Its speed is 4m/s
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An experiment is conducted to determine how the arm length of a pendulum affects its period. The experimental design calls for varying the length of the arm and the mass of the bob.
Which is true about this experiment, based on good experimental design?
Only the arm length should be changed. The mass should remain the same.
Only the mass should be changed. The arm length should remain the same.
The force applied to the mass should be varied for each trial.
The material the arm is made of should be varied for each trial.
Answer:
Option (I)
Explanation:
The independent varible is arm length. Therefore, to eliminate the effect of other factors and make a valid and effective conclusion, only the arm length should be changed, while other factors (mass, force and materials) should remains the same.
Answer: Only the arm length should be changed. The mass should remain the same.
Explanation:
For water, which takes more energy, melting or evaporating?
Answer:
melting
Explanation:
that works best
After the experiment, scientists organize and (blank) the data.
Does anyone know what goes in the blank? Im doing a crossword puzzle and I need help, please. (/w\)
Answer:
analyze
Explanation:
A crowbar having the length of 1.75 m is used to balance a load of 500 N. If the distance between the fulcrum and the load is 0.5 m, calculate: (Friction is neglected] i. effort applied to balance the load
ii. MA
iii. VR
iv. efficiency
Answer:
L=load LA=load arm
E=effort EA=effort arm
Jan is 1.32 meters tall. What is her height in inches?
Answer:
51.96 inches
Explanation:
Multiply 1.32 by 39.37
Answer:
52.0 inches
Explanation:
1.32 meters * 39.37 = 51.96 inches ~ 52.0 inches
Name the type of forces involved in the following situations:
a) A rolling ball stops after covering some distance.
b) A magnet attracts a piece of iron.
c) Every object in the universe is attracted to each other.
Answer:
a. Frictional force
b. Magnetic force
c. Gravitational force
Answer:
frictional force
magnetic force
gravitational force
hope this helps!
A car travels a distance of 65 km. For the first 30 minutes, it is driven at a constant speed of 70 km/hr. The motor begins to vibrate and the driver reduces the speed to 20 km/hr for the rest of the trip. The average speed for the entire trip is?
Answer : 53.3 km/hr.
explanation
If the density of a liquid is 20gcm - 3 height is 4cm and gravitational field strength is 10 N kg, the pressure of the liquid is
Answer:
Pressure is 1.96 × 10^12 Pa
Explanation:
[tex]{ \bf{pressure = \frac{force}{area} }}[/tex]
height = 4 cm = 0.04 m
density = 20 g/cm³ = 20,000 kg/m³
But for force:
[tex]{ \sf{force = mass \times acceleration}} \\ { \sf{force = ( \frac{density}{volume} ) \times acceleration}} \\ \\ { \sf{force = ( \frac{20000 }{0.04 {}^{3} }) \times 10 }} \\ \\ { \sf{force = 3.13 \times {10}^{9} \: newtons}}[/tex]
For area:
[tex]{ \sf{area = 0.04 \times 0.04 = 0.0016 \: m {}^{2} }}[/tex]
[tex] { \tt{pressure = \frac{3.13 \times {10}^{9} }{0.0016} }} \\ \\ = { \tt{1.96 \times {10}^{12} \: pascals}}[/tex]
Metallic bonds are responsible for many properties of metals, such as conductivity. Why is this possible?
Answer:
The bonds can shift because valence electrons are held loosely and move freely.
Explanation:
Ill put the rest of the answers in the comments
Answer:
The bonds can shift because valence electrons are held loosely and more freely.
HELP!!!
Explain how magnetic potential energy can be transformed into kinetic energy.
Potential energy converts kinetic energy when the range is shifting from the S pole to the N pole.
If you like, I can put in more detail!
Abishek is a runner. He runs the 100 m sprint
in 10 x 6s. What speed did he travel at?
(in m/s)
Answer:
1.67m/s
Explanation:
Total Distance to be travelled by a Runner=100m
Time Taken=10*6s
Speed=Distance/Time
=100/10*6=10/6=1.67m/s
The answer you are looking for is approximately 1.67 m/s.
Solution/Explanation:
Distance Ran: 100 m.
Time ran: 10x6s, or 60s, or one minute.
Speed: Unknown?
Writing out the formula for speed, using distance and time,
S=D/T.
S=Speed.
D=Distance.
T=Time.
Substituting the given values of the variables,
S=100 m/10x6s, or S=100 m/one minute, or S=100 m/60s.
100÷60=1.6667≈1.67.
So, therefore, the final answer is approximately 1.67 m/s.
I hope that this has helped you. Enjoy your day, and take care.
Plsss helppp me I have a lot of questions pls help me I will mark brainliest!!!
Answer:
kilo means 1000
2a. 0.1
b. 100
c.0.01
d. 0.001
3a.km
b.mL
d.cg
e.mm
g. g
h.kL
What is the kinetic energy of a bicycle with a mass of 16 kg traveling at a velocity of 5 m/s
Answer:
200J
Explanation:
K.E=½mv²
K.E=½×16kg×5m/s²
K.E=8kg×25
K.E=200J
what will happen to the gravitational force between two bodies if the distance between them is halved keeping their masses constant
help me
Answer:
if the distance between them is halved then gravitational force will be doubled....
Which of the following is true about scientific laws?
Answer: Scientific theories are never proven.
Explanation:
The graphic in the section "What Are The Steps In The Scientific Method?" shows a step between experimenting and drawing a conclusion. Based on the article, what is the explanation for this detail? (A) the need to include both dependent and independent variables in every experiment (B) the need to write down procedures carefully so others can carry out the same experiment (C) the need to repeat an experiment many times to test results before drawing a conclusion (D) the need to evaluate the meaning of the experiment's results before drawing a conclusion
There are several models that outlines the scientific method, which is
based on formulating an hypothesis to answer observed phenomena, and
testing the hypothesis to see if it is correct
The correct option for the explanation for the step between experimenting and conclusion is option D
(D) The need to evaluate the meaning of the experiment's results before
drawing a conclusion
The steps in the scientific method are designed to help solve existing
problems and they include;
Make an observation Ask a question or make a question statement based on the observationResearch and gather information background or existing sourcesHypothesis formulationTest or experiment design, performance and data collectionObservation and analysis of resultDraw conclusion; if hypothesis is true report result. If hypothesis is false, formulate another hypothesisReport resultThe step that comes between experimenting and conclusion is the
analysis of the experimental result to extract the information from the raw
experimental data, so as to evaluate the hypothesis and also the
procedure of the experiment. After the analysis, conclusion is drawn and
reported followed a new hypothesis is formulated or the existing
hypothesis is expanded upon, Therefore, the correct option is option D.
The need to evaluate the meaning of the experiment's results before
drawing a conclusion
Learn more about the scientific method here:
https://brainly.com/question/17216882
If a 2kg metal slug is heated with 1275J of energy which raises its temperature 15K, what is the metal's specific heat capacity?
Answer:
42.5J/kgk
Just use the formula
C = Q/m x change in temp
why cannot an athlete stop instantaneously when he reaches the end in after the race
Explanation:
because his lower body is in inertia of motion.
Hope it helps
A stone of mass 600g is thrown vertically upwards. calculate the value of the gravitational force on the stone at its highest point. take g = 10N/kg
Answer:
6N
Explanation:
F = m × g
= 0.6 × 10
= 6N
to find the force you first have to convert the mass to kg by dividing 600 by 1000 giving you 0.6
then you can multiply the mass times the gravity giving you a gravitational force of 6N
-. JC=BFF© cough medicine is marketing its' new medicine called "Devil Red". They
want to know why religious customers seem to avoid their product.
Religious customers seem to avoid their products because;
they have a negative view and understanding of the name "Devil."When selling a product to potential customers, the brand name of that product could affect sales negatively or positively.
Religious people do not view the devil in a positive manner because they believe that he is responsible for the suffering in the world.
The already existing bias they have in their minds about that name will make them reject any product bearing the name. They might even reason that this medicine will worsen their sickness. For this reason, the medicine called "Devil Red" will have a poor reception by religious people.
Summarily, religious people avid the medicine called Devil Red because they have a negative view of the devil.
Learn more about brand names here:
https://brainly.com/question/15682332
4. A woman from Pasadena makes a trip to a nearby shopping mall that is located 40 miles from her home.
On the trip to the mall she averages 80 mi/hr but gets a speeding ticket upon her arrival. On the return
trip she averages just 40 mi/hr. What was her average speed for the entire trip?
Taking into account the definition of speed, you get that the average speed of the entire trip is 53.33 [tex]\frac{mi}{hr}[/tex] .
It is necessary to know that speed is a quantity that expresses the relationship between the space traveled by an object and the time used for it.
