Answer: A
the answer is a
Answer:the answer is a according to diverse exponential formula i got it right on my test
Explanation:
When transferring electric charge, an object becomes positive when it _________.
A.
gains protons
B.
loses protons
C.
loses electrons
D.
gains electrons
Answer:
C.
Explanation:
Swapping electrical charges will always have to do with electrons, so A & B can be eliminated easily.
Electrons will be the ones transferring over to the new object. Electrons are naturally negatively charged, so anything that gains electrons will become negatively charged themselves. Whereas if they lose electrons, they will become positively charged.
It's worth noting that protons and electrons have the same exact numerical charge, but they are both opposites. Electrons are negative, and protons are positive. Neutrons on the other hand have no charge (hence the "neutral" root in its name).
Enumerar 5 actividades en casa o en el trabajo en la que usualmente se mantenga una postura corporal incorrecta
Answer:
Existen cinco actividades en las que se mantiene una postura corporal incorrecta:
1) Sentarse en una silla.
2) Agacharse y levantar una objeto del piso, especialmente cuando es pesado.
3) Sentarse en un escritorio, especialmente frente a una computadora.
4) Llevar una mochila, especialmente si está sobrecargada.
5) Dormir sobre una cama en una posición inadecuada.
Explanation:
Existen cinco actividades en las que se mantiene una postura corporal incorrecta:
1) Sentarse en una silla.
2) Agacharse y levantar una objeto del piso, especialmente cuando es pesado.
3) Sentarse en un escritorio, especialmente frente a una computadora.
4) Llevar una mochila, especialmente si está sobrecargada.
5) Dormir sobre una cama en una posición inadecuada.
During a chemical reaction, some substances are completely consumed while others my not be. What is the substance that is completely consumed in a chemical reaction?
Question 3 options:
reactant
product
a limiting reactant
Answer:
It is Limiting Reactant
Explanation:
What property of an object describes its natural tendency to resist an acceleration?
In fact, it is the natural tendency of objects to resist changes in their state of motion. This tendency to resist changes in their state of motion is described as inertia. Inertia = the resistance an object has to a change in its state of motion.
A 200 g load attached to a horizontal spring moves in simple harmonic motion with a period of 0.410 s. The total mechanical energy of the spring–load system is 2.00 J.
Complete question:
A 200 g load attached to a horizontal spring moves in simple harmonic motion with a period of 0.410 s. The total mechanical energy of the spring–load system is 2.00 J. Find
(a) the force constant of the spring and (b) the amplitude of the motion.
Answer:
(a) the force constant of the spring = 47 N/m
(b) the amplitude of the motion = 0.292 m
Explanation:
Given;
mass of the spring, m = 200g = 0.2 kg
period of oscillation, T = 0.410 s
total mechanical energy of the spring, E = 2 J
The angular speed is calculated as follows;
[tex]\omega = \frac{2\pi}{T} \\\\\omega = \frac{2\pi}{0.41} \\\\\omega = 15.33 \ rad/s[/tex]
(a) the force constant of the spring
[tex]\omega = \sqrt{\frac{k}{m} } \\\\\omega^2 = \frac{k}{m} \\\\k = m \omega^2\\\\k = (0.2)(15.33)^2\\\\k = 47 \ N/m[/tex]
(b) the amplitude of the motion
E = ¹/₂kA²
2E = kA²
A² = 2E/k
[tex]A = \sqrt{\frac{2E}{k} } \\\\A = \sqrt{\frac{2\times 2}{47} }\\\\A = 0.292 \ m[/tex]
26. A physical science student is performing a thermodynamics experiment in the school laboratory. She takes a 30.0 g ice cube at 0. °C and melts it to water in a beaker over a laboratory burner. She then heats the water to boiling at 100. °C. Finally she boils the water entirely to steam at 100. °C. How much thermal energy was gained by the water during this entire process?
