A farmer designs a corn plant that produces multicolored kernels by crossing a plant that has yellow kernels with a plant that has red kernels? Which of these describes the process the farmer uses? А. Natural selection B. Selective breeding C. Genetic engineering D. Asexual reproduction
Answer:
b
Explanation:
B is the answer because Selective breeding is taking two organisms and crossing them.
A person wants to redesign a large room in a house to have less echoing of sound and more sunlight. Which design solution will best match the persons needs?
(A.) Hang curtains over the windows that will transmit sound waves and absorb light waves.
(B.) add pillows to the furniture that will reflect sound waves and refract light waves.
(C.) Place a thick white carpet on the floor that will absorb sound waves and reflect light waves.
(D.) Add a large mirror on the wall that will refract sound waves and reflect light waves.
Answer:
(A.) Hang curtains over the windows that will transmit sound waves and absorb light waves
Emma is conducting an investigation to compare several physical properties of samples of two different kinds of rocks. When she measured and compared the masses of the two rocks, she found that rock 1 had a greater mass than rock 2. Which of the following is the best prediction of how another property of the rocks will compare?
A. The density of rock 1 will be the same as the density of rock 2
B. The weight of rock will be the greater than the weight of rock 2
C. The volume of rock 1 will be less than the volume of rock 2
D. The state of matter of rock 1 will be different than that of rock 2
Answer:
B. The weight of rock 1 will be the greater than the weight of rock 2
Explanation:
We are told that the mass of rock 1 is greater than the mass of rock 2.
Now, weight is given by;
W = mg.
g is constant. Thus means that weight of rock 1 will be greater than weight of rock 2.
A 10 kg blue cart moving to the right at 25 m/s collides with a 17 kg red cart moving in the opposite direction at 16 m/s. If, after the collision, the blue cart's velocity is reduced to 10 m/s, how fast and in what direction is the red cart moving?
Answer:
24.8m/s
Explanation:
Given data
m1= 10kg
u1=25m/s
m2=17kg
u2=16m/s
v1=10m/s
v2=??
Applying the conservation of linear momentum
m1u1+m2u2=m1v1+m2v2
substitute
10*25+17*16=10*10+17*v2
250+272=100+17v2
522=100+17v2
522-100=17v2
422=17v2
Divide both sides by 17
v2= 422/17
v2= 24.8 m/s
Hence the velocity of the red cart is 24.8m/s in the opposite direction of the blue cart
Two light bulbs are equally bright, but one has a power of 6 W while the other has a power of 10 W. In one hour the higher power bulb uses J more energy than the lower power bulb.
If the acceleration of motorboat is 4m/s^2 and the motorboat stsrtsfrol.Rest what is velocity after 6.0 s
Answer:
24 m/s
Explanation:
Using v = u + at where u = initial velocity of the motorboat = 0 m/s (since the boat starts from rest), a = acceleration = 4 m/s², t = time = 6 s and v = velocity of the motorboat after 6.0 s.
Substituting the values of the variables into the equation, we have
v = u + at
= 0 m/s + 4 m/s² × 6.0 s
= 0 m/s + 24 m/s
= 24 m/s
A 10.0 kg bowling ball is moving at 10 m/s when it strikes a 20 kg bowling pin. After the collision,
the pin moves forward at 15 m/s. How fast is the ball moving after it hits the pin?
Answer: 20 m/s
Explanation:
Given
mass of bowling ball m=10 kg
Mass of bowling pin M=20 kg
The initial velocity of ball u=10 m/s
The velocity of the pin after collision [tex]v_2=15\ m/s[/tex]
Conserving linear momentum as there is no external force applied
[tex]mu=mv_1+Mv_2\quad \quad (v_1=\text{velocity of ball after collision})[/tex]
[tex]10\times10=10\times v_1+20\times15\\10v_1=100-300\\v_1=-20\ m/s[/tex]
i.e. ball started moving in the direction opposite of its initial direction with a velocity of 20 m/s
The ball moves backwards with a velocity of -20m/s
The data given are;
m[tex]_1[/tex] = 10kgm[tex]_2[/tex] = 20kgu[tex]_1[/tex] = 10m/sv[tex]_1[/tex] = ?v[tex]_2[/tex] = 15m/sLaw of conservation of linear momentumThis law states that assuming no external forces are acting, when two bodies collide together, the sum of their initial momentum remains constant and it's not changed by their collision.
