Answer:
I am extremely sorry, but I cannot answer your questions, because there aren't any.
Explanation:
I don't see any questions, or else my eyes are not working properly.
PLEASE HELP
Which of the following is a force?
Momentum
Friction
Acceleration
Velocity
I need help with this. Lab: Conservation of Linear Momentum
Assignment: Lab Report Urgent!!
which statement best compares and contrasts two physical properties of natter
Answer:
D.
Explanation:
There are three physical properties of matter that involves solid, liquid and gas.
The last statement is correct as it says: boiling and melting points are similar as both changes the physical state of matter. But are different as boiling point changes liquid into gas for example: liquid at high boiling point changes into vapors (gas) and melting point changes solid into liquid for example: ice at high melting point changes into liquid.
Hence, the correct option is "D".
Which diagram represents an open circuit?
A. Circuit D
B. Circuit C
C. Circuit B
D. Circuit A
What happens to an object's gravitational potential energy as it falls from some height?
Answer:
Decreases
Explanation:
As an object falls from some height, the gravitational potential energy of the object decreases.
Potential energy is the energy due to the position of a body.
The potential energy is mathematically expressed as:
Potential energy = mass x acceleration due to gravity x height
So, potential energy is directly proportional to mass and height.
The higher the mass and height, the more the potential energy.
The work output of a lever used to lift books is 30 Joules and the work input is 60 Joules.
What is the efficiency of this lever?
Answer:
50%
Explanation:
Given parameters:
Work output = 30J
Work input = 60J
Unknown:
Efficiency of the lever = ?
Solution:
To solve this problem, the efficiency is taken as the ratio of the work output to that of the work input;
Efficiency = Work output / Work input x 100
Efficiency = [tex]\frac{30}{60}[/tex] x 100 = 50%
Sally traveled from Albany to Syracuse on Saturday. The trip took 3.5 hours and she traveled at
an average rate of 62 mph. How many miles did Sally travel? (Don't forget units.)
Answer:
attached below
Explanation:
Why do cells have receptors? Receptors make mRNA. Receptors let the cell know when to let things in and out of the cell. Receptors make spike proteins.
Answer: Cells have receptors because Receptors let the cell know when to let things in and out of the cell.
Explanation:
Cell receptors also called transmembrane receptors are proteins located on the surface of a cell (extracellularly) or inside the cell which receive signals that alters the functions of the cell. The functions of the cells which can be altered includes the alteration in gene transcription and the cell morphology.
Cell receptors are generally categorizes into the following groups:
--> Internal receptors
--> cell surface receptors
--> ion channel receptors
--> G protein coupled receptors
--> enzyme linked receptors
Interaction of cell membrane receptors with specific ligands that bonds to the receptors causes conformational changes in the receptor protein. This in turn, enzymatically activates the intracellular part of the protein or induces interactions between the receptor and the proteins in the cytoplasm that act as second messengers, thereby relaying the signal from the extracellular part of the receptor to the interior of the cell. This enables the cell to know when to let things in or out of it through the information conveyed.
Which property of argon makes it useful for potassium-argon dating?
It decays into potassium.
It is an unstable element.
It remains trapped in rock.
It is useful only for dating newer rock.
Please help 100 points
Answer:
It gets a new rock when it is getting older
Explanation:
pls give me brainlyest
An 10 kg mass has an applied force of magnitude 69N acting on it pushing it to move in the positive x-direction. The mass is on a flat surface that has a coefficient of kinetic (Uk) friction of 0.5.with respect to the object. What is the magnitude of the acceleration of the object?
The net force on the mass in the vertical direction is
∑ F = n - w = 0
and the net horizontal force is
∑ F = A - f = ma
where
n = magnitude of the normal force
w = mg = weight of the mass
m = 10 kg, mass of the … uh, mass
g = 9.8 m/s², mag. of acceleration due to gravity
A = 69 N, mag. of the applied force
f = mag. of kinetic friction
From the first equation, we get
n = mg = (10 kg) (9.8 m/s²) = 98 N
Then the friction force has magnitude
f = µ n = 0.5 (98 N) = 49 N
Solve the mass's acceleration in the second equation:
69 N - 49 N = (10 kg) a
a = (20 N) / (10 kg) = 2.0 m/s²
in the positive x direction.
can anyone help me with this last question?
Answer:
v = 39.6 m/s (first answer option)
Explanation:
Use conservation of mechanical energy.
The starting is completely potential energy and the final is all kinetic energy:
[tex]m*g*h=\frac{1}{2}*m*v^2\\g * h=\frac{1}{2} v^2\\9.8*80=\frac{1}{2} v^2\\v^2=1568\\v\approx 39.6\,\,m/s[/tex]
which agrees with the first answer shown.
Describe your experience with the largest earthquake you have left
Answer:
The largest earthquake ever been recorded is explained below in detail.
Explanation:
Earthquakes are normally produced when stone underground swiftly fractures along a fault. This immediate discharge of pressure causes the seismic waves that make the terrain shake.
Valdivia Earthquake was the most strong quake was the 9.5-magnitude Valdivia Earthquake that punched in Chile in 1960, That quake generated a tsunami, which together slaughtered an approximated 5,700 people.
Help i think its wrong but k
Down
1.Type of energy resource that will never run out - 6 letters
2.Type of energy resource that will never run out - 9 letters
4.Using the Sun’s energy to heat water - 5 letters
Across
3.Ethanol is an example of this type of fuel - 7 letters
5.The burning of these fuels releases carbon dioxide - 6 letters
6.Burning trees is described as carbon ... - 7 letters
7.Damming rivers to generate electricity - 5 letters
8.The energy comes from splitting atoms - 7 letters
Answer:
Hiya your answer's up
Down
6- dioxide
High- and low-pressure areas leading to air movement happen when there are differences in which factor?
atmosphere
precipitation
clouds
density
Answer:
atmosphere
Explanation:
i took the test and got it right
How does heat transfer? (Think temperature)
Answer:
The rate at which temperature changes is proportional to the rate at which heat is transferred.
Explanation:
The temperature of a sample changes more rapidly if heat is transferred at a high rate and less rapidly if heat is transferred at a low rate
a boat is moving across a lake during a race at a rate of 63m/s^2 and reaches a velocity of 96m/s.how long did it take the boat accelerate?
Answer:
1.52s
Explanation:
Given parameters:
Acceleration = 63m/s²
Final velocity = 96m/s
Unknown:
Time taken = ?
Solution:
To solve this problem, we use one of the kinematics equation:
v = u + at
v is the final velocity
u is the initial velocity
a is the acceleration
t is the time taken
So;
96 = 0 + 63t
t = 1.52s
Estimate the monthly cost of using a 700 W refrigerator that runs for 10 hours a day if the cost per kilowatt hours is cents $.20
Answer:
$4.2
Explanation:
Given data
Power= 700W
time= 10 hours
Cost per kilowatt hours is cents $0.20
Let us find the number of hours in a month
=24*30
=720 hours
Energ= power*time
Energy= 700/1000*30
Energy= 7*3
Enery= 21 kwh
1 kwh= 0.2
21kwh= x
cross multiply
x=21*0.2
x= $4.2
What happens to energy and matter when a wave moves through space?
Answer:
energy can move from one location to another, the particles of matter in the medium return to their fixed position. A wave transports its energy without transporting matter.
A wave which propagates in a medium loses its energy while moving from one location to another location but their is no loss in the matter of a wave.
What is the wave nature of light?A wave is a disturbance which propagates through a medium. There is a disturbance, propagation of light, and a medium. A disturbance is a change from the current state of a measurable quantity at some location.
In a wave phenomenon of light, the energy can move from one location to another location, yet the particles of matter in the medium come back to their fixed positions. A wave transports its energy without any transportation of matter.
The wave function for a material particle which moves is called a matter wave. The relationship between the momentum and wavelength for matter waves can be given by the expression: p = h/λ, where, p is the momentum, h is constant and λ is the wavelength of light and the relationship between energy and frequency is E = hf.
Learn more about Waves here:
https://brainly.com/question/29334933
#SPJ5
Household appliances convert electricity into one or more different forms of energy. An electric fan can be described as converting electricity into :
Answer: heat energy, sound energy, and mechanical energy only
Explanation: I did the test in got it right.
It's velocity changes, but its speed remains the same.
The
true or false
Answer:
True
Explanation:
Velocity is a vector quantity, which means that it carries both magnitude and direction. Hence when direction of a particle changes, although magnitude (speed) may remain same, it's velocity changes due to direction change. For ex. A particle is m... A particle is moving along x axis with speed 1m/s, it's velocity will be represented as 1i (i represents unit vector along x)
But if it now starts moving along y axis, it's velocity is 1j (j represents unit vector along y axis). Hence velocity changes with direction.
brainllest pls .
Atoms of the same element that have a different number of electrons are called?
Answer: isotopes
Explanation:
A 2kg mass moving at 1 m/s has a kinetic energy equal to...?
Answer:
kinetic energy = 1/2mv2
= 1/2 x 2 x 3^2
= 9J
Explanation:
It took 80 joules to push a chair 5 meters across the floor. How much force was used?
Answer Maybe try 400
Explanation:
Multiply
Answer:
16 Newtons
Explanation:
The equation for work is Joules = Force x Distance(Meters). Substituting in the values leaves us with 80 = F * 5. Evaluating this equation, we can conclude that the amount of force used was in fact 16 Newtons.
Any characteristic of matter that you can observe is a _________.
Plz help.
Answer:
any characteristic of matter that can be observed without changing the identity of the material. Scientists call a characteristic of matter that you can detect with your senses a Physical property. color, shape, smell, taste, mass, volume, and density.
Explanation:
A 0.02kg bullet is traveling with a speed of 300m/s when it hits a wall. Assuming it comes to rest after traveling 0.1m with constant deceleration into the wall.
1. Calculate the work done by the wall on the bullet as the bullet comes to a stop.
2. Calculate the deceleration of the bullet as it comes to a stop.
Answer:
1. W = 900 J
2. a = -450000 m/s²
Explanation:
2.
First, we calculate the deceleration of the bullet by using 3rd equation of motion:
[tex]2as = V_{f}^{2} - V_{i}^{2}\\[/tex]
where,
a = deceleration = ?
s = distance traveled = 0.1 m
Vf = Final Speed = 0 m/s (it eventually stops)
Vi = Initial Speed = 300 m/s
Therefore,
[tex]2a(0.1\ m) = (0\ m/s)^{2} - (300\ m/s)^{2}\\a = \frac{-90000\ m^{2}/s^{2}}{0.2\ m}\\\\[/tex]
a = -450000 m/s² (negative sign shows deceleration)
1.
Now, we calculate the force using Newton's Second Law:
[tex]F = ma\\F = (0.02\ kg)(-450000\ m/s^{2})\\F = - 9000\ N[/tex]
Negative sign shows decelerating force.
For work done:
[tex]Work\ Done = W = Fs\\W = (9000 N)(0.1\ m)[/tex]
W = 900 J
The term "periodic" helps identify __________ that occur in the table, like electronegativity or atomic radii.
8 Jordan has a twin sister, Kathy. Jordan weighs 36
kilograms, and Kathy weighs 30 kilograms.
Jordan and Kathy like to play on the swing set at
the park. Their father pushes each of them until
they are swinging to the same height. Which is
true about the forces at work?
A. Kathy applied more force to the swing set than
to Jordan.
B. Their father applied more force to Kathy than to
Jordan.
C. Their father applied less force to Kathy than to
Jordan.
D. Kathy applied more force to her father than to
Jordan.
Answer:
Their father applied more force to Jordan than Kathy.
Explanation:
How much potential energy does a 75 kg diver have stepping off the edge of a 5 meter platform?
Answer:
3.678kJ
Explanation:
Given
mass= 75kg
height= 5 m
g= 9.81m/s^2
Required
Potential energy
PE= mgh
substitute
PE= 75*9.81*5
PE=3678.75J
PE= 3.678kJ
A cannon recoils while firing a cannonball. The speed of the cannon's recoil is relatively small because the
Answer:
Explanation:
The canon is heavier than the canon ball.
The box is stationary
Answer:
I hope the answer below helps :
Explanation:
Let the tension force be T in the rope.
The downward forces acting on the system of the boy and the box are the weight of the boy and the weight of the box.
The upward forces are T and T on each side of the rope.
As the system is in a static equilibrium:
[tex]T+T=(10+45)kg \\\\=>T=55kg[/tex]
or 55g or
Newtons=550N , if g=10m/s
The forces acting on the boy are: Tension T, reaction from the weighing machine, and weight 45 g. So,
Normal−reaction of the weighing machine :
[tex]45-T\\45-55\\=-10[/tex]
(i) The weighing machine shows its normal reaction force as the weight of the person standing on it. So weight displayed =-10kg.
(ii) Suppose the man pulls down the rope with a force F and the tension becomes T.
The forces acting downwards on the rope at the two ends are: F, weights of man and the box. The upward forces are Tension T on each side of rope.
The system being in equilibrium:
[tex]2T=F+45kgf+10kgf\\=F+55kgf\\=T=45kgf+\frac{F}{2}[/tex]
=> Normal reaction force from the weighing machine on the man
N=45+F−T=-10kgf+F/2
If N is to become 45kgf, then F has to be 55kgf or 550N
Answer:
The reading on the scale is 539 N.
Explanation:
The given parameters include;
mass of the box, M₁ = 10 kgmass of the boy, M₂ = 45 kgThe reading on the scale = weight of the boy + weight of the box
= M₂g + M₁g
= g(M₂ + M₁)
where;
g is acceleration due to gravity = 9.8 m/s²The reading on the scale is calculated as follows;
W = 9.8(45 + 10)
W = 9.8(55)
W = 539 N
Thus, the reading on the scale is 539 N.
