Please help me, I beg you
Answer:
40g
Explanation:
Solubility of Copper sulfate at 90°=60g
Solubility of potassium bromide at 90°=100g
100g-60g=40g
When solar energy is converted to thermal energy, how is the thermal energy used? Check all that apply.
to provide air conditioning
to cool refrigerators
to heat spaces in buildings
to heat water
Answer:
to heat spaces in buildingss
Explanation:
Alfred is studying a substance that is made out of only one element. This means that
Answer: A pure substance is something that occurs in nature. An element is made up of one type of atom only and cannot be split further. A compound has the combined properties of the elements from which it is made. Atoms show the macro properties of an element.
Imagine driving down the road and you suddenly doubled your velocity. What then happens to your overall kinetic energy?
it is halved
it remains unaffected
it is doubled
it is quadrupled
2 kg
T2
5 kg
2.1.1 State Newton's Second Law of Motion in words.
.1.2 Draw a labelled free body diagram for the 2 kg mass.
1.3 Determine the magnitude of the tension force T2.
1.4 Calculate the magnitude of the normal force exerted on the 2 kg mass,
Answer:
2500 and kg its is very easy do with method
what is virtual image
Answer:
Virtual images are images that are formed in locations where light does not actually reach. Light does not actually pass through the location on the other side of the mirror; it only appears to an observer as though the light is coming from this location.
Explanation:
Un tren emite un sonido a 480hz determina la frecuencia que percibe el observador cuando el observador se aleja a 12m/s del tren que ha quedado en reposo velocidad del sonido en el aire 340m/s
Answer:
La frecuencia que percibe el observador es 463 Hz.
Explanation:
El efecto Doppler se define como el cambio de frecuencia aparente de una onda producida por el movimiento relativo de la fuente respecto a su observador. En otras palabras, este efecto es el cambio en la frecuencia percibida de cualquier movimiento ondulatorio cuando el emisor y el receptor, u observador, se desplazan uno respecto a otro.
La siguiente expresión se considera el caso general del efecto Doppler:
[tex]f'=f*\frac{v+-vR}{v-+vE}[/tex]
Donde:
f’, f: Frecuencia percibida por el receptor y frecuencia emitida por el emisor respectivamente. Su unidad de medida en el Sistema Internacional (S.I.) es el Hertz (Hz), que es la unidad inversa del segundo (1 Hz = 1 s-1) v: Velocidad de propagación de la onda en el medio. Es constante y depende de las características del medio. En este caso se considera que la velocidad del sonido en el aire es de 340 m/s vR, vE: Velocidad del receptor y del emisor respectivamente. Su unidad de medida en el S.I. es el m/s ±, ∓:Utilizaremos el signo +:
En el numerador si el receptor se acerca al emisor
En el denominador si el emisor se aleja del receptor
Utilizaremos el signo -:
En el numerador si el receptor se aleja del emisor
En el denominador si el emisor se acerca al receptor
En este caso:
f= 480 Hzv= 340 m/svR= 12 m/s (el receptor es el observador)vE=0 (el emisor es el tren, que se encuentra en reposo)Y como el receptor se aleja del emisor, la expresión del efecto Doppler queda determinada como:
[tex]f'=480 Hz*\frac{340 m/s-12 m/s}{340 m/s-+0 m/s}[/tex]
Resolviendo se obtiene:
[tex]f'=480 Hz*\frac{340 m/s-12 m/s}{340 m/s}[/tex]
[tex]f'=480 Hz*\frac{328 m/s}{340 m/s}[/tex]
f'= 463 Hz
La frecuencia que percibe el observador es 463 Hz.
...he...
2- A diver on Saturn's moon Titan is 50 m below the surface of a lake of liquid
methane.
(a) what is the increase in pressure on him due to his depth in the methane? The
density of liquid is 420 kg/m3. the gravitational field on Titan is 1.4 N/kg.
[2]
(6) we are told that the pressure of the atmosphere on Titan is 1600 mbar. What is
the total pressure on the diver (in kPa)
[2]
There is concern that extra additives in detergents can
have negative health and environmental impacts. Is
it wise to use detergents containing these additives?
Answer:
Look below.
