Answer:
A) basic units of matter
B) Protons, neutrons, electrons
C) In the nucleus
D) In the nucleus
E) Outside of the nucleus
Explanation:
Answer:
A-Atoms are the basic units of matter and the defining structure of elements.
B-Atoms are composed mainly of protons, neutrons, and electrons.
C and D-Protons and neutrons are found in the nucleus.
E-outside nucleus=eletron location,
Electrical charge is a fundamental aspect of matter. It has two different types called positive and negative (these are just conventional names, there’s nothing special about being positively charged vs. negatively charged). It has the peculiar property where like charges (two positive or two negative) will repel each other while two opposed charges (one each of positive and negative) will attract each other.
Hope this helps!
From Earth stars appear very dim, but in space they are quite bright. From Earth we are seeing the stars
A) absolute magnitude
B) apparent magnitude
C) available magnitude
D) absent magnitude
Answer:
B
Explanation:
9. A coin rolls off the edge of a table that is 89 meters above the floor and lands 2.88 meters from the bottom o
the table
A. How much time is the coin in the air?
Answer:
0.43 seconds
Explanation:
A ball is thrown vertically upward with an initial velocity of 29.4 m/s². What is the maximum height reached by the ball? How long is the ball in the air? What is the final velocity of the ball before it goes back to its original position?
Answer:
Most likely it will reach 29.4 up in the air before coming back down.
Explanation:
The force of the ball will be the same on how high it will go.
HURRY PLEASE!!!
Which of the following demonstrates the result of waves traveling at
different speeds when moving from one medium to another?
A. The absence of any sound in outer space
B. The bending of light as it moves from air to water
C. The movement of ocean currents as the earth rotates
D. The up and down motion of a collided metal spring
Answer:
B.
Explanation:
The one that demonstrate the result of waves traveling at different speeds when moving from one medium to another is the bending of light as it moves from air to water. The correct option is B.
What is bending of light?Even though waves travel at different speeds through different mediums, light bends or is refracted as it travels from one medium to another.
The degree to which it bends is referred to as the index of refraction. Light bends more as the index of refraction increases.
The change in direction of waves that occurs when they travel from one medium to another is referred to as refraction.
Refraction is always accompanied by a change in wavelength and speed. The bending of waves around obstacles and openings is known as diffraction.
The bending of light as it moves from air to water is an example of the result of waves traveling at different speeds when moving from one medium to another.
Thus, the correct option is B.
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When the air resistance can be ignored the velocity of an object dropped initially from rest is given by following equation where g is free fall acceleration
g*t^2/2
g*t
g*t/2
g
Answer:
v = gt
Explanation:
From the question given, we obtained the following information:
Initial velocity (u) = 0 m/s
Acceleration due to gravity (g) = g
Time (t) = t
Final velocity (v) =.?
Thus, we can obtain the velocity as illustrated below:
v = u + gt
v = 0 + gt
v = gt
Thus, the equation for the velocity is
v = gt
The vector V is at a 72° angle and has a magnitude of 12.
Describe this vector using vector notation (Use the & and symbols.) (6 points)
Question 9
What is the angle of the vector described below? (3 points).
Please answer all questions will mark brainliest and give 5 stars
V=2x+3y
Answer:
Part 1
The vector can be expressed as follows;
r = 12, θ = 72°, ·v = (12, ∠72°), ·v ≈ 3.71·[tex]\mathbf{\hat i}[/tex] + 11.41·[tex]\mathbf{\hat j}[/tex] or
[tex]\mathbf{\cdot v}=\begin{bmatrix}3.71\\ 11.41\end{bmatrix} = \begin{pmatrix}3.71\\ 11.41 \end{pmatrix}[/tex]
Part 2
The angle of the vector is 56.31°
Explanation:
Part 1
The given parameters are;
The direction of the vector = 72°
The vector magnitude = 12
Therefore, the vector can be described in the following forms;
Polar form
1) Direct notation;
r = 12, θ = 72°
2) Ordered set
·v = (12, ∠72°)
Rectangular vector notation;
1) Unit vector notation
·v = vₓ[tex]\mathbf{\hat i}[/tex] + [tex]v_y[/tex][tex]\mathbf{\hat j}[/tex]
Where;
vₓ = 12 × cos(72) ≈ 3.71
[tex]v_y[/tex] = 12 × sin(72) ≈ 11.41
Therefore;
·v ≈ 3.71·[tex]\mathbf{\hat i}[/tex] + 11.41·[tex]\mathbf{\hat j}[/tex]
2) Matrix notation
[tex]\mathbf{\cdot v}=\begin{bmatrix}3.71\\ 11.41\end{bmatrix} = \begin{pmatrix}3.71\\ 11.41 \end{pmatrix}[/tex]
Part 2
The given vector is V = 2·x + 3·y
Therefore, the angle of the vector, θ = tan⁻¹(y/x) = tan⁻¹(3/2) ≈ 56.31°
The angle of the vector = 56.31°.
