall:
Atomic number = proton number = 54
Mass number = proton + neutron
127 = 54 + Neutron
Neutron = 127 – 54
Neutron = 73.
Therefore, 73 neutrons are present in the Xenon atom.
What is the SI unit used to measure force?
Newton
Meter
Pascal
Joule
Answer:
newton(N)
Explanation:
A 7.12 μC charge is moving at the speed of light in a magnetic field of 4.02 mT. What is the force on the charge?
Answer:
858.7 N
Explanation:
The magnetic force on the charge F = Bqv where B = magnetic field strength = 4.02 mT = 4.02 × 10⁻³ T, q = charge = 7.12 μC = 7.12 × 10⁻⁶ C and v = c = speed of light = 3 × 10⁸ m/s
F = Bqc
= 4.02 × 10⁻³ T × 7.12 × 10⁻⁶ C × 3 × 10⁸ m/s
= 858.7 N
Elias serves a volleyball at a velocity of 16 m/s. The mass of the volleyball is 0.27 kg. What is the height of the volleyball above the gym floor if its total mechanical energy is 41.70 J? Round to the nearest tenth. m
Answer:
The correct answer to the following question will be "2.7 m".
Explanation:
The given values are:
Velocity, v = 16 m/s
mass, m = 0.27 kg
Mechanical energy, M.E = 41.70 J
g = 9.8 m/s²
As we know,
Kinetic energy, [tex]K=\frac{mv^2}{2}[/tex]
Potential energy, [tex]U=m.g.h[/tex]
Now, the total mechanical energy will be:
⇒ [tex]\frac{mv^2}{2}+U[/tex]
⇒ [tex]41,71 \ kg.m^2/s^2[/tex]
Now,
⇒ [tex]h=\frac{E-(\frac{mv^2}{2})}{mg}[/tex]
On putting the estimated values, we get
⇒ [tex]=\frac{41.70-(\frac{0.27(16)^2}{2})}{0.27\times 9.8}[/tex]
⇒ [tex]=\frac{41.70-(\frac{0.27\times 256}{2} )}{2.64}[/tex]
⇒ [tex]=\frac{41.70-34.56}{2.64}[/tex]
⇒ [tex]=\frac{7.14}{2.64}[/tex]
⇒ [tex]=2.7 \ m[/tex]
Answer:
2.7 m
Explanation:
Gold has a density of 19300 kg/m³. Calculate the mass of 0.02 m³ of gold in kilograms.
Answer:
Mass = 386 kg
Explanation:
Density = Mass / Volume
Mass = Density × Volume
Where D = 19300 kg/m³ , V = 0.02 m³
Putting the given in the above formula
Mass = 19300 × 0.02
Mass = 386 kg
Answer:
386 kg
Explanation:
mass = density * volume
= 19300 * 0.02
= 386 kg
Hope this helps!
Sunidhi made a study chart about changes in states of
matter.
Which headings best complete the chart?
X
melting
sublimation
Y
freezing
deposition
X: Solid Directly to Liquid
Y: Liquid Directly to Solid
OX: Liquid Directly to Solid
Y: Solid Directly to Liquid
O X: Heat Is Released
Y: Heat Is Absorbed
X: Heat Is Absorbed
Y: Heat Is Released
Answer:
freezing melting sublimating x y
x and
Explanation:
To drop a table of states of matter the best headings must be
table name: matter state
freezing melting sublimation x y
This order goes from the solid state to the gaseous state, which is obtained by introducing heat into the system
Answer: D on edge
X: Heat Is Absorbed
Y: Heat Is Released
Explanation:
sublimation and melting are both absorbing heat(aka getting warmer)as they change state while freezing and deposition are releasing heat(aka getting colder)as they change state
A body of mass 1kg has a 25kgsmsqure moment of inertia about its center of mass. if it rotated about an axis which has a displacement (5,12)m, its moment of inertia about this axis becomes
Answer:
194 kg m²
Explanation:
Use parallel axis theorem:
I = I₀ + mr²
I = 25 kg m² + (1 kg) ((5 m)² + (12 m)²)
I = 25 kg m² + 169 kg m²
I = 194 kg m²
Dynamo converts the
a》mechanical energy into electrical energy
b》chemical energy into electrical energy
c》heat energy into electrical energy
d》none of the above
Answer:
[tex] \gamma \: dynamo \: converts \: the \: mechanical \: energy \: into \: electrical \: energy \: .[/tex]
Explanation:
Hope it helps you :)))
Answer:
.
Explanation:
PLEASE HELP
GREATLY APPRECIATED IF YOU DO
Answer:
a. 38400j
Explanation:
p= mgh
2400×10×1.6
If the distance is halved and the charges of both particles are doubled, the force is ________ as great.
Answer:
The new force is 16 times of the initial force.
Explanation:
The electric force between charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
If the distance is halved, d' =d/2 and charges are doubles, [tex]q_1'=2q_1\ \text{and}\ q_2'=2q_2[/tex]
New force becomes,
[tex]F'=\dfrac{kq_1'q_2'}{r'^2}\\\\F'=\dfrac{k(2q_1)(2q_2)}{(d/2)^2}\\\\F'=16\times \dfrac{kq_1q_2}{r^2}\\\\F'=16F[/tex]
So, the new force is 16 times of the initial force.
If the distance is halved and the charges of both particles are doubled, the force is 16 times as great.
Coulomb's LawAccording to Coulomb's law, the electrostatic force between two charges is given by;
[tex]F=k\frac{q_1 q_2}{r^2}[/tex]
Where 'k' is the Coulomb's constant.
If the charges of both particles are doubled and the distance is halved, the new force will be;
[tex]F\,'=k\frac{2q_1 \times 2q_2}{(r/2)^2}=k \frac{4\times 4\times q_1 q_2}{r^2} =16\,F[/tex]
So, the new force will be 16 times greater than the old force.
Learn more about Coulomb's law here:
https://brainly.com/question/14049417
why is the term impulsive of force coined
Answer: Impulse of force is a process of reducing and minimizing the impact of force on the object.
Explanation:
If an impact stops the moving object then the change in momentum will become a fixed quantity, extending the time of collision and reducing the time of impact.
For example, If a person jumps to the ground with a certain height the person will bend knees to extend the time of collision while hitting the ground and reducing the time of impact to prevent much injury.
what is the frequency of an ocean wave that is traveling at a speed of 45 m/s if it has a wavelength of 3 meters.
please show work
Answer:
The frequency of an ocean wave is 15 Hz.
Explanation:
We are given with, the speed of an ocean wave is 45 m/s. Its wavelength is 3 m
It is required to find the frequency of an ocean wave.
The speed of a wave is given in terms of frequency and wavelength as :
[tex]v=f\lambda[/tex],
f = frequency of ocean wave
[tex]f=\dfrac{v}{\lambda}\\\\f=\dfrac{45}{3}\\\\f=15\ Hz[/tex]
So, the frequency of an ocean wave is 15 Hz.
Calculate the amount of energy transferred when a 40w light bulb is left on for 30 minutes.
Answer:
E=72000J or 72kj
Explanation:
The formula is E=pt you need to convert your t from minutes to seconds before proceeding
if a 10 kg object has a kinetic energy of 20 J what is its speed and what is the formula used to calculate speed
Answer:
2 meter per second
Explanation:
kinetic energy = 1/2 m v^2
20J = 1/2 × 10 × v^2
v^2 = 4
v= 2 m/s
if a ray of light is incident on plane mirror at an angle of 300 its angle of reflection is.
Answer:
300°
Explanation:
both the angles of incidence and reflection are the same