Answer:
The thermal energy gained by the water during the entire process is 90,372 J
Explanation:
Given;
mass of the ice cube, m = 30 g
latent heat of fusion of ice, L = 334 J/g
specific heat capacity of water, C = 4.184 J/g⁰C
latent heat of vaporization of water, h = 2260 J/g
The thermal energy gained by the water during the entire process is calculated as;
[tex]Q_t = Q_{fusion-ice} \ + \ Q_{boil-water} \ + \ Q_{steam-vapor}[/tex]
The heat of fusion of the ice at 0⁰C is calculated as;
[tex]Q_{fusion} = mL = 30\ g \times 334 J/g = 10020 \ J[/tex]
The heat of capacity of the water from 0⁰C to 100 ⁰C
[tex]Q_{boil-water} = mc\Delta \theta = mc(100-0) = 30\ g \times 4.184\ J/g^0C \times 100\ ^0C = 12,552 \ J[/tex]
The heat of vaporization of the steam at 100⁰C is calculated as;
[tex]Q_{steam} = mh= 30 g \times 2260 \ J/g= 67,800 \ J[/tex]
The thermal energy gained by the water during the entire procees;
Qt = 10,020 J + 12,552 J + 67,800 J
= 90,372 J
Therefore, the thermal energy gained by the water during the entire process is 90,372 J
why does the velocity change when the boy hits the ball
Answer:
Freefall is a special case of motion with constant acceleration because acceleration due to gravity is always constant and downward. This is true even when an object is thrown upward or has zero velocity.
When a ball is thrown up in the air, its velocity is initially upward. Since gravity pulls the object toward the earth with a constant acceleration g, the magnitude of velocity decreases as the ball approaches maximum height. At the highest point in its route, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth.
Answer:
Acceleration from gravity is always constant and downward, but the direction and magnitude of velocity change. At the highest point in its trajectory, the ball has zero velocity, and the magnitude of velocity increases again as the ball falls back toward the earth
Explanation:
Velocity is often described as speed with a __________.
Answer:
rate
Explanation:
Note that speed has no direction (it is a scalar) and the velocity at any instant is simply the speed value with a direction.
A boat moves through the water of a river at 10m/s relative to the water, regardless of the boat ‘s direction . If the water in the river is flowing at n1.50m/s , how long does it take the boat to make a round trip consisting of of 300m displacement downstream followed by a 300m displacement upstream?
Answer:
The appropriate solution is "61.37 s".
Explanation:
The given values are:
Boat moves,
= 10 m/s
Water flowing,
= 1.50 m/s
Displacement,
d = 300 m
Now,
The boat is travelling,
= [tex]10+1.50[/tex]
= [tex]11.5 \ m/s[/tex]
Travelling such distance for 300 m will be:
⇒ [tex]v = \frac{d}{t} \ sot \ t[/tex]
[tex]=\frac{d}{v}[/tex]
On putting the values, we get
[tex]=\frac{300}{11.5}[/tex]
[tex]=26.08 \ s[/tex]
Throughout the opposite direction, when the boat seems to be travelling then,
= [tex]10-1.50[/tex]
= [tex]8.5 \ m/s[/tex]
Travelling such distance for 300 m will be:
⇒ [tex]v=\frac{v}{t} \ sot \ t[/tex]
[tex]=\frac{d}{v}[/tex]
On putting the values, we get
[tex]=\frac{300}{8.5}[/tex]
[tex]=35.29 \ s[/tex]
hence,
The time taken by the boat will be:
= [tex]26.08+35.29[/tex]
= [tex]61.37 \ s[/tex]
What is the difference between an object’s speed and its acceleration?
The speed of an object is the distance traveled in unit time, while acceleration of an object is the rate of change of velocity in respect to time
The strongest evidence for the Big Bang theory of the origin of the universe is the thermal radiation emitted by that explosion. This radiation has cooled over the years to only 3 K and is now mostly microwaves. Why should 3 K thermal radiation be microwaves?
Answer:
Based on the Big Bang Theory, the universe should have radiation of the remnant heat from the initially very hot universe called the Cosmic Microwave Background, CMB, which is presently at a temperature of 2.725° above absolute zero temperature (approximately 3 K)
The blackbody spectrum of colder objects have progressively longer wavelengths. At the temperature of 3 K the microwave radiation is the most intense radiation emitted due to the motion of the elementary particles of an object
Therefore, a 3 k thermal radiation should be microwave
Explanation:
HOW TO DO THIS QUESTION PLEASE
The total positive charge on all the atoms of an element are the same because the number of protons determine the identity of the element.
