Answer:
1.c
2.b
3.d
4.a
Explanation:
There are your answers
Answer:
Sodium---Malleable, soft, and shiny
Silicon---Has properties of both metals and nonmetals
Bromine---Highly reactive gas
Argon---Nonreactive gas
What is the phase of water when its temperature is 150 °C?
A. Solid
B. Liquid
C. Gas
D. None of the above.
Answer:gas
Explanation:
The phase of water when its temperature is 150 °C is gas. Hence, option (C) is correct.
What are the phases of substance?Phase is a term used in thermodynamics to describe an amount of matter that is chemically and physically uniform or homogeneous, can be mechanically separated from a nonhomogeneous mixture, and may consist of a single material or a combination of substances.
Although crystalline, colloid, glassy, amorphous, and plasma phases are thought to exist, the three basic phases of matter are solid, liquid, and gas (vapor). A phase change is defined as the transformation of a phase from one form to another.
As the boiling point of water is 100° C, the phase of water when its temperature is 150 °C is gas. Hence, option (C) is correct.
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Give two examples of mixtures in which the physical properties of the ingredients, or substance, are maintained, or NOT changed, when they are mixed together
Answer: Examples are --- Water and oil , nails and sand and are called Heterogeneous mixtures ,
Explanation:
A mixture is a combination of two or more substances without a chemical reaction which individual components having retain their properties, We have two types of mixtures
Homogeneous-- Is a mixture, whether solid liquid or gas that contains proportions in such a way that one can hardly identify each components by looking eg --air, ink etc
Heterogeneous- Is a mixture in which the physical properties of individual components are maintained eg --- Rice and beans , water and oil, nails and sand.
Convert 1.2m = ____mm
Answer:
1.2m = 1200 mm
Explanation:
The answer is looks easy, but 1 Meter (m) is equal to 1000 millimeters (mm). To convert meters to mm, multiply the meter value by 1000.
does uniform acceleration means increasing acceleration?
Sunspots are dark areas on the surface of the Sun. They mark strong magnetic fields, and more sunspots indicate that the Sun is more active and is releasing more energy. The following graph presents the average daily number of sunspots from 1900 through 1944. Each data point is the average for one month.
Notice the series of peaks and troughs in the graph. The time from one minimum (trough) to the next is called a Solar Cycle. Solar Cycles can be anywhere from 9 to 14 years long.
What can be predicted with the most certainty from this graph?
A.
The next minimum in the graph will be in 1953.
B.
The average daily number of sunspots will peak in 1949.
C.
The average daily number of sunspots in 1949 will be 80.
D.
The average daily number of sunspots will increase throughout 1945.
Answer:
D
Explanation:
study island. first answer is wrong
The average daily number of sunspots will increase throughout 1945. therefore the correct answer is option D.
What is a solar system?It is a system in which the sun's gravitational attraction causes all the planets and celestial bodies to revolve around it.
As specified in the issue statement On the surface of the Sun are spots known as sunspots. Increased sunspots imply that the Sun is more active and is producing more energy since they are a sign of strong magnetic fields.
The average daily number of sunspots from 1900 to 1944 is shown in the graph below. The average for each data point is for one month.
The graph's sequence of peaks and valleys should be noted. A solar cycle is the period of time from one minimum (trough) to the next. Solar cycles can last from nine to fourteen years.
Thus, The average daily number of sunspots will increase throughout 1945, therefore the correct answer is option D.
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Init. A
almatien
Quiz 1
As shown in the figure below, Justin walks from the house to his truck on a windy day. He walks 20 m
toward the truck, 15 m back to retrieve his wind-blown hat, and another 20 m to reach the truck. He
walked a total time of 75 s.
20 m
15 m
20 m
What is Justin's average velocity over the 75 s period?
Answer:
v = 1/3 m / s = 0.333 m / s
in the direction of the truck
Explanation:
The average speed is defined by the variation of the position between the time spent
v = Δx / Δt
since the position is a vector we must add using vectors, we will assume that the displacement to the right is positive, the total displacement is
Δx = 20 - 15 +20
Δx = 25 m
therefore we calculate
v = 25/75
v = 1/3 m / s = 0.333 m / s
in the direction of the truck
As shown in the figure below, Justin walks from the house to his truck on a windy day. He walks 20 m toward the truck, 15 m back to retrieve his wind-blown hat, and another 20 m to reach the truck. He walked a total time of 75 s.
Answer:
What is Justin’s average velocity over the 75 s period?
Answer: 0.33 m/s
What is Justin’s average speed over the 75 s period?
Answer: 0.73 m/s
Who is the father of physics?
Answer:sir Isaac Newton is known as the father of physics.
Explanation:
Convert 2,000 m ______ km
Answer:
[tex]2km[/tex]
Explanation:
[tex]1,000 m=1 km[/tex]
So if you have [tex]2,000m[/tex], there will be [tex]1km[/tex] per [tex]1,000m[/tex].
Therefore:
[tex]2000m=2km[/tex]
Represent the following sentence as an algebraic expression, where "a number" is the
letter x. You do not need to simplify.
The product of 5 and the difference of 9 and a number.
Answer:
não sei.................
One fifth of the difference between a number and one is given to us in this line. This must be written as an algebraic expression. Now that this number is expressed as a letter x difference.
What algebraic expression number is the letter x?Thus, a number that is 5 more than x is equal to x+5. As a result, “5 more than a number” is represented by the algebraic expression “x+5”. The right response is therefore “x+5”.
We don't know what the value of the variable x is, but it can have any value. Since it is a constant number that is utilized with the variable term and is clearly defined, 5 is referred to as the coefficient of x.
Therefore, It can be calculated as 1, divided by 5, multiplied by the entity that is present. For the response to the query is 1 multiplied by x, minus 1, multiplied by 5 divided by 1.
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You wish to push a cart across a friction less surface, so you
apply a 20 N force for a period of 3 seconds. As a result, the
cart goes from rest to a velocity of 2.3 m/s. What is the mass of
the cart?
Answer:
Explanation:
a= (2.3 m/s) / (3.0s) = 0.77 m/s2F= ma20.0 N = m (0.77 m/s2)m = 26 kgForce is measured with?Newtons (N) --> 1 N = 1 kg m/s2
Examine the diagram of the cell cycle.
Which label identifies the stage in which the DNA is
copied and the cell grows?
Y
Z
Ow
OX
X
O z
W
Answer:
W
Explanation:
its the longest period of time
If the acceleration of a motorboat is 4.0 m/s2, and the motorboat starts from rest, what is its velocity after 6.0 s?
Answer:
The velocity of the motorboat after 6s is 24 m/s.
Explanation:
Given;
acceleration of the motorboat, a = 4.0 m/s²
initial velocity of the motorboat, u = 0
time of motion of the motorboat = 6s
Apply the following kinematic equation to determine the velocity of the motorboat after 6 ;
v = u + at
v = 0 + (4 x 6)
v = 24 m/s
Therefore, the velocity of the motorboat after 6s is 24 m/s.
Two cars - Car A and Car B - drive in the same direction down a street. Car B is traveling at 30 m/s. Car A is traveling 20 m/s. Imagine that you're sitting inside Car A and Car B passes you. What is the velocity of Car B relative to you? Don't forget UNITS.
Answer:derp
Explanation:
Which careers typically require post-secondary education other than vocational school? Check all that apply. Boiler Operation Construction Management Architecture Repair Work Civil Drafting Carpentering
Answer: Construction management, Architecture, Civil Drafting.
Explanation: hope this helps :)
Construction Management, Architecture and Civil Drafting are careers typically require post-secondary education other than vocational school. So, the correct options are B, C and E.
What is Career?Career is defined as a person's metaphorical "journey" through learning, work and other aspects of life where there are many ways to define career and the term is used in different ways.
A career is defined as the variety of experiences that we have had throughout our lives. As we gain more experience in the world of work and life, we build careers. We take into account career paths education, training and paid or unpaid work. Construction Management, Architecture and Civil Drafting are careers typically require post-secondary education other than vocational school.
Therefore, the correct options are B, C and E.
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Distance v. Time
What is the velocity at 1 meters?
4.5
4
3.5
3
2.5
Distance (m)
2.
1.5
1
0.5
0
0
2
6
8
10
Time (s)
Answer:
4
(m)
2 ( s )
Explanation:
ok...........
1. What precaution should an acrobat athlete take to do skywalk?
2. Which car is more stable - an F1(formula one) car or a double decker - explain your answer why?
3. Describe how to measure center of mass of an irregular object.
How can we calculate the speed we sprint jog or walk without a radar gun
Answer:Distance and displacement
Explanation:
Academic integrity only relates to a. Online learning c. Instances of cheating b. All subjects d. Any academic situation I give brainliness
Answer:
answer is d.
Explanation:
are you going to mark me brainlinessist
Please someone helppp me.. I will mark as brainliest.
Answer:
b) G.P.E = Mgh
300j = M x 10 m/s² x 15 m
300 j/ 10 m/s² x 15 m = M
300j/ 150 s² = M
2kg = M
c) K.E = 1/2 m v²
K.E = 1/2 (50) (50)²
K.E = 1/2 (50) (2500)
K.E= 125000/2
K.E = 625 000 J
an ice cube is placed in the sun later there is a puddle of water later still the.puddle is gone what kind of change has occured
Clear question is;
An ice cube is placed in the sun. Later there is a puddle of water. Later still the puddle is gone. What kind of change has occurred?
Answer:
Physical change.
Explanation:
There are two type of changes called physical change and chemical change.
In Physical changes, there is only change in the appearance of the substance and not its chemical composition. Whereas, in Chemical changes the substance changes entirely into another substance with a new chemical formula.
Now, for the ice cube, it has melted from a solid state to a liquid state. Thus, there is only a change in appearance and not its chemical composition. Thus, it's a physical change that has occurred.
a kid is running at an average speed of 6.8mi/h. how long does it take this kid to run a mile? convert to meters
Answer:
t = 8.82 minutes
Explanation:
The average speed of an object is given bu the total distance covered divided by total time taken.
The average speed of a kid is 6.8 mi/h
Let t is the time taken by this kid to run a mile, d = 1 mile
[tex]v=\dfrac{d}{t}\\\\t=\dfrac{d}{v}\\\\t=\dfrac{1\ \text{miles}}{6.8\ \text{mi/h}}\\\\t=0.147\ \text{hour}[/tex]
or
t = 8.82 minutes
So, it will take 8.82 minutes to run a mile.
A car accelerates from rest at 7.55 m/s2 for 4.25 s.
Determine the final velocity of the car.
And calculate the cars displacement.
Explanation:
This problem is on the motion of a car.
given data.
acceleration a=7.55m/s
time t= 4.25 sec
1. Determine the final velocity of the car.
we know that
acceleration= velocity/time
substituting our given data we have
7.55= v/4.25
v=7.55*4.25
v=32.08m/s
2. calculate the cars displacement.
we also know that
velocity= distance/time
distance= velocity*time
distance= 32.04*4.25
distance= 136.37m
help quick plzz i need help
see attached file below
Explanation:
The velocity vs time graph is linear from 0s to 2s, so the acceleration is constant.
Can you ever absolutely prove that a hypothesis is correct? Explain.
Yes you can, with using scientific experiment.
Ask a question -- Do background Research -- Construct a Hypothesis --Test with an Experiment -- Procedure working? -- Yes or no? -- Analyze Data and Draw Conclusions
With an experiment you can discover if its correct or not.
Hope this helps ! <3
A car is traveling at 100 km/h. How many minutes will it take to cover a distance of 750 km?