Applying the law of conservation of linear momentum
[tex]m_1u_1+m_2u_2=m_1v_1+m_2v_2\\(10*10) + (20*0) = (10*v_1)+(20*15)\\100+0=10v_1+300[/tex]
collect like terms
[tex]100=10v_1+300\\100-300=10v_1\\-200=10v_1\\v_1=\frac{-200}{10}\\v_1=-20m/s[/tex]
This shows that the balls moves backwards hence the reason why it have a negative velocity.
From the calculation above, the ball moves backwards with a velocity of -20m/s.
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Which shows zero as significant digits? Check all that apply.
0.02
7.560
430
604
70,230
Answer:
0.02
430
604
70,230
Explanation:
⇒zero in-between two digits or at the end of a whole is considered significant, example 604, 430, 70,230.
⇒zero at the end of a number with decimal point is not significant, example 7.560
⇒ zero before a digit in a number with decimal point is significant, example 0.02
Thus, the numbers which show zero as a significant digits include;
0.02
430
604
70,230
Guys this is urgent and I don’t know please help me I will mark brainliest!
Have a good day/night!!!
Answer:
Not acted upon there is no motion
Forces acted upon there is motion
You can refer to the definition stated below:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. This is normally taken as the definition of inertia. ... If that velocity is zero, then the object remains at rest.
A certain quantity of a liquid has a volume of 10cm at 20°C. Calculate its volume at 50°C, if it’s cubic expansivity is 10^(-3) K^(-1)
Answer:
10.3 cm³
Explanation:
From the question given above, the following data were obtained:
Original volume (V₁) = 10 cm³
Initial temperature (θ₁) = 20 °C
Final temperature (θ₂) = 50 °C
Cubic expansivity (γ) = 10¯³ K¯¹
Final volume (V₂) =?
γ = V₂ – V₁ / V₁(θ₂ – θ₁)
10¯³ = V₂ – 10 / 10( 50 – 20)
10¯³ = V₂ – 10 / 10(30)
10¯³ = V₂ – 10 / 300
Cross multiply
10¯³ × 300 = V₂ – 10
0.3 = V₂ – 10
Collect like terms
0.3 + 10 = V₂
10.3 = V₂
V₂ = 10.3 cm³
Thus, the volume at 50 °C is 10.3 cm³
James Bond is unconscious in a 1000kg car full of explosive on a very dangerous road. After starting from rest at the top of the hill (point A), the car reaches the flat (horizontal) part of the road. At the beginning of the flat(horizontal) part, Bond regains the consciousness and applies brakes. The car skids across the horizontal road while slowing. The car, full of explosive, stops just as it reaches the far edge of the 50 m flat (horizontal) part of the road. What constant breaking force would have to be applied for the car to make a safe stop in a horizontal distance of 50 m?
Answer:
F = 19600 N
Explanation:
After reading this interesting exercise, I think you are missing the diagram, but we are going to solve them assuming the height of the hill, point A of about h = 100m.
Let's start by using the concepts of energy, to find the speed at the bottom of the hill
Starting point. Point A highest part of the colima
Em₀ = U = m g h
Final point. Flat part.
[tex]Em_{f}[/tex] = k = ½ m v²
as they tell us that there is no friction, energy is conserved
Em₀ = Em_{f}
mgh = ½ m v²
v = √2gh
let's calculate
v = √ (2 9.8 100)
v = 44.27 m / s
Now we can use the scientific expressions, when it stops its speed is zero
v² = v₀² - 2 a x
0 = v₀² - 2ax
a = [tex]\frac{ v_{o}^2 }{2x}[/tex]
a = [tex]\frac{ 44.27^{2} }{ 2 \ 50}[/tex]
a = 19.6 m / s²
with this acceleration we use Newton's second law
f = m a
F = 1000 19.6
F = 19600 N
Which is faster a velocity of + 3 m /s or -4 m / s
Answer: Velocity of 3m is the faster
Explanation: Velocity of 3m is the faster because velocity of -4m goes in an opposite direction to positive velocities
write any three reasons to separate the mixtures?