What is an atomic model?An atomic model is a representation of the structure of the atoms of elements.
The negatively charged particles in the figure are the electrons while the positively charged particles are the protons. In the second image, the large grey dot at the center is the nucleus while the smaller grey dots around the ellipses are the electrons.
The total positive charge on all the atoms of an element are the same because the number of protons determine the identity of the element.
Learn more about electrons:https://brainly.com/question/1255220?
#SPJ1
The relation between linear and angular acceleration is:
Answer:
α=atr
the relationship between linear accelaration and linear accelaration is proportional. The greater the angular acceleration is, the larger the linear (tangential) acceleration.
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.
Answer:
The information shows the masses after the compounds are balanced.
2MgO + 2Cl2 → 2MgCl2 + O2
85g + 156g → 188g + 53g
as total mass in reactant is equal to product.
A.
53g of O2, because all mass must be conserved.
Which of the following is the unit of momentum
a) ms-1 b) Kg ms-1
c) Ns d) Kgms-2
Answer:
the answer is (b) Kg ms-1 .
¿Crees que a más horas de sueño mayor descanso?
Answer:
La mayoría de los adultos necesitan entre 7 y 8 horas de sueño de buena calidad en un horario uniforme todas las noches.
Explanation:
An antelope runs 10 meters in .5 seconds, calculate its speed?
How long would it take a bicyclist to complete a 50 km race at a speed of 20 km/hour?
How far can a person walk at a speed of 1.7 m/s in 60 seconds?
Answer:
speed=10m5s=2m/s for the antelope
which obsevation would be evidence that heat was transferred by radiation?
A 22.0 ohm and 75.0 ohm resistor are
in parallel, connected to a 5.00 V
battery. How much current flows out
of the battery?
(Unit = A)
total resistance 97 ohms
ohm's law 5= 97 (I)
I= 5/97 A = 0.0515 A
Answer:0.294
Explanation: right in acellus
what makes global winds curve rather than move in a straight line?
Answer:
because the Earth rotates, circulating air is deflected. Instead of circulating in a straight pattern, the air deflects toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere, resulting in curved paths. This deflection is called the Coriolis effect.
1. Velocity and speed are both calculated by using what formula?
Explanation:
Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.
morse code and string phone cup
1.What was different about the two methods?
2.If your string phone stretched out one block long, which method do you think would be clearer?
3. If you had a Morse Code expert on both ends to act like a computer taking in information, would that make a difference?
Answer:
Following are the responses to the given question:
Explanation:
Following are the difference in the speed and accuracy:
The biggest difference was its tone between both the cup method as well as the Morse code. One should talk using cup system and sequence system and let its covering be understood in Morse code, just a series of beeps weren’t tangible... Secondly, a method of cup involves a range string. Rukun Negara is often distributed by cable, but this is a greater range. It reaches concurrently in those other areas.
In the case of using the string method for the block, its distance and stiffness of the string are limited and the barriers are eliminated. It will certainly be convenient and clearer if one utilizes Sign language.
If two experts are acting like such a machine on both sides, their information between both the 2 persons is smoother and quicker as they will not have to wait for data from a third person which may create another pause at the time.
Morse code is faster, eventually. For some very small periods when sensitive information is not transmitted, strings or cup methods must be reserved.
which is not a detritivore
a. maggots
b.worms
c.dung flies
d.squirrels
d. squirrels
Detritivores eat remains. Maggots, flies, worms, fungi, vultures...all detritivores.
Answer:
to small cant see the question
Explanation:
;(
Which of the following best describes a nebula?
Explanation:
is a formation in space which is constituted mostly of helium, dust and other gases in various concentration
How much Work have you done if you raise 5.0 N weight 1.8 m above the ground?
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.
which example would most likely decrease friction?
Answer:
using cleats other than gym shoes
Explanation:
the cleats hwve spikes and help gain speed
ABC
Question 18
A 110-kilogram bodybuilder and his 55-kilogram friend run up identical flights of stairs. The bodybuilder reaches the top
in 4.0 seconds while his friend takes 2.0 seconds. Compared to the power developed by the bodybuilder while running
up the stairs, the power developed by his friend is which of the following?
А
twice as much
B
the same
с
half as much
D
four times as much
Answer:
The answer is option C.Half as much
The correct answer is four times as much.
Let the friend's mass be m, then according to the question the bodybuilder's mass will be 2m.
Now they both cover the same distance but the bodybuilder takes 4s and his friend takes 2s. Hence, if the time taken by the friend is t then the bodybuilder takes 2t time.
That means if the velocity of the bodybuilder is v then the velocity of his friend will be 2v.
Now, Power is defined as the rate of work done.
P = W/t
and work done is the change in kinetic energy.
Now the power generated by the bodybuilder is:
[tex]P_{b}=\frac{\frac{1}{2}2mv^{2} }{2t} \\\\P_b=\frac{mv^2}{2t}[/tex] ............(1)
power generated by the friend is :
[tex]P_{f}=\frac{\frac{1}{2}m(2v)^{2} }{t} \\\\P_b=\frac{4mv^2}{2t}[/tex].............(2)
Comparing (1) and (2) we get:
The friend generates four times as much power as the bodybuilder.
Learn more:
https://brainly.com/question/4232216
The frequency range for a normal human ear is between 20 Hz and 20 000 Hz. Using 330 m/s as the speed of sound, a. Calculate the shortest wavelength of sound that can be heard: b. Calculate the longest wavelength of sound that can be heard:
Answer:
(a) 0.0165 m
(b) 16.5 m
Explanation:
Applying,
v = λf.................. Equation 1
Where v = velocity, f = frequency, λ = wave length.
make λ the subject of the equation
λ = v/f............. Equation 2
(a) Shortest wavelength (λ')
Given: f' = 20000 Hz, v = 330 m/s
Substitute these values into equation 2
λ' = 330/20000
λ' = 0.0165 m
(b) Longest wavelength (λ)
Given: v = 330 m/s, f = 20 Hz
Substitute these value into equation 2
λ = 330/20
λ = 16.5 m
Task: At the end of the lesson you will be asked to develop a final writing assignment on the environmental problerns
caused by invasive e algae e, and the methods used to restore the natural habitats e in Crystal River and Kings Bay,
ments
Essay Response: (3 Paragraphs)
5
• Describe the environmental problem caused by invasive algae in these areas and the goals of the Save Crystal River
project.
• Explain the steps in the process used to correct the problem.
. Finally, conclude with why the information gathered during the Save Crystal River project is important to the
environment now and to future generations,
If someone can answer this fast I will mark as brainlist and give them 100 points plzz I need the answer fast and right!!
Answer:
PLS PLS PLS mark brainliest
Explanation:
The following are the environmental problems caused by the invasive algae which is known as Lyngbya.
A. It blocks the sunlight from reaching the water, thereby depriving the plants in the water from accessing it. So they won't be able to manufacture their foods and eventually die off.
B. The algae produce offensive odour like rotten egg , which drive people and other organisms away.
C. The algae prevent oxygen from entering the water, and prevent the resident organisms from making use of it, which leads to their death.
D. The algae also give off heat into the chilly spring waters.
In conclusion, the goals of the Crystal River project is to save the living organisms in the river from extinction and to make it a livable environment for them.
What kind of image is formed by an object that is placed beyond the center of curvature on the principal axis of a concave mirror?
A.
real, inverted, the same size as the object, and at the same distance as the object
B.
real, inverted, larger than the object, and farther from the mirror than the object
C.
virtual, upright, left-right reversal, the same size as the object, and at the same distance as the object
D.
real, inverted, smaller than the object, and closer to the mirror than the object
E.
virtual, upright, larger than the object, and farther from the mirror than the object
Answer:D.
Real, inverted, smaller than the object, and closer to the mirror than the object
Explanation: Real images will be inverted. As it is beyond the centre of curvature it is also beyond 2F which means that the image is inside the centre of curvature ( between F and 2F from the mirror ) As the image is closer to the mirror than the object it must be diminished in size