Answer:
The best method to test this with is the buoyancy technique. The buoyancy technique puts force on an object that is equal to the weight of the fluid replaced by the object.
Hope this helps :D
Give an example for each of the following, where the force:
a) changes the direction of a moving object.
b) changes the speed of a moving object.
c) changes the shape and size of an object.
d) stops a moving object.
e) moves a stationary object.
Explanation:
A cricket player hitting the ball from opposite direction.A footballer kicking ball with more force.Heating of a plastic bottle.Applying brake of a car.rolling a stopped marble on a table.a). The gravitational forces between the Earth and the Sun bends the Earth's motion along a curving path instead of a straight line.
b). The gravitational forces between the Earth and a falling rock make the rock fall faster and faster.
c). The force of a pressurized stream of hot air makes a balloon get rounder and bigger.
d). The gravitational forces between the Earth and a rock tossed straight up make the rock go slower and slower, and eventually stop. (In the next instant, it starts falling, as described in answer-b.))
e). The acoustic and emotional force of your mother's voice 15 minutes before the school-bus arrives causes you to turn over, sit up, and start putting on your socks.
Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group VIA?(1 point)
one covalent bond
two ionic bonds
three metallic bonds
four covalent bonds
Answer:four covalent bonds
Explanation:
It’s right
an experiment involving the scientific method begins with a/an:
Answer:
Step 1. Make observations.
Step 2. Form a hypothesis.
Step 3. Make a prediction.
Step 4. Perform an experiment.
Step 5. Analyze the results of the experiment.
Step 6. Draw a conclusion.
Step 7. Report your results.
Explanation:
The first step in the Scientific Method is to make objective observations. These observations are based on specific events that have already happened and can be verified by others as true or false. Step 2. Form a hypothesis.
Our observations tell us about the past or the present. As scientists, we want to be able to predict future events. We must therefore use our ability to reason.
Scientists use their knowledge of past events to develop a general principle or explanation to help predict future events. The general principle is called a hypothesis. The type of reasoning involved is called inductive reasoning (deriving a generalization from specific details).
A hypothesis should have the following characteristics:
• It should be a general principle that holds across space and time
• It should be a tentative idea
• It should agree with available observations
• It should be kept as simple as possible.
• It should be testable and potentially falsifiable. In other words, there should be a
way to show the hypothesis is false; a way to disprove the hypothesis.
Some mammals have two hind limbs would be a useless hypothesis. There is no observation that would not fit this hypothesis!
All mammals have two hind limbs is a good hypothesis. We would look throughout the world at mammals. When we find whales, which have no hind limbs, we would have shown our hypothesis to be false; we have falsified the hypothesis.
When a hypothesis involves a cause-and-effect relationship, we state our hypothesis to indicate there is no effect. A hypothesis, which asserts no effect, is called a null hypothesis. For instance, the drug Celebra does not help relieve rheumatoid arthritis.
Adam is driving his truck at 18 m/s for a distance of 46 m, how much time was Adam driving?
Answer:
2.6 seconds
Explanation:
You have to divide the distance by the velocity to find the time:
46/18 = 2.55 ≈ 2.6 seconds
The answer you are looking for is approximately 2.6 seconds.
Solution/Explanation:
To get the correct answer, you must divide the distance and velocity.
This means that 46÷18=2.5556.
2.5556≈2.6.
So, therefore, the final answer is approximately 2.6 seconds.
I hope that this has helped you. Enjoy your day, and take care.
11 An unstretched spring is 12,0 cm long. A load of 5.0N stretches it to 15.0cm. How long will it be under a load
of 15N? (Assume that the spring obeys Hooke's law.)
Answer: Approximately 22 cm
=========================================================
Explanation:
The unstretched spring is 12.0 cm long. When adding a load of 5.0 N, it stretches to 15.0 cm. This is a displacement of 15.0 - 12.0 = 3.0 cm, which is the amount the spring is stretched.
Convert this displacement to meters (so that it fits with the meters unit buried in Newtons).
3.0 cm = (3.0)/100 = 0.03 m
Apply Hooke's Law to find the spring constant k
F = -kx
5.0 = -k*(0.03)
k = -(5.0)/(0.03)
k = -166.667 approximately
Now we must find the displacement x when F = 15 newtons
F = -kx
-kx = F
x = F/(-k)
x = -F/k
x = -15/(-166.667)
x = 0.089 approximately
x = 0.1
The displacement to one decimal place is about 0.1 meters, which converts to 100*0.1 = 10 cm
So the spring will be stretched to about 12cm+10cm = 22 cm
The apparent bending of a wave around the edge of an object is called _____. If a wave passes through a slit that has a width of the same order of magnitude as its _____, it will bend around both edges of the slit to give a semicircular wave.
Answer:
Diffraction and Wavelengyh
What is the Unit Of Electric current and Who is the Unit named after??
Pls help Asap
Answer:
Amperes
Explanation:
It is named after a French physicist André-Marie Ampère.