What must an object have in order to exert a gravitational field?
Answer:
power
Explanation:
What are the reactants in the reaction? What are their properties?
In a reaction, reactants are the substances on which the reaction takes place. The reactants undergo changes to form the products.
In any reaction, the atoms of the reactants and the products are the sameThe only difference is the way these atoms are bound to each other through chemical bondsDuring the reaction, there is a rearrangement of the atomsConsider the following reaction:
C + O₂ ---> CO₂
In the above reaction, carbon and oxygen are the reactantsWe can see that the atoms on both sides of the reaction are the same, the only difference is the way they are bondedCarbon undergoes combustion and reacts with oxygen gas to form carbon dioxide gasLearn more about chemical reactions here:
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A tortoise and a hare are having a 1,000-meter race. The tortolse runs the
race at a constant speed of 0.023 m/s. The hare moves at an average speed
of 1.50 m/s for 10.0 minutes and then decides to take a nap. After waking up
from the nap, the hare recognizes that the tortoise is about to cross the
finish line and immediately accelerates from rest with a constant acceleration
of 0.500 m/s2 for the remaining distance of the race. If both racers finish
simultaneously, what is the time in hours that the hare napped?
Answer:2 hours
Explanation:
A wooden box is pushed with 100 N towards North
direction, and from the opposite side another 100 N is
applied towards South direction. What is the net force?
A jet airliner moving initially at 693 mph (with respect to the ground) to the east moves into a region where the wind is blowing at 798 mph in a direction 37◦ north of east. What is the new speed of the aircraft with respect to the ground? Answer in units of mph.
Answer:
The new speed of the aircraft with respect to the ground is 1414.3 mph.
Explanation:
Given that,
Angle = 37°
Velocity of jet airliner = 693 mph
Velocity of wind = 798 mph
We know that,
The new velocity of the aircraft with respect to the ground
[tex]v=v_{a}+v_{w}[/tex]
We need to calculate the new speed of the aircraft with respect to the ground
Using formula for velocity
[tex]v=\sqrt{(v_{a})^2+(v_{w})^2+2v_{a}v_{w}\cos\theta}[/tex]
Put the value into the formula
[tex]v=\sqrt{(693)^2+(798)^2+2\times693\times798\cos37}[/tex]
[tex]v=1414.3\ mph[/tex]
Hence, The new speed of the aircraft with respect to the ground is 1414.3 mph.
An airplane flies with a constant speed
of 720 km/h. How far can it travel in
3 hours
Answer:
2160 km/h
Explanation:
720 times 3 gives you the answer
convert 9.2 km to m
Answer:
9,200 m
Explanation:
1 kilometer = 1000 meters so if there is 9 kilometers then it is 9000 meters, then .2 kilometer is equal to 200 meters. Add the numbers together to get 9,200 meters
Answer the following:
You are going to race your friend to a tree near the back of the playground. The tree is 24 meters away from where you stand. It will take you 4 seconds to reach the tree. What will your average speed be?
Answer:
1. 6 m/s.
2. 320 miles.
Explanation:
1. Determination of the average speed.
Total distance travelled (D) = 24 m
Total time (t) = 4 s
Average speed =.?
