Answer:
[tex]9.0\:\text{J}[/tex]
Explanation:
The work of an object is given by [tex]W=F\Delta x[/tex], where [tex]F[/tex] is force applied and [tex]\Delta x[/tex] is displacement.
Substituting given values, we have [tex]W=5.0\cdot 1.8=\boxed{9.0\:\text{J}}[/tex]
Answer:
I have done 9.0 Joule(J) if I raise 5.0 N weight 1.8 m above the ground.
Why the impact of the loaded truck on a body coming it’s the way is very large even if the
truck is moving slowly
Answer: due to large momentum
Explanation:
The impact of the loaded truck is very large on a body coming in its way because of the momentum associated with truck. Truck has a huge mass which is responsible for its large momentum.
Momentum is the product of mass and velocity. Even though the velocity of truck is low but it's mass compensates for it to give large momentum. This large momentum can overwhelm any small body at rest or coming in its way.
Question 33
Why can human ears hear dolphins' vocalizations while under the water but cannot hear them well on land?
A
The waves in the water travel faster and at a higher frequency than they travel on land.
B
The waves in the water travel faster and at a lower frequency than they travel on land.
C
The waves in the water travel slower and at a higher frequency than they travel on land.
D
The waves in the water travel slower and at a lower frequency than they travel on land.
Answer:
A. The waves in the water travel faster and at a higher frequency than they travel on land.
Explanation:
The main reason why human ears can hear dolphins' vocalizations while under the water but cannot hear them well on land is because water is denser than air and air particles travel faster in denser particles.
Denser particles also ensures that the frequency of the waves move faster which in turn produces a faster and louder result.
A block of copper with mass 0.500 kg is heated to 400. degrees Celsius from 290. degrees Celsius. The specific heat capacity of copper is 387 J/ (kg*C°). The heat absorbed by the copper block is
7.74 E5 J
7.74 E4 J
5.61 E4 J
2.13 E5 J
2.13 E4 J
The heat absorbed can be calculated using calorimetric equation. The heat absorbed by the copper block of mass 0.500 kg for the temperature difference of 290 to 400 degree Celsius is 2.13 E4 J.
What is calorimetric equation?Calorimetry is an analytical tool used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the mass m, temperature difference ΔT and specific heat capacity c is given by:
q = m c ΔT .
Given,
m = 0.500 kg
c = 387 J/(kg °C )
ΔT = 400 - 290 °C = 110°C.
Then, the heat energy absorbed by the copper block is ;
q = 0.50 kg × 387 J/(kg °C ) × 110°C
= 2.13 E4 J
Therefore, option E is correct.
Find more on calorimetry:
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What are the similarities and differences between hydraulic and pneumatic systems?
Answer:
Pneumatics use easily compressible gas like air or pure gas. Meanwhile, hydraulics utilize relatively-incompressible liquid media like mineral oil, ethylene glycol, water, synthetic types, or high-temperature fire-resistant fluids to make power transmission possible.
Explanation:
hope this helps
What must happen for salt and water to form a solution?
O A. The salt and the water must combine to form a new substance.
B. The salt and the water must combine chemically.
C. The water must displace the salt.
O D. The salt must dissolve in the water.
3. Identify which of the following probably would not have an effect on the climate of a region:
a. the region is next to a mountain range
b. the region is on the equator
c. a thunderstorm just blew through the region
d. the region is next to the Atlantic Ocean
Is water still part of the cycle when it is underground? Explain.
Answer:
hi
Explanation:
Given the electron configuration for the following neutral atoms A and B below:
Which statement is false?
(a) energy is required to change I to II
(b) I and II represent different elements
(c) I is the electron configuration of sodium
(d) less energy is required
to remove one electron from II than from I
A un cuerpo de 4kg que está en reposo sobre la superficie de la tierra, se aplica durante 8seg una fuerza de 60N dirigida verticalmente hacia arriba. Calcule la altura máxima que alcanza el cuerpo.
Answer:
[tex] y_{t} = 253.94 m [/tex]
Explanation:
Para resolver este problema debemos contemplar dos tramos.
