Answer: The correct statement is combining baking soda and vinegar will cause a chemical change.
Explanation:
A chemical reaction is defined as the reaction in which two or more chemical substances react to form two or more different chemical substances
A new substance (product) is formed in a chemical reaction when the bonds between the reactants are broken so that the new bonds between the products can be formed.
A physical process is defined as the process in which the physical state of matter takes place. Like, in the process of vaporization, a liquid state changes to the gaseous state without changing the composition of species.
When baking soda (Sodium bicarbonate) is reacted with vinegar (acetic acid), it leads to the formation of sodium acetate, water, and carbon dioxide.
A new compound is getting formed in this process which is denoted by the chemical equation:
[tex]NaHCO_3+CH_3COOH\rightarrow CH_3COONa+H_2O+CO_2[/tex]
Hence, the correct statement is combining baking soda and vinegar will cause a chemical change.
[Assume g = 10m/s?] If a girl is running along a straight road with a uniform velocity 1.5 m/s, find her acceleration. (Ans: 0) a.
Answer:
Her acceleration is 0 m/s²
Explanation:
We note that the motion of the girl is on a straight road, therefore;
The vertical acceleration (e.g. due to gravity, g) on the horizontal motion = 0
The horizontal acceleration, a = (Change in velocity, Δv)/(Change in time, Δt)
For uniform velocity, the change in velocity, Δv = 0
Therefore, fore any change in time, Δt, we have;
a = Δv/Δt
Her acceleration, a = 0/Δt = 0
Her acceleration, a = 0 m/s²
velocity after 2 seconds?
I assume the units are wrong: a = 2 m/s/s, not 2 m/s.
That means the each second, speed increases by 2 m/s. So, after 1 second, it’s going 2 m/s and after 2 seconds, it’s going 4 m/s. As long as the acceleration continued, each seconds would result in a gain of 2 m/s. You could just plug this into:
Vf = Vi + at.
Thus, Vi = 0 and Vf = 4 m/s.
The average speed during these 2 seconds is the average of initial and final speeds:
Vavg = (0 + 4)/2 = 2 m/s
The means that during these 2 seconds, on AVERAGE the bus was going 2 m each second. During the first second, it was going slower than 2 m/s and during the last second it was going faster than 2 m/s, but on AVERAGE, it was going 2 m each second. This is 2m + 2m = 4 m.
You could just plug the numbers into an equation:
X = Vi x t + 1/2 at^2 = 0 + 1/2 x 2 x 2^2 = 0 + 4 = 4 m
So, in conclusion:
the units needed to be corrected
Vf = 2 m/s (this is speed, which is the AMOUNT of velocity, since velocity requires a direction)
Distance = 4 m
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Una persona A tiene cierta cantidad de masa y una persona B tiene la mitad de masa de la persona A ¿como es el peso de B respecto al de A?
Answer:
El peso de la persona B es la mitad del peso de la persona A.
Explanation:
El peso de la persona B puede calcularse con la siguiente ecuación:
[tex] P_{B} = m_{B}g [/tex] (1)
En donde:
[tex]m_{B}[/tex]: es la masa de la persona B
g: es la gravedad
Dado que la persona B tiene la mitad de la masa de la persona A, tenemos:
[tex] m_{B} = \frac{m_{A}}{2} [/tex] (2)
En donde:
[tex]m_{A}[/tex]: es la masa de la persona A
Al introducir la ecuación (2) en (1) nos queda:
[tex] P_{B} = \frac{m_{A}}{2}g [/tex] (3)
Sabemos que el peso de la persona A está dado por:
[tex] P_{A} = m_{A}g [/tex] (4)
Entonces, al introducir la ecuación (4) en (3) tenemos:
[tex] P_{B} = \frac{P_{A}}{2} [/tex]
Por lo tanto, el peso de la persona B es la mitad del peso de la persona A.
Espero que te sea de utilidad!
A body of mass 0.1kg tied by a string is rotating a vertical circle with a speed of 10 m/s of radius a 1 m . what is the tension experienced by the string at the highest point
Answer:
The tension experienced in the string at the highest point is approximately 9.019 Newtons
Explanation:
The mass of the body tied to the string, m = 0.1 kg
The path of motion of the mass = Vertical circular motion
The speed of rotation of the stone, v = 10 m/s
The radius of the circular motion path, r = 1 m
The required information = The tension at the highest point, T
At the highest point, the tension, 'T', comprises of the centrifugal force, 'F', acting upwards in the string and the weight, 'W' of the body acting downwards
∴ T = F - W
[tex]The \ centrifugal \ force, \ F = \dfrac{m \times v^2}{r}[/tex]
Weight, W = m × g
Where;
g = The acceleration due to gravity ≈ 9.81 m/s²
Therefore;
The centrifugal force, F = 0.1 kg × (10 m/s)²/(1 m) = 10 N
The weight of the mass tied to the string, W ≈ 0.1 kg × 9.81 m/s² = 0.981 N
From which we have;
T = 10 N - 0.981 N = 9.019 N
The tension experienced in the string at the highest point ≈ 9.019 Newtons
explain the derivation of Newton's third and second law.
Answer:
Consider an isolated system of 2 bodies A & B. An isolated system means where there is no external force acting.Now let F be the force acting on B by A & F be the force acting on A by B.Now rate of change of momentum of A =dpA/dt and rate of change of momentum of B =d pB/dt
thus FAB=d pB/dt (i)......
FBA=dpA/dt (ii)........
Adding 1 and 2 we get FAB+FBA=d pB/dt+dpA/dt =d(pB+pA)/dt
But if no force is applied momentum will also be 0 because no velocity will be there so rate of change of momentum will also be 0
thus d(pA+pB)/dt=0
therefore FAB+FBA=0
or,FAB=-FBA
(3RD LAW OF MOTION)
A 500 kg sports car accelerates uniformly from rest reaching a speed of 30 m/s in 6 seconds .Find the distance travelled by the car in 6 second
Answer:
the distance traveled by the sports car is 90 m
Explanation:
Given;
mass of the sports car, m = 500 kg
initial velocity of the sports car, u = 0
final velocity of the sport car, v = 30 m/s
time of motion of the car, t = 6 s
The distance traveled by the sports car is calculated as;
[tex]s = (\frac{u+v}{2} )t\\\\s = (\frac{0+30}{2} ) \times 6\\\\s = 15 \times 6\\\\s = 90 \ m[/tex]
Therefore, the distance traveled by the sports car is 90 m
Two forces of magnitude 8N and 4N act at right angle to each other. The angle between the resultant and the 8N force is?
Answer:
Draw the vector triangle (head to tail)
Let 8 be adjacent and 4 the opposite side
tan theta = 4 / 8 = .5
theta = 26.6 deg
A small, uncharged metal sphere is placed near a larger, negatively charged sphere. Which diagram best represents the charge distribution on the smaller sphere
Answer:
Answer is option 3 or
Explanation:
Diagram 2 best represents the charge distribution on the smaller sphere. Therefore, the correct option is option 2.
What is charge?Charge is a physical attribute that causes matter in such an electromagnetic field to experience a force. Electric charges can be either positive or negative.
If there is no net electric charge, the substance is termed neutral or uncharged. Like charges repel each other (for example, two positive charges repelling two negative charges). Charges with opposing charges (positively and negatively) attract each other. Diagram 2 best represents the charge distribution on the smaller sphere.
Therefore, the correct option is option 2.
To know more about charge, here:
https://brainly.com/question/29166194
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How far did a crane lift a 65,000 N beam using 2,340,000J of work ?
Answer:
Distance = 36 meters
Explanation:
Given the following data;
Work done = 2,340,000 Joules
Force = 65,000 Newton
To find the distance covered by the crane;
Mathematically, work done is given by the formula;
[tex] Workdone = force * distance[/tex]
Substituting into the formula, we have;
[tex] 2340000 = 65000 * distance [/tex]
[tex] Distance = \frac{2340000}{65000}[/tex]
Distance = 36 meters
Explain how land breeze and sea breezes occur?
