Answer:
Is to add all forces, for example either the gf = gravitational force
Ff= force fiction
Fn= normal force
Thus, fg + ff + fn = y will give you results
Well then the forces you use in your exercises or questions.
The equation for net force is: ΣF = ma
or, ΣF = Δp/Δt.
What is force?The definition of force in physics is: The push or pull on a massed object changes its velocity.
An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude. The application of force is the location at which force is applied, and the direction in which the force is applied is known as the direction of the force.
A spring balance can be used to calculate the Force. Newton is the SI unit of force.
Hence, net force applied on the object = mass × acceleration
ΣF = ma
It can be written in another from as:
net force applied on the object = change in momentum ÷ time interval
ΣF = Δp/Δt
So, the equation for net force is: ΣF = ma
or, ΣF = Δp/Δt.
Learn more about force here:
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Homework B5
Grade 9
March 2021
Name: ......M
Saya....... Nambert......
1- The density of fresh water is 1000 kg/m². The pressure gauge on the submarine in
a river was reading 100 kPa when it was at the surface. A sailor notices that the
gauge is now reading 250 kPa. How deep is he? How would this answer change if
the sailor were diving in sea water is slightly denser than fresh water? [3]
Answer:
I hope this helps a little bit.
what is the total energy a 60W incandescent light bulb in KWh will consume in 336 hours?
(60 W) x (336 hrs) = 20,160 W-hr
That's 20.16 KWh .
Which statement correctly describes the relationship between air temperature and air pressure?
-Warm air rises, creating an area of low pressure.
-Cool air sinks, creating an area of low pressure.
-Warm air sinks, creating an area of low pressure.
-Cool air rises, creating an area of low pressure.
What is the correct answer! Thank you for your help
the movement of a body between any two points in any direction is called
Answer:
I think is called Motion
but am not sure
Answer:
Maybe its displacement, I'm not sure?
Explanation:
You have two rocks made of the same material that are at the same
temperature. The first rock has three times the mass of the second rock. How
does the thermal energy of the two rocks compare?
A. The second rock has three times the thermal energy of the first rock
B. The first rick has six times the thermal energy of the second rock
C. The second rock has one-third as much thermal energy as the first rock
D. The rocks have the same amount of thermal energy
Answer:
the rocks have the same amount of thermal energy
would this be Newtons 1st, 2nd, or 3rd law
Answer:
Newton's First Law of Motion.
Explanation:
Newton's First Law of Motion states that a body continues its state of motion untill and unless an external force acts on it. Here, the truck moves forward even after the breaks are applied in order to maintain its State of motion.
A 1,500 kg car is at rest on a level track. The driver gives the engine gas and the car begins to accelerate forward. The car moves from 0 m/s to 27 m/s in 8 sec. What is the acceleration of the car?
Answer:
3.375 m/s²
Explanation:
Using equation of motion:
v = u + at
Here, v = 27m/s & u = 0m/s & t = 8 sec
Let the acceleration be a.
=> 27 = 0 + 8(a)
=> 27/8 = a
=> 3.375 m/s²
Question 3 (1 point)
✓ Saved
3
A group of physics students has been given a small stereo speaker and told to use it
for investigating sound waves. After much experimentation, the students discover
that the speaker works by quickly moving in and out. This process pushes the air
around it in little bursts that travel in the same direction as the speaker's motion.
Based on these observations, how should sound waves be categorized?
6
An electromagnetic wave that has transverse vibrations
A mechanical wave that has longitudinal vibrations
An electromagnetic wave that has longitudinal vibrations
A mechanical wave that has transverse vibrations
Activat
Answer:
Soundwave should be categorized as follows;
A mechanical wave that has longitudinal vibrations
Explanation:
Sound wave should be categorized as longitudinal waves that vibrate the particles of the medium transmitting sound energy layer by layer along a path parallel to the direction of propagation of the wave
Therefore, soundwave should be categorized as a mechanical wave because it is generated and propagated by the vibration of a source and the interaction of the source with the particles of the medium in which the source is located
soundwave is also a longitudinal wave because the direction of vibration of th particles of the medium through which the sound wave is transported is in the same direction as the wave
Therefore, sound wave should be categorized as mechanical wave that has longitudinal vibrations.
The soundwave should be categorized where the mechanical wave that has longitudinal vibrations
What is a sound wave?
It should be categorized at the time when the longitudinal waves should be vibrated the particles with respect to the medium transmitting via layer along with it the path should be parallel to the propagation direction of the wave. Also, it should be categorized as the mechanical wave since there should be the vibration of the source.
Learn more about waves here: https://brainly.com/question/1820914
Calculate the work done when lifting a sack of potatoes with a force of 100N vertically
6m.
Answer:
600J
Explanation:
W=Fd so, W=100*6=600J
the energy produced by the internal motion of atoms? electrical , thermal, chemical, nuclear
Answer:
Thermal energy, or heat, is the energy that comes from the movement of atoms and molecules in a substance. Heat increases when these particles move faster. Geothermal energy is the thermal energy in the earth. Motion energy is energy stored in the movement of objects. so the answer is thermal energy
What determines the
carrying capacity in an
ecosystem?
A. The number of different species in
the ecosystem
B. Limiting factors
C. Only biotic factors
D. Only abiotic factors
Answer:
Your answer is B. Limiting factors
Explanation:
Brainliest pleaseeee
A particle was moving in a straight line at 172.8 km/hr. If it decelerated over 120 meters to come to rest, find the time taken to cover this distance.
Answer:
v=s/t
s=vt
t=s/v
t=(120×10‐³)/172.8
(the distance meters has been changed to kilometres)
t=1/1440 hrs
Given ,
hii please help i’ll give brainliest!!
Answer:
An object in motion will remain in motion until it experiences an unbalanced force.
Explanation:
This is part of Newton's first law. An unbalanced force is there to offset the object in motion, such as a ball versus a wall. A wall will stop the ball from moving.
Compare the concepts of mass and weight. Name three differences.
Answer:
1a)Mass is the amount of matter in the body.
1b)Weight is the measure of the amount of force acting on a mass due to acceleration and gravity.
2a)Mass can never be zero
2b)Weight can be zero if no gravity acts upon an object. like in space
3a) Mass does not change according to location.
3b)Weight varies according to location.
PLS HELP! QUESTION (2/2)
Two blocks, one of mass 1.00 kg and 4.00 kg are tied together with a massless rope as in the image. This rope is strung over a massless, resistance-free pulley. The blocks are released from rest. Find the tension in the rope and the acceleration of the blocks.
Define one solar day
Answer:
the time between successive meridian transits of the sum at a particular place
Brainliest for correct answer :)
Choose The 3rd Option.
.....
A spinning wheel on a fireworks display is initially rotating in a counterclockwise direction. The wheel has an angular acceleration of -4.20 rad/s2. Because of this acceleration, the angular velocity of the wheel changes from its initial value to a final value of -26.0 rad/s. While this change occurs, the angular displacement of the wheel is zero. (Note the similarity to that of a ball being thrown vertically upward, coming to a momentary halt, and then falling downward to its initial position.) Find the time required for the change in the angular velocity to occur.
Answer:
The time it takes for the change in the angular velocity to occur is 6.5 seconds
Explanation:
From the question, we have;
The angular acceleration of the wheel, α = -4.20 rad/s²
The final angular velocity of the wheel, ω = -26.0 rad/s
From the information, we have the initial direction of rotation of the wheel = Counterclockwise
The angular displacement while the change occurs = 0 rad/s
Therefore, the initial angular velocity of the wheel, ω₀ = 0 rad/s
We have;
[tex]\alpha = \dfrac{\omega -\omega _0 }{t - t_0}[/tex]
Where;
t - t₀ = The time it takes for the change to occur
[tex]\alpha = \dfrac{\omega -0 }{t - 0}[/tex]
When t₀ = 0, we have;
t - t₀ = t
[tex]\alpha = \dfrac{\omega }{t}[/tex]
[tex]\therefore t = \dfrac{\omega}{\alpha }[/tex]
[tex]\therefore t = \dfrac{-26 \, rad/s}{-4 \, rad/s^2 } \approx 6.5 \, seconds[/tex]
The time it takes for the change in the angular velocity to occur is t - t₀ = 6.5 seconds
At which latitude would tropical rain forests be most likely?
(giving brainliest)
-10 degrees North
-30 degrees South
-60 degrees North
-90 degrees South
Which of these is an example of acceleration?
A) a bicyclist turning around a corner
B) a car traveling south with its cruise control set
C) a bus traveling north at 25m/s
D) a helicopter waiting to take off
You can download answer here
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if the temperature is constant and the pressure increases, then the volume will ____.
HELPPP 15 points
If you can hear your sibling playing music in their room when you are in your room with the door closed, this is due to sound wave ____
a. absorption
b. reflection
c. refraction
d. transmission
its not a or b I believe it's d but I'm not positive
According to evidence presented in both the text and video, which statement is the most accurate regarding the relationship between stress and the
immune system?
a.Stress activates foreign invaders that would otherwise lie dormant
b.Stress does not cause illness but restrains the immune system's ability to fight foreign invaders
c.Foreign agents invade the body and make it more susceptible to stressors
d.Stressors wear on the body, causing invading agents such as cancer to generate spontaneously
Answer:
Stress does not cause illness, but restrains the immune system's ability to fight foreign invaders
Explanation:
It's correct :)
What would be the mass of an object that has a force of 88N and an acceleration of 12 m/s2?
Answer:
7.33 kg
Explanation:
F = ma
88 N = m(12 m/s^2)
m = 7.33 kg
The speed of light in air is 3 x 108 m/s. The speed of light in ice is 2.29 x 108 m/s. What is the refractive index from air to ice?
Answer:
η = 1.31
Explanation:
The formula for the refractive index of from air to some other medium is given by the following formula:
[tex]\eta = \frac{c}{v}\\[/tex]
where,
η = refractive index = ?
c = speed of light in air = 3 x 10⁸ m/s
v = speed of light in ice = 2.29 x 10⁸ m/s
Therefore, using these values in the equation we get:
[tex]\eta = \frac{3\ x\ 10^8\ m/s}{2.29\ x\ 10^8\ m/s} \\[/tex]
η = 1.31
(b)
Describe how the horizontal forces acting on the car change during the first two seconds
of the acceleration.
Answer:
Driving force increases, friction forces increase, the driving force is bigger than friction 12.
Explanation:
What is the resistance ratio of two bulbs of 100W and 50W at 250V?
Answer:
This is an interesting and useful question.
With just a bit of algebra and a couple of equations, you can calculate the answer.
The MOST important equation is for Power, P=IV, current times voltage.
You have provided us with a value for the Power of each bulb (100W and 50W) and the voltage of 250V. These are easy numbers. Let's figure out the current through each bulb that produces each power rating.
Current through the 100W bulb = _______
Current through the 50W bulb = _______
(Do these numbers make sense? It would seem as though if the voltages are equal then more current would be needed to generate more power. Right?)
Now we have BOTH the current for each bulb AND the voltage for each bulb.
Time for another equation - the definition of resistance, R= V/I, voltage divided by current.
That should wrap things up for you.
(But, WAIT! Let’s actually MEASURE the resistance of each bulb. We’ve gotta find a resistance meter, also called an ohm-meter, to do this. Do NOT be disappointed if your measurements do not agree with your calculations. Life is WAAAAY too interesting to get hung up on details like this!)
The resistance ratio of the two bulbs is 1/2.
What is meant by electrical power ?Electrical power of a circuit is defined as the time rate of change of work done in an electrical circuit.
Here,
Power in the first bulb, P₁ = 100 W
Power in the second bulb, P₂ = 50 W
Voltage applied to the bulbs, V = 250 V
The expression for electric power in a circuit is given as,
Power, P = V²/R
where R is the resistance of the circuit.
Since, the voltage is same for both the bulbs, we can say that,
P [tex]\alpha[/tex] 1/R or R [tex]\alpha[/tex] 1/P
Therefore, the ratio of resistances of the bulbs,
R₁/R₂ = P₂/P₁
R₁/R₂ = 50/100
R₁/R₂ = 1/2
Hence,
The resistance ratio of the two bulbs is 1/2.
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Make
a claim about what might happen to a
population of rabbits in a forest if a new
predator moved to the forest. Cite evidence
to support the claim and explain your
reasoning.
Answer: The rabbits will die off and the things that rabbits eat will overpopulate.
Explanation:
6. _______________ : when a certain number of waves pass a given point for a certain number of seconds? Group of answer choices A. wavelength C. amplitude D. height B. frequency
Ill give brainly-ist.
Answer:
b
kakanandnanjsnMajdnAnnznnzkkzid
Answer:
Frequency
Explanation:
I just took that test