Answer:
7.5 minutes (you mean hours)
t = 7.5 min (if it was actually not hours than put minutes just letting u know.)
Explanation:
The first thing you have to do is know the equation; it is t = d/s, which is time = distance divided by speed. Know fill in the equation, now it will be t = 750 km/100 km/ hr ( in this min). If you divide it, then the answer will be t = 7.5 min (which it has to be hours instead of min because hours makes more sense than minutes.)
The car will take 7.5 hours to cover a distance of 750km.
What are Speed and velocity?Speed is defined as the rate over time at which an object is moving along a path, while velocity is defined as the rate and direction of motion of an object. Speed is a scalar quantity as it has only magnitude, no direction but Velocity is a vector quantity as it has both magnitude as well as direction.
Speed can be expressed as:
Speed= Distance travelled/ Time taken
Velocity can be expressed as:
Velocity= Displacement travelled/ Time taken
Both the quantities are expressed as meter per second (m/s).
If the two values are given , we can calculate the another value like in the above given information, speed of the car = 100km/hr and distance travelled by the car= 750 km.
So, Time taken= 750/100 = 7.5 hours
Thus, the car will take 7.5 hours to cover a distance of 750km.
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A car travels 200 miles in 8 hours calculate the cars speed
Answer:
25 mi/hr
Explanation:
Distance = 200 miles
Time = 8 hours
[tex]Speed = \frac{Distance}{Time}[/tex]
Substitute values into the given equation and solve.
[tex]Speed = \frac{200}{8} \\\\Speed = 25 \:miles/hour[/tex]
A car travels 200 miles in 8 hours is 25 miles/h (25 mph).
What is Speed?The speed of an object is defined as the magnitude of change of its position with time or the magnitude of change of its position per unit time. It is a scalar quantity which has only magnitude , no direction.
It can be expressed as:
[tex]s = \frac{d}{t}[/tex]
s = speed
d = distance traveled
t = time elapsed
The SI unit of speed is metre per second. (m/s)
For above given information,
Distance = 200 miles
Time= 8 hours
So, speed will be 200 miles/ 8 hrs
Speed = 25 miles/hr or 25 mph.
Thus , a car travels 200 miles in 8 hours is 25 miles/h (25 mph).
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2. The speed of light is 299,792,000m's. What is the speed in km's?
Answer:
299 792 kilometers
Explanation:
household chores are a good way to fit exercise into your everyday ruotine
Answer:TRUE
Explanation:
It’s counts as moving around so yes exercise
The friction of the water on a boat produces an acceleration of -10 m/s2. If the
boat is traveling at 30 m/s and the motor is shut off, how long does it take the boat
to slow down to 5.0 m/s?
a
2.5 s
b 2.35
c
2.2 s
d
2.0 s
Answer:2.5s
Explanation:
Idk I guessed and got it right
Friction is the force that exists between two surfaces that are sliding or attempting to slide across each other.
The acceleration produced by the friction of water is a = [tex]-10 m/s^2[/tex]
The boat takes 2.5 seconds to slow down.
What causes of friction?Surface roughness: When two rough surfaces collide, they generate frictional force or an opposing force, which can sometimes be converted into heat. Body deformation: Deformations in the body or the surface of the body in contact may cause friction during motion.Friction is the force that exists between two surfaces that are sliding or attempting to slide across each other. For example, friction makes it difficult to push a book across the floor. Friction always acts in the opposite direction that the object is moving or attempting to move.The equation that rules the change of velocities is:
[tex]V = V _0 + at[/tex]
Where:
a = acceleration
Vo = initial speed
v = final speed
t = time
The acceleration produced by the friction of water is a = [tex]-10 m/s^2[/tex] and the boat is initially traveling at v=30 m/s. When the motor is shut off, the boat will start braking until it stops. We need to find the time it takes to ready the final speed of v=5 m/s.
t = [tex]\frac{V - V_0 }{a}[/tex] = -5-30 /10 = 2.5 s.
The boat takes 2.5 seconds to slow down.
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