Answer:
resultant is a single force that can replace the of a number of forces , equililbrant is a force that is exactly opposite to resultant
Explanation:
Which of the following is an accurate statement? A. Step-up voltage transformers have fewer turns in the primary that in the secondary winding. B. aC generators produce current that's pulsating but always remains positive C. Step-down voltage transformers have a different number of turns in the primary than in the secondary winding, so they change the incoming collage to a higher voltage D. DC generators produce current with a voltage that changes from positive to negative
Answer:
Option A is an accurate one.
Explanation:
A transformer being considered as a step-up transformer during which the performance (supplementary) voltage becomes stronger than that of the input (main) impedance of it. This kind of transformer reduces the electrical output to constantly keep the product input as well as power consumption equivalent.The other provided alternative is not related to the information provided there. So the response to the above seems to be the correct one.
Write a report on the lap experiment: Motion with Constant Acceleration
Answer:
Purpose: To observe how an object’s position and velocity change while it is moving with a constant acceleration.
Question: How does an object’s position and velocity change as the object accelerates?
Hypothesis: If the fan speed increases, then the acceleration of the cart increases, because a greater fan speed supplies more energy to move the cart.
Variables:
• Independent variable: fan speed
• Dependent variable: acceleration of the cart
• Controlled variables: mass
Materials:
• Cart with Fan (1 kg)
• CM ruler (1 cm)
• Stop watch (0.0 cm pe sec)
• Flag
Procedure:
1. Use the setup on “Force and Fan Carts” Gizmo.
2. First, put the fan speed on low and no friction surface.
3. Press the start button and record the final time when the cart crosses the finished line. Record on table B.
4. Then, click on the data tab to record the speed data, total distance, average velocity, and acceleration. Record on table A and B.
5. After, observe the position vs. time graph with the speed and line graph toggled. Record on table C.
6. Repeat steps 2-5 on fan speed on medium and high with no friction surface.
7. Next, reset and put fan speed on low.
8. Press start and pause on 4 seconds.
9. On the same trial turn off the fan speed and hit start again.
10. Observe the graph and write observations on table D.
Analysis and Conclusion:
In conclusion, my hypothesis matches the data, because the data shows that increasing the fan speed increases the acceleration of the cart. The trends for all fan speeds are linear slope for speed. The higher the fan speed, the less time it took for the cart to cross the finish line.
Data:
Explanation:
Sorry can’t copy and paste results
Answer:
for that pervious answer why cant we copy and paste?
Explanation:
Which statement is accurate about mass or weight? A. Mass can be measured in newtons. B. Weight can be measured in pounds. C. A bowling ball has the same mass as a golf ball. D. Objects have the same weight regardless of where they are.
Answer:
Option B
Explanation:
Weight can be measured in pounds. Pounds is a unit of weight.
=> Mass is measured in kgs
=> A bowling ball has more mass than a golf ball.
=> Objects do not have the same weight regardless of where they are. The weight depends on where they are as it depends on the acceleration due to gravity (g)
Answer:
B
Explanation:
You are in a desert on a hot day and see water in the distance. It is not really there, you see it because light bends due to a difference in the temperature of air. Which behavior of light best explains this? Select one: a. reflection b. translocation c. diffraction d. refraction
Answer:
d) refraction
Explanation:
in physics, refraction is the change of direction of a wave passing from one medium to another. refraction of light is the most commonly observed phenomenon but other waves such as sound waves and water waves also experience refraction
Answer:
B. Translocation
Explanation:
It means a change in location. It often refers to genetics, when part of a chromosome is transferred to another chromosome, you want a change in location because you are so thirsty in the desert and need water
Which of the following pure elements exist as liquids at normal Earth temperatures?
Answer:
The only liquid elements at standard temperature and pressure are bromine (Br) and mercury (Hg).
what are the physical changes on water
0
Which of the following can you conclude about a particle labeled
Check all that apply.
