It is not true about minerals, that they always include oxygen and silicon. Option (A) is correct.
Minerals are inorganic, naturally occurring substances with a crystalline structure and a particular chemical makeup. They are solid substances that are created over a long period of time by geological processes in the crust of the Earth.
Even while silicon and oxygen are frequently occurring components in many minerals, not all minerals necessarily contain these elements. Minerals are inorganic, naturally occurring substances with a crystalline structure and a particular chemical makeup. They can be made of a wide range of substances, including silicon and oxygen, among others.
Hence, It is not true about minerals, that they always include oxygen and silicon. Option (A) is correct.
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A rubber ball is dropped and bounces back up. What kind of energy does the ball have at points A, B, and C?
Answer: At poitns A, B, and C the energy is potential to kinetic energy.
Explanation:
Hope this helped! Thank me with a crown or <3!
A train is moving in a straight railway where it covered one third of the distance with
a speed of 25 km/h and the remaining distance was covered by a speed of 75 km
so the average speed of this train is......... km/h
Answer:
The average speed of the train is 45 km/h
Explanation:
Speed
It's defined as the distance (d) per unit of time (t) traveled by an object. The formula is:
[tex]\displaystyle v=\frac{d}{t}[/tex]
Let's call x the total distance covered by the train. It covered d1=1/3x with a speed of v1=25 km/h. The time taken is calculated solving for t:
[tex]\displaystyle t_1=\frac{d_1}{v_1}[/tex]
[tex]\displaystyle t_1=\frac{1/3x}{25}[/tex]
[tex]\displaystyle t_1=\frac{x}{75}[/tex]
Now the rest of the distance:
d2 = x - 1/3x = 2/3x
Was covered at v2=75 km/h. Thus the time taken is:
[tex]\displaystyle t_2=\frac{d_2}{v_2}[/tex]
[tex]\displaystyle t_2=\frac{2/3x}{75}[/tex]
[tex]\displaystyle t_2=\frac{2x}{225}[/tex]
The total time is:
[tex]\displaystyle t_t=\frac{x}{75}+\frac{2x}{225}[/tex]
[tex]\displaystyle t_t=\frac{3x}{225}+\frac{2x}{225}[/tex]
[tex]\displaystyle t_t=\frac{5x}{225}[/tex]
Simplifying:
[tex]\displaystyle t_t=\frac{x}{45}[/tex]
The average speed is the total distance divided by the total time:
[tex]\displaystyle \bar v=\frac{x}{\frac{x}{45}}[/tex]
Simplifying:
[tex]\boxed{\displaystyle \bar v=45\ km/h}[/tex]
The average speed of the train is 45 km/h
A rock sinks through water at a constant speed. What energy conversion is occurring?
Answer:
Kinetic to potential energy.
Explanation:
A rock sinks through water at a constant speed is a type of kinetic to potential energy conversion. The rock movement refers to kinetic energy whereas sinking in the water represents potential energy due to movement from top to bottom in the water. So we can say that the kinetic to potential energy conversion is occurring in this example.
Two charges q1 and q2 exert a force of 20 N on each other. If the charge of q1 is doubled, what will the new force be? 1) 40N 2) 80N 3) 20 N 4) 10 N
Given :
Two charges q1 and q2 exert a force of 20 N on each other.
To Find :
If the charge of q1 is doubled, what will the new force be?
1) 40 N 2) 80 N 3) 20 N 4) 10 N
Solution :
We know, electrostatic force between two charges is given by :
[tex]F = \dfrac{kq_1q_2}{r^2}[/tex]
Here, F = 20 N.
[tex]20 = \dfrac{kq_1q_2}{r^2}[/tex]
Now, if [tex]q_1[/tex] is doubled :
[tex]F'= \dfrac{k(2q_1)q_2}{r^2}\\\\F'= 2\dfrac{kq_1q_2}{r^2}\\\\F'= 2\times F\\\\ F'= 2\times 20 \ N\\\\F'= 40 \ N[/tex]
Therefore, if the charge of q1 is doubled, new force will be 40 N.
HELLP FO MY FINAL
At an air show, you are watching a group of skydivers when a friend says, "We learned in science class that things fall to Earth because of the law of gravity."
Tell what is wrong with your friend's statement, and explain your reasoning
The figure shows a cube resting on top of a table . If the table rotates and moves the cube in a counterclockwise circle at a constant speed , describe the direction of the acceleration experienced by the cube .
Answer:
Forwarded
Explanation:
which of the following statements best describes the balls motion ?
Answer:
C
Explanation:
Every experiment most control for variables that are not being tested that might also affect the dependent variable. True or false
Answer: Scientist use an experiment to look for cause and effect relationships in nature. They design an experiment so that changes to one Variable (any factor, trait or ... Independent Variable = what you are testing or what you are in control of or what ... A part of the experiment that is not being tested and is used for comparison
Explanation:
How does friction impact work? (that's the whole question)
Two isotopes of carbon, carbon-12 and carbon-13, have masses of 1.993 10^-26 kg and 2.159 10^-26 kg, respectively. These two isotopes are singly ionized ( e) and each is given a speed of 7.50 10^5 m/s. The ions then enter the bending region of a mass spectrometer where the magnetic field is 0.9000 T.
Required:
Determine the spatial separation between the two isotopes after they have traveled through a half-circle.
Answer:
0.0174 m
Explanation:
Given that:
mass of carbon 12 [tex]m_{c \ 12} = 1.993 \times 10^{-26} \ kg[/tex]
mass of carbon 13 [tex]m_{c \ 13} = 2.159 \times 10^{-26} \ kg[/tex]
Speed V = [tex]7.50 \times 10^ 5 \ m/s[/tex]
[tex]q = 1.6 \times 10^{-19 } \ C[/tex]
B = 0.9000 T
[tex]R_1 = \dfrac{ m_{c \ 12} \ v}{ qB}[/tex]
[tex]R_1 = \dfrac{ 1.993 \times 10^{-26} \ 7.50 \times 10^5}{ 1.6 \times 10^{-19} \times 0.90000}[/tex]
[tex]R_1 =0.1038 \ m[/tex]
[tex]R_2 = \dfrac{ m_{c \ 13} \ v}{ qB}[/tex]
[tex]R_2= \dfrac{2.159 \times 10^{-26} \ 7.50 \times 10^5}{ 1.6 \times 10^{-19} \times 0.90000}[/tex]
[tex]R_2 = 0.1125 \ m[/tex]
The spatial separation (D) = [tex]2R_2 - 2R_1[/tex]
[tex]D = 2(0.1125 \ m) - 2(0.1038 \ m)[/tex]
D = 0.0174 m
Tim’s cow is anemic. The cow is lacking which type of nutrient?
Answer:
Iron deficiency
Explanation:
or more scientifically explained as decreased hemoglobin levels in your blood but still caused by lack of iron.
A 1kg sphere rotates in a circular path of radius 0.2m from rest and it reaches an angular speed of 20rad/sec in 10 second calculate the tangential acceleration ?
Answer:
0.4 m/s²
Explanation:
From the question given above, the following data were obtained:
Mass (m) = 1 kg
Radius (r) = 0.2 m
Angular speed (w) = 20 rad/sec
Time (t) = 10 s
Tangential acceleration (aₜ) =?
Next, we shall determine the angular acceleration (a) of the sphere. This can be obtained as follow:
Angular speed (w) = 20 rad/sec
Time (t) = 10 s
Angular acceleration (a) =?
a = w/t
a = 20/10
a = 2 rad/s²
Finally, we shall determine the tangential acceleration (aₜ) of the sphere. This can be obtained as follow:
The tangential acceleration (aₜ) and the angular acceleration (a) are related according to the equation:
Tangential acceleration (aₜ) = Angular acceleration (a) × Radius (r)
aₜ = ar
With the above formula, we can obtain the tangential acceleration (aₜ) as follow:
Radius (r) = 0.2 m
Angular acceleration (a) = 2 rad/s²
Tangential acceleration (aₜ) =?
aₜ = ar
aₜ = 2 × 0.2
aₜ = 0.4 m/s²
Therefore, the tangential acceleration is 0.4 m/s²
what are the properties of heat
Andy is walking around the 100 meter track that has the start line on the west side of the field and has
the 100 meter finish mark on the East side of the field. If it starts at the 5.00 m mark and then travels to
the 8.00 m mark, what is its distance and displacement?
Answer:
its distance and displacement
Explanation:
The wind exerts a force of 425 N to the north on a sailboat, while the water exerts a drag force of 325N in the opposite direction. What is the acceleration of the sailboat if the mass is 4100 kg?
Answer:
its n vv
Explanation:
A 600-MW steam power plant, which is cooled by a nearby river, has a thermal efficiency of 50 percent. Determine the rate of heat transfer to the river water. Will the actual heat transfer rate be higher or lower than this value
Answer: 600MW
Explanation:
First and foremost, we have to calculate the rate of heat that is supposed to the power plant. This will be:
= 600 / 50%
= 600 / 0.5
= 1200 MW
The rate of heat transfer to the river water will then be:
= 1200 - 600
= 600MW
Therefore, the actual heat transfer rate is thesame as this value as we got 600MW.
A car accelerates from rest at 2 m/s2. After 6 seconds, what is the speed of the car?
Answer:
Vf = 12 [m/s]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f}=v_{o}+a*t\\[/tex]
where:
Vf = final velocity [m/s]
Vo = initial velocity = 0 (stars from the rest)
a = acceleration = 2 [m/s²]
t = time = 6 [s]
Now replacing:
[tex]v_{f}=0+2*6\\v_{f}=12[m/s][/tex]
How can density of an object be determined
Answer:
To find the density of an object, start by determining the object's mass and volume. Then, divide the mass by the volume to find the object's density. Remember to write your answer in grams per cubic centimeter. If your answer is long, you can round it down to 2 or 3 digits past the decimal place!
Explanation:
Density of an object can be determined dividing mass with volume of the given object.
What is density and volume ?
Density is the measurement of compactness of the atoms, greater the atoms are compacted greater is the density of the material. Whereas, Volume is a three dimensional space occupy by the body of particular shape. Generally expressed in cubic meter.
Therefore, to find the density of an object first it should have known mass and volume. Now divide the mass with volume the result is the value of density. It must be noted that the units to be consider are mass in Kg, volume in m³ and the unit of density will be kg/m³.
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A helium-neon laser (λ = 633 nm) illuminates a single slit and is observed on a screen 1.50 m behind the slit. The distance between the first and second minima in the diffraction pattern is 3.75 mm .
Required:
What is the width (in mm) of the slit?
Answer:
d = 0.25 mm
Explanation:
The position that the Minimal fall in single silt diffraction pattern can be written as
y=λmD/d ..........eqn(1)
(y2 - y1 )= difference of y that exist between first and second minima
D= distance of slit from the screen=1.50m
d= width of the slit
λ= 633 nm = 633×10^-9m
y= position of pth minimal
eqn(1) can be written as
(y2 - y1)= λmD/d .........eqn(2)
If we substitute the given values we have
(y2 - y1 )= [ (2×633×10^-9 × 1.50) /d] -[ (1×633×10^-9 × 1.50) /d]
Simplyfying
(y2 - y1)=(9.495×10^-7)/d
But The distance between the first and second minima in the diffraction pattern = 3.75, which implies that (y2 - y1) = 3.75mm=
✓ we can substitute (y2 - y1)= 3.75mm=3.75 ×10^-3 into expression above
3.75 ×10^-3 =(9.495×10^-7)/d
The we can make "d" subject of the formula
d=(9.495×10^-7)/ (3.75 ×10^-3)
d=0.00025m
d=0.25×10^-3 m
d=0.25 mm
Hence, the width (in mm) of the slit is 0.25mm
What is magnitude of the acceleration of a particle of mass and charge placed between the plates of a parallel plate capacitor of charge density
Answer:
a = Qo / E0m
Explanation:
The acceleration of a particle of mass m and charge q placed between the plates of a parallel plate capacitor is, [tex]a=\frac{q*E}{m}[/tex]
Let us consider that mass and charge of particle is m and q.
and electric filed between plates of a parallel plate capacitor is E.
The force on a particle between plates of capacitor is given as,
[tex]F=q*E[/tex]
And also, [tex]F=m*a[/tex]
Where a is acceleration of particle.
From above equations,
[tex]m*a=q*E\\\\a=\frac{q*E}{m}[/tex]
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What is an example of a secondary group?
A. the attendees of a video-gaming conference
B. the employees of Coca-Cola Corporation
C. the members of a family
D. the teachers from the science department
Answer:(D)The teachers from the science department
Explanation:I took the quiz
Why does the shape of the lens in your eye change?
The Lens Changes Shape to Focus Near Objects. Light rays from objects that are close to the eye are not parallel. Therefore, the eye must bend them more in order to focus the rays on the retina. To accomplish this, the lens change shape.
Hope this helps
Answer:
to focus the light
pls explain why
two cars start a trip of 200 km at the same time. the first car travels at 90 km/h and the second at 110 km/h. how much more time in minutes does it take for the slower car to reach its destination?
Answer:
5
Explanation:
give thanks pls
As a projectile thrown upward moves in its parabolic path, at what point along its path are the velocity and acceleration vectors for the projectile perpendicular to each other
Answer: Maximum height
Explanation:
Suppose a projectile is thrown at an angle of [tex]\theta[/tex] with velocity u
As the projectile moves upward, its vertical component of velocity decreases due to gravity. While the horizontal component remains the same as there is no acceleration in the horizontal direction.
At maximum height vertical component of velocity is zero. At this instant horizontal component of velocity is perpendicular to the acceleration due to gravity. This can be explained with the diagram.
A rocket engine has a chamber pressure 4 MPa and a chamber temperature of 2000 K. Assuming isentropic expansion through the nozzle, and an exit Mach number of 3.2, what are the static pressure and temperature in the exit plane of the nozzle
This question is incomplete, the complete question is;
A rocket engine has a chamber pressure 4 MPa and a chamber temperature of 2000 K. Assuming isentropic expansion through the nozzle, and an exit Mach number of 3.2, what are the stagnation pressure and temperature in the exit plane of the nozzle? Assume the specific heat ratio is 1.2.
Answer:
- stagnation pressure is 274.993 Mpa
- the stagnation temperature Tt is 4048 K
Explanation:
Given the data in the question;
To determine the stagnation pressure and temperature in the exit plane of the nozzle;
we us the expression;
Pt/P = (1 + (γ-1 / 2) M²)^(γ/γ -1) = ( Tt/T )^(γ/γ -1)
where Pt is stagnant pressure = ?
P is static pressure = 4 MPa = 4 × 10⁶ Pa
Tt is stagnation temperature = ?
T is the static temperature = 2000 K
γ is ratio of specific heats = 1.2
M is Mach number M = 3.2
we substitute
Pt/P = (1 + (γ-1 / 2) M²)^(γ/γ -1)
Pt = P(1 + (γ-1 / 2) M²)^(γ/γ -1)
Pt = 4 × 10⁶(1 + (1.2-1 / 2) 3.2²)^(1.2/1.2 -1)
Pt = 4 × 10⁶ × 68.7484
Pt = 274.993 × 10⁶ Pa
Pt = 274.993 Mpa
Therefore stagnation pressure is 274.993 Mpa
Now, to get our stagnation Temperature
Pt/P = ( Tt/T )^(γ/γ -1)
we substitute
274.993 × 10⁶ Pa / 4 × 10⁶ Pa = ( Tt / 2000 )^(1.2/1.2 -1)
68.7484 = Tt⁶ / 6.4 × 10¹⁹
Tt⁶ = 68.7484 × 6.4 × 10¹⁹
Tt⁶ = 4.3998976 × 10²¹
Tt = ⁶√(4.3998976 × 10²¹)
Tt = 4047.999 ≈ 4048 K
Therefore, the stagnation temperature Tt is 4048 K
A flower vase is sitting on a shelf when a gust of wind from an open
window blows it down. If the vase has a mass of 0.6 kg and the shelf is 1.5
m off the ground, what is the gravitational potential energy of the vase
before it falls?
Answer:
8.82 J
Explanation:
Recall that gravitational potential energy is defined as:
U = m * g * h
Then in our case, the gravitational potential energy U would be:
U = 0.6 * 9.8 * 1.5 J = 8.82 J
Ram covers distance of zoom in 50 seconds what is his speed
Answer:
speed = distance/time
this is the equation substitute your values and get the answer....btw check you question again..
Some one plzzz help
Answer:
138 km
Explanation:
The properties of elements can be predicted by which of the following?
Answer:
1 Answer. The Periodic Table can predict the properties of new elements, because it organizes the elements according to their atomic numbers. Creating new elements is not a simple process. Scientists use a particle accelerator to smash light atoms into a thin metallic foil that contains heavier atoms.
Explanation:
The coefficient of friction on a surface is 0.25. A box requires 100N to slide it across the surface. What is the weight of the box?