Explanation:
during the daytime the land gets hot and the hot air blows up to the sky and to feel the space the cool you are from the Sea blows to the land this phenomenon is called sea breeze similarly at night the hot air of sea goes up n cool air from land blows to sea which is called land breexe
please mark me the brainliest
(๑☯‿☯๑)
What is space expanding?
Answer:
The idea behind space expansion is that after the big bang, the universe started infinitely expanding. It's also called metric expansion. Stephen Hawking's A Brief History of Time goes further into detail on this.
what is force??????
⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
Answer:
A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects. ... Forces only exist as a result of an interaction.
Atoms of two different elements must have different
electrical charges.
numbers of neutrons.
atomic numbers.
energy levels
Answer:
Number of neautrons
Explanation:
Atoms from two different elements may have the same number of neutrons, but never the same number of protons. The number of protons is unique to the element and represents the atomic number. (sorcastic.org)
Answer:
C.
Explanation:
Si se tiene un gato hidráulico y se aplica una fuerza en el Area 1, se refleja otra fuerza en el Area 2, teniendo en cuenta la siguiente condición A1 < A2. Podemos afirmar que las fuerzas son:
Answer:
the forces are proportional to their areas of application
Explanation:
In a hydraulic jack, Pascal's principle is used, that the pressure in an incompressible liquid is the same at the same height, whereby the pressure on both sides of the jack are the same
P₁ = P₂
the pressure is defined by
P = F / A
we substitute
[tex]\frac{F_1}{A_1} = \frac{F_2}{A_2}[/tex]
F₂ = [tex]\frac{A_2}{A_1} \ F_1[/tex]
therefore the force is F₂> F₁
Therefore the forces are proportional to their areas of application
which of the following refers to stored energy that an object has due to its position?
Explanation:
Energy stored in an object due to its position is Potential Energy. Energy that a moving object has due to its motion is Kinetic Energy.
What is the sentence that we use to
remember how to convert metric
prefixes?
Answer:
The mnemonic I can use to memorize the metric prefixes in this order is: Gigantic Monsters Killed One Million Men Napping Peacefully. All right, so again, gigantic monsters killed one million men napping peacefully.
What 3 factors should be considered when designing a lighting rod?
Explanation:
A lightning rod (US, AUS) If lightning hits the structure:-
It will preferentially strike the rod and be conducted to ground through a wire.
Instead of passing through the structure, where it could start a fire or cause electrocution.
The parts of a lightning protection system are air terminals (lightning rods or strike) and all of the connectors and supports to complete the system.
Se conecta una pila de 1.5 volt a una luz led de color rojo, el led se enciende mientras esté conectado a la pila. De esta stuación se afirma que:
Answer:
Se requiere corriente para que brille la luz.
Explicación:
Una batería de 1,5 voltios está conectada a una luz LED roja, el LED se enciende siempre que esté conectado a la batería. A partir de esta situación se afirma que se requiere corriente para que brille la luz. La batería tiene corriente eléctrica almacenada que permite que la luz brille hasta que la corriente eléctrica esté presente en la batería. Esta batería se puede cargar durante un período de tiempo cuando está llena, se puede recuperar durante muchas horas.
Por una resistencia de 10 Ω fluyen 5A. ¿Cuál será la diferencia de potencial que se le debe aplicar a la resistencia?
Answer:
V = 50 volts
Explanation:
Given that,
Resistance, R = 10 ohms
Current, I = 5 A
We need to find the potential difference across the circuit. We know that,
V = IR
Put all the values,
V = 5 × 10
V = 50 volts
Hence, the potential difference is equal to 50 volts.
Assuming the time lapse indicated by the double arrow is 2s, what are the values of the
wave frequencies f1 and f2 in the figure? (Hint: Use the definition of frequency).