En el primer tramo, la fuerza aplicada impulsa al cuerpo a subir una altura dada debido a la aceleración que genera esa fuerza.
[tex] \Sigma F = ma [/tex]
[tex] F - P = ma [/tex]
[tex] F - mg = ma [/tex]
En donde:
F: es la fuerza aplicada = 60 N
P: es el peso del cuerpo = mg
m: es la masa del cuerpo = 4 kg
g: es la aceleración debido a la gravedad = 9.81 m/s²
a: es la aceleración
Entonces, la aceleración generada por la fuerza aplicada es:
[tex] a = \frac{F - mg}{m} = \frac{60 N - 4kg*9.81 m/s^{2}}{4 kg} = 5.19 m/s^{2} [/tex]
Ahora, debemos calcular la altura recorrida mientras el cuerpo está acelerado hacia arriba:
[tex] y_{{1}} = y_{0} + v_{0}t + \frac{1}{2}at^{2} [/tex]
En donde:
[tex] y_{1}[/tex]: es la altura final del tramo 1 =? [tex] y_{0}[/tex]: es la altura inicial = 0
[tex] v_{0}[/tex]: es la velocidad inicial = 0 (parte del reposo)
t: es el tiempo = 8 s
[tex] y_{1} = 0 + 0 + \frac{1}{2}5.19 m/s^{2}*(8 s)^{2} = 166.08 m [/tex]
Por lo tanto, mientras el cuerpo está acelerado (durante los 8 s) recorre 166.08 metros.
Ahora, en el segundo tramo el cuerpo sigue subiendo hasta alcanzar una altura máxima para luego comenzar a descender. Podemos usar la siguiente ecuación para calcular la altura recorrida.
[tex] v_{f}^{2} = v_{0}^{2} - 2gy_{2} [/tex]
En donde:
[tex] v_{f}[/tex]: es la velocidad final = 0 (en la altura máxima)
[tex] v_{0}[/tex]: es la velocidad inicial
Primero debemos encontrar la velocidad inicial en el segundo tramo, que es igual a la velocidad final del primer tramo:
[tex] v_{f} = \sqrt{v_{0} + 2ay_{1}} = \sqrt{0 + 2*5.19 m/s^{2}*166.08 m} = 41.52 m/s [/tex]
Entonces, la altura recorrida en el segundo tramo es:
[tex] y_{2} = \frac{v_{0}^{2} - v_{f}^{2}}{2g} = \frac{(41.52 m/s)^{2} - 0}{2*9.81 m/s^{2}} = 87.86 m [/tex]
Finalmente, la altura máxima es:
[tex]y_{t} = y_{1} + y_{2} = 166.08 m + 87.86 m = 253.94 m[/tex]
Espero que te sea de utilidad!
It’s IT but I really need the answer
The answer to the question is logic
An electric field of 6.1x 10^5 N/C is directed along a charge 2.9 x 10^-19 C. What
is the electric force on the charge?
Answer:
Electric field is a function 1/r^2
Explanation:
the diagram below represents the orbits of earth, comet temple-tuttle, and planet x, another planet in out solar system. arrows on each orbit represent the direction of movement. which objects orbit would have and eccentricity close to 1?
Answer:
the most elliptical orbit is that of COMETA
Explanation:
The eccentricity of a curve in defined as the ratio between lacia to the focus, called c and the value of the axis greater than
ε = c / a
if we use Pythagoras' theorem
c = [tex]\sqrt{a^2 - b^2}[/tex]
substituting
ε = [tex]\sqrt{1 - (b/a)^2 }[/tex]
if ε = 0 we have a circumference
In the diagram presented the orbit of the comet is an ellipse a> b
ε=[tex]\sqrt{1- x} \\ x = (\frac{b}{a} )^2[/tex]
if we expand in series
ε = 1 - x/2
ε= [tex]1 - \frac{1}{2} \ (\frac{ b}{a} )^2[/tex]
if we neglect the non-linear terms
ε = 1
Earth's orbit is a small ellipse
b / a = 149 10⁶ / 151 10⁶
b / a = 0.98675
ε = [tex]\sqrt{1- 0.98675^2}[/tex]
ε = 0.16
a very small ellipse
Planet X, despite not having data, it seems that the sun is in the scepter of the orbit, so b = a
therefore both the semi-axes of the curve
e = a / b
Consequently, the most elliptical orbit is that of COMETA.