O A. It has one electron.
OB. It has one neutron.
I C. It has one nucleon.
O D. It has one proton.
E. It is negatively charged.
OF. It is an alpha particle.
O G. It is a beta particle.
Answer:
B and C
Explanation:
The given symbol [tex]_{-1}^{0}e[/tex] denotes an electron. An electrons has neglecting mass and has one unit of negative charge. Thus, option A is correct.
What is an electrons?An electron is a subatomic particle. the other subatomic particles that constitutes an atom are neutrons and protons. neutrons and protons are located inside the nucleus and electrons are revolving around the nucleus through circular paths of fixed energies.
Electrons are having negative charge and protons are positively charged particles. For an atom the number of protons and electrons are the same. Therefore, an element in its atomic state is neutral.
Neutrons are neutral. However both neutrons and protons are having significant mass compared to an electrons. Hence, the representation of electrons include zero mass and -1 charge. Hence, option A is correct.
To find more on electrons, refer here:
https://brainly.com/question/1255220
#SPJ5
PLS ANSWER REALLY EASY! WILL MARK BRAINLIEST.
State 4 differences (at least 3) between period and groups in the periodic table
Explanation:
They are;
The vertical columns of periodic table is called group and the horizontal rows of periodic table is called periods.The valance electron of all elements in the same group are the same but in periods the valance electron of elements in the same period increases from left to righr.The size of atoms increases top to bottom. but in case of periods the size of atoms decreases from left to right.Metalic reactivity increases and non metalic reactivity decreases from top to bottom. but in periods metalic reactivity decreases and non metalic reactivity increases from left to right.hope it helps...
Plz Help me with this
Answer:
Cools ; size
Explanation:
The rate at which magma cools determines the size of the crystals in the new rock. Igneous rocks are formed from the cooling and solidification of molten magma which finds its way to the surface or depth of very low pressure beneath the surface. This place or depth of cooling of magma affects the cooling rate and hence the size of the crystals formed. Igneous rocks formed at depths below the surface have more time to cool and allows more time for Crystal growth and hence produce coarse grained crystal grains called Intrusive igneous rocks which have significantly larger crystals than those formed on the surface which cools rapidly and allowing very little time for crystal growth giving rise to the formation of fine grained crystals and are called extrusive igneous rocks.
in the diagram, q2 is +34.4*10^-6 C, and q3 is -72.8*10^-6 C. The net force on q2 is 225 N to the right. What is q1? Include the sign of the charge (+ or -). PLS HELP
Answer:
q₁ = -6.54 10⁻⁵ C
Explanation:
Force is a vector quantity, but since all charges are on the x-axis, we can work in one dimension, let's apply Newton's second law
F = F₁₂ + F₂₃
the electric force is given by Coulomb's law
F = k q₁q₂ / r₁₂²
let's write the expression for each force
F₂₃ = k q₂ q₃ / r₂₃²
F₂₃ = 9 10⁹ 34.4 10⁻⁶ 72.8 10⁻⁶ / 0.1²
F₂₃ = 2.25 10³ N
F₁₂ = k q₁q₂ / r₁₂²
F₁₂ = 9 10⁹ q₁ 34.4 10⁻⁶ / 0.1²
F₁₂ = q₁ 3,096 10⁷ N
we substitute in the first equation
225 = q₁ 3,096 10⁷ +2.25 10³
q₁ = (225 - 2.25 10³) / 3,096 10⁷
q₁ = -6.54 10⁻⁵ C
Which choice most accurately defines resistance and voltage of a circuit?
Resistance can be defined as the potential difference between two points in a circuit, while voltage is the amount of electrons moving through a point in a circuit every second.
Voltage can be defined as the potential difference between two points in a circuit, while resistance is the amount of electrons moving through a point in a circuit every second.
Voltage can be defined as the potential difference between two points in a circuit, while resistance opposes the flow of electrons in a circuit.
Resistance can be defined as the potential difference between two points in a circuit, while voltage opposes the flow of electrons in a circuit.
Answer:
Resistance can be defined as the potential difference between two points in a circuit, while voltage is the amount of electrons moving through a point in a circuit every second.
Explanation:
Help me please savior
Answer:
-16°C
Explanation:
PV = nRT
V and n are constant.
P / T = P / T
(2 atm + 1 atm) / (266 K) = (1.9 atm + 1 atm) / T
T = 257.1 K
T = -16°C
Help me please, help
Answer:
455,000 Pa
Explanation:
PV = nRT
If n is constant:
PV / T = PV / T
(101,325 Pa) (718 mL) / (273 K) = P (175 mL) / (26 + 273) K
P = 455,000 Pa
help me pls help me pls
Answer:
a ) 19,536.72 J,
b ) ( About ) 84°C
Explanation:
a ) We can solve this problem assuming that the dishwater remains a constant 78°C the entire duration.
Q = mass of the glass [tex]*[/tex] specific heat of the glass
The mass of the glass is given by 401 g, the specific heat by 840 J / kg [tex]*[/tex] C. Respectively the change in temperature would be the difference between the temperature of the dishwater, and that of the glass. As we want the units in Joules, we need to first convert the 401 g ⇒ kilograms.
401 g = 401 / 1000 kg = 0.401 kg,
Q = 0.401 kg [tex]*[/tex] 840 J / kg 19,536.72 J
b ) We know that the specific heat capacity of water is 4.184 J / g [tex]*[/tex] C. As the final temperature will be common between each substance, we can make their respective heat absorbed, the same. Note that the heat capacity is given in J / g
0.023 kg = 0.023 [tex]*[/tex] 1000 = 23 g,
0.18 kg = 180 g
[tex]- ( 180 )( 4.184 )( x - 93 ) = 23( 4.184 )( x - 14 )[/tex],
[tex]-753.12x+70040.16=96.232x-1347.248[/tex],
[tex]-753.12x=96.232x-71387.408[/tex],
[tex]-849.352x=-71387.408[/tex],
[tex]\frac{-849.352x}{-849.352}=\frac{-71387.408}{-849.352}[/tex],
[tex]x=84.04926\dots[/tex]
The final temperature will be about 84°C
A magnifying glass uses a convex lens of focal length 5.25 cm. When it is held 5.00 cm in front of an object, what magnification does it create? pls help
Answer:
21
Explanation:
conditions of equilibrium of parallel coplanar forces
Answer:
Bruh............
Explanation:
A boy on a chairlift moving parallel to the mountain slope at a speed of +15 m/s watches a skier going straight down the mountain with a speed of -35 m/s. What is the velocity of the skier relative to the chairlift? A. -50 m/s B. -35 m/s C. -20 m/s D. +15 m/s E. +50 m/s
Answer:
A. -50 m/s
Explanation:
Given
Velocity of Chairlift = +15m/s
Velocity of Skier = -35m/s
Required
Determine the velocity of the skier relative to the chairlift
Basically, relative velocity is the difference between the two velocities;
Having said that;
Relative velocity of the skier relative to the chairlift = Velocity of the Skier - Velocity of the Chairlift
Relative velocity of the skier relative to the chairlift = -35m/s - (+15m/s)
Open bracket
Relative velocity of the skier relative to the chairlift = -35m/s - 15m/s
Relative velocity of the skier relative to the chairlift = -50
Which of the following scientists introduced the concept of absolute zero?
A.lord kelvin
B.edwin Hubble
C.jonhannes kelper
D. Albert Einstein
Answer:
A. lord kelvin
Explanation:
In 1848, Kelvin used this as a basis for an absolute temperature scale. He defined "absolute" as the temperature at which molecules would stop moving, or "infinite cold." From absolute zero, he used the same unit as Celsius to determine the increments.
Absolute zero cannot technically be achieved. However, scientists have been able to lower the temperature of matter to just a fraction of a Kelvin above absolute zero through techniques such slowing down particles using lasers.
A person with a mass of 15 kg is walking uphill at a velocity of 2 m/s. What is the walker's
momentum?
A) 15 kg-m/s
B) 30 kg-m/s
C) 10 kg-m/s
D) 13 kg-m/s
Answer:
30kg-m/s
Explanation:
momentum = mass x velocity
Research and discuss the aurora borealis in
terms of electric charges, magnetic fields,
and forces. Which times of the year are best
for seeing the northern lights, and where are
the best places to view them? Explain your
answers. Also identify links to good images. If
you've ever seen the aurora borealis,
describe your experience and note the time
and place that you saw it.
Answer: the best times to see it would be from 10 pm to 1 am, meaning when the night skies are dark and clear. The best months to see it would be from April to late August. Whereas the best places in the world to view them would be closer to the arctic circle, this includes Canada, Alaska, Iceland and Greenland.
Explanation:
Hope this helps
Auroras are created by disruptions in the magnetosphere induced by the solar wind. The greatest times to see it are between 10 p.m. and 1 a.m.
What is aurora borealis?Auroras are created by disruptions in the magnetosphere induced by the solar wind. The paths of charged particles in the magnetospheric plasma are altered as a result of these disruptions.
These particles, primarily electrons, and protons fall to the upper atmosphere.
The greatest times to see it are between 10 p.m. and 1 a.m. when the night skies are dark and clear. It is recommended to visit between April and late August.
The greatest spots to see them are closer to the arctic circle, which encompasses Canada, Alaska, Iceland, and Greenland.
Hence the greatest times to see it are between 10 p.m. and 1 a.m.
To learn more about the aurora borealis refer to the link;
https://brainly.com/question/25766402
car 2 has a mass of 150 kg and moves westward towards car 3 at a velocity of 2.2 m/s. car 3 has a mass of 265 kg and moves eastward towards car 2 at a velocity of 1.5 m/s. calculate the force of Car 3 and Car 2. dunno if I phrased this right so I included a screenshot too. pls help asap will give brainliest
Answer:
The force of car 3 on car 2 ≈ 1810.82 N
Explanation:
The equation for the change in momentum of the two cars are;
Conservation of linear momentum
150( 2.2 - v) = 265(1.5-v)
150 × 2.2 - 265×1.5 = (150+265)v
150 × 2.2 - 265×1.5 = -67.5 = 415×v
∴ v = -67.5/415 = -0.1627 m/s West = 0.1627 m/s East
The impulse of the net force is the amount of momentum change experienced given by the equation;
Impulse force = [tex]m \times v_f[/tex] - [tex]m \times v_0[/tex]
Where;
[tex]v_f[/tex] = The final velocity
[tex]v_0[/tex] = The initial velocity
For the the 265 kg mass, we have;
[tex]v_f[/tex] = 0.1627 m/s
[tex]v_0[/tex] = 1.5 m/s
Which gives the impulse a s F×Δt = 265×0.1627 - 265×1.5 = -354.38 kg·m/s
The change in kinetic energy of the collision = 1/2×265×(0.1627^2 - 1.5^2) =-294.62 J
Whereby the distance moved in one second is 0.1627 m, we have;
Work done = Force × Distance = Force × 0.1627 = 294.62
Force = 294.62/0.1627 = 1810.82 N.
Two solid marbles A and B with a mass of 3.00 kg and 6.50 kg respectively have an elastic collision in one dimension. Before collision solid marble A (3.00 kg) was at rest and the other solid marble (6.50 kg) had a speed of 3.50 m/s. Calculate the magnitudes of velocities of two solid marbles vA and vB after collision.
Answer:
va = 4.79 m/s
vb = 1.29 m/s
Explanation:
Momentum is conserved:
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
(3.00) (0) + (6.50) (3.50) = (3.00) v₁ + (6.50) v₂
22.75 = 3v₁ + 6.5v₂
For an elastic collision, kinetic energy is conserved.
½ m₁u₁² + ½ m₂u₂² = ½ m₁v₁² + ½ m₂v₂²
m₁u₁² + m₂u₂² = m₁v₁² + m₂v₂²
(3.00) (0)² + (6.50) (3.50)² = (3.00) v₁² + (6.50) v₂²
79.625 = 3v₁² + 6.5v₂²
Two equations, two variables. Solve with substitution:
22.75 = 3v₁ + 6.5v₂
22.75 − 3v₁ = 6.5v₂
v₂ = (22.75 − 3v₁) / 6.5
79.625 = 3v₁² + 6.5v₂²
79.625 = 3v₁² + 6.5 ((22.75 − 3v₁) / 6.5)²
79.625 = 3v₁² + (22.75 − 3v₁)² / 6.5
517.5625 = 19.5v₁² + (22.75 − 3v₁)²
517.5625 = 19.5v₁² + 517.5625 − 136.5v₁ + 9v₁²
0 = 28.5v₁² − 136.5v₁
0 = v₁ (28.5v₁ − 136.5)
v₁ = 0 or 4.79
We know v₁ isn't 0, so v₁ = 4.79 m/s.
Solving for v₂:
v₂ = (22.75 − 3v₁) / 6.5
v₂ = 1.29 m/s
Which statement best describes monsoons? They force cool, moist air from oceans to rise. They are winds that blow in the opposite direction of a normal wind. They bring heavy rain in the winter and in the summer. They influence precipitation as wind moves near a mountain.
Answer:
They are winds that blow in the opposite direction of a normal wind
Explanation:
Answer:
B.) They are winds that blow in the opposite direction of a normal wind.
Explanation:
it's correct trust
What three colors can be combined to produce any color within the visible spectrum
Answer:
red, green, and blue.
Explanation:
The primary colors of light that combine to produce any color within the visible spectrum are red, green, and blue.
a ball is projected with a certain angle with initial velocity u. it covers horizontal range R. With what initial velocity it must be projected keeping the angle of projection same so its horizontal range becomes 2.25R
Answer:
1.5 u
Explanation:
The range equation is:
R = u² sin(2θ) / g
When u = v, R = 2.25 R.
2.25 R = v² sin(2θ) / g
2.25 u² sin(2θ) / g = v² sin(2θ) / g
2.25 u² = v²
1.5 u = v
What is the missing number in the nuclear reaction shown below?
+
233
92
4
2
He +
?
90
Th
Answer here
SUBMIT
Answer:
[tex]\boxed{299}[/tex]
Explanation:
In this reaction, Sum of Atomic Masses of Left side = Sum of Atomic Masses of right side
Let the atomic mass of Thorium be x
So,
233 = 4 + x
Subtracting 4 to both sides
x = 233-4
x = 229
1) (c)Describe how you would use the apparatus and what readings would you take?
I need the answer only for the '' c'' part
Answer:
A
Explanation:
What has resulted in significant climate changes?
A. Plate tectonics
B. Doppler effects
C. Water pollution
Answer:A
Explanation:glass window allow light in but trap the heat inside
A study finds that there is a positive correlation between height and math test scores. The researcher concludes that taller people are better at math. However, another researcher points out that height is also correlated with age, and age is correlated with greater knowledge of math. What issue does this example represent?
Answer:
Spurious relationship
Explanation:
In statistics a spurious relationship is a correlated mathematical relationship of covariation between two variables or more which by themselves have no cause and effect relationship as a result of a coincidence or the existence of a third or confounding factor
The variables have covariation due to their correlation but they don't have a cause and effect relationship
An example of a spurious relationship is the increase in ice cream sales when there is an observed increase in the rate of drowning.
Plz help me with question 3
Answer:
C. 110 - 140
Explanation:
Answer:
i think the best answer is c