Average speed is simply defined:
Average speed = Total distance /total time
Average speed = 24/4
Average speed = 6 m/s
2. Determination of the distance travelled by the train.
Speed = 40 mph
Time = 8 h
Distance =?
Speed is simply defined as:
Speed = Distance /time
40 = Distance / 8
Cross multiply
Distance = 40 × 8
Distance = 320 miles
Therefore, the train travels a distance of 320 miles.
how many bags of pineapples did joey buy if he bought 8 pineapples. each bag holds three pineapples.
Answer:
3 BagsExplanation:
1) Since the bags hold three pineapples
2) we can also hold two pineapples in one bag.
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The question is “Which direction will the airplane move” plz help :,)
From the information in the picture, it's not possible to select any of the choices on the list.
-- Knowing the horizontal and vertical forces on the plane, we can't tell what direction it will move. We can only tell what direction it will accelerate.
The net horizontal force is (200N right) - (50N left).
. . . That's 150N to the right, so the plane accelerates to the right.
The net vertical force is (175N up) - (75N down).
. . . That's 100N upward, so the plane accelerates upward.
-- We can't tell the compass direction of the net force, because the picture doesn't tell us the compass direction of the horizontal forces.
If a 100n force has a 60-degree angle pulling on a 10kg block for 5m, what's the work done on the object
Answer:
250J
Explanation:
Given parameters:
Force on block = 100N
Degree of pull = 60°
Mass of block = 10kg
Distance = 5m
Unknown:
Work done on the object = ?
Solution:
The workdone on a body is the force applied to move a body in a specific direction;
Workdone = force x distance cos Ф
Insert the parameters and solve;
Workdone = 100 x 5 cos 60°
Workdone = 250J
Brady connected the lose wire to the battery and created an electromagnet as shown below. He picked up 45 thumb tacks with his electromagnet, though his goal was to pick up 50 thumb tacks. What could Brady do to increase the strength of his electromagnet and pick up more thumbtacks?
Answer:
He will have to use two batteries instead of just one.
Explanation:
The way Brady could increase the strength of his electromagnet and pick up more thumbtacks is for him to increase the current. He can achieve this either by adding a second battery or by adding more coils of wire.
This is because using 2 batteries will make the amount of current in the coils to increase and this will in turn produce a higher electromagnetic field in the nail.
plants have organelles called
Answer:
chloroplasts
Explanation:
Plants have chloroplasts which are plastids that contains chlorophyll and photosynthesis takes place.
Pete the Penguin loves to sled down his favorite hill. If he hits a speed of
50 m/s after 5 seconds, what is his rate of acceleration? Hint: He starts at
O m/s at the top of the hill.
Answer:
10 m/per second
Explanation:
he speeds up 10 m in a single second
I don't want the answer i just need help on figuring out how to solve this!
Jose Altuve hits a fastball with a velocity of 49.1 m/s (109.9 mph) at an angle of 22º. If left field is 96 m (315 ft) away, will this be a home run?
Answer:
Yes, it will be a Home Run
Explanation:
(Note : It is assumed that the collision between bat and ball is perfectly elastic.)
( Also I don't know anything about baseball, so I checked the dimensions online, which are minimum 325 ft (left and right field foul pole) and minimum 400 ft centre field fence)).
STEP 1
Find Horizontal Range of Projectile
[tex]R = \frac{ {u}^{2} \sin(2 \alpha ) }{g} = \frac{(49.1)^{2} \sin(44°) }{g}[/tex]
[tex]R = 170.8 \: m \: = 560.3 \: ft[/tex]
Therefore, the ball will travel 560.3 ft horizontally well beyond 400 ft (largest dimension of the field), and it'll be a Home Run.
in an electrically neutral atom
Answer:
A proton and an electron have an equal amount but an opposite type of charge. Thus, if an atom contains equal numbers of protons and electrons, the atom is described as being electrically neutral
Answer:
Explanation:
Atoms are electrically neutral because they contain equal quantities of positively charged protons and negatively charged electrons. Electrons and protons have equal but opposite charges, so the result is no net charge. Ions are atoms that have gained or lost electrons. As a result, ions have a net charge.
Which type of wave is not reflected by the ionosphere?
