Sliding friction is the resistance that any two items produce as they slide against one another. Kinetic friction is another name for this friction.
What forces are at work on the moving object?The external force is the frictional motion. When the external factor is larger than the pressure of kinetic friction, acceleration happens. When the amount of kinetic friction exceeds the force of the external force, slowing (or stopping) takes place.
What kind of sliding friction is that?When an object slides across a surface, sliding friction is regarded as a resistance to that object's motion. Think of a box that is on the ground. This surface is in close proximity to the floor's surface.
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When electrons are moving it is called
A field
B electricity
C friction
D attraction
Sometimes hikers carry radio beacons so that search and rescue teams can find them in case of emergency. Some of these beacons transmit radio waves with a frequency of 300,000 Hz. (300kHz) What is the wavelength of these waves?
Answer:
1000 m
Explanation:
Given that,
The frequency of radio waves f = 300,000 Hz
We need to find the wavelength of these waves.
The formula to find wavelength is as follows :
[tex]c=f\lambda\\\\\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{300000}\\\\\lambda=1000\ m[/tex]
So, the wavelength of these waves is 1000 m.
PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST The actual subject is Science but they dont have that as a option in pick a subject
Answer:
The average speed for the runner B for the first 25 seconds was;
30/25 = 1.2 m/s
Explanation:
The average speed of an object is given by the following formula
[tex]Average \ speed = \dfrac{Total \ distance \ covered}{Total \ time \ taken \ to \ cover \ the \ distance}[/tex]
From the graph, we have;
The coordinates of the runner B at the start = (0, 0)
The coordinates of the runner B after 25 seconds = (25, 30)
The total distance covered by the runner B after 25 seconds = The difference between the position at 25 seconds and the origin which is 30 meters
∴ The total distance covered by the runner B after 25 seconds = 30 meters
The time it takes the runner B to cover the distance = The 25 seconds
[tex]\therefore \ For \ the \ runner \ B, the \ average \ speed = \dfrac{30 \ meters}{25 \ seconds} = 1.2 \ m/s[/tex]
The average speed for the runner B for the first 25 seconds = 30 m/(25 s) = 1.2 m/s.
Help
A. 12,240
B. 6,120
Answer:
A. 12,240.
Explanation:
1,530 times 8.0 = 12,240.
hope this helped :)
will give brainlist.
Answer:
Displacement (km)
Explanation:
The y axis is the vertical axis pointing up and down. This is labeled as the the displacement (km) in the graph.
Why must the Moon travel more than a full orbit around the Earth for the full moon to be complete?
Answer:
The difference between the sidereal and synodic months occurs becuase as our moon moves around the earth, the earth also moves around our sun. Our moon must travel a little farther in its path to make up for the added distance and complete the phase cycle.
Explanation:
Hope this helps.
Which nucleus completes the following equation?
Answer:
B. [tex]\frac{218}{85} At[/tex]
Explanation:
A P E X
The nucleus that completes the following equation is ²²⁶Ac₈₉
²²²Fr₈₇ →⁴He₂ + ²²⁶Ac₈₉
Therefore the correct answer is option C.
What is radioactive decay?The phenomenon of Radioactive decay is a type of nuclear reaction in which the unstable nucleus of a radioactive element lose energy in the form of nuclear radiation, some examples of radioactive decay are alpha decay, decay, and beta decay.
The complete equation for the nuclear reaction is
²²²Fr₈₇ →⁴He₂ + ²²⁶Ac₈₉
For the given problem the nucleus completes the given equation is ²²⁶Ac₈₉. The correct answer is option C.
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A meter is larger than a
A.
hectometer
B.
kilometer
C.
decimeter
D.
dekameter
Explain a situation where chemical energy is transformed into light and heat energy.
Answer:
fire
Explanation:
burning the the oil
Hurricanes along the Gulf Coastal areas of Texas increase the rate of coastal erosion.
Over time, this erosion can greatly affect the coastal environment.
Which of the following is a result of erosion on coastal environments?
Answer:
its the last question
Explanation:
Thats because erosion takes away stuff
If all the forces acting on an object are balanced then the net force acting on it is zero. True or, false?
Answer:
true
Explanation:
if all forces are equal then there would be no stronger force to give any net force so it would be zero
A flute plays a note with a frequency of 266Hz. What is the speed of sound if the wavelength is 1.3m?
Explanation:
Wave speed = (frequency) x (wavelength)
= (266 /sec) x (1.3 meters)
Please help the best answer get brainlist pretty easy questions
1 - List the type of fossil fuels we use in our daily lives.
2 - List the disadvantages of using fossil fuels
Answer:
1, Coal,oil,natural gas,petroleum ...etc
2, -they pollute the environment
-In case of irresponsible use ,they can be
dangerous
-it is more reliable an renewable
What is the source of heat for convection currents in the mantle layer of earth
Answer:
Magma from the core
Explanation:
...?
the ratio between the force of sliding friction and the normal force of an object is called?
A. The rolling friction
B. The drag
C. The coefficient of friction
D. The starting friction
Answer:
the coefficient of friction
what causes wind to flow ?
Answer:
hi
Explanation:
as a result of the collision of hot and cold air
hope it helps
have a nice day
Answer:
Hey mate.....
Explanation:
This is ur answer.....
Wind is the movement of air caused by the uneven heating of the Earth by the sun. ... Warm equatorial air rises higher into the atmosphere and migrates toward the poles. This is a low-pressure system. At the same time, cooler, denser air moves over Earth's surface toward the Equator to replace the heated air.
Hope it helps!
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If two micro coulomb of charge is flowing in a circuit for 5 minutes. What is the amount of current in the circuit?
Answer:
6.67×10¯⁹ A
Explanation:
From the question given above, the following data were obtained:
Quantity of electricity (Q) = 2 μC
Time (t) = 5 mins
Current (I) =?
Next, we shall convert 2 μC to C. This can be obtained as follow:
1 μC = 1×10¯⁶ C
Therefore,
2 μC = 2 μC × 1×10¯⁶ C / 1 μC
2 μC = 2×10¯⁶ C
Next, we shall convert 5 mins to seconds. This can be obtained as follow:
1 min = 60 secs
Therefore,
5 min = 5 min × 60 sec / 1 min
5 mins = 300 s
Finally, we shall determine the current in the circuit. This can be obtained as follow:
Quantity of electricity (Q) = 2×10¯⁶ C
Time (t) = 300 s
Current (I) =?
Q = It
2×10¯⁶ = I × 300
Divide both side by 300
I = 2×10¯⁶ / 300
I = 6.67×10¯⁹ A
Thus, the current in the circuit is 6.67×10¯⁹ A
If force 1 has a magnitude of 5 N (forward) and force 2 has a magnitude of 30 N (forward), what is the net force acting on the object?
A.) 25 N forward
B.) 35 N forward
C.) 25 N backwards
D.) 35 N backwards
Each of these flasks contains the same number of gas molecules. In
which container is the pressure highest?
Flask 1
Flask 2
Flask 3
Flask 4
Flask 3
Flask 4
Flask 2
Flask 1
Page
Answer:
Flask 1
Explanation:
when volume goes down pressure goes up, and the first flask has the smallest volume therefore the greatest pressure
We have that from the ideal gas equation that the flask with the lowest volume will have the highest pressure therefore
Flask one has the lowest Pressure
Option D
From the question we are told
Each of these flasks contains the same number of gas molecules. In
which container is the pressure highest
Generally the equation for an Ideal gas given as is mathematically given as
The ideal gass equation
[tex]PV=nRT[/tex]
Where
P=pressure
V=Volume
n=No of mole
R=Gas Constant
T=temperature
Therefore We have that from the ideal gas equation that the flask with the lowest volume will have the highest pressure therefore
Flask one has the lowest Pressure
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Why are some forces considered to be noncontact forces? A. Objects must be far apart in order to exert a force. B. Objects do not have to touch each other to experience a force. C. Objects push each other apart to increase the distance between them. D. Objects must be large in size in order to exert a force that is strong enough to notice. is it a,b,c or d?
Answer:
B. Objects do not have to touch each other to experience a force.
Explanation:
For example ..One of the noncontact forces is magnetic force whereby a magnetic object will be attracted to another magnetic object of oppsite charged particles, through waves called electromagnetic waves. On the other hand, the two magnetic objects of similar charged particles can repel through electromagnetic waves..
4. Earth and Venus are almost identical in size and smaller than the Sun), but Venus is located closer to the Sun. Which of the following statements must be true?
O A Earth will have a wider penumbra than Venus
O B. Earth will have a shorter umbra than Venus
O C. Earth will have a longer umbra than Venus.
OD. The umbra and penumbra of Venus and Earth will have nearly the same length and shape.
What moon phase would be at positions 1 and 5?
A. 1 full moon and 5 is new moon.
B. 1 is a lunar eclipse and 5 is a solar eclipse.
C.1 is a waxing gibbous and 5 is a waning crescent.
D.5 is a full moon and 1 is new moon.
Please help, This will affect my grade!
Answer:
C.1 is a waxing gibbous and 5 is a waning crescent.
Which type of map best shows the three dimensions of Earth’s surface?
Answer:
please give me brainlist and follow
Explanation:
topographic map
A topographic map shows a three-dimensional representation of a flat surface. It has contour lines joining points of equal elevation; the closer the lines are the steeper the elevation is.
A spring of force constant 1500 Nm-l is acted
upon by a constant force of 75 N. Calculate
the potential energy stored in the spring.
Answer:
1.876 J
Explanation:
First, let’s calculate the compression of the spring from the Hooke’s law:
F=kx,
here, F=75 N is the force acted on the spring, k=1500 N⁄m is the force constant of the spring, x is the compression of the spring.
Then, we get:
x=F/k=(75 N)/(1500 N/m)=0.05 m.
Finally, we can find the potential energy stored in the spring:
PE=1/2 kx^2=1/2∙1500 N/m∙(0.05 m)^2=1.875 J.
correct my answer if it's wrong ^^
A 3.9 kg object is on top of a shelf that is 1.5 meters high. The object falls at a velocity of 9.2 m/s. Calculate the kinetic energy of the falling object
the answer is 165J
1/2×3.9×(9.2)^2 = 165J
Many people who have contracted a disease called chicken pox were told by their doctors that they would never have this
disease again. Why?
Answer:
Once you've had chickenpox you can't again.
Explanation: the virus remains inactive in your nerve tissue. Although it's unlikely you will get chickenpox again, the virus may reactivate later in life and cause a related condition called shingles.
6. Sandy adds 3 sugar packets to her tea in order to make it sweeter. She stirs in the sugar and then takes a sip. She notices that not all the sugar was dissolved. What type of solution did she make?
A. Saturated B.Unsaturated C.Supersaturated D.Mildly saturated
Answer:
C.Supersaturated
Explanation:
There are three types of solution:
SATURATED SOLUTION:
It is the solution that contains maximum amount of solute dissolved in a solution in normal conditions.
UNSATURATED SOLUTION:
It is the solution that contains less than the maximum amount of solute dissolved in a solution in normal conditions. It has space for more solute to be dissolved in it.
SUPERSATURATED SOLUTION:
It contains more than the maximum amount of solute dissolved in it. Such a solution has no capacity to dissolve any more solute under any conditions.
Since the sugar is no more dissolving in the tea and has settled down. Therefore, the solution is:
C.Supersaturated
Define the types of friction and give FOUR examples of each
Static Friction
Rolling Friction
Sliding Friction
Fluid Friction
What are the purposes of these items aboard the Voyager probes? • Low-energy particle detector: • Magnetometer boom: • High-gain antenna: • Photopolarimeter: • Cosmic ray:
Explanation:
1. Low-energy particle detector: This particle detector measures the charged particles of the solar winds.
2. Magnetometer boom: This device measures magnetic fields produced by astronomical bodies.
3. High-gain antenna: A HGA has a narrow radio beam that is used to enhance the strength of signal. They simply amplify the weak signals.
4. Photopolarimeter: This is an instrument that is used to measure the strength and intensity and polarization of reflected light.
Answer:
what they said
Explanation:
Magnetic objects will attract to a magnet even if they are far from it.
Yes or No
Answer:
Yes
Explanation:
tamad ako magexplain
Answer:
Yes
Explanation:
The force exerted by a magnet is called
The push or pull of magnetism
can act at a distance, which means that the
magnet does not have to touch an object
to exert a force on it. When you close the
refrigerator, you feel the pull before the
magnet actually touches the metal frame.
There are other forces that act at a distance,
including gravity and static electricity. Later
you will read how the force of magnetism is
related to electricity. In fact, magnetism is
the result of a moving electric charge.