As you move from left to right across the electromagnetic spectrum in the image, the wavelength becomes?
A.) Longer
B.) Lower
C.) Shorter
D.) Taller
Answer:
It is A.) Longer
Explanation:
The shortest wavelength is on the (high energy)left side of the diagram with gamma rays. The longest wavelength waves are radio, around 3 meters. so, as you progress, the wavelengths get longer.
ASAP Question 3 of 10
In the diagram shown below, the blue light ray represents a ray of light
incident on a boundary between media. The diagram represents:
D
O A. indention
B. diffraction
C. reflection.
O D. refraction
Answer:
the answer is refraction, btw could u
say which grades question this is
Un repartidor de comida rápida entrega una pizza a una casa que se encuentra a 20 km de distancia y se demora 20 minutos en llegar. De vuelta a la pizzería vuelve más relajado y se demora media hora. ¿Cuál fue su velocidad media en el trayecto completo?
Answer:
La velocidad media en el trayecto completo es 0.8 [tex]\frac{km}{minutos}[/tex].
Explanation:
La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello.
En otras palabras, la velocidad es una magnitud que relaciona el cambio de posición (o desplazamiento) con el tiempo.
La velocidad media resulta del cociente entre el desplazamiento seguido por un móvil y el tiempo transcurrido que se emplea para realizar dicho desplazamiento:
[tex]velocidad=\frac{desplazamiento}{tiempo}[/tex]
En este caso, un repartidor de comida rápida entrega una pizza a una casa que se encuentra a 20 km de distancia y se demora 20 minutos en llegar. De vuelta a la pizzería vuelve más relajado y se demora media hora. Entonces, el desplazamiento total entre la pizzería y la casa será 40 km, considerando que se dirige a la casa y vuelve a la pizzería.
Por otro lado, el tiempo total será el tiempo en que se dirige a la casa y luego vuelve a la pizzería, es decir 20 minutos + 30 minutos= 50 minutos.
Entonces:
[tex]velocidad=\frac{40 km}{50 minutos}[/tex]
Resolviendo:
velocidad= 0.8 [tex]\frac{km}{minutos}[/tex]
La velocidad media en el trayecto completo es 0.8 [tex]\frac{km}{minutos}[/tex].
Which one of these are considered as mechanical energy?
Chemical energy
Nuclear energy
Thermal energy
Radiant energy
Electrical energy
gravitational potential energy
rotational kinetic energy
translational kinetic energy
elastic potential energy
Answer:
gravitational potential energy
Explanation: Hope it helps you:)))
have a good day
La contaminación acústica de acuerdo a la organización mundial de la salud medido en decibeles corresponde
Answer: Si es mayor a 65 dB es considerado dañino.
Explanation: Se considera ruido a todo aquel que supera los 75 dB o torturante aquel mayor a 120 dB según la OMS.
diferencias que existen entre la marcha cuando caminamos, corremos sin balón y corremos con balón
Answer:
La principal diferencia que existe entre la marcha cuando caminamos y cuando corremos, sea con o sin el balón, es la velocidad: al caminar, la velocidad es mucho menor que al correr, y a su vez, correr sin el balón da la posibilidad de correr mucho más rápidamente, debido a que no se requiere una coordinación entre los pasos y el control del balón.
Por otra parte, además de la velocidad, el ritmo cardiaco que se adquiere al caminar es mucho mas bajo que al correr, donde por causa del esfuerzo se aceleran las pulsaciones, aumentando la frecuencia cardiaca y, por lo tanto, la exigencia cardiovascular.
The information shows the masses after the compounds are balanced.
2MgO + 2Cl2 → 2MgCl2 + O2
85g + 156g → 188g + ?
If the following materials are used during the reaction of magnesium, oxygen, and chlorine, what mass oxygen would we expect to see after the reaction and why?
A. 53g of O2, because all mass must be conserved.
B. 241g of O2, because all mass must be conserved.
C. 42.5g of O2, because all mass must be conserved, it would be half of the compound MgO in the products.
D. 106g of O2, because all mass must be conserved, it would be double the compound MgO in the products.
Pls answer correctly I really need a good grade on this.
Answer:
The information shows the masses after the compounds are balanced.
2MgO + 2Cl2 → 2MgCl2 + O2
85g + 156g → 188g + 53g
53gas total mass in reactant is equal to product.
A.
53g of O2, because all mass must be conserved.
How much potassium nitrate, KNO3, would completely dissolve in 100g of water at 40℃?
A. 28 grams
B. 108 grams
C. 45 grams
D. 65 grams
Pls help, I'll mark brainiest I really need a good grade, so pls answer correctly
How much potassium nitrate, KNO3, would completely dissolve in 100g of water at 40℃?
A. 28 grams
B. 108 grams
C. 45 grams
D. 65 grams
In a chemical reaction, the substances that interact are called the reactants.
A. True
B. False
Answer:
true
Explanation:
In a chemical reaction, the atoms and molecules that interact with each other are called reactants. In a chemical reaction, the atoms and molecules produced by the reaction are called products. In a chemical reaction, only the atoms present in the reactants can end up in the products.
A 15.0 kg box is hung from the ceiling by one rope. What is the tension on the rope?
Tension = Mass * Gravity
Tension = 15 * 9.81 = 147.15
0.125 C of charge flow out of a
5.00 V battery in 6.30 s. How
much resistance is attached to the
battery?
(Hint: What is the definition of current?)
(Unit = Ohm)
Answer:
Resistance = 252.53 Ohms
Explanation:
Given the following data;
Charge = 0.125 C
Voltage = 5 V
Time = 6.3 seconds
To find the resistance;
First of all, we would determine the current flowing through the battery;
Quantity of charge, Q = current * time
0.125 = current * 6.3
Current = 0.125/6.3
Current = 0.0198 A
Next, we find the resistance;
Resistance = voltage/current
Resistance = 5/0.0198
Resistance = 252.53 Ohms
Why is the sky blue in colour?
[tex] \huge\mathrm{Answer࿐}[/tex]
Our Atmosphere is full of freely subtended particles, and when light from sun strikes the particles then scattering occurs, in which blue colour is most scattered and hence causing Sky to appear blue .
Hope it helps !!
_____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
How would mass determine if an egg will crack or not and why?
Answer:
the force of the egg striking the floor or ground is greater than the force that the egg shell can exert on itself to keep its shape, the egg will break. Some eggs are stronger than others, depending on how thick the shell is.
Explanation:
credits :- http science line
what is instanteanous velocity of the bat at t = 5 s
A table exerts a force on the ground. The ground exerts
A. no force on the table
B. a greater and opposite force on the table
C. an equal and opposite force on the table
D. a lesser an opposite force on the table
Answer:
hey from what I know the answer is C
Explanation:
When a book is kept on a table , weight (gravitational force) of book acts on table vertically downwards and as a reaction of weight , table also exerts an equal and opposite ( upward) force on book .
Which path would the laser take when entering the water from air?
brown or black
When a traffic light turns from red to green, it takes much more force and time for a large truck to get going than it does a small, compact car. This is an example of which law of motion?
Answer:
First Law of Motion.
Explanation:
Inertia can be defined as the tendency of an object or a body to continue in its state of motion or remain at rest unless acted upon by an external force.
In physics, Sir Isaac Newton's First Law of Motion is known as Law of Inertia and it states that, an object or a physical body in motion will continue in its state of motion at continuous velocity (the same speed and direction) or, if at rest, will remain at rest unless acted upon by an external force.
The inertia of a physical object such as a truck is greatly dependent or influenced by its mass; the higher the quantity of matter in a truck, the greater will be its tendency to continuously remain at rest.
Hence, it would take much more force and time for a large truck to get going when the traffic light turns green than it does for a small, compact car. This is an example of the first law of motion.