Answer:
skip zone
Explanation:
7. Which of the following is created when an
enclosed fluid is squeezed?
A. buoyancy
B. convection
st
C. pressure
D. gravity
Answer:
Pressure
Explanation:
the answer is pressure
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Tom has been hired to deliver 11 m3 of sand. If the truck that Tom is driving has a truck bed that is 2.5 m X 1.6 m, X 0.75 m how many trips will Tom need to complete the order?
PLS GO TO MY PROFILE TO SEE THE OTHER QUESTIONS I POSTED I GIVE BRAINLY THING FOR THOSE AS WELL THANK YOU
Answer:
About 3 trips
Explanation: if we do 2.5m*1.6m*0.75 it equals to 11000 then we divide that to 11m3 and it gives you 3.6 so it will be about 3 times
Thx
My Exit Ticket
The color of the Sun is more orange and red at sunrise and sunset and more yellow at noon. What is the main
factor that causes the change in color?
the scattering of short wavelengths as light
passes through the atmosphere
the change in the amount of the sunlight's
energy
the chabge in density in the atmosphere
the change in temperature in the
atmosphere
Windows
< Check My
e
Answer:
the scattering of short wavelengths as light
passes through the atmosphere
A downed pilot fires a flare from a flare gun. The flare an initial speed of 250 m/s and is fired at an angle of 35° to the ground. Find the maximum height the flare will reach. How long does it take for the flare to reach its maximum altitude ? What will be the final vertical velocity ?
Answer:
Maximum Altitude: vi = 250 m/s At the maximum height q = 35° vy,f = vy,i − g∆t = 0 g = 9.81 m/s2 vy,i = vi (sin q) = g∆t ∆t = vi (si g n q) = (250 9 m .8 / 1 s) m (s / i s n 2 35°) ∆t = 15 s
Vertical Velocity: Vyf = 439.09
Explanation:
The time it will take to reach its maximum altitude will be 14.63 seconds, and the final vertical velocity will be 143.4 m/s.
What is Speed?Velocity is the pace and direction of an object's movement, whereas speed is the time rate at which an object is travelling along a path. In other words, speed is a scalar value, but velocity is a vector.
The velocity at time t = 0 is known as the initial velocity (u). It is the rate at which motion initially manifests itself.
On the other hand, the final velocity is a vector number that represents the speed and direction of a moving body after it has experienced its maximum acceleration.
According to the question, the given values are :
Angle, θ = 35°
V₀ = 250 m/s
[tex]V_o_y=V_osin\theta[/tex]
[tex]V_o_y[/tex] = (250)(sin 35°)
= 250 × 0.573
[tex]V_o_y[/tex] = 143.4 m/s.
Now, the time it will take to reach its maximum height will be :
[tex]t_m_a_x=V_o_y/g[/tex]
= 143.4 / 9.8
[tex]t_m_a_x[/tex]= 14.63 seconds.
Hence, the time it will take to reach its maximum altitude is 14.63 seconds.
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Water flows into a swimming pool at the rate
of 5.25 gal/min.
If the pool dimensions are 33.8 ft wide, 40 ft
long and 11.1 ft deep, how long does it take to
fill the pool? (1 gallon = 231 cubic inches)
Answer in units of min.
Answer:
t = 12.37 [min]
Explanation:
In order to solve this problem we must first convert units of gallons to cubic feet.
[tex]V = 5.25\frac{gal}{min}*231\frac{ft^{3} }{1gal} \\V = 1212.75[\frac{ft^{3} }{min} ][/tex]
where:
V = volumetric flow = 1212.75 [ft^3/min]
And the volume of the pool can be calculated as follows :
v = 33.8*40*11.1 = 15007.2 [ft^3]
The volumetric flow is equal to:
V = v/t
where t is the time
t = v/V
t = 15007.2/1212.75
t = 12.37 [min]
Riding your skateboard, it takes 12 seconds to speed up from 2 m/s to 8 m/s. Find the acceleration.
Which of the three objects is the largest? Explain your answer.
Answer:
isn't it the first one
Answer:
The object in figure C is a planet, so it is the largest object. Planets are larger than comets and asteroids.
Explanation: