Answers
Answer:
FN is the forces acting on a body. When the body is at rest, the net force formula is given by, FNet = Fa + Fg.
Im in 7th and thats all I know so I hope it's enough
Related Questions
Why does your head hurt when you go deep underwater?
Answers
Answer:
The pressure under water . It presses against your head
Explanation:
Why do some clothes stick together when they come out of the dryer?
Answers
Answer:
they stick to each other due to static electricity
Explanation:
Write the importance of international bureau of weights and measurement.
Answers
Answer:
The importance of international bureau of weights and measures are;
1. to bring unification of measurement system.
2. to establish and preserve fundamental international prototypes.
3. to verify national standards, etc.
PLEASE HELP: Which of the following procedures describes how you could best test the hypothesis that a crumpled piece of paper falls faster than a piece of paper folded in fourths?
A. Drop both pieces of paper from the same height at the same time to see which hits the floor first.
B. Drop the crumpled piece of paper first and count how long it takes to hit the floor, and then repeat the procedure with the piece of paper folded in fourths.
C. Throw the crumpled piece of paper first into the air and count how long it takes to hit the floor, and then repeat the procedure with the piece of paper folded in fourths.
D. Find a partner. Both you and your partner throw the pieces of paper up in the air at the same time and see which piece of paper hits the ground first.
Answers
Answer:
A because it is the most affective way to do it
Explanation:
define velocity and also write their mathematical expression
Answers
PLEASE HURRY
Which correctly lists three properties that are used to identify minerals?
A. luster, weight, streak
B. magnetism, size, weight
C. size, weight, luster
D. streak, luster, magnetism
Answers
Answer:
D.Streak,Luster,Magnetism
Explanation:
Answer:
D. streak, luster, mangnetism
Explanation:
Cuz i took test on edge
An example of a hidden variable would be
Answers
A statement made prior to an experiment, and based on little scientific evidence, is
called a(n)
a) hypothesis
c) theory
b) prediction
d) all of the above
Answers
You usually write hypothesis in science it’s something that can usually be tested.
B- prediction
Made before you do an science experiment, they’re usually like what you think could happen or will happen.
C- theory
Theses aren’t used with scientific evidence, they’re usually things that people believe happened. Example: Some believe Big Foot is real. But no one will ever know because its a theory
D- is already been eliminated, not all are right.
Answer is A
Hope this helped :)
What the relationship between buoyancy and density
Answers
Buoyancy is the tendency to rise or float in a fluid. The upward force exerted on objects submerged in fluids is called the buoyant force.
The formula for buoyant force is
F=ρVg=mg
where
ρ
is the density,
V
is the volume, and
m
is the mass of the displaced fluid.
g
is the acceleration due to gravity (9.81 m·s⁻²).
So the denser the fluid is, the greater the buoyancy and the buoyant force.
Need Help on this image is below thanks.....
Answers
Answer:
Mass , this is the answer because mass allows objects of any size to be moved depending on the force of the impact , push or turn
Which statement about the physical change of liquid water boiling into steam is true? The heat added represents an energy change. The action cannot be reversed. The steam cannot conserve mass. The weight lost represents a mass change.
Answers
Answer:
The heat added represents an energy change.
Explanation:
In a physical change the heat added represents an energy change.
A physical change is a type of change in which a form of matter is affected, but not its chemical composition. That is no new substance is formed during this process.
This change is usually associated with change in energy of the substance.
Examples of these change include;
Melting an ice cube. Boiling of water into steam.Freezing of water, etcThus, in a physical change the heat added represents an energy change.
Learn more here: https://brainly.com/question/18300898
The bottom of a box has a surface area of 31.4cm2. The mass of the box is 47.1 kilograms. Acceleration due to gravity at s3a level is 9.80 m/s2. What pressure is exerted by the box where it rests ?
Answers
Answer:
The correct answer to the physics problem in pressure given above would be 1.5 N.
First, I converted the cm^2 to m^ 2 (31.4 cm^2 = .00314 m^2).
Then I computed for the force (F= mg = (47.1kg)(9.8m/s^2) = 461.58 N)
Consequently, I used the equation of pressure (P = Force/Area).
P = 461.58 N / .00314 m^2
P = 1.47 or 1.5 N
Explanation:
Determine the pressure change when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C. Round your answer to the nearest hundredth.
Answers
Given :
A constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C.
To Find :
The pressure change.
Solution :
By Gay-Lussac's Law :
[tex]\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}\\\\\dfrac{1}{30+273}=\dfrac{P_2}{40+273}\\\\P=\dfrac{313}{303}\\\\P=1.033\ atm[/tex]
Change in pressure,
[tex]\Delta \ P=P_2-P_1\\\\\Delta \ P=(1.033-1)\ atm\\\\\Delta \ P=0.33\ atm[/tex]
Therefore, the pressure change is 0.33 atm.
Hence, this is the required solution.
The change in pressure when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C is 0.033 atm and this can be determined by using the Gay-Lusac's law.
Given :
Pressure, [tex]\rm P_1 = 1\;atm[/tex]Gas heated from 30.0°C to 40.0°CGay-Lussac's law can be used in order to determine the pressure change when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C.
According to Gay-Lusac's law:
[tex]\rm \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
Now, substitute the values of the known terms in the above expression.
[tex]\rm \dfrac{1}{30+273}=\dfrac{P_2}{40+273}[/tex]
Simplify the above expression in order to determine the value of [tex]\rm P_2[/tex].
[tex]\rm P_2 = \dfrac{313}{303}=1.033\;atm[/tex]
Now, the change in pressure is given by:
[tex]\rm \Delta P = P_2-P_1[/tex]
[tex]\rm \Delta P = 1.033-1=0.033\;atm[/tex]
Therefore, the change in pressure when a constant volume of gas at 1.00 atm is heated from 30.0°C to 40.0°C is 0.033 atm.
For more information, refer to the link given below:
https://brainly.com/question/6590381
How long will it take if you travel at 4 m/s for 100m?
10 s
20 s
O
04s
25 s
Answers
A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answers
Answer:
h = 384.4 m
t = 8.5 s
Explanation:
The firework will explode at the highest point. Because it would start to move downward at the highest point. Using 3rd equation of motion:
2ah = Vf² - Vi²
where,
a = acceleration due to gravity at that planet = -10.56 m/s²
h = maximum height = ?
Vf = Final velocity = 0 m/s (since, firework stops at highest point)
Vi = Initial Velocity = 90.1 m/s
Therefore,
2(-10.56 m/s²)(h) = (0 m/s)² - (90.1 m/s)²
h = 384.4 m
Now, we use 1st equation of motion:
Vf = Vi + at
0 m/s = 90.1 m/s + (-10.56 m/s²)(t)
t = 8.5 s
a crowbar having the length of 1.75 metres is used to balance a load of 500 Newton if the distance between the fulcrum and the load is 0.5 metre, calculate .(fiction is neglected ) i. effort applied to balance the load
Answers
Answer:
200 N
Explanation:
Assume that counterclockwise is positive and clockwise is negative.
The 500 N load is 0.5 m from the fulcrum, so the effort force F on the other end is 1.25 m from the fulcrum.
Sum of the torques about the fulcrum equal 0.
∑τ = Iα
(500 N) (0.5 m) − F (1.25 m) = 0
F = 200 N
Can anyone pls help me out in dis i am struggling in dis!
Answers
Answer:
Last option - E
Answer:
The obvious answer would be letter E
Explanation:
What is the base number for the metric system of units? In other words, by what number do we multiply to move up in scale ? _____
Answers
Answer:
10
Explanation:
Each time you want to move up the scale, the number is multiplied by 10. The opposite is true when moving down; you must divide by 10.
Answer:
the answer is 10
Explanation:
............
A graph can be described as:
a. a mathematical diagram.
b. a scientific model.
c. a way to show relationships between variables.
d. All of the above
Answers
....
HELP PLSSS
What is the momentum of A 200 kg shark swimming at 15 m/s? |
Answers
Answer:
3000 Kg.m/s
Explanation:
From the question given above, the following data were obtained:
Mass (m) of shark = 200 Kg.
Velocity (v) of shark = 15 m/s.
Momentum of shark =..?
The momentum of an object is simply defined as the product of the mass and velocity of the object. Mathematically, it is expressed as:
Momentum = mass (m) × velocity (v)
With the above formula, we can obtain the momentum of the shark as follow:
Mass (m) of shark = 200 Kg.
Velocity (v) of shark = 15 m/s.
Momentum of shark =..?
Momentum = mass (m) × velocity (v)
Momentum of shark = 200 × 15
Momentum of shark = 3000 Kg.m/s
Therefore, the momentum of the shark is 3000 Kg.m/s.
What is the instantaneous velocity of B?
What is the instantaneous acceleration at F?
Answers
Answer:
B:0
F:1.33
Explanation:
velocity of B is 0 m/s
you can refer to the graph
acceleration of F =slope of F
4/3=1.33 m/s^2
A. Shape the pot so that it has a wider base and the same size rim.
B. Shape the pot so that it has a wider base and a wider rim.
C. Shape the pot so that it has the same size base and a wider rim.
O D. Shape the pot so that it has a narrower base and the same size
rim.
Answers
Answer:
Answer =
Explanation:
Option A
Plz Mark as brainliest
If a boulder is shoved from the top of a cliff with a velocity of 45m/s, if the boulder travels a distance of 20m from the cliff, how long would it take for the boulder to hit the ground?
Answers
20/45= .44m/s
That should be the correct answer.
I hope that helped. Remember the formula it will help you.
The time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
What is velocity?Velocity is defined as the speed at which an object's position changes in relation to time and a frame of reference.
It can also be defined as the direction of an object's motion as a measure of how quickly its position is changing as seen from a certain point of view and It is measured by a specific unit of time.
There are basically four types of velocity.
Uniform velocityNon uniform velocityAverage velocityInstantaneous velocityVelocity can be expressed as
Velocity = Distance / Time
Time = Distance / velocity
Time = 20 m / 45 m/s
Time = 0.44 m/s
Thus, the time taken by the boulder to hit the ground with velocity of 45 m/sand distance of 20 m is 0.44 m/s.
To learn more about velocity, refer to the link below:
https://brainly.com/question/18084516
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Focus Question: What are SI units, and why are they used?
In 1999, NASA lost the Mars Climate Orbiter because one team used English units
(inches, feet, and pounds) while the other used metric units for a key spacecraft
operation. That was a $125 million dollar mistake... oops! Distance can be measured in
inches, feet, yards, miles, or meters. So, how do scientists know which to use?
Since there are different ways to measure things, scientists and engineers use the
International System of Units, known as Sl units, in order to stay on the same page. This
is important whether you are measuring speed, distance, temperature, or anything else!
To avoid confusion, always show what units of measurement you are using.
.
Answers
Answer:
a system of physical units ( SI units ) based on the metre, kilogram, second, ampere, kelvin, candela, and mole, together with a set of prefixes to indicate multiplication or division by a power of ten.
Explanation:
The problem here was not the error; it was the failure of NASA's systems engineering, and the checks and balances in our processes, to detect the error. That's why we lost the spacecraft.
How do I find out where two cars intersect when I am given velocity for the red car 14.41cm/s and the starting point for the red car 0.6m. I am also given velocity for the blue car 41.32cm/s and the starting point at 0m.
Answers
Explanation:
Write equations for the position of each car as a function of time. (Make sure to convert units if they're different.)
The red car's position x at time t is:
x = (14.41 cm/s) t + 60 cm
The blue car's position x at time t is:
x = (41.32 cm/s) t
To find when they meet, set the equations equal to each other.
(14.41 cm/s) t + 60 cm = (41.32 cm/s) t
60 cm = (26.91 cm/s) t
t = 2.230 s
When elements gain electrons (negative friends), they become more ________
A. positive
B. neutral
C. negative
Answers
A child is pushing a shopping cart at a constant speed of 3.0 m/s. How long will it take this child to push the cart down an aisle with a length of 18.0m?
Answers
Answer:
6 seconds
Explanation:
18 divided by 3 is 6.
1.
If Jane runs a 6 km race, then the distance ran by her in miles is
a 9.6
b 96.6
C 37.3
d 3.73
Answers
Answer:
9.6
Explanation:
to convert km to miles multiply by 1.609
Answer: 3.73
Explanation:I used my head and converted 6km to miles and it was 3.73
Which of the following statements about density is true.
Answers
there is nothing there
A cyclist is travelling at 4 metres per second for 100 metres,
how long does it take?
Answers
Answer:
25 seconds!
Explanation:
I just had to find what number to multiply 4 to get 100 and it was 25
4x25=100
Or you could do the easier way by dividing 100 by 4 which has the same answer: 25
100÷4=25
