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 .
The speed of a sound wave depends on....
A: both the medium's temperature and the density of the medium
B: the density of the medium
C: the medium's temperature
D: the frequency
What is the elevation of point B?
What about F?
Explanation:
Since I can only do this by observation, the elevation of F is approximately 850km and the elevation of B is 925km.
Mikael runs with a speed of 3 m/s for 45 seconds. How far does Mikael run?
Answer:
135
Explanation:
Multiply 3x45 So the overall answer is 135
Answer:
d-135m
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.
A 10-kg box Initially at rest and moves along a frictionless horizontal surface. A Horizontal force to the right as applied to the box. The magnitude of the box change of the function of time as shown
b. What is the velocity of the box at 10 seconds? Show your work.
c. If you want to apply at constant force starting at 10 seconds, that would stop the box at exactly 20 seconds. What would the magnitude and direction of that force be? Show your work
Answer:
b. 1.1 m/s c. -1.1 m/s
Explanation:
b.
m x v=f x t
The mass is 10 kg
10 x v (equation for momentum) = f x t (impulse)
you would find the impulse by finding the area under the graph, and then dividing by the mass
So in this case:
10 x v = 11
then divide by the mass
v = 11/10
v= 1.1 m/s
c.
F x t = impulse
we are trying to find force (magnitude)
impulse/t = F
we said that in order for it to stop the impulse for b would be 11, so if thats the case it would be 11 but it would be negative because when going in a positive direction and suddenly stopping the direction changes.
-11/t = F
to find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.
-11/10 = F
F= -1.1 m/s
Answer B:
The velocity of the box at 10 seconds is :
Formula :m x v=f x t
Given Information :
Mass(m)=10kg
10 x v (equation for momentum) = f x t (impulse)10 x v = 11v = 11/10v= 1.1 m/sTherefore, the velocity of the box at 10 seconds is 1.1m/s.
Answer C:
The magnitude and direction of that force be :
Formula:F x t = impulse
impulse/t = F-11/t = FTo find t all we need to do is find the amount of seconds between 10 and 20, that would be 10.
-11/10 = FF= -1.1 m/sThe magnitude and direction of that force will be -1.1m/s.
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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
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
1 method of producing AC electricity from a RENEWABLE resource and NON-RENEWABLE resource
Answer:
See the explanation below.
Explanation:
An example of renewable energy is wind energy, since the planet by means of pressure variations among other natural phenomena presents air currents that can rotate the propellers of energy-generating turbines. This energy is renewable because the wind is used as a source of this energy.
An example of non-renewable energy is oil as it has been formed by carbon-containing fossils that have remained in the Earth's layers for millions of years. It is a non-renewable source since the amount of oil is finished after its total extraction from one well and for the generation of another well will depend on geological processes that last millions of years.
Which of the following organisms is a decomposer?
a plant
a tiger
a mushroom
a deer
All of following are types of kinetic energy EXCEPT for: *
O sound energy
O thermal energy
Olight energy
O chemical energy
O mechanical energy
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.
What is the value of the GPE store for a 10 kg object held 50 m above the surface of the Earth (assume g = 10 N/kg)?
Answer:
5,000J
Explanation:
GPE = mass x gravity x height
GPE = 10 x 10 x 50
= 5,000
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.
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:
2 forces of magnitude, 5N and 8N respectively act at the same point and are inclined at 45 degree. Calculate the magnitude of the resultant force
Answer:
F = 36.956 N
Explanation:
The magnitude of the resultant force will be;
F = F1 × F2 × cosθ.
We are given;
F1 = 5 N
F2 = 8 N
The angle between the 2 forces is 45°
Thus, angle between each force and the vertical axis is 45/2 = 22.5°
F = 5 × 8 × cos 22.5
F = 40 × 0.9239
F = 36.956 N
help answer all for prize
Explanation:
Average speed =total distance ÷ total time
speed = d ÷ t
d= 74400
t= 16
then,
speed = 74400÷16
=4650
The term "periodic" helps identify __________ that occur in the table, like electronegativity or atomic radii.
WILL GIVE BRAINLIEST IF CORRECT
How much heat is needed to raise the temperature of 100 g of water by 50 K, if the specific heat of water is 4184 J/kg°K
Answer:
Q = 20900 [J]
Explanation:
We must use the following energy equation to determine heat transfer, based on specific heat, mass, and heat transfer.
[tex]Q=m*C_{p}*DT[/tex]
where:
Q = heat energy [J]
Cp = specific heat = 4184 [J/kg*K]
m = mass = 100 [g] = 0.1 [kg]
DT = temperature change = 50 [K]
[tex]Q= 0.1*4180*50\\Q=20900[J][/tex]
plz help help me i have one minute
Answer:
the answer is C
Explanation:
this is because pressure is defined as the force acting per unit area thus,
the lower the area the higher the pressure
this can be explained by This,
will you experience pain if touch the tip of the needle or your pen
the area in the needle is less thus, more pressure
hope this helps,
What is a magnet in your own words
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
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
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.
Atoms of the same element that have a different number of electrons are called?
Answer: isotopes
Explanation:
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.
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Which diagram represents an open circuit?
A. Circuit D
B. Circuit C
C. Circuit B
D. Circuit A
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%
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:
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:
