Answer:
the average speed is ... 280 m / 8.00 s = 35 m/s
the initial speed is zero (rest), so the final speed (take off) is
... ave = (init + fin) / 2 ... 35 = (0 + f) / 2 ... f = 70 m/s
Explanation:
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!
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%
The first periodic table was organized by
atomic number
atomic mass
chemical name
chemical symbol
A device has a resistance of 11 Ω and a current of 12 A. What is it power and potential difference?
Answer:
The potential difference is 132 volt
And the Power is 1584 watt
Explanation:
Given :
Reresistance = 11 Ω
current = 12 A
The Potential difference = IR
V= IR
=> V = 11×12
=> V = 132v
Now ,
Power = VI
=> P = 132×12
=> P = 1584 w
Question :-
A Device has a Resistance of 11 Ohm and a Current of 12 Ampere . What is it Power and Potential Difference .Answer :-
Power of the Device is 1584 Watt .Potential Difference is 132 Volt .Explanation :-
As per the provided information in the given question, we have been given that the Resistance of the Device is 11 Ohm . Current is given as 12 Ampere . And, we have been asked to calculate the Power and Potential Difference .
➻ Now here, First we will find the Potential Difference of the Device :-
V = I RWhere ,
V denotes to the P.DI denotes to the CurrentR denotes to the ResistanceTherefore, by Substituting the given values in the above Formula :-
⇒ P.D = Current × Resistance
⇒ P.D = 11 × 12
⇒ P.D = 132 Volt
Hence ,
Potential Difference is 132 Volt .[tex] \: \: \: \: \: \: \: \rule{150pt} {0.5pt} [/tex]
➻ Now here, we will find the Power :-
P = V IWhere ,
P denotes to the PowerV denotes to the P.DI denotes to the CurrentTherefore, by Substituting the given values in the above Formula :-
⇒ Power = P.D × Current
⇒ Power = 132 × 12
⇒ Power = 1584 Watt
Hence ,
Power of the Device is 1584 Watt .[tex] \underline {\rule{90pt} {4pt}} \: \underline {\rule{90pt} {4pt}} [/tex]
Note :-
In the above Answer , kindly refer that P.D denotes to the Potential Difference .Two boxes of textbooks, of masses 10 kg and 15 kg, are connected by a lightweight string, and then pulled across a horizontal table by a horizontal applied force, as shown in the diagram above (attached to question).
The applied force has a magnitude of 50 N, and there is no friction between the boxes and table. What is the acceleration of the 10 kg 10 kg box?
A.) 3.3 m/s^2
B.) 2.0 m/s^2
C.) 5.0 m/s^2
D.) The box will not accelerate because the tension force acting on it to the left must also be 50 N 50 N.
Answer:
The correct option is;
B.) 2.0 m/s²
Explanation:
The given information are;
The masses of the boxes are; m₁ = 15 kg and m₂ = 10 kg
The force applied, F = 50 N
The friction force between the blocks and the table = N/A
The equation for the applied force, F = Mass, m × Acceleration, a
Therefore;
a = F/m
Given that the two boxes are attached to each other and to the force by a spring, they will experience the same motion, and therefore, the same acceleration
The total mass (the two blocks) pulled by the applied, 50 N force, [tex]m_T[/tex] = m₁ + m₂ = 10 kg + 15 kg = 25 kg
The acceleration given the blocks by the applied force, a = F/[tex]m_T[/tex] = 50 N/(25 kg) = 50 kg·m/s²/(25 kg) = 2 m/s²
The acceleration experienced by the 10 kg box = The acceleration experienced by the system of the two boxes = 2 m/s².
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]
Help in this and thx for answering it or if it is helpful
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
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.
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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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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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.
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
Question 1
Sue traveled 2.3 km on her bike and it took her 5.78 minutes go bike that distance.
What was her velocity in units of km/min ?
Heat is distributed through the atmosphere by winds
True
False
Answer:
True!
Explanation:
Hope this helps!
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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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
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:
In a summer storm, the wind is blowing at a velocity of 8 m/s north. Suddenly in 3 seconds, the winds velocity is 23 m/s north. What is the winds acceleration?
Answer:a=v-u/t
=23-8/3
=5m/s hope you got your answer
Explanation:
An 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]
A person on a tricycle travels a distance of 45km in 6.1 hrs, what was the speed of the person on the tricycle?
Answer:
7.37 km per hour
Explanation:
Divide km buy hours
Answer: 7.377 Km/h
Explanation:
What you want to do is 45 divided by 6.1. And you will get your answer.
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.
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:
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".
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.
The focal length of a converging lens is the distance.
The distance from the lens to the focal point is called the focal length.
What is a converging lens?Converging lenses, commonly referred to as convex lenses, have thicker centers and narrower upper and lower margins. The edges are outwardly curled. This lens has the ability to concentrate a beam of parallel light rays coming from the outside onto a spot on the opposite side of the lens. Convex lenses come in three different varieties, each with a unique structure.Convex mirrors are used in a car's side wing mirrors and rearview mirrors. This is so that the driver can see a wider area than the average person because of the distorted image that is created. aids the driver in keeping a closer eye on the road and vehicles in the back.Due to the greater field of view, it provides than usual, it is also utilized in driving mirrors and store security mirrors. Using blind corner mirrors to see around blind corners on the road is advantageous. By being able to see the traffic around tight turns, it improves road safety.To learn more about converging lens, refer to
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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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Is the answer I provided correct
Answer:
yea, force is mass x acceleration
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.