Explanation:
If additives are having negative effects on health and the environment, it would be wise to not use detergents containing these additives. These additives could threaten living things such as humans and animals.
There is concern that extra additives in detergents can have negative health and environmental impacts, then it would be very unwise to use detergents containing these additives
What is pollution?It can be defined as the origination of the contaminant substance that poisonous or harmful to our natural environment.
There are several types of pollution that exist in our nature depending on the state and composition of the contaminant, for example, water pollution can exist due to the eutrophication process.
It would be quite unwise to use surfactants that include these additional ingredients since there is fear that they might have a harmful influence on your well-being and the environment.
To learn more about pollution from here, refer to the link;
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Which stretch focuses on stretching the glutes and hamstrings while laying on your back?
Question 4 options:
Knee to hip
Bent knee
Knee to Chest
Chest flies
tyyyyyyyy
Answer:
knee to chest
Explanation:
I took the test
Answer:
C. Knee to chest.
whenever velocity increases the kinetic energy will ?
Answer:
It will increase.
Explanation:
Because kinetic energy is proportional to the square of the velocity, when velocity is doubled, kinetic energy is quadrupled. Kinetic energy K=mv^2/2
In which situation is there NO work being done?
Answer:
d
Explanation:
What type of energy is energy in the form of motion.
Answer:
the answer is kinetic energy
What is the correct reason for blinking / flickering of stars? Explain it.
A) The blasts in the stars.
B) Absorption of star light by the atmosphere.
C) Motion of the stars.
D) Changing refractive index of gases in the atmosphere.
plz suggest me a answer which can give me 3 marks
Answer:
d. changing refractive index of gases in the atmosphere
Explanation:
light from a star passes through the atmosphere to reach our eyes. however, the layers of gases in the atmosphere are in constant motion, so the light gets bent and appears to be flickering.
i hope this helps! :D
Please help Solve! I need help!
Question:
Jermaine runs exactly 2 laps around a 400-meter track. What is the displacement?
Multiple choice answers (I need help I don't understand I don't know what the answer is PLEASE HELP ME):
a. 200
b. 800
c. 400
d. 0
D
Explanation
Given,
Distance covered in 1 lap = 400m
= Distance covered in 2 laps = 400 × 2
=800m
If Jermaine runs 2 whole laps, she comes back to her starting point.
So the answer is 0m
a = F/m is an explanation of
in  Physics
Answer:
The equation a=F/m or the acceleration is equal to the net force of an object divided by that object's mass, is an equation derived and explained by Sir Issac Newton's second law of motion. Newton's second law of motion states that the force of an object is equal to the mass times the acceleration of that object.
How is blue colour made?
Answer:
In terms of the light spectrum, blue is a primary color, which means that it is one of the base colors that exist in the universe and it cannot be created by combining different colors together. The primary pigment colors are cyan, magenta, and yellow. Cyan absorbs red, yellow absorbs blue, and magenta absorbs green.
Explanation:
Hope this helped Mark BRAINLEST!!!
Q11) If you were standing at the top of a building and you dropped a rock.
you noticed that the rock took 5.2 s to hit the ground. Find the total
distance the rock traveled and the speed when the rock hit the ground.
Answer:
Part A
The distance travel by the rock is approximately 132.496 m
Part B
The speed when the rock hits the ground is approximately 50.96 m/s
Explanation:
Part A
The question is focused on the kinetics equation of a free falling object
The given parameter is the time it takes the rock to hit the ground, t = 5.2 s
For an object in free fall, we have;
h = 1/2·g·t²
Where;
h = The height from which the object is dropped
g = The acceleration due to gravity ≈ 9.8 m/s²
t = The time taken to travel the distance, h = 5.2 s
∴ h = 1/2 × 9.8 m/s² × (5.2 s)² ≈ 132.496 m
The distance travel by the rock, h ≈ 132.496 m
Part B
The speed, 'v', when the rock hits the ground, is given by the following kinematic equation,
v = g·t
∴ v = 9.8 m/s² × 5.2 s = 50.96 m/s
The speed when the rock hits the ground, v ≈ 50.96 m/s.
Using the correct IUPAC nomenclature, what is the correct name, formula,
and classification of a compound that contains two nitrogen atoms and one
oxygen atom?
O A. Mononitrogen dioxide, N20, covalent compound.
B. Nitrogen dioxide, NO2, ionic compound.
O C. Dinitrogen monoxide, N20, covalent compound.
D. Nitrogen oxide, No, ionic compound.
Answer: C is right
Explanation:
N and O are no-metals and forms covalent bonds.
Usually they need a. Prefix whic tells number of atoms in compound
HELP ASAP THANKS
What happens to the mass of an object when the parts are rearranged?
Answer:
The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.
Hope it helps!!!
Answer:
their will be no change in this..
The law of conservation of mass is a fundamental principle of physics. According to this law, matter can be neither created nor destroyed. In other words, the mass of an object or collection of objects never changes, no matter how the parts are rearranged.
If a microwave oven is rated at 2400 watts and it is connected at a 120 volt
outlet, how much current does it use?
A. 2280 amps
B. 0.05 amps
C. 20 amps
D. 288,000 amps
Please answer this ASAP
Answer:
c. 20 amps.
just divide the watts by the volts
Define one solar day
Answer:
the time between successive meridian transits of the sum at a particular place
Ocean breezes are due to which method of heat transfer?
A. conduction
B. convection
C. greenhouse gases
D. radiation
E. geothermal energy
Ocean breezes are primarily due to convection, which is the transfer of heat through the movement of fluids or gases. The correct option is B.
What is convection?Convection is a method of heat transfer that occurs in fluids (liquids and gases) and involves the movement of material carrying thermal energy. In convection, heat is transferred by the movement of hot fluid from one place to another, which then causes the transfer of heat from the hot fluid to the cooler fluid or surface it comes into contact with.
Convection can occur in two ways:
Natural convection: It occurs due to the density differences caused by temperature variations within a fluid. When a fluid is heated, its density decreases, making it lighter and causing it to rise. As it rises, it cools, becomes denser and falls back down, creating a cycle that is known as a convection current.
Forced convection: In this type of convection, a fluid is forced to flow over a surface or through a channel, by an external agent like a fan or pump. The forced flow enhances the rate of heat transfer from the surface or through the channel, as compared to natural convection, where the fluid flow is driven only by buoyancy forces.
Convection is a very important process for heat transfer in many natural and industrial applications, including heating and cooling systems, meteorology, oceanography, and more.
Here in the Question,
Ocean breezes are primarily due to convection, which is the transfer of heat through the movement of fluids or gases. As the sun heats up the surface of the ocean, the air above it also heats up and rises. This creates a low pressure area that draws in cooler air from over the land, resulting in a breeze that blows from the ocean towards the shore. This is why sea breezes are generally felt during the day, when the land is warmer than the sea, and why they tend to die down at night, when the opposite occurs.
Therefore, The correct answer is B i.e convection.
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Se calienta para templar y endurecer, una llave española de acero de 200 gramos, elevando su temperatura hasta los 550°C y se introduce dentro de un recipiente de aluminio de 250 gramos de masa que contiene 220 gramos de agua. A 18°C. Determinar la temperatura final, cuando se alcanza el equilibrio térmico. Considere El CeHierro= 0.499cal/g°C; CeAluminio= 0.217cal/g°C; Ce agua=1cal/g°C
Answer:
La temperatura final es de aproximadamente 159,94°C
Explanation:
Los parámetros dados son;
La masa de la llave española de acero, m₁ = 200 gramos
La temperatura de la llave, T₁ = 550 ° C
La masa del recipiente de aluminio que contiene agua, m₂ = 250 gramos
La masa del agua en el recipiente de aluminio, m₃ = 220 gramos
La capacidad calorífica específica del hierro, [tex]C_{planchar}[/tex], c₁ = 0.499 ca/(g·°C)
La capacidad calorífica específica del aluminio, [tex]C_{Aluminio}[/tex], c₂ = 0.217 cal/(g·°C)
La capacidad calorífica específica del agua, [tex]C_{Agua}[/tex], c₃= 1 cal/(g·°C)
En equilibrio térmico, tenemos;
m₁·c₁·(T₁ - T) = m₂·c₂·(T -T₂) + m₃·c₃·(T - T₂)
Conectando los valores, da;
200 × 0.499 × (550 - T) = 250 × 0.217 × (T -18) + 220 × 1 × (T - 18)
Simplificando, usando una calculadora gráfica, obtenemos;
[tex]\dfrac{274450-499\cdot T}{5} = \dfrac{1097 \cdot T-19746}{4}[/tex]
De también encontramos 'T' al convertirlo en el tema de la ecuación anterior aún usando una calculadora gráfica;
T = 1196530/7481 °C ≈ 159.94°C
La temperatura final,T ≈ 159.94°C.