Answer:
people separate mixtures in order to ger a specific substance that they need. 2. the other thing people separate mixtures to remove the unrequired components. 3.To get a pure substance
Explanation:
hope this helps probably don't because you asked this a week ago but have a good day :) ❤
Which is a primary energy source used by power plants to generate electricity
A:wind power
B:solar
C:coal
D:hydropower
Answer:
it would be coal
Explanation:
coal is the most used energy source in many countries as of China , India and, the United States
Coal is a primary energy source used by power plants to generate electricity
Electricity generation plants convert the chemical energy of fuel into electricity. Coal, oil, natural gas and nuclear fuels are the energy sources most commonly used for generating electricity.
What is coal ?"Coal is a combustible black or brownish-black sedimentary rock with a high amount of carbon and hydrocarbons. Coal is classified as a nonrenewable energy source because it takes millions of years to form. Coal contains the energy stored by plants that lived hundreds of millions of years ago in swampy forests."
What is electricity?"A fundamental form of energy observable in positive and negative forms that occurs naturally (as in lightning) or is produced (as in a generator) and that is expressed in terms of the movement and interaction of electrons. "
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How does the thermoflask prevent heat loss
Answer:
The way that the flask is built it has 3 protective layers.... the inside layer to keep the heat in, the outside layer to reflective the cold, and a vacuum layer, which is an empty layer that limits conduction and convection
Explanation:
If she runs 3,223 meters each day and keeps this up for two weeks, how many miles will she have run
Answer:
28 miles
Explanation:
3,223 meters/day x 14 days = 45,122 meters
1 meter = 3.28 feet
45,122 meters = 148,000 feet
5280 feet = 1 mile
148,000 feet = 28 miles
Sirius A is 8.6 light-years from Earth. What is this distance in kilometers? What is this distance in feet?
Answer:
a. 8.136 × 10¹³ km b. 2.669 × 10¹⁹ feet
Explanation:
a. What is this distance in kilometers?
Since Sirius A is 8.6 light years away from Earth and one light year = distance travelled by light in a year = 3 × 10⁸ m/ s × 365 days/year × 24 hr/day × 3600 s/hr = 9.4608 × 10¹⁵ m = 9.4608 × 10¹² km.
Then 8.6 light years = 8.6 × 1 light year
= 8.6 × 9.4608 × 10¹² km
= 81.363 × 10¹² km
= 8.1363 × 10¹³ km
≅ 8.136 × 10¹³ km
b. What is this distance in feet?
Since 1 meter = 3.28 feet,
8.6 light years = 8.1363 × 10¹² km
= 8136.3 × 10¹⁵ m
= 8136.3 × 10¹⁵ × 1 m
= 8136.3 × 10¹⁵ × 3.28 feet
= 26687.1 × 10¹⁵ feet
= 2.66871 × 10¹⁹ feet
≅ 2.669 × 10¹⁹ feet
Movement of water though the membrane is called?
Answer:
Its called diffusion :)
Explanation:
An object starts at position 12 on a horizontal line with a reference point of 0. What is the position of the object if it
moves 14 units to the left?
-26
-2.
ОООО
2
26
Answer:
Answer is -2.
Explanation:
I hope it's helpful!
Answer:
neg 2
Explanation:
1. Calculate the momentum of the rolled ball for each trial using the formula p = mv. Show your work below and record your answers on your data table.
2. Graph the relationship between the momentum of each ball and the distance that the softball moved. The s-axis should be momentum (kg.m/s), and the y-axis should be distance (meters). Attach your graph paper to your lab report.
3. By looking at the graph, what can you conclude about the relationship between the momentum of the colliding ball and the distance the softball moved?
