Answer:
A) Thermometer
Explanation:
Thermometer is a health care device that works on the principle of expansion of matter as temperature increases. The thermometer is made with mercury and it expands when human body acquires unusual temperature. The expansion mercury is followed for detection of human body temperature. Two types of scales are used in this device.
What is its displacement ?
Answer:
d
Explanation:
A race car starts from rest and accelerates uniformly to 69 mph in 4.5 s.
Determine the acceleration of the car in units of m/s2
A. 0.0 m/s2
B. 0.15 m/s2
C. 4.9 m/s2
D. 6.9 m/s2
4. In a crime scene sketch, there should always be an arrow to show which direction?
a. South
b. North
c. West
d. East
Answer:
i think it d
Explanation:
Ummmm ya girl needs help
hydrogen: 4
nitrogen: 4
oxygen: 12
this should be correct
PLEASE HELP. I'LL GIVE BRAINLIEST TO CORRECT ANSWER.
There are several ways to model a compound. One type of model is shown.
4 C's are connected in a line by 3 black lines. The C on the left has 3 H's attached to it each by a black line. The next C has 1 H attached by a black line and 1 O attached by 2 black lines. The next C has 2 H's attached to it by 1 black line each. The last C has 2 H's attached to it by 1 black line each and 1 O attached by a single black line. That O has an H attached to it by 1 black line.
What is the chemical formula for the molecule represented by the model?
CHO
C4H9O2
C4H8O
C3H8O2
Answer:
C
Explanation:
Edge2020
A bus makes a 10-kilometer journey through town. It's top speed is 50 km/h and it's mean speed is 16kn/h. Explain why these speeds are different.
Somebody pls help me with this question!
Answer:
speed are different at different places
Explanation:
because it's top speed is 50km/h,so it's initial speed may be less. when it covers some distance it's speed changes again. then we have given a mean speed .mean speed means sum of all speed divided by sum of total time.so the mean speed and final speed differs from each other
what sould you do after losing a game
Answer:
Rage :)
Raging lets ur anger out :)
Answer:
After losing a game in whatever it is, you should figure out what you did wrong to lose whatever game you lost and practice more at it. You should also have good sportsmanship because it builds teamwork, character, respect, honor in whatever you are playing.
Hope this helped :)
Once a person passes the age of 65, he or she should stop exercising.
Please select the best answer from the choices provided.
ОТ
OF
Answer: False
People age 65 and older still need exercise. Although the intensity of each workout won't be as high compared to younger ages. Everyone needs exercise to keep their heart healthy, to lower the bad cholesterol, etc.
Answer:
no
Explanation:
very false
Will mark brainliest
Answer: Wouldn't it just be her blocks all walked in an hour added together?
Explanation: 5+2+3+2=12 so 12 blocks an hour?
For accelerated motion (the velocity is constantly changing),
the position vs time graph will be a...
A. Zero slope line
B. Unable to determine
C. Curved line
D. Constant slope line
Answer:
C
Explanation:
it means there is a change in the velocity plz mark brainliest
how many molecules are in 3 moles of CO2
Answer:
1.806 x 10^24 molecules
Explanation:
1 mole of CO2 has 6.02 x 10^23 molecules
3 mole of CO2 has 3x6.02x10^23 molecuels = 1.806 x 10^24 molecules
The 3 mole of [tex]CO_{2}[/tex] contains [tex]1.8066*10^{24}[/tex] molecules.
One mole of [tex]CO_{2}[/tex] contains [tex]6.022*10^{23}[/tex] molecules.
In 3 moles of [tex]CO_{2}[/tex] ,
[tex]=3*6.022*10^{23}=1.8066*10^{24}[/tex] molecules.
Hence, the 3 mole of [tex]CO_{2}[/tex] contains [tex]1.8066*10^{24}[/tex] molecules.
Learn more:
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A rubber stopper attached to a string is travelling in a circular path above a students' head. If the radius of the circle that the stopper is travelling is 0.5m and it takes 2.0 s for the stopper to make one complete revolution, what is the velocity of the rubber stopper?
Answer: 1.57 m/s
Explanation:
How much does a 200 kg car weigh?
Answer:
42,000 lbs
Explanation:
100 kg is 210 lbs.
200 x 210 lbs =
42,000 lbs
The weight of the car is product of its mass and acceleration due to gravity of earth. Hence, the weight of the 200 kg car is 1960 N.
What is acceleration due to gravity ?The gravitational force of an object is the force by which attracts other objects into its center of mass. Earth attracts every objects into its center and that is why we are all standing on the ground.
The weight we experience on earth is due to this gravitational force and it decreases when we move far from earth. The acceleration due to gravity is the acceleration by which an object accelerates downwards due to earth's gravity (g).
Weight of an object = mass × g
g for earth = 9.8 m/s²
mass of the car = 200 Kg.
then, weight = 200 kg × 9.8 m/s² = 1960 N.
Therefore, the weight of the car is 1960 N.
Find more on gravitational force:
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my grandma lives in a one story house, entirely pink
the couch is pink
the counter is pink
the carpet is pink, etc
What color are the stairs?
Answer:it’s a one story house so no stairs
Explanation:
Answer:
There are no stairs because Grandma lives in a one story house
Explanation:
A 40 kg girl is pushing a 40 kg boy in a 20 kg toy wagon. The wagon is moving at a constant speed of 2.0 m/s. Calculate the combined kinetic energy of the boyWhat is the acceleration of a 50 kg object pushed with a force of 500 newtons?
Answer:
Combined kinetic energy =120 joules
Acceleration= [tex]10 m/s^2[/tex]
Explanation:
Given that the mass of the girl= 40 kg.
The mass of the boy= 40 kg.
The mass of the wagon = 20 kg.
The combined velocity of the boy and the wagon, v= 2.0 m/s.
The kinetic energy of any object having mass m and moving with the speed of v m/s, is
K.E.= [tex]\frac 1 2 mv^2[/tex].
Here, the combined mass of the boy and the wagon = 40 + 20 = 60 kg.
So, the combined kinetic energy of the boy and the wagon
[tex]=\frac 12 60 \times 2^2= 120[/tex] J
When a force is applied on the object having the mass m, then
F=ma,
where a is the acceleration produced in the object.
Here, F=500 newtons and m= 50 kg.
so, [tex]500=50\times a[/tex]
[tex]\Rightarrow a = 500/50=10 m/s^2[/tex].
Hence, the combined energy is 120 joules and the acceleration is 10 [tex]m/s^2[/tex].
A tow truck pulls a 1,500-kilogram car with a net force of 4,000 newtons. What is the acceleration of the car?
help me please?
Answer:
a = F/M = 4000/1500 = 2.66m/s^2
The acceleration of the car is 2.6667 m/s²
To calculate the acceleration, mass is given as m = 1500 kg
Force = 4000 Newtons
What is acceleration?Acceleration is the change in velocity for the given period of time.
a=dv/dt
or
=(v2-v1)/(t2-t1)
Acceleration can be defined as a net force on an object is directly proportional to the magnitude of the force in the same direction and is inversely proportional to the mass of the object.
The unit of acceleration is meter / second²
This is the definition based on the Newton's second law.
F = ma
acceleration, a = F / m
= 4000 N / 1500 kg
= 2.6667 m/s²
Thus, acceleration can be calculated as 2.6667 m/s².
Learn more about acceleration,
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What kind of small objects composes much of the universe?
- Atoms
- Dark Matter
- Anti-Matter
why the hell not 86 points
Answer:
what I dont understand
A push of magnitude P acts on a box of weight W as shown in the figure. The push is directed at an angle θ below the horizontal, and the box remains a rest. The box rests on a horizontal surface that has some friction with the box. The normal force on the box due to the floor is equal to
Answer:
its on wheels and they are supposed to make it eas
Explanation:
What is the velocity of a 0.06
kg ball moving with 75 J of energy?
Answer:
The ball moves at 50 m/s
Explanation:
Kinetic Energy
Is the energy that it possesses an object of mass m due to its motion at speed v. The kinetic energy is calculated as follows:
[tex]\displaystyle K=\frac{1}{2}m\cdot v^2[/tex]
If we know the value of the kinetic energy and need to calculate the speed, we can solve it for v:
[tex]\displaystyle v=\sqrt{\frac{2K}{m}}[/tex]
Since the ball has a mass of m=0.06 kg and moves with a kinetic energy of K=75 Joule:
[tex]\displaystyle v=\sqrt{\frac{2\cdot 75}{0.06}}[/tex]
[tex]\displaystyle v=\sqrt{\frac{150}{0.06}}[/tex]
[tex]\displaystyle v=\sqrt{2500}[/tex]
v=50 m/s
The ball moves at 50 m/s
Answer:50m/s
Explanation:divide
Henry mixed salt and water together in a cup until he observed a clear solution. He measured the mass of the solution. Then he placed the cup outside for several sunny days during the summer. After a week, he observed that only solid salt remained in the cup and the mass had decreased. Henry concluded that a physical and chemical change occurred in this investigation.
Which statements correctly defend or dispute his conclusion?
A- He is correct. Dissolving salt in water is a physical change, but evaporating the water is a chemical change. Formation of a solid is evidence that a chemical change occurred.
B- He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.
C- He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.
D- He is incorrect. Dissolving salt in water and evaporation of the water are both chemical changes. The reappearance of salt is evidence that the change was reversible by a chemical change, so it could not be a physical change.
Answer:
B- He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.
Explanation: Dissolving Salt in water is a Chemical Change, Because the Salt arrangement is different in solid state than dissolved in water. As we can see in the image below, once the Salt is dissolved, it is separated into its ions, Na+ and Cl- Now, The evaporation process is a physical change, because the water doesn´t change its configuration H20 and it only changes its form, as we can see in the image below.
Answer:
B) He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.
Explanation:
hope this helps!! :)
What’s the kinetic energy of the object? Use .
Erica is competing in the shot put event at a track meet. She hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. The shot’s kinetic energy is
joules.
Answer:
18joules
Explanation:
1/2 of 4=2
2 multiply by 9= 18 joules
Help ASAP pls!!! will mark brainliest!!!
Match each term to the appropriate definition
A high-speed train travels with an average speed of 227 km/hr. The train travels for 2 hours. How far does the train travel?
Answer:
454 kmExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × time
From the question we have
distance = 227 × 2
We have the final answer as
454 kmHope this helps you
Can someone help me plz
Answer:
-
Explanation:
Why do you think plants surround the seeds with a yummy fruit?
Answer:Cross-pollination is two plants that work together to pollinate and self-pollinate is when a flower pollinates itself. ... Why do you think plants surround the seeds with a yummy fruit? To protect the seeds so that they can reproduce. How is cross-pollination different from self-pollination?
Explanation:
Plants seeds and fruits are the outcome of fertilization.Gymnosperms and angiosperms both produce seeds.
What is cross-pollionation?Cross-pollination, also known as heterogamy, is a form of pollination in which egg cells pollen are transmitted from one soil's cones or flowers to another's omelette cones or flowers.
Cross-pollination occurs in both angiosperms and gymnospermsand it aids in cross-fertilization and outbreeding.
Plants seeds and fruits are the outcome of fertilization..Gymnosperms and angiosperms both produce seeds.
In angiosperms, the ovary develops into the fruit, while the ovules grow into the seeds that are encased within the fruit.Gymnosperms and angiosperms both produce seeds.
Hence plants seeds and fruits are the outcome of fertilization.Gymnosperms and angiosperms both produce seeds.
To learn more aboutv the cross-pollionation refer to the link;
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Why do many people want to use renewable energy like solar energy or hydroelectric energy instead of energy from coal?
pls help asap will mark as brainliest if correct!
Answer:
Explanation:
Solar energy is efficently present naturally , whereas coal and natural gas are more efficient by reliable applications, things like coal and natural gases are also non renewable they also cause pollution .so using solar enery are better than coal and natural gases.
4. The earth exerts a gravitational force of 3.5 N on an object. What is the mass of
the object in kilograms? *
Answer:
I'm not sure
Explanation:
sorry I'm not smart that's why I have this app
Answer:
(3.5N)/(10) = 0.35
Explanation:
If the escalator pulls you up a slope of 30.0o and moves with a velocity of 3.10m/s. What is the vertical component of your velocity? What is the horizontal component of your velocity?
Answer:
[tex]1.55\ \text{m/s}[/tex]
[tex]2.68\ \text{m/s}[/tex]
Explanation:
v = Velocity of the elevator = 3.1 m/s
[tex]\theta[/tex] = Angle of the slope = [tex]30^{\circ}[/tex]
Vertical component is given by
[tex]v_y=v\sin\theta\\\Rightarrow v_y=3.1\sin30^{\circ}\\\Rightarrow v_y=1.55\ \text{m/s}[/tex]
The vertical component of the velocity is [tex]1.55\ \text{m/s}[/tex].
Horizontal component is given by
[tex]v_x=v\cos\theta\\\Rightarrow v_x=3.1\times \cos30^{\circ}\\\Rightarrow v_x=2.68\ \text{m/s}[/tex]
The horizontal component of the velocity is [tex]2.68\ \text{m/s}[/tex].
What is the momentum of a 10 kg object traveling at 4 m/s?
