What is the difference between regular electricity and static electricity
A man is crossing a river of width 100 m on a motorboat. The velocity of the motor boat is 4 m/s eastward and the velocity of the water current is 3 m/s northward. What is the resultant velocity of the boat and how much time will it take for the man to reach the other shore of the river?
Answer:
The resultant velocity of the boat = 5 m/s
The time it will take for the man to reach the other shore of the river = 25 s
Explanation:
width of river = 100 m
The velocity of the motorboat = 4 m/s eastward
The velocity of the water current = 3 m/s northward
The resultant velocity of the boat is:
R^2 = 4^2 + 3^2
= √ (4^2) + (3^2)
= √16 + 9
=√25
= 5 m/s
The time it will take for the man to reach the other shore of the river is:
d = 100 m
v = 4 m/s
t = d / v
t = 100 / 4
t = 25 s
The first periodic table was organized by
atomic number
atomic mass
chemical name
chemical symbol
In the 5.12 Lab: Design a Thermos 1 (k12) HELLPPPP PLEASEEEE!!!!
Did each thermos work as you expected it to? What would you change to improve your design?
In designing a thermos, it is important to minimize heat loses or gain by convection, conduction and radiation.
What is a thermos?A thermos is a container which is designed such that it keeps hot substances hot and cold substances cold.
A thermos can be designed to keep liquids or solids.
In designing a thermos, it is important to minimize heat loses or gain by convection, conduction and radiation.
Insulating materials are used to prevent heat loss by conduction, and convection.
And a vacuum layer is included design to minimize heat loss by radiation.
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if a load of 24n is moved by applying an effort of 6n to the machine what is the m.a of the machine
Answer:
4N
Explanation:
[tex]mechancal \: advantage = \frac{load}{effort} \\ ma \: \: \: \: \: = \frac{24}{6} \\ mechanical \: advatage = 4 \: newton[/tex]
What is the distance between two points on a wave called
Explanation:
Wavelength is the distance between two consecutive and equivalent points on a wave. Wavelength can be quantified by measuring the distance between two equivalent and consecutive points, such as the distance between two peaks or two troughs. The scientific symbol for wavelength is a Greek letter called lambda.
A group of students investigate the acceleration of ball through a
plastic tube. The apparatus they use is shown in Figure 3.
timer
light gate
Plan an experiment to find out how changing the height of the tube
affects the acceleration of the ball. In your answer, include the
variables that must be kept the same
Answer:
Adam is the name given in Genesis 1-5 to the first human. Beyond its use as the name of the first man, adam is also used in the Bible as a pronoun, individually as "a human" and in a collective sense as "mankind".
What effect charged objects have on uncharged objects
Answer:
Uncharged objects: In spite of what the standard says, an uncharged object will not be attracted or repelled from a charged object. Instead, the charged object will cause the uncharged object to become charged, with a positive charge on one side and a negative charge on the other side. This process is called induction.
Explanation:
Which of the following is/are correct about light?
A.
Light energy travels as waves.
B.
Light always travels at the same speed.
C.
Light cannot travel through liquids.
D.
all of these
Answer:
D
Explanation:
Answer:
A
Explanation:
according to what i was tought in physics light travels in wave
What is the resultant of a pair of forces, 100N, upward and 75N, downward?
Answer:
25N
Explanation:
100 - 75 = 25
That should be right if im not dumb...
The resultant of the given forces will be "25 N".
Force:Another element applies a force on one component. This same concept of a force isn't restricted to living as well as non-living entities.
All objects can exert a force towards or against another item, as well as all objects might well be impacted by pressures.
According to the question,
The pair of forces,
Upward = 100 N
Downward = 75 N
Now,
The resultant pair will be:
= [tex]100-75[/tex]
= [tex]25[/tex] N (Upward)
Thus the response above is the appropriate.
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Pls see attachment and answer. If u don't know the answer ignore
The total energy input is equal to the useful energy output.
Hope this helps!
Help in this and thx for answering it or if it is helpful
How to find kinetic energy with force, mass, and distance
Answer:
Explanation:
Set the equations for work and kinetic energy equal to each other. Work equals force times distance and kinetic energy equals one-half the mass of the object times its velocity squared, so F_d = (m_ ÷ _2)_v2. Substitute the measurements for force, distance and mass into the equation.
The energy an object has as a result of motion is known as kinetic energy.
What is Kinetic energy?A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force.
After the work is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is the type of energy that is transferred and is dependent on the mass and speed attained.
The square of the object's velocity determines the kinetic energy. In other words, when an object's velocity twice, its kinetic energy quadruples.
Therefore, The energy an object has as a result of motion is known as kinetic energy.
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Heat is distributed through the atmosphere by winds
True
False
Answer:
True!
Explanation:
Hope this helps!
Dimension of Impulse in physics
Two rams run toward each other. One ram has a mass of 49 kg and runs west
with a speed of 7 m/s, while the other has a mass of 52 kg and runs east with
a speed of 9 m/s. What will the momentum of the system made up of the two
rams be after they collide? Assume the total momentum of the system is
conserved.
A. 125 kg-m/s west
B. 125 kg-m/s east
C. 811 kg m/s west
D. 811 kg-m/s east
Answer:
D. 125 kg-m/s east
Explanation:
N
W E
S
momentum of box moving east: 52 * 9 = 468 kg-m/s east
momentum of box moving west: 49 * 7 = 343 kg-m/s west
so finally moving towards, 468 - 343 = 125 kg-m/s east
4. Dr. Copus is in charge of the cognition department at the University of Wisconsin-Madison. A new drug named Mem-Reen has become available that might be able to improve people's memories. Dr. Copus puts half of her existing patients on the drug for two weeks while giving the other half of her patients a placebo (a fake drug). She then gives both groups a memory test and compares the scores. Afterwards, Dr. Copus analyzes the scores to determine if the memory drug worked. Independent Variable: _____________________________ Dependent Variable: ___________________________________ Experimental Group: _______________________________ Control Group: _________________________________________ 3 constants: ____________________________________________________________________________________________________________
Answer:
See the answer below
Explanation:
Independent variable: Type of drug (Mem-Reen or placebo)
Dependent variable: memories
Experimental group: The group that was given Mem-Reen
Control group: The group that was given placebo
Constants: Food, hours of sleep, memory test procedures.
The independent variable is an input variable that produces effects on the dependent variable. As the variable is changed, it produces different effects on the dependent variable.
The dependent variable is the actual variable that is measured during an experiment. It is the main purpose of setting-up of an experiment.
The experimental group is also referred to as the treatment group while the control group is the group that does not receive treatment at all or they receive fake treatment/placebo.
Constants are unchanging variables included in experiments. They remain unchanged both in the treatment and the control group, otherwise, the outcome of the experiment will be unreliable.
What is kinetic energy? (99 points)
A.thermal energy
B.the energy of radiation
C.stored energy
D.the energy of motion
Answer:
its D
Explanation:
The kinetic energy is the energy of motion.
What is kinetic energy?
The energy an object has as a result of motion is known as kinetic energy. A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed.
An item in motion has energy, which is called kinetic energy. Motion in space, you walking down the street, and the rotation of the planet around the sun are all examples of kinetic energy. Kinetic energy has the following formula: K.E. = 1/2 m*v², where m is the object's mass and v is its square velocity.
Any object in motion is using kinetic energy, so the energy of motion is
kinetic energy.
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Brandy has built a computer model of a weather system. She has included information about bodies of water, the Sun, and the atmosphere. Brandy decides to decrease the amount of atmospheric water vapor in her model. How will this likely affect the precipitation in her model?
A.
There will be less precipitation.
B.
There will be more precipitation.
C.
It will rain constantly.
D.
The precipitation will not change.
Answer:
there will be less precipitation because there is less water vapour
Explanation:
1. If d = 25 m and t = 10 s, what is v?
Answer:
velocity = displacement /time
v= d/t
v= 25/ 10
v = 2.5 m/s
Explanation:
hope this help
Is the answer I provided correct
Answer:
yea, force is mass x acceleration
5x-2=3 -5 + 4y = 9 solve the system of equiations
Answer:
[tex]x=1,y=\frac{7}{2}[/tex]
Explanation:
Given the following question:
[tex]5x-2=3[/tex]
[tex]-5+4y=9[/tex]
To solve a system of equations we must start by solving the first equation for x, and then we substitute the value of x in in the second equation and then solve for y to find the value of both variables.
[tex]5x-2=3[/tex]
[tex]-5+4y=9[/tex]
[tex]-2+2=0[/tex]
[tex]3+2=5[/tex]
[tex]5x=5[/tex]
[tex]5x\div5=x[/tex]
[tex]5\div5=1[/tex]
[tex]x=1[/tex]
Substitute and solve the second equation:
[tex]x=1[/tex]
[tex]-5+4y=9[/tex]
[tex]-5+5=0[/tex]
[tex]9+5=14[/tex]
[tex]4y=14[/tex]
[tex]4y\div4=y[/tex]
[tex]\frac{14}{4} =\frac{7}{2}[/tex]
[tex]y=\frac{7}{2}[/tex]
Your answers are "x = 1, and y = 7/2."
Hope this helps.
Answer:
x=1 and y=7/2Explanation:
To solve this problem, isolate the term of x from one side of the equation.
5x-2=3 and -5+4y=9
5x-2=3First, add by 2 from both sides.
5x-2+2=3+2
Solve.
3+2=5
Rewrite the problem down.
5x=5
Divide by 5 from both sides.
5x/5=5/5
Solve.
5/5=1
x=1
-5+4y=9First, add by 5 from both sides.
-5+4y+4=9+5
Solve.
9+5=14
4y=14
Divide by 4 from both sides.
4y/4=14/4
Solve.
14/2=7
4/2=2
Rewrite as a fraction.
y=7/2
Dividing is another option.
7/2=3.5
y=7/2
Therefore, the correct answer is x=1 and y=7/2.
I hope this helps you! Let me know if my answer is wrong or not.
A marine weather station detects waves which are 15 meters long and 2.4 meters high and travel a distance of 75.0 meters in 30 seconds. Determine the amplitude, the speed, the period and the frequency of these waves.
For a detected wave that is 15 meters long and 2.4 meters high and travel a distance of 75.0 meters in 30 seconds, the amplitude, speed, period, and frequency is mathematically given as
V=2.0m/s
A=1.2m
f=0.13Hz
T=7.5sec
What is the amplitude, speed, period, and frequency of these waves.?The amplitude of the wave is the distance from the middle to the crest or through
Hence
Amplitude=wave height/2
A=2.4/2
A=1.2m
Generally, the equation for the speed is mathematically given as
V=d/t
V=75/30
V=2.0m/s
Period time to complete one oscillation or length.
T=d/v
T=15/2
T=7.5sec
Frequency
f=1/T
f=0.13Hz
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A ball is dropped and falls
Answer:
yeth
Explanation:
When you drop the ball, gravity pulls it down and it picks up speed. It hits the ground and squashes at the moment of impact. As the squashed ball springs back to its original shape, it pushes on the floor and the floor pushes back. The force of the floor pushing against the ball throws the ball back up into the air.
A 6m crowbar is used to lift 500 N load up to 4 m height hanging at one end of it by pressing
the bar with 400 N effort up to the depth of 6 m at the other end, then calculate
(1) Input work.
(ii) Output work, and
(ii) Efficiency of the machine
Answer:
Work = force • distance
so (input) 400 • 6 = 2400 joules.
and (output) 500 • 4 = 2000 joules
and efficiency = output energy ÷ input energy
so 2000 ÷ 2400 = 83%
input energy = 2400 joules
output energy = 2000 joules
efficiency = 83%
Kinetic energy is the energy that an object possesses due to its ____ and potential energy is the energy that an object possesses due to its ____.
Answer: Kinetic energy is the energy that an object possesses due to its motion and potential energy is the energy that an object possesses due to its position
Explanation:
Kinetic energy is the energy that a body or item has as a result of its motion.
Example: A ball that starts rolling down a hill has kinetic energy because of its motion.
Potential energy is known as the energy that an object has as a result of its position.
Example: A drawn bow can store energy because of its position.
write down the freezing and boiling point of alcohol
Why does it takes a long time to heat a room with a high ceiling?
Answer:
High ceilings make a room feel large and open, but they can be difficult to cool and heat. Because hot air rises, the challenge becomes trying to keep the hot air where you want it and preventing if from being wasted where you don't.
Explanation:
:)
Answer:High ceilings make a room feel large and open, but they can be difficult to cool and heat. Because hot air rises, the challenge becomes trying to keep the hot air where you want it and preventing if from being wasted where you don't
Explanation:
Hello people ~
Resolving power of telescope can be increased by increasing
(a) the wavelength
(b) the diameter of objective
(c) the diameter of eyepiece
(d) the focal length of eyepiece
Answer:
The diameter of the objective
Explanation:
Let's see how?
Resolving power be RDiameter be dWavelength be lambda[tex]\\ \rm\rightarrowtail R=\dfrac{d}{1.22\lambda}[/tex]
Hence
[tex]\\ \rm\rightarrowtail R\propto d[/tex]
So if d is more R is moreAn Indy car racer traveling at 15.0 meters per second slows as he makes a pit stop. If he decelerates at 2.5 meters per second squared, he was
away from the pit when he started braking.
meters
Answer:
x = 45 [m]
Explanation:
To solve this problem we must use the following kinematics equation:
[tex]v_{f}^{2} = v_{i}^{2}-(2*a*x)[/tex]
where:
Vf = final velocity = 0
Vi = initial velocity = 15 [m/s]
a = desacceleration = 2.5 [m/s^2]
x = distance [m]
Note: the negative sign in the equation above, is because the car slows down.
0^2 = 15^2 - (2*2.5*x)
2*2.5*x = 15^2
x = 45 [m]