4. Explain why bowling balls have such a large mass. What would happen if you tried to bowl with a ping pong ball? Explain
5. When you bowl, should you roll the ball gently? Explain your answer.
You want us to answer all of those or-??
Which machine can create images of atoms?
Answer: Scanning Tunneling Microscope
Explanation:
The answer is, of course, the greatest Star Trek fan art imaginable: images literally built out of individual atoms. The images are the work of IBM scientists who created the unique artwork with a two-ton machine called the Scanning Tunneling Microscope that moves single atoms across a tiny piece of copper.
How does the final kinetic energy of the system in an inelastic collision compare to the initial kinetic energy?
Answer: In an inelastic collision, the total kinetic energy after the collision is not equal to the total kinetic energy before the collision. While inelastic collisions may not conserve total kinetic energy, they do conserve total momentum.
Explanation:
Hope this helps!The final kinetic energy is less than the initial kinetic energy.
What is kinetic energy?Kinetic energy is the form of energy that one possesses when he is in motion.
During an inelastic collision, the momentum of the system is conserved, but the total kinetic energy is not conserved.
Some part of the initial kinetic energy of the system gets lost in the form of heat, light, and sound produced during the collision. Consequently, the final kinetic energy must be less than the initial kinetic energy.
Thus, the final kinetic energy is less than the initial kinetic energy.
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28 + 11 =
7 + 12 =
15 + 2 =
22 + 1 =
45 + 2 =
18 + 2 =
7 + 11 =
10 + 11 =
12 + 10 =
11 + 2 =
15 + 10 =
16 + 12 =
2 + 24 =
62 + 10 =
98 + 2 =
12 + 3 =
18 + 12 =
2 + 17 =
14 + 11 =
2 + 40 =
Vertical Addition 1 + 1 = 2
Explanation:
28 + 11 = 39
7 + 12 = 17
15 + 2 = 17
22 + 1 = 23
45 + 2 = 47
18 + 2 = 20
7 + 11 = 18
10 + 11 = 21
12 + 10 = 22
11 + 2 = 13
15 + 10 = 25
16 + 12 = 28
2 + 24 = 26
62 + 10 = 72
98 + 2 = 100
12 + 3 = 15
18 + 12 = 30
2 + 17 = 19
14 + 11 = 25
2 + 40 = 42
what is mks system and cgs system
Answer:
The MKS system of units is a physical system of measurement that uses the metre, kilogram, and second (MKS) as base units. Adopted in 1889, use of the MKS system of units succeeded the centimetre–gram–second system of units (CGS) in commerce and engineering.
Dos cargas eléctrica 6x10°6 C Y 3X10°6 C se encuentra sepadas 0,5 m. ¿Cual es la Magnitud de la fuerza de atracción entre las cargas?
Answer:
La magnitud de la fuerza de atracción entre las cargas es 0.648 newtons.
Explanation:
El enunciado escrito correctamente se presenta a continuación:
Dos cargas eléctricas de polaridades opuestas entre sí y con magnitudes [tex]6\times 10^{-6}\,C[/tex] y [tex]3\times 10^{-6}\,C[/tex] se encuentran separados 0.5 metros. ¿Cuál es la magnitud de la fuerza de atracción entre las cargas?
La magnitud de la fuerza eléctrica entre las dos partículas cargadas eléctricamente se determina mediante la ley de Coulomb, la cual establece que la fuerza eléctrica es directamente proporcional a la carga eléctrica e inversamente proporcional al cuadrado de la distancia. En términos matemáticos, la ecuación de Coulomb se expresa de la siguiente manera:
[tex]F = \frac{\kappa \cdot q_{A}\cdot q_{B}}{r^{2}}[/tex] (1)
Donde:
[tex]\kappa[/tex] - Constante electrostática, medida en newton-metros cuadrados por Coulomb cuadrado.
[tex]q_{A}[/tex], [tex]q_{B}[/tex] - Cargas eléctricas de cada partícula, medidas en Coulomb.
[tex]r[/tex] - Distancia entre las partículas, medidas en metros.
Si tenemos que [tex]\kappa = 9\times 10^{9}\,\frac{N\cdot m^{2}}{C^{2}}[/tex], [tex]q_{A} = 6\times 10^{-6}\,C[/tex], [tex]q_{B} = 3\times 10^{-6}\,C[/tex] y [tex]r = 0.5\,m[/tex], entonces la fuerza eléctrica de atracción es:
[tex]F = \frac{\left(9\times 10^{9}\,\frac{N\cdot m^{2}}{C^{2}} \right)\cdot (6\times 10^{-6}\,C)\cdot (3\times 10^{-6}\,C)}{(0.5\,m)^{2}}[/tex]
[tex]F = 0.648\,N[/tex]
La magnitud de la fuerza de atracción entre las cargas es 0.648 newtons.
True or false 6.02x10^23 atoms of oxygen have a mass of 16g ?
Answer:
True
Explanation:
The atomic mass of oxygen is 16amu, which means the molar mass, the mass of one mole of oxygen atoms (1 mole = 6.02x10²³), is 16g.
What are the main organs of the respiratory system that are located in the rib cage
Answer:
Larynx.
Pharynx.
Lungs.
Diaphragm.
Explanation:
Answer:
Larynx, Pharynx, Lungs, and Diaphragm.
Explanation:
Mary is investigating the densities of objects. She is going to use the table below to record her results. Which of these can she find using a ruler?
answer
block of aluminium
Block of aluminum investigating the densities of objects. She is going to use the table below to record her results.
What is a block of aluminum?A block of Aluminum is a block added by Tinkers' Construct. Block of Aluminum is primarily used as a storage block for Aluminum Ingots but may also be used as decoration.
What are 3 uses of aluminum?Aluminum is used in a huge variety of products including cans, foils, kitchen utensils, window frames, beer kegs, and airplane parts. This is because of its particular properties.
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HELP I DON'T PAY ATTENTION ENOUGH
Answer:
I think 1 is d and 2 is A
Explanation:
but I may be wrong and I am so sorry if I am
Answer: Well the first one is D. The second one would be A because if you do the research and eliminate the other ones, these answers would have to be the correct ones following the reading and checking websites
Explanation:
Dos cargas electrica 6x10°6 C Y 3X10°6 C se encuentra sepadas 0,5 m. ¿Cual es la Magnitud de la fuerza de atraccion entre las cargas?
Answer:
La magnitud de la fuerza de atracción entre las cargas es 0.648 newtons.
Explanation:
La fuerza eléctrica de atracción entre dos partículas cargadas eléctricamente es determinada por la ley de Coulomb, la cual dice que la fuerza eléctrica es directamente proporcional a la carga eléctrica e inversamente proporcional de la distancia entre las partículas. Matemáticamente hablando, la formula es descrita a continuación:
[tex]F = \kappa\cdot \frac{q_{A}\cdot q_{B}}{r^{2}}[/tex] (1)
Donde:
[tex]F[/tex] - Fuerza electrostática, medida en newtons.
[tex]\kappa[/tex] - Constante electrostática, medida en newton-metros cuadrados por Coulomb cuadrado.
[tex]q_{A}[/tex], [tex]q_{B}[/tex] - Cargas eléctricas, medidas en Coulomb.
[tex]r[/tex] - Distancia entre partículas, medidas en metros.
Si sabemos que [tex]\kappa = 9\times 10^{9}\,\frac{N\cdot m^{2}}{C^{2}}[/tex], [tex]q_{A} = 6\times 10^{-6}\,C[/tex], [tex]q_{B} = 3\times 10^{-6}\,C[/tex] y [tex]r = 0.5\,m[/tex], entonces la magnitud de la fuerza de atracción entre las cargas es:
[tex]F = \left(9\times 10^{9}\,\frac{N\cdot m^{2}}{C^{2}} \right)\cdot \frac{(6\times 10^{-6}\,C)\cdot (3\times 10^{-6}\,C)}{(0.5\,m)^{2}}[/tex]
[tex]F = 0.648\,N[/tex]
La magnitud de la fuerza de atracción entre las cargas es 0.648 newtons.