Answer:
f₁ = 1 Hz
f₂ = 0.75 Hz
Explanation:
The given time lapse between the two frequencies, t = 2 s
The frequency of a wave is the number of complete one cycles of the wave that pass through a given point in a given unit of time
The unit of frequency, 'f', is the Hertz, Hz
Therefore, frequency = Number of cycles/(Time)
The frequency of a wave, f = n/t
Where;
n = The number of completed cycles in a given time
The frequency of the first wave 1, f₁
The number of complete cycles by wave 1 in the 2 seconds, n = 2 cycles
The time, t = 2 seconds
The frequency of wave 1, f₁ = 2 cycles/(2 seconds) = 1 cycle/second = 1 Hz
The frequency of the second wave, wave 2, f₂
The number of complete cycles by wave 2 in the 2 seconds, n = 1 and half cycles = 1.5 cycles
The time, t = 2 seconds
The frequency of wave 2, f₂ = 1.5 cycles/(2 seconds) = 0.75 cycle/second = 0.75 Hz
Is the path of light visible in a Suspension? Give reason.
Answer:
Answer:It is due to tyndall effect that the path of a light ray passing through a suspension is visible. The particles in suspension scatter the beam of light making it clearly visible.
Answer:
it is due to the Tyndall effect so the path of light is visible in a suspension but in solution the path of light is not visible
Can someone help me with this one :") thanks
what simple machine is a Window Screen
AnswER PIZZA?
Explanation:
What is gravitational force??
Answer:
the force of attraction between all masses in the universe
Explanation:
Have a nice day :)
What is cerebellum ?
Un automóvil se anuncia con una potencia de 600 hp y cuando se prueba en una subida pesada, alcanza una velocidad máxima de 45 km/h ¿cuál es la fuerza máxima que le imprime el motor?
Answer:
The force is 35808 N.
Explanation:
Power, P = 600 hp = 600 x 746 W = 447600 W
speed, v = 45 km/h = 12.5 m/s
Let the force is F.
P = F v
447600 = F x 12.5
F = 35808 N
in The unit of power is a
derived unite
The unit of power is
a derived unit be con
CAY
Answer:
Watts
Explanation:
The SI unit for power is the watt (W), where 1 watt equals 1 joule/second (1 W=1 J/s).
calcula el peso de una persona que viaja a la luna cuya masa es de 105 kg
Answer:
W = 170.62 N
Explanation:
The given question is, "calculate the weight of a person traveling to the moon whose mass is 105 kg".
We need to find the weight of a person on the Moon.
The weight of an object is given by :
W = mg
Where
g is acceleration due to gravity on Moon, g = 1.625 m/s2
W = 105 kg × 1.625 m/s²
W = 170.62 N
Hence, the weight of the person is 170.62 N.
Una pelota q rodaba a 93,6 dm/s, luego de 14,4 segundos se detiene.¿cual fue el valor de su aceleracion?
Answer:
-6,5 ms ^ 2
Explanation:
Dado que;
Velocidad inicial (u) = 93,6 m / s
Velocidad final (v) = 0 m / s
aceleración (a) =?
tiempo empleado (t) = 14,4 segundos
De;
v = u + en
0 = 93,6 + 14,4a
a = -93,6 / 14,4
a = -6,5 ms ^ 2
For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.50-mm-long, 0.460 mg flea can reach a height of 15.0 cm in a single leap. a) Calculate the kinetic energy per kilogram of mass. b) If a 79.0 kg, 2.00-m-tall human could jump to the same height compared with his length as the flea jumps compared with its length, how high could the human jump
Answer:
1.47 J/kg
120 m
Explanation:
The maximum height it can jump in a single leap 15 cm, = 0.15 m
to get the kinetic energy per kg of mass, we need to find the takeoff speed. The take off speed can be calculated by using the formula
v = [tex]\sqrt{2gh}[/tex]
where h = 0.15
v = [tex]\sqrt{2 * 9.81 * 0.15}[/tex]
v = [tex]\sqrt{2.94}[/tex]
v = 1.715 m/s
energy per kg of mass =
1/2 * (1.715) = 1.47 J/Kg
TJe height a human can jump when compared to the flea is
2 m/2.5 mm * 15 cm =
2/0.0025 *0.15 =
800 * 0.15 = 120 m
what part of an electric motor transforms electrical energy into mechanical energy
Answer:
Explanation: a