The final temperature, when thermal equilibrium is reached is 144°C.
Given the following data:
Mass of key = 200 gramsFinal temperature of key = 550°CMass of aluminum = 250 gramsMass of water = 220 gramsInitial temperature of water = 18°CSpecific heat capacity of key = 0.499 cal/g°CSpecific heat capacity of aluminum = 0.217 cal/g°CSpecific heat capacity of water = 1 cal/g°CTo determine the final temperature, when thermal equilibrium is reached:
Mathematically, heat capacity or quantity of heat is given by the formula;
[tex]Q = mc\theta[/tex]
Where:
Q represents the quantity of heat.m represents the mass of an object.c represents the specific heat capacity.∅ represents the change in temperature.At an equilibrium state, the quantity of heat for the three substances is given by the equation:
[tex]M_kC_k(\theta_2 - \theta_1) = M_aC_a(\theta_2 - \theta_1) + M_wC_w(\theta_2 - \theta_1)\\\\200 \times 0.499 \times (500 - \theta_2) = 250 \times 0.217 \times (\theta_2 - 18) + 220 \times 1 \times (\theta_2 - 18)\\\\99.8(500 - \theta_2) = 54.25(\theta_2 - 18) + 220(\theta_2 - 18)\\\\49900 -99.8\theta_2 = 54.25\theta_2 - 976.5 + 220\theta_2 - 3960\\\\220\theta_2 + 99.8\theta_2 + 54.25\theta_2 = 49900 + 3960\\\\374.05\theta_2 = 53860\\\\\theta_2 = \frac{53860}{374.05}[/tex]
Final temperature, [tex]\theta_2[/tex] = 143.99 ≈ 144°C
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A player prefers to make high passes that lift the puck above the ice. Which stick should the
player choose?
Answer:
i dont know
Explanation:
hello
A boom is to be dropped from moving helicopter on the ground. Explain how can it hut the target ?
Answer:
A bomb that is dropped from a moving helicopter doesn't fall directly downward rather it follows the parabolic path as it were thrown horizontally from a height with certain initial velocity. Therefore, the bomb should be dropped from farther distance equal to the horizontal range before the helicopter reaches above the target.
What part of the atom takes up most of the atoms space?
The atom
The electron cloud
The nucleus
The bottom part
Answer:
The electrons
Explanation:
on
Draw
3. The weight of a body varies from location to location. Where would the weight of the
body be least
On the moon
At sea level on earth
On top of Mount Everest
In space
4. We meet many different types of force every day. Some of these are shown in the list
below. However, one of these is NOT a force. Which one is it?
A
Speed
B
Push
C
Pull
Friction
Answer:
it's C a pull friction
Explanation:
because it's all said in the explained
If a special type of ice has a specific heat capacity of 2060 J/kg K. How
much heat must be absorbed by 2.6 kg of ice at -27.00 C to raise it up to
0.00 C, before any melting takes place?
A. 140,000 J
B. 290,000 J
C. 56,000 J
D. None of the above
Answer:
Q = 144612 Joules.
Explanation:
Given the following data;
Mass = 2.6 kg
Initial temperature = -27°C to Kelvin = 273 + (-27) = 246K
Final temperature = 0°C to Kelvin = 273K
Specific heat capacity = 2060 J/kgK.
To find the quantity of heat absorbed;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt = T2 - T1
dt = 273 - 246
dt = 27 K
Substituting the values into the equation, we have;
[tex] Q = 2.6*2060*27[/tex]
Q = 144612 Joules.
__________ is the
process by which populations change over
time.
Evolution, is a process that results in changes in the genetic material of a population over time.
