Answer:
Explanation:
Minimum force needed to set the flower in motion = maximum frictional force
possible on the flower by the floor .
= μ x mg
where μ is coefficient of friction of the floor and mg is weight of the flower
= .76 x 11 x 9.8
= 81.9 N
When the flower is in motion , kinetic friction is applied on it
Force of kinetic friction applied on it
= μk x mg where μk is coefficient of kinetic friction of the floor
= .44 x 11 x 9.8
= 47.43 N
Pushing force is 81.9 N , so net force on flower when it is in motion
= 81.9 - 47.43 N
= 34.47 N
Acceleration = net force / mass
= 34.47 / 11
= 3.133 m /s
distance moved by flower in 3.75 s
s = ut + 1/2 a t²
= 0 + .5 x 3.133 x 3.75²
= 22 m
You swing a 2 kg ball around on a string. The radius of the circle the ball travels around is 2 m, and you give the ball a velocity of m/s. What is the centripetal force on the ball?
Answer:
F = 9 N
Explanation:
We have,
Mass of a ball is 2 kg
The radius of the circle the ball travels around is 2 m
Let the velocity of the ball is 3 m/s
It is required to find the centripetal force on the ball. The force that is required to move an object in circular path is called centripetal force.
[tex]F=\dfrac{mv^2}{r}\\\\F=\dfrac{2\times (3)^2}{2}\\\\F=9\ N[/tex]
So, the centripetal force on the ball is 9 N.
A wind blows at 100 km / h from the east. An aircraft points due north and sets off. In still air its speed is 150 km / h. What will the aircraft's actual velocity be?
Answer:
180.28 km/h
Explanation:
Let north and south represent the positive and negative y axis and east and west represent the positive and negative x axis.
Given;
Velocity of wind vx= 100 km/s
Velocity of aircraft in still air vy = 150 km/s
The resultant velocity Vr is;
Vr = √(vx^2 + vy^2)
Vr = √(100^2 + 150^2)
Vr = 180.2775637731 km/h
Vr = 180.28 km/h
The springs in a car’s suspension have a spring constant of 50 000 N/m. The elastic potential energy store is 0.025 J. Calculate the extension of the springs.
Answer:
1 mm
Explanation:
E = ½ kx²
0.025 J = ½ (50,000 N/m) x²
x = 0.001 m
x = 1 mm
Will mark brainliest for the first person who answered correctly Which of the following is an example of non-renewable energy? Hydroelectric Gas Solar Wind
Answer:
gas is non-renewable resource
Explanation:
Answer:
Gas
Explanation:
There are two types of energy sources, renewable and non-renewable.
Solar energy, wind energy, and hydroelectric are an example of renewable energy.
Fossil fuels like gas, coal, and petroleum are an example of non-renewable energy.
The earth attracts an apple with a force of 15 Newton. taking this as an action force, how much is reaction force? who accepts the reaction force? on which body does a reaction force act?
Answer:
action = reaction
land accepts
reaction force acts on the apple
Answer:
15 Newton
Explanation:
According to Newton's third law of motion, "Every action has a reaction which is equal in magnitude but opposite in direction" (Right now, we're not talking about direction, so we'll ignore it)
So,
Action Force = Reaction Force
Reaction Force = 15 N
The action force is by the Earth on the Apple, So the reaction force will be by the Apple on the Earth.
How do you calculate the speed of a 3.1eV photon and a 3.1eV electron?
Explanation:
We need to find the speed of a 3.1eV proton and a 3.1eV electron.
For proton, using conservation of energy such that,
[tex]\dfrac{1}{2}m_pv_p^2=eV\\\\v_p^2=\dfrac{2eV}{m_p}\\\\v_p=\sqrt{\dfrac{2eV}{m_p}}[/tex]
[tex]m_p[/tex] is mass of proton
[tex]v_p=\sqrt{\dfrac{2\times 3.1\times 1.6\times 10^{-19}\ J}{1.67\times 10^{-27}\ kg}}\\\\v_p=2.43\times 10^5\ m/s[/tex]
For electron,
[tex]\dfrac{1}{2}m_ev_e^2=eV\\\\v_e^2=\dfrac{2eV}{m_e}\\\\v_e=\sqrt{\dfrac{2eV}{m_e}}[/tex]
[tex]m_e[/tex] is mass of proton
[tex]v_e=\sqrt{\dfrac{2\times 3.1\times 1.6\times 10^{-19}\ J}{9.1\times 10^{-31}\ kg}}\\\\v_e=1.44\times 10^6\ m/s[/tex]
Hence, this is the required solution.
The student concluded that the current in the LDR is inversely proportional to the potential difference across the LDR. Explain why the student's conclusion is incorrect.
The given question is incomplete as the essential graphical result is missing, however the correct graph is attached with the answer :
Answer:
The correct answer is - According to the graph, the current in the LDR is directly proportional to the potential difference across the LDR.
Explanation:
Two variables that are in directly proportion will consistently deliver a straight-line graph that goes through the beginning. On the off chance that the steady of proportionality is sure, the chart will have a positive slope. On the off chance that the steady is negative, the graph will have a negative angle.
In the given data and graph of the result collected by the student shows a straight line in between the current in the LDR and the potential difference across the LDR. It means they are in relation of directly proportional.
Thus, the correct answer is - According to the graph, the current in the LDR is directly proportional to the potential difference across the LDR.
Planets revolve around the sun why
A lever and fulcrum are used to lift a fallen tree, which has a weight of 480N. if the lever has a mechanical advantage of 5.5, what is the input force that will begin lifting the tree of the ground
Answer:
The input force is 87.27NExplanation:
Mechanical advantage (M.A)of a machine is the ratio of load to effort
GivenM.A= 5.5
load= 480N
effort= ?
Applying the formula and substituting to find the effort we have
[tex]M.A= \frac{load}{effort}[/tex]
[tex]5.5= \frac{480}{effort}\\\effort= \frac{480}{5.5} \\\effort= 87.27N[/tex]
What is mean by physical quantity?
Answer:
Anything that can be measured is called a physical quantity. It is described with the help of magnitude and the unit. There are two types
1) Base quantity
2) Derived Quantity
Answer:
A physical quantity is the quantity that can be measured directly or indirectly and consists of a magnitude and a unit. Mass, length, time, density, temperature etc are some examples of physical quantities. Happiness, sadness etc cannot be measured. So, they are not physical quantities. We cannot find the exact value of any physical quantity without measurement.
There are two types of physical quantity. They are:
Fundamental quantityDerived QuantityHope this helps...
Good luck on your assignment...
A cyclist is riding his bike up a mountain trail. When he starts up the trail, he is going 8 m/s. As the trail gets steeper, he slows to 3 m/s in 1 minute. What is the cyclist’s acceleration? –0.08 m/s2 0.08 m/s2 –12 m/s2 12 m/s2
Answer:
-0.08m/s²
Explanation:
A motor has an input power of 120 W and is 40 % efficient. Calculate the power wasted by the motor.
Answer:
72 W
Explanation:
60% is wasted, or:
0.60 (120 W) = 72 W
if the relative density of a liquid is 0.34 what is the density of the liquid
Answer:
340 kg/m³
Explanation:
[tex]Relative density \: = \frac{density \: ofsubstance}{density \: of \: equal \: volume \: ofwater} [/tex]
density of water = 1000 kg/m³
density of the liquid = 0.34 × 1000
= 340 kg/m³
The density of air is 1.3 kg/m^3. What mass of air is contained in a room measuring 2.5m x 4m x 10m? Give your answer in kg. Brainliest will be given!! (Formula for density is P= M/V)
What method of charge transfer is shown in the above diagram? A. friction B. induction C. radiation D. conduction
Explanation:
Since how I can't see the graph I'll explain as best as I can.
Friction is the process of two things rubbing against each other causing heat, and pressure. A example would be rubbing a stick into a log to start a fire.
Conduction is heat transfer that usually involves heat flowing from a hot object to a cold object increasing the cold objects temperature. A example would be putting a spoon in a pot of hot water and in result the spoon will also get hot.
Radiation is a type of transfer that involved the sun shining it's energy transforming it's light energy into electrical energy. Or increasing somethings temperature by using light.
Induction is the process of using a conductor to change the magnetic field of a magnet in order to do this you need a electrical conductor and a magnet you put the magnet in the conductor and the heat causes the magnetic field to change.
Hope this helps.
I believe it's B, induction.
a skier traveling 11m/s goes up a 19 degree inclined plane, and glides up 15m before coming to rest. what is the average coefficient of friction?
Answer:
do you mind telling me what is it your asking so i can help ?
Explanation:
A14 is running toward the goal. her teammate, a12, kicks the ball toward a14. a14 did not see the ball coming and the ball strikes her in the back of the hand as her hand is at her side. the proper call would be to:
The Available options are:
A. Award an indirect free kick to Team B for incidental contact.
B. Award a direct free kick to Team B.
C. Allow play to continue as the handling was incidental but issue a caution to the player at the next stoppage of play.
D. Allow play to continue.
Answer:
Allow play to continue.
Explanation:
IFAB (International Football Association Board) has approved various means to clarify the issue of handball in foodtball.
Hence, some of the cases include:
1. Should the the ball touches a player's hand/arm immediately from their own head/body/foot or the head/body/foot of another player.
2. the ball touches a player's hand/arm close to their body and has not made their silhouette unnaturally bigger.
3. a player is falling and the ball touches their hand/arm when it is between their body and the ground (but not extended to make the body bigger).
4. Additionally, should the goalkeeper attempt to clear a ball from a teammate but fails, the goalkeeper is allowed to handle the ball.
Hemce, Since a14 who did not see the ball coming and the ball strikes her in the back of the hand as her hand is at her side. the proper call would be to: ALLOW PLAY CONTINUE
8. what force will exert apressure of
50000 PA
0.5 meter
Square ?
Answer:
25000 N
Explanation:
[tex]force \: = pressure \times area \\ = 50000 \times 0.5 \\ = 5000 \times 5 \\ = 25000 \: N[/tex]
which glass is used in astrology?
Answer:
The answer is either looking glass or stained glass.
Explanation:
The popular glass used in astrology is stained glass which is popular in symbolization of huge astrology figures. As for looking glass, it's more popular in astrological souvenirs or objects.
Answer:
i think answer is pisces horoscope
With all his gear, Neil Armstrong weighed 360 pounds on Earth. When he landed on the Moon, he weighed 60 pounds. Why? A. His mass changed while traveling to the Moon. B. The gravity on the Moon is six times the gravity on Earth. C. The gravity on the Moon is less than the gravity on Earth. D. He experienced the effects of a gravity slingshot.
Answer:
C
Explanation:
Answer:
C) The gravity on the Moon is less than the gravity on Earth.
Explanation:
Since Moon is smaller than Earth, any mass on Moon will experience less gravitational force and so that mass will weigh less on Moon.
What are some of the major differences between the ancient Olympics and modern-day Olympics? List and describe at least two differences.
Answer:
Women are now allowed to participate in the Olympics. The original Olympic Games were open only to men.
Modern Olympic Games include many more events. The first Olympics included only a running event. Today, there are more than 20 different sports and almost 300 events.
The Olympics are held every two years, alternating between summer and winter. The ancient Olympics were originally held every four years in Olympia.
Athletes from countries around the world participate in the modern Olympics. The ancient Olympics consisted of athletes only from ancient Greece.
Explanation:
plato
why why scientists uses atomic watches?
Answer:
Atomic clocks are the most accurate time and frequency standards known, and are used as primary standards for international time distribution services, to control the wave frequency of television broadcasts, and in global navigation satellite systems such as GPS.
Select the arrangement of electromagnetic radiation which starts with the lowest wavelength and increases greatest wavelength. Multiple Choice radio, ultraviolet, infrared, gamma rays gamma rays, ultraviolet, infrared, radio radio, infrared, ultraviolet, gamma rays gamma rays, infrared, radio, ultraviolet gamma rays, radio, ultraviolet, infrared
Answer:
gamma rays, ultraviolet, infrared, radio
Explanation:
Because on the Electromagnetic spectrum wavelength increases from the gamma end to radio end and frequency decrease in that order
Answer:
radio → infrared → ultraviolet → gamma
Explanation: yeaaahhh its c
Arace car starts from rest and accelerates uniformly to a speed of 40 m/s in 8.
seconds. How far will the car travel during the 8 seconds?
meters
Type the correct answer, then press Enter.
Answer:
160 m
Explanation:
For computing the distance first we have to determine the acceleration which is shown below:
v = u + at
where,
v = 0 = initial velocity
u = 40 = uniformly to a speed
t = 8 = time
So, the a is
= 40 ÷ 8
= 5 m/s
Now we have to use the distance formula i.e
d = ut + 1 ÷ 2 at^2
= 1 ÷2 × 5 × 8^2
= 160 m
Basically we have to applied the above formulas so that the distance could come
PLEASE HELP WILL GIVE BRANLIEST IF CORRECT
Which labels best complete the diagram?
1) X: Brush Y: Armature Z: Commutator
2) X: Commutator Y: Brush Z: Armature
3) X: Armature Y: Commutator Z: Brush
4) X: Armature Y: Brush Z: Commutator
Answer:
Explanation:
z: commutatory: brush x: armatureAnswer:
4
Explanation:
X would be armature.
Y is the brush because when z moves the circuits, the brush moves with it
the commutator helps turn the circuits, so that would be z.
output work is always less than input work,why
Answer:
Output work is always less than input work due to effect of friction. Machines are frictionless in practice, the efficiency of a machine can never be 100%.
Hope this helps..
Good luck on your assignment..
Answer:
Friction
Explanation:
the handles of tin-snips (metal cutter) are made long ,why
Answer:
because lwhen they are made longer than the turning effect of force is more and its easy to work it out.
An electron is in motion at 4.0 × 106 m/s horizontally when it enters a region of space between two parallel plates, as shown, starting at the negative plate. The electron deflects downwards and strikes the bottom plate. The magnitude of the electric field between the plates is 4.0 x 102 N/C and separation between the charged plates is 2.0 cm. Determine the horizontal distance travelled by the electron when it hits the plate.
Answer:
xmax = 9.5cm
Explanation:
In this case, the trajectory described by the electron, when it enters in the region between the parallel plates, is a semi parabolic trajectory.
In order to find the horizontal distance traveled by the electron you first calculate the vertical acceleration of the electron.
You use the Newton second law and the electric force on the electron:
[tex]F_e=qE=ma[/tex] (1)
q: charge of the electron = 1.6*10^-19 C
m: mass of the electron = 9.1*10-31 kg
E: magnitude of the electric field = 4.0*10^2N/C
You solve the equation (1) for a:
[tex]a=\frac{qE}{m}=\frac{(1.6*10^{-19}C)(4.0*10^2N/C)}{9.1*10^{-31}kg}=7.03*10^{13}\frac{m}{s^2}[/tex]
Next, you use the following formula for the maximum horizontal distance reached by an object, with semi parabolic motion at a height of d:
[tex]x_{max}=v_o\sqrt{\frac{2d}{a}}[/tex] (2)
Here, the height d is the distance between the plates d = 2.0cm = 0.02m
vo: initial velocity of the electron = 4.0*10^6m/s
You replace the values of the parameters in the equation (2):
[tex]x_{max}=(4.0*10^6m/s)\sqrt{\frac{2(0.02m)}{7.03*10^{13}m/s^2}}\\\\x_{max}=0.095m=9.5cm[/tex]
The horizontal distance traveled by the electron is 9.5cm
As the distance between a satellite in a circular orbit and the central object increases, the period of the satellite .
Answer:
As the distance between a satellite in a circular orbit and the central object increases, the period of the satellite increases .
Explanation:
Answer:
Increases
Explanation:
A lizard leaps 2.1\,\text m2.1m2, point, 1, start text, m, end text to the left in 0.52\,\text s0.52s0, point, 52, start text, s, end text. What was its average speed in \dfrac{\text m}{\text s} s m start fraction, start text, m, end text, divided by, start text, s, end text, end fraction
Answer:
v = 4.03 m/s
Explanation:
It is given that,
Distance covered by a lizard, d = 2.1 m
Time taken by lizard, t = 0.52 s
We need to find the average speed of the lizard. The distance covered divided by time taken is called the average speed of lizard. So,
[tex]v=\dfrac{d}{t}\\\\v=\dfrac{2.1\ m}{0.52\ s}\\\\v=4.03\ m/s[/tex]
So, the average speed of the lizard is 4.03 m/s.
Answer: 4.02 not 4.03
Explanation: I did on khan academy