In other words, speed can be defined as the amount of space traveled per unit of time with which a body moves and can be calculated using the expression:
[tex]speed= \frac{distance traveled}{time}[/tex]
In this case, you know that the shipping mall is 40 miles from the woman's house and that she is going to the mall and back home. So it runs the 40 miles of distance twice. So the distance traveled is 80 miles.
On the other hand, you know that on the trip to the mall she averages 80 [tex]\frac{mi}{hr}[/tex]. Since the woman travels the first 40 miles at that speed, and taking into account the definition of speed, the time it takes to go to the shopping mall is calculated as:
[tex]80\frac{mi}{hr} = \frac{40 mi}{time}[/tex]
Solving:
time× 80 [tex]\frac{mi}{hr}[/tex]= 40 mi
[tex]time = \frac{40 mi}{80\frac{mi}{hr}}[/tex]
time=0.5 hr
Finally, you know that on the return trip she averages just 40 [tex]\frac{mi}{hr}[/tex]. Since the woman travels the second 40 miles at that speed, and taking into account the definition of speed, the time it takes to return to her home is calculated as:
[tex]40\frac{mi}{hr} = \frac{40 mi}{time}[/tex]
Solving:
time× 40 [tex]\frac{mi}{hr}[/tex]= 40 mi
[tex]time = \frac{40 mi}{40\frac{mi}{hr}}[/tex]
time=1 hr
Then, the total time of the trip, which consists of going to the shopping mall and returning home, is calculated as:
total time= 0.5 hr + 1 hr
total time= 1.5 hr
Finally, taking into account the definition of speed, average speed of the trip is calculated as:
[tex]speed= \frac{80 miles}{1.5 hr}[/tex]
Solving:
speed= 53.33 [tex]\frac{mi}{hr}[/tex]
In summary, the average speed of the entire trip is 53.33 [tex]\frac{mi}{hr}[/tex] .
Learn more about average speed:
brainly.com/question/15273551 brainly.com/question/9834403?referrer=searchResultswhat is the difference between the two reactions that can occur during radioactive decay?
what are gamma rays and what are its uses??
"Gamma rays" is the name that we call the shortest of all electromagnetic waves. They're shorter than radio waves, microwaves, infrared waves, heat waves, visible light waves, ultraviolet waves, and X-rays. They extend all the way down to waves that are as short as the distance across an atom.
Being so short, they carry lots of energy. They can penetrate many materials, and they can damage living cells and DNA. They're dangerous.
The sun puts out a lot of gamma radiation. The atmosphere (air) filters out a lot of it, otherwise there couldn't even be any life on Earth.
As soon as astronauts fly out of the atmosphere, they need a lot of shielding from gamma rays.
You know the precautions we take when we're around X-rays. The same precautions apply around gamma rays, only a lot more so.
It's only in the past several years that we've learned how to MAKE gamma rays without blowing things up. Also, how to control them, and how to use them for medical and industrial applications.
Explanation:
Gamma rays are ionizing electromagnetic radiation, observed by the decay of an atomic nucleus.
Uses of gamma rays :
Sterilize medical requirements. Sterilize food Used as traces in medicine Gamma ray astronomy.For which length of wire are the readings of resistance the most precise
how is light reflected from a prism
Answer:
White light entering a prism is bent, or refracted, and the light separates into its constituent wavelengths. Each wavelength of light has a different colour and bends at a different angle. The colours of white light always emerge through a prism in the same order—red, orange, yellow, green, blue, indigo, and violet.
pls answer this pls
pls
Answer:
b
Explanation:
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A 10cm tall object is placed perpendicular to
the principal axis of a convex lens of focal length
30cm. The distance of the object from the line is
20cm.find the i)position ii)nature and iii) size of
the image formed.
My answer is in the picture
Swipe the pictures to see the others
Math is used in the sciences because (1 point)
A numbers are the best way to understand scientific ideas.
B it is a universal means of communicating scientific information.
C scientific data is quantitative.
D scientific data requires significant figures.
Which option is the appropriate scientific unit for distance?
A) Foot
B) meter
C) mile
D) yard
Which tools do investigations in Earth and space science use?
A) computer and field
B) internet and laboratory
C) computer, laboratory and field
D) computer, internet, laboratory, and field
Answer:
1. it is universal means of communicating scientific information
2. meter
3. computer, internet, laboratory, and field
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
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...