Answer:
four oxygen
Explanation:
Help
Question 6: Which of these is Not a unit of density?
Answer:
SI
Explanation:
how high is the pole from which the lamp fell freely if it hits the ground at a speed of 15 m/s
Answer & Explanation:
The acceleration due to gravity is about 10 m/s^2.
That means a the speed of a falling object will increase by 10 m/s every second that it falls.
We know that the lamp hits the ground at 15 m/s.
That means the lamp has been falling for
[tex]\frac{15 m/s}{10 m/s^{2} } = 1.5 s[/tex]
Now we use the formula [tex]h = \frac{1}{2} gt^{2}[/tex] to calculate the height, where
h is the height
g is the acceleration due to gravity and
t is the time taken to fall a height of h.
h = 1/2 x 10 x 1.5^2 = 11.25 m
ILL GIVE BRAINLY AND THIS IS 15 POINTS PLZZZ HELPPPPPP
The best thermal insulators _____________________.
have free electrons.
are metals.
conduct heat well.
are gases.
Answer:
have free electrons
Explanation:
they are loosely bound and free to move through the material
use the diagram to identify the four regions of the earthworm.
dorsal side:
ventral side:
anterior end:
posterior end:
here are some pictures
Answer:
Dorsal side:B
Ventral side:D
Anterior end:A
Posterior end:C
Explanation:
The four regions of the earthworm are, A is the anterior end,B is the dorsal side, C is the posterior end, and D is the ventral side.
What are earthworms?Earthworms are common soil dwellers who are both safe and useful. Earthworms help plants flourish by collapsing dead and decaying organic debris into rich humus soil.
They also aerate the soil and enhance flow by digging small canals and holes.
The four regions of the earthworm are;
A is the Anterior end
B is the Dorsal side
C is the Posterior end
D is the Ventral side
Hence all the regions are clearly defined with the help of digrame.
To learn more about the earthworms refer to the link;
https://brainly.com/question/20992190
Which part of the drum (Instrument)vibrates when it produces sound?
Answer:
Striking the head of the drum changes its shape and compresses the air inside the shell. the compressed air presses on the bottom head and changes its shape. then these changes are transmitted to the drum shell and reflected back and this action is repeated created a vibration.
Explanation:
Hope this helped Mark BRAINLEST!!!
1)A 2.0 kilogram wooden object is a on a wooden surface. What is the maximum force of friction that can be produced in this system?
Answer:
fr = 7.84 N
Explanation:
To solve this exercise we must use Newton's second law, the case of translational equilibrium
F -fr = 0
F = fr
where F is the applied force and fr the friction force
for the Y axis
N -W =
N = W
N = m g
the friction force has the equation
fr = μ N
fr = μ m g
in this case they indicate the two materials that are in contact with wood on wood, so when reviewing the tables the coefficient of static friction is μ=0.4
let's calculate
fr = 0.4 2.0 9.8
fr = 7.84 N
Can someone help me with these questions pls
PLEASE PLEASE HELPPPP
Answer: 8 volt battery in each device.
I think the units is 7.
Explanation:
A student reads that soil is formed in part due to the weathering of rocks. The student lists methods in which rocks break down in a chart, as shown.
Weathering of Rocks
1. Acid rain dissolves rock elements
2. Temperature fluctuations cause cracks and fissures in rocks
3. Animals break apart rocks when forming underground burrows.
4. Plant roots apply pressure on rocks
which are accurate methods of the weathering of rocks?
1 and 2 only
3 and 4 only
1.2 and 4 only
1.2.3. and 4
As the amplitude of a mechanical wave increases, which of the following quantities
increases?
A.wavelength
B.frequency
C.energy
D.speed
.c ...energy
Explanation:
Amplitude does not affect wavelength. It also does not affect wave speed. Amplitude is the energy of the wave measured from the rest position to the top of the crest. A wave with more energy has a higher up crest/ higher amplitude.
As the amplitude of a mechanical wave increases, the quantity which increases is: C. energy.
What is a mechanical wave?A mechanical wave can be defined as a type of wave that requires a medium for its propagation and it creates a disturbance in the medium. Thus, a good example of mechanical wave is sound wave, which is typically transported in a perpendicular direction.
What is amplitude?Amplitude refers to the maximum displacement of a wave when measured from its equilibrium position. Also, the amplitude of a mechanical wave has no effect on the following:
WavelengthSpeedFrequencyRead more on wave here: https://brainly.com/question/19250621
IS THIS CORRECT???...........................
Answer:
A. consumers
B. multi-cellular
Explanation:
Only plants have chlorophyll and only plants have a cell wall so C and D are out of the window. They are consumers because, they don't have photosynthesis so they have to eat. They are multi-cellular because, animals all have at least a brain, body, etc. Which all need millions of cells.
Calculate the force of gravity between two protons located 1m apart 1.7x10-27kg charge of proton is +1.6x10-19c
Answer:
87, not very hard but u have to keep trying ❤❤❤❤❤❤❤
A small motor uses 200 watts to do 4000 joules of work. How much time this take to occur?
What are 5 movements/skills that you are able to do because of your muscles?
Please help this is due today and I really need help.
One movement is walking. A skill we use is writing. Another movement is blinking. Another skill we use with muscles is typing. And finally, another skill we use muscles during is brushing your teeth.
Given that the frequency of an Em wave is 4THz, what is its wavelength? a) 75,000um b) 75,000nm c) 75,000pm d) 75,000A
Answer:
λ = 75 µm, correct is A
Explanation:
In waves, speed is related to wavelength and frequency
c = λ f
λ = c / f
in this exercise indicate the frequency of rationality
f = 4 THz = 4 10¹² Hz
let's calculate
λ = 3 10⁸/4 10¹²
λ = 7.5 10⁻⁵ m = 75 10⁻⁶ m
λ = 75 µm
The velocity of a car increases from 10 km/h to 50 km/h in 5 seconds. What is its acceleration?
Answer:
2.22m/s^2
Explanation:
How long does it take a 100 kg rocket to increase speed from 10
m/s to 200 m/s with a force of 250N?
Answer:
76 seconds
Explanation:
Using the formula t=vf-vo/a, where t=time, vf= final velocity, v0= initial velocity, and a= acceleration, we can solve for your problem.
Plug in known variables...
t=200-10/a
we can solve for a by using the formula F=ma where f=force, m= mass, and a=acceleration and rearranging it to solve for a.
a=F/m
Plug in known variables...
a=250N/100kg
a=2.5m/s^2
Plug in our newly found acceleration of 2.5 m/s^2 into our first equation and solve....
t=190/2.5
t=76 seconds
9. During an egg toss, a catcher must cushion the egg by maximizing the time it takes to stop the
egg. Find the impulse applied to a 60.0-gram egg, if the egg has an initial velocity of 6.0 m/s as it
first touches the catcher's hand, and the egg is stopped within 50.0 cm.
Answer:
the impulse experienced by the egg is 0.053 kgm/s.
Explanation:
Given;
mass of the egg, m = 60 g = 0.06 kg
initial velocity of the egg, u = 6 m/s
height moved by the egg, h = 50 cm = 0.5 m
Determine the final velocity of the egg as it moves upward;
v² = u² + 2(-g)h
v² = u² - 2gh
where;
v is the final velocity
-g is negative acceleration due gravity as it moves upward
v² = 6² - 2(9.8 x 0.5)
v² = 26.2
v = √26.2
v = 5.12 m/s
The impulse applied to the egg is the change in linear momentum;
J = ΔP
ΔP = mu - mv
ΔP = m(u - v)
ΔP = 0.06(6 - 5.12)
ΔP = 0.053 kgm/s
Therefore, the impulse experienced by the egg is 0.053 kgm/s.
Write down the use of light pipe.???
An Olympic high diver (mass = 70 kg) stands on a platform 20 m above the surface of the water. What is the diver's gravitational potential energy?
Answer: 13720
Explanation: the equation is....
(70 kg) (9.8 m/[tex]s^{2}[/tex]) (20 m) = 13720The mass of an object is 0.201 kg. The object requires 15.0 J of heat to
raise its temperature by 283 K. What is the specific heat of the object? *
Answer:
49k
Explanation:
yes you can go with me
A 60 W light bulb has a resistance of 880 Ω
Calculate the CURRENT.
Write your answer in Amps to TWO SIGNIFICANT FIGURES
[tex] \sf{• \: Power \: (P) = 60 \: w}[/tex]
[tex] \sf{• \: Resistance \: (R) = 880 \: Ω}[/tex]
[tex] \\ [/tex]
[tex]\bf{ \underline{To \: Find :- }}[/tex][tex] \sf• \: The \: Current \: (I).[/tex]
[tex] \\ [/tex]
[tex] \huge\bf{ \underline{ Solution :- }}[/tex]
[tex] \sf We \: know \: that,[/tex]
[tex] \bf \red {\bigstar{ \: P = I^{2} R}}[/tex]
[tex] \rightarrow \sf 60 = I^{2} \times 880[/tex]
[tex] \rightarrow \sf \frac{60}{880} = I^{2} [/tex]
[tex] \rightarrow \sf I^{2} = 0.0681[/tex]
[tex] \rightarrow \sf I = \sqrt{0.0681}[/tex]
[tex] \rightarrow \sf I = 0.261 \: \: (approx.)[/tex]
[tex] \\ [/tex]
[tex]\bf The \: \: value \: \: of \: \: I \: \: is \: \: 0.261 \: \: Amps. \: \: (approx.)[/tex]
We have a 10 m resistance wire of the isachrom 60 type. The resistance of this wire is 5.65 Ω / m at 20 ° C. The wire has a diameter of 0.50 mm.
a. Calculate the resistivity of isachrom 60 at 20 ° C.
Answer:
[tex]\rho=1.10\times 10^{-7}\ \Omega[/tex]
Explanation:
Given that,
The length of the resistance wire, l = 10 m\
The resistance of this wire is 5.65 Ω/m
The diameter of the wire, d = 0.5 mm
Radius, r = 0.25 mm = 0.00025 m
We need to find the resistivity of isachrom 60 at 20°C. The formula for the resistance of a wire is given by :
[tex]R=\rho\dfrac{l}{A}\\\\\rho=\dfrac{RA}{l}\\\\\rho=\dfrac{R\pi r^2}{l}\\\\\rho=\dfrac{5.65\times \pi \times (0.00025)^2}{10}\\\\\rho=1.10\times 10^{-7}\ \Omega[/tex]
The resistivity of the wire is [tex]1.10\times 10^{-7}\ \Omega[/tex].
What is the mass of a bicycle traveling at a speed of 5 m/s and with a kinetic energy of 125 J?
Answer:
K. E= 1/2MV²
125 = 1/2M5²
multiply both side by 2
250 = 25M
M= 10kg
Complete the statements about convection currents. Convection currents occur in fluids because of temperature and differences. Convection currents transfer energy throughout a fluid. They continue until all of the fluid is at the same temperature.
Answer:
density; thermal
Explanation:
Convection currents occur in fluids because of temperature and density differences. Convection currents transfer thermal energy throughout a fluid.
When a fluid is heated, the molecules closest to the heat source gets heated first and their temperature is raised. The rise in temperature lowers their density and as such, they move to the upper portion of the fluid to be replaced by yet-to-be-heated molecules at the upper portion.
When the replacement molecules also get heated, the same process occurs and a to-and-from rotational movement of molecules, also known as convