Do metals that react vigorously with hydrochloride acid also react vigorously with sulfuric acid?
Answer:
yes
Explanation:
Reactions of acids with metals
Acids react with most metals and, when they do, a salt is produced. But unlike the reaction between acids and bases, we do not get water. Instead we get hydrogen gas.
This is the general word equation for the reaction:
metal + acid → salt + hydrogen
For example, magnesium reacts with hydrochloric acid to produce magnesium chloride:
magnesium + hydrochloric acid → magnesium chloride + hydrogen
Mg + 2HCl → MgCl2 + H2
It doesn't matter which metal or which acid is used, if there is a reaction we always get hydrogen gas as well as the salt. However, how quickly the reaction goes depends on the metal used and how high up in the reactivity series it is.
A rock is thrown down from the top of a cliff with a velocity of 3.61 m/s (down). The cliff is 28.4 m above the ground. Determine the velocity of the rock just before it hits the ground.
The velocity of the rock just before it hits the ground is approximately 23.87m/s.
What is the velocity of the rock just before it hits the ground?From the third equation of motion;
v² = u² + 2gs
Where u is initial velocity, v is final velocity, g is acceleration due to gravity ( g = 9.8m/s² ) and s is distance covered.
Given the data in the question;
Initial velocity u = 3.61m/sHeight of cliff s = 28.4mFinal velocity v = ?To determine the final velocity, plug the given values into the equation of motion above.
v² = u² + 2gs
v² = ( 3.61m/s )² + ( 2 × 9.8m/s² × 28.4m )
v² = 13.0321m²/s² + 556.64m²/s²
v² = 569.6721m²/s²
v = √( 569.6721m²/s²)
v = 23.87m/s
Therefore, the final velocity of the object is 23.87m/s.
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Sound travels through air at 343 m/s at 20 °C. A bat emits an ultrasonic squeak and hears the echo 0.05 second later . How far away was the object that reflected it?
Answer:
8.575 m
Explanation:
speed = distance/time
distance -- 2d
343 = 2d/0.05
2d = 17.15
d = 17.15/2
d = 8.575
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A lamp has a current of 2.0 amperes at 6.0 volts. What is the resistance of lamp?
Answer: B 3.0
Explanation:
5. Which energy transformation would friction
cause on a moving train?
A. kinetic energy into thermal energy
B. potential energy into sound energy
C. kinetic energy into potential energy
D. thermal energy into potential energy
Answer:
Fossil fuels store energy from the sun as
Explanation:
16. A student uses 110 N of force to push a box
across a flat room for 7.2 m. Calculate the
amount of work that the student does. Round
your answer to two decimals and show the
correct units of measure.
Answer:
792J
Explanation:
Use the formula Force × Distance
With 110 newtons being the force and 7.2 meters being the distance
Which gives 792 and work us measured in joules therefore its joules
Work done is the dot product of force and displacement. The work done on the box to push across the surface for 7.2 m by applying a force of 110 N is 792 J.
What is force?Force is an external agent acting on a body tp change it from the state of motion or rest. Force is a vector quantity thus, it is characterized by a magnitude and direction.
When force acting on a body results in displacement of the body, it is said to be work done on the body. The work done on the body is the product of force and displacement.
W = F d.
Given the force acting on the box = 110 N
displacement d = 7.2 m
Work done w = 110 N × 7.2 m
= 792 J.
Therefore, the work done on the box is 792 J.
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The speed of light in a piece of plastic is 1.87 × 10^8 meters per second. What is the absolute index of refraction of this plastic?
Question 11 options:
1.00
1.6
0.67
1.33
[tex]\tt\red{See \; Your \: Answer!}[/tex]
Your answer was 0.67m...
The emission spectrums are known for the elements below.
What elements are in the unknown sample?check all that apply
Answer: Hello your question is incomplete, I was able to find the question online but I am unable to attach it due to plagiarism rules
answer : Lithium and Potassium
Explanation:
The elements that are in the unknown sample are : Lithium and Potassium
An Emission spectrum is used to determine the composition of a material and it is distinctively different for each element that us found on the period table
Complex matching suggests that individuals who have formed a relationship may differ predominantly in the area of __________.
Answer:
physical attractiveness
Explanation:
ASAP will do brainiest 22 points PLSS HELP
Sports such as football, baseball, soccer, horseback riding, tennis, volleyball, skateboarding, and surfing (to name a few) are full of examples of Newton’s Three Laws of Motion. To answer this question: 1. Choose any sport. Write down the name of the sport. 2. In your own words, state each of Newton’s 3 Laws of Motion and give a clear, specific example of how each law applies to the sport you have chosen.
Answer:
tenis
Tenis applies to each of Newton's 3 Laws of Motion because with the first law if a tenis ball is at rest it will stay at rest unless acted on by an unbalanced force which would be playing tenis in which it would stay in motion. The second law applies since the acceleration at which it is hit times the mass equals the force it has. The third law applies since when hitting a tenis ball back and forth with racquets the reaction may be equal or opposite
A student is constructing an investigation on static electricity. The student has three balloons and rubs two of them on a piece of wool. The student then touches each balloon to the wall to observe if static electricity would cause the balloon to stick. What is the independent variable in this investigation.
Answer:
Explanation:
As given, the student has three balloons and rubs two of them on a piece of wool. The rubbing of balloon on wool is the independent variable as it was done on two and not on the third as control.
how does energy apply to newton’s laws?
Answer:
the acceleration of an object is directly pro to the net force acting on it and indirectingly proportional to its mass
A capacitor has plates of area 5.25 * 10 ^ - 5 * m ^ 2 which are separated by 3.14 * 10 ^ - 6 * m . What is its capacitance?
Answer:
1.47 x 10^-10
Explanation:
Acellus
The capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex]F.
The capacitance (C) of a capacitor is determined by the formula:
C = (ε₀ ×A) / d
Where:
C is the capacitance
ε₀ is the permittivity of free space (ε₀ ≈ 8.85 × [tex]10^{(-12)[/tex] F/m)
A is the area of the plates
d is the distance between the plates
Given:
Area of the plates (A) = 5.25 × [tex]10^{(-5)[/tex]m²
Distance between the plates (d) = 3.14 × [tex]10^{(-6)[/tex] m
Using the given values, we can calculate the capacitance:
C = (ε₀ ×A) / d
C = (8.85 × [tex]10^{(-12)[/tex] F/m) × (5.25 × [tex]10^{(-5)[/tex] m²) / (3.14 × [tex]10^{(-6)[/tex]m)
Simplifying the expression:
C = (8.85 × 5.25 × [tex]10^{(-12 - 5)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])
C = (46.4625 × [tex]10^{(-17)[/tex]) / (3.14 × [tex]10^{(-6)[/tex])
C = 14.805 × [tex]10^{(-17 - (-6)}[/tex])
C = 14.805 × [tex]10^{(-11)[/tex]
Using scientific notation, capacitance as:
C = 1.4805 × [tex]10^{(-10)[/tex] F
Therefore, the capacitance of the given capacitor is approximately 1.4805 × [tex]10^{(-10)[/tex] F.
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a volleyball player has spiked the ball. At the instant the ball leaves her hand, it is 2.6 m above the ground and has an initial vertical velocity of -20 m/s. How long will it take the ball to strike the ground if the opposing team doesn't block it?
Answer: 29.48 s
Explanation:
Given
The initial height of the ball is [tex]h=2.6\ m[/tex]
The ball leaves with an initial velocity of [tex]u=-20\ m/s[/tex]
Using the equation of motion
[tex]h=ut+\dfrac{1}{2}at^2\\\text{Insert the values}\\\\2.6=20\cdot t+\dfrac{1}{2}\times 9.8\times t^2\\\\\Rightarrow 9.8t^2+20t-5.2\\\\\Rightarrow t=\dfrac{-20\pm \sqrt{20^2-4\times 9.8\times (-5.2)}}{2\times 9.8}\\\\\Rightarrow t=\dfrac{-20\pm 603.84}{19.8}\\\\\Rightarrow t=29.48\ s\quad [\text{Neglecting negative t}][/tex]
Therefore, it take 29.48 s for ball to reach the ground.
I need help please and thanks
Answer:
4.Given:
m=1000kg
a=(3m/s)^2
F=m×a
=1000×3
=3000N
5.Given:
m=50kg
a=(5m/s)^2
F=m×a
=50×5
=250N
6. Given
F=250N
a=(5m/s)^2
m=?
F=m×a
250N=m×(5m/s)^2
m×(5m/s)^2=250N
m=250N÷(5m/s)^2
m=50kg
Which statement best explains why there could be a force of attraction
between two electrically charged objects?'
because they have like charges
because they have unlike charges
because they have the same number of protons
because they have the same number of electrons
How much kinetic energy is required to break through?
Explanation:
The natural environment or natural world encompasses all living and non-living things occurring naturally, meaning in this case not artificial. The term is most often applied to the Earth or some parts of Earth
A Star fleet science officer drops a large rock from a height of 1.55 m onto the surface of an alien planet. The rock strikes the ground in 0.230 s. Determine the acceleration of gravity.
Answer:
58.6 m/s²
Explanation:
Applying,
s = ut+gt²/2............ equation 1
Where s = height of the rock, u = initial velocity, t = time, g = accelration due to gravity of the planet.
From the question,
Given: s = 1.55 m, t = 0.23 s, u = 0 m/s (dropped from an height)
Substitute these values into equation 1
1.55 = (0×0.23)+g(0.23²)/2
1.55 = 0.0529g/2
0.0529g = 3.1
g = 3.1/0.0529
g = 58.6 m/s²
The figure below shows the apparatus used to measure the specific heat capacity of a metal. The electric heater is switched on and supplies 17 000 of thermal energy (heat) to the block of metal. The temperature of the metal rises from 16 °C to 38 °C. The mass of the block of metal is 850 g. No energy is lost from the metal. Calculate the specific heat capacity of the metal.
Answer:
0.909 J/gºC.
Explanation:
From the question given above, the following data were obtained:
Heat (Q) = 17000 J
Initial temperature (T₁) = 16 °C
Final temperature (T₂) = 38 °C
Mass (M) = 850 g
Specific heat capacity (C) =?
Next, we shall determine the change in the temperature of the metal. This can be obtained as follow:
Initial temperature (T₁) = 16 °C
Final temperature (T₂) = 38 °C
Change in temperature (ΔT)
ΔT = T₂ – T₁
ΔT = 38 – 16
ΔT = 22 °C
Finally, we shall determine the specific heat capacity of the metal. This can be obtained as follow:
Heat (Q) = 17000 J
Change in temperature (ΔT) = 22 °C
Mass (M) = 850 g
Specific heat capacity (C) =?
Q = MCΔT
17000 = 850 × C × 22
17000 = 18700 × C
Divide both side by 18700
C = 17000 / 18700
C = 0.909 J/gºC
Therefore, the specific heat capacity of the metal is 0.909 J/gºC.
Can someone help me please??
Which is not true about the role of gravity in the formation of planets?
A. Dust and gas particles that were attracted to each other began to rotate into a protoplanetary disk.
B. Gravity between planetesimals caused them to join together into conglomerate clumps.
C. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
D. Gravity of larger objects in orbit around the sun attracted, and cleared the orbital path of, smaller planetesimals, gas, and dust.
24. ____
Choose the most accurate description of the dimensions of our solar system:
a. The planets are approximately the same size as each other, and orbit at evenly-spaced distances from the sun.
b. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
c. Rocky planets alternate with gas giants as they orbit at even intervals from the sun
d. Gas planets are small, orbiting relatively close to the sun, while large, dense rocky Giants
orbit the sun at great and varying distances.
25. ____ A new object was discovered in the Kuiper Belt. At 6 billion km from the sun, it could be the newest dwarf planet. How many AU is it from the sun? Use 150,000,000 km as Earth’s orbital distance.
a. 90AU b. 9AU c. 400AU d. 40AU
1. Our solar system is the only place in the universe where gravity played a key part in the formation of planets.
2. Rocky planets are small, dense, and orbit relatively close to the sun, compared to the Jovian planets, which are large, less dense, and orbiting far from the sun.
3. _______
A boat produces a wave as it passes an aluminum can floating in a lake. Explain why the can merely moves up and down while waves propagate away from the disturbance caused by the boat.
Answer:
Due to waves.
Explanation:
The can merely moves up and down because the movement of the waves that propagate away from the disturbance caused by the boat. The Can has low density due to low mass and high volume which allow the can to float on the surface of water after prevent it from the drowning. The wave moves the can up and down but prevent it from going deep inside the water so we can say that the can moves due to movement of waves in water.
Make a free-body diagram of someone pushing a refrigerator that shows:
a. A net force of 100 N with the refrigerator being pushed to the right.
b. The refrigerator is balanced on the floor.
The free body diagram allows to find the results for the forces applied on the refrigerator are;
a) Free-body diagram with applied force.
b) Free-body diagram without applied force.
A free-body diagram is a diagram of the forces without the details of the body, these diagrams are important to clearly visualize the forces and the coordinate systems against which to take measurements.
In the attached we have a free-body diagrams for a refirerator, represented by the box where the forces are appreciated:
The weight that the forces exerted by the earth on the refrigerator. The Normal which is the reaction of the earth to the support of the refrigerator. The force applied by the person. The friction force which is the force between the two surfaces that opposes the movement of the refrigerator.
Newton's second law states that the net force is proportional to the mass times the acceleration of the body.
∑ F = ma
where F is the force, m the mass and the acceleration
∑ F = F - fr = 100 N
a = 100 / m
In conclusion with the free body diagram we can find the results for the forces applied on the refrigerator are;
a) Free-body diagram with applied force.
b) Free-body diagram without applied force.
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Force F=5 N acts to the right
Answer:
Calculations involving forces
The resultant force is the single force that has the same effect as two or more forces acting together.
Two forces in the same direction
Two forces that act in the same direction produce a resultant force that is larger than either individual force.
You can easily calculate the resultant force of two forces that act in a straight line in the same direction by adding their sizes together.
Example
Two forces, 3 N and 2 N, act to the right. Calculate the resultant force.
Two arrows, one above the other, both pointing to the right, one labelled 2 N and one labelled 3 N. Then an equals sign and then another arrow to the right labelled 5 N.
Two forces acting in the same direction
Resultant force F = 3 N + 2 N = 5 N to the right.
The resultant force is 5 N to the right.
Two forces in opposite directions
Two forces that act in opposite directions produce a resultant force that is smaller than either individual force.
To find the resultant force subtract the magnitude of the smaller force from the magnitude of the larger force.
The direction of the resultant force is in the same direction as the larger force.
Example
A force of 5 N acts to the right, and a force of 3 N act to the left.
Calculate the resultant force.
Two arrows, one above the other, one pointing to the left, labelled 2 N, the other pointing to the right labelled 3 N. Then an equals sign, with an arrow to the right labelled 1 N.
Two forces acting in opposite directions
Resultant force F
Resultant force F = 5 N - 3 N = 2 N to the right.
The resultant force is 2 N to the right.
Explanation:
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After hearing about an accident on his normal route, Mr. Gujral checks for alternate routes to get to work. What type of circuit does this traffic situation model?
Answer:
C
Explanation:
a parallel circuit because there is more than one path
Answer:
C) a parallel circuit because there is more than one path
Explanation:
EDGE 2022
What is total internal reflection?
Answer:
When a ray of light, passes from a denser to a rarer medium with the angle of incidence greater than the critical angle, the ray is reflected back into the same medium. This phenomenon is call total internal reflection.
The diagram shows the electric field near conducting sphere a which of the following statements is correct
Put these components from largest to smallest
1. comet
2. star
3. galaxy
4. nebula
5. planet
6. universe
Answer:
6, 3, 2, 5, 4, 1
Explanation:
Let's describe them from smallest to largest. In fact the size order is not exact as there are exceptions.
An asteroid is a rocky body which lies in the asteroid belt between Mars and Jupiter. They are typically quite small object. The largest asteroid Ceres has been reclassified as a dwarf planet.
A moon is typically a rocky body which is in orbit around a planet. Some moons such as our Moon are quite large and are typically bigger than asteroid. Some moons can actually be smaller than some asteroids.
A planet is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.
A star is what planets orbit around. It is the source of light and heat. Our Sun is a star which is many times bigger than all of the planets.
A solar system is a star and all of its planets, asteroids, comets and other bodies. It is significantly bigger than a star.
A galaxy, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core. Most galaxies have a supermassive black hole at their centres.
Galaxies also form clusters which are large scale structures.
The universe is everything. It contains billions of galaxies.
why is it not possible to make use of solar cells to meet all of our energy needs?why
Answer:
In the solar cells, the energy is obtained only during the day, when the Sun shines. .So, it increases the cost of using solar panels as the source of energy. So, the solar cell is not used to meet all our energy needs
hope this helps
have a good day :)
Explanation:
Answer:
In the solar cells, the energy is obtained only during the day, when the Sun shines. ... So, it increases the cost of using solar panels as the source of energy. So, the solar cell is not used to meet all our energy needs
Explanation:
n the solar cells, the solar panel convert solar energy into electricity, which is stored in storage battery. The storage battery give the direct current but all the appliances are working by the alternating current, so first of all direct current is converted into alternating current by any suitable appliances before it can be used to run various devices. So it increases the cost of using solar panels as the source of energy.
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An object moves through space with balanced forces acting on it. Which statement
best describes the speed and direction of the object as long as the forces acting on it
remain balanced?
A. The speed and direction of the object will both change.
B. The speed and direction of the object will remain constanti
C. The speed will change, but the direction will remain constant.
D. The speed will remain constant but the direction will change
Answer:
B
Explanation:
Newton's first law of motion states that every object will continue in a state of rest or uniform motion in a straight line unless a resultant force acts on it
balanced force means resultant force is 0N
this means that the speed will not change as it uniform and the direction will not change because it will continue at the same speed in a statight line and direction
sorry man, I think it was late
hope this helps
Which calculates the intensity of an electric field at a point where a 0.50 C charge experiences a force of 20. N?
Answer: [tex]40\ N/C[/tex]
Explanation:
Given
Magnitude of charge is [tex]q=0.5\ C[/tex]
Force experienced is [tex]F=20\ N[/tex]
Electric field intensity is the electrostatic force per unit charge
[tex]\therefore E=\dfrac{F}{q}\\\\\Rightarrow E=\dfrac{20}{0.50}\\\\\Rightarrow E=40\ N/C[/tex]
Thus, the electric field intensity is [tex]40\ N/C[/tex]