HOPE THIS HELPED
The unit of electric current is Ampere, and it is named after the French physicist André-Marie Ampère (1775 - 1836).
Hope it's helpfulA glacier advances at 8 x 10-6 cm/s.
How far will it move in 6.6 y?
Answer in units of cm
I don’t know what to put in the boxes below
Answer:
What boxes are you talking abt?
0.054x2.33x90............
please mark this answer as brainlist
what are the major parts of the ear?
Explanation:
1.The parts of the ear include:
External or outer ear, consisting of: Pinna or auricle. This is the outside part of the ear. ...
2.Tympanic membrane (eardrum). The tympanic membrane divides the external ear from the middle ear.
3.Middle ear (tympanic cavity) , consisting of: Ossicles. ...
4.Inner ear , consisting of: Cochlea.
Explanation:
The major parts of ear are:-
1) Outer ear
PinnaExternal auditory canalTympanic membrane2) Middle ear
MalleusIncusStapes3) Inner ear
CochleaSemicircular canalsVestibuleplzz can anyone solve this
plzzzz guys tomorrow is my exam ..
plzz
Answer:
i hope it helped U
stay safe stay happy
Please help ???????.......
Answer:
300,000=3×10^3
.000012=1.2×10^-6
State which type of variable is plotted on the x-axis
and which type is plotted on the y-axis.
Answer:
Often the independent variable is plotted on the x-axis - and example might be time (an experiment where time is measured by a watch or an independent mechanical device)
The dependent variable is often plotted on the y-axis - and example here might be the velocity or the acceleration,
It may be the responsibility of the experimenter to determine the value of the dependent variable by some type of measurement
ASAP If the initial pressure of a gas is 100 kPa, initial volume is 1.0 L, and final pressure is 25 kPa, what is the final volume?
When no one answers your question...
The final volume is 4.0 liters.
We can calculate the final volume with Boyle's law:
[tex] P_{i}V_{i} = P_{f}V_{f} [/tex] (1)
Where:
[tex] P_{i}[/tex]: is the initial pressure = 100 kPa
[tex] V_{i}[/tex]: is the initial volume = 1.0 L
[tex]P_{f}[/tex]: is the final pressure = 25 kPa
[tex]V_{f}[/tex]: is the final volume =?
Hence, the final volume is:
[tex] V_{f} = \frac{P_{i}V_{i}}{P_{f}} = \frac{100 kPa*1.0 L}{25 kPa} = 4.0 L [/tex]
Therefore, the final volume is 4.0 liters.
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Which statement is true?
A. When a gas condenses to a liquid, it absorbs energy.
B. When water boils, it releases energy.
C. When ice melts, it absorbs energy.
D. When water freezes, it absorbs energy.
Explanation:
The correct answer is option B
Answer:
C. When ice melts, it absorbs energy.
Explanation:
When ice melts, it is getting hotter by absorbing energy and changes from a solid to a liquid. This is an endothermic reaction.
Which of the following statements most accurately differentiates potential and kinetic energy?
A. Kinetic energy is a form of mechanical energy, while gravitational potential energy isn't.
B. Gravitational potential energy is a form of mechanical energy, while kinetic energy isn't.
C. Any object that has motion has potential energy, while any object not in motion but with the potential to do work has kinetic energy.
D. Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.
Answer:
D) Both parts are true.
Hey there, hope my answer helps :)
Answer: D) Any object that has motion has kinetic energy, while any object not in motion but with the potential to do work has potential energy.
The larger the number of charges flowing through the wire, the larger is the ____________ flowing in the wire.
Answer:
The larger the number of charges flowing through the wire,the larger is the current flowing in the wire.
Explanation:
if the wire is large then large amount of current flows through the circuit.but if the wire is small then a smaller amount of current will pass through.
I hope this helps
On January 22, 1943, the temperature in Spearfish, South Dakota, rose from −4°F to 45°F in just 2 minutes. What was the temperature change in Celsius degrees?
27.2 C°
40.1 C°
35.4 C°
18.7 C°
If a diver displace water with a weight of 500N what is the upthrust on the diver?
Answer:
500N
Explanation:
Basically the weight of water displaced is the amount of upthrust. The upthrust is equal to the weight of the water moved by the submerged part of the body and therefore is equal to 500N.
Hope this helps!
What does v or vf stand for? What SI units are used to measure it?
Answer:
Below
Explanation:
In my experience, vf means final velocity, and v would be the average velocity!
You would write it as ΔV (delta V)
The SI units that are used to measure it are m/s
Hope that helped!
v and vf stand for velocity and final velocity respectively. its SI unit is to measure it is m/s.
What is velocity & Acceleration ?Velocity is "rate in change of displacement with respect to time".
i.e. v= dx/dt. It is denoted by v.
it is also defined as displacement divided time. i.e. v= Displacement÷Time.
Velocity shows how much distance can be covered in unit time. It's SI unit m/s.
Acceleration is rate in change of velocity with respect to time.
i.e. a = dv/dt
if an object changes its velocity in short time, we can say that it has greater acceleration.
a= dv/dt =Δv/Δt = [tex]\frac{v_{i} - v_{f} }{t_{i}-t_{f} }[/tex]
where [tex]v_{i}[/tex]= initial velocity of an object
[tex]v_{f}[/tex]= final velocity of an object
t₂= initial time of an object
t₁ = final time of an object
Hence v is stands for velocity and vf is stand for final velocity,
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d) All of the
The volume of solid is measured in
a) Litters
b) Grams
c) Cubic centimeters
d) All of the above
a) Liters ... It COULD be. The "Liter" is a perfectly good unit of volume, but it's typically used for liquids and gases, not solids.
b) Grams ... definitely NOT. The "gram" is a unit of mass, not volume.
c) Cubic centimeters ... Yes. This is a unit of volume.
d) All of the above ... No.
The volume of solid is measured in
a) Litters
b) Grams
c) Cubic centimeters
d) All of the above
SCIENCE
A student wants to try to convince her parents to stop serving peas for dinner. She lays out her argument that peas are high in fructose, which is a type of sugar. Which test could she use to provide scientific evidence to support her argument that peas are high in fructose?(1 point)
brown paper bag test
vinegar test
Benedict’s test
iodine test
Answer:Benedict’s Test
Explanation:
The student will use Benedict's test to support her argument.
The common reagents for testing carbohydrates are iodine and Benedicts test.
While iodine gives a positive result with starch, it doesn't react with fructose.
Benedict's reagent is used to determine the presence of reducing sugar in a given solution.
A positive test with Benedict's reagent is determined by a color change from clear blue to brick-red with a precipitate.
A reaction between fructose and Benedict's solution gives a positive test from the color change which occurs when the fructose is reduced to simple sugar such as glucose and mannose.
Thus, the student will use Benedict's test to support her argument.
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a string with fixed ends is made to go into standing wave patterns. at a given tension, the lowest frequency for which a certain pattern exists is 150 Hz. which of the following frequencies would also cause a standing wave pattern in this case?
Answer:
700 hz
Explanation:
Who has the greater velocity, an astronaut who has just completed an orbit of the Earth or you when you have just traveled from home to school? Explain.
Answer:
the answer is
Explanation:
constant acceleration
because when the object's velocity is changing then the object is accelerating or decelerating
as acceleration describe changing of velocity so the answer is constant acceleration
Acceleration is defined as the rate of change of velocity.
Acceleration = (Change in velocity) / time taken
Acceleration = (Final velocity - initial velocity) / time
As the object velocity changes by the same amount in each second, it means the acceleration is constant.
Hope I can help u
7. A train is traveling with an initial velocity of 20.1 m/sec. If the brakes can apply a maximum
acceleration of -0.0500 m/sec”, how long will it take the train to stop?
The time that takes for the train that is traveling with an initial velocity of 20.1 m/s to stop is 402 seconds.
The time that will take for the train to stop can be calculated with the following kinematic equation:
[tex] v_{f} = v_{i} + at [/tex] (1)
Where:
[tex] v_{f}[/tex]: is the final velocity = 0 (when it stops)
[tex] v_{i}[/tex]: is the intial velocity = 20.1 m/s
a: is the acceleration = -0.0500 m/s²
t: is the time =?
By solving equation (1) for t, we have:
[tex] t = \frac{v_{f} - v_{i}}{a} = \frac{0 - 20.1 m/s}{-0.0500 m/s^{2}} = 402 s [/tex]
Therefore, it will take 402 seconds for the train to stop.
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pls help question are in the picture
What happens to the weight of an object when it is taken from Earth to the Moon? why ?
Answer:
So, if a body is taken to moon, the moon attracts the body with a force less as compared to the attraction force by the earth. Hence the weight decreases.
Explanation:
Hopefully it is helpful...Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms. What is her velocity?
Answer:
45/30
Explanation:
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Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms. then her velocity would be 1.5 meters per second
What is momentum?It can be defined as the product of the mass and the speed of the particle, it represents the combined effect of mass and the speed of any particle, and the momentum of any particle is expressed in Kg m/s unit.
Mathematically the formula of the momentum is
P = mv
where P is the momentum of the particle
m is the mass of the particle
v is the velocity by which the particle is moving
As given in the problem Nikki has a momentum of 45 Kilogram meters per second and a mass of 30 Kilograms
P = 45 Kilogram meters per second
m = 30 Kilograms
By substituting the values of the momentum and the mass in the formula of the momentum
P = mv
45 = 30 ×v
v = 45/30 meters per seconds
v = 1.5 meters per seconds
Thus, Nikki weighs 30 kilograms and moves at a 45 kilogram per the second momentum. subsequently, her velocity would be 1.5 meters per second.
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In science, work is defined as:
force multiplied by the distance moved in a direction perpendicular to the force.
force multiplied by the distance moved in a direction parallel to the force.
the mass of an object multiplied by its acceleration.
the mass of an object multiplied by the force required to move it.
Answer:
Yes
Explanation: Thats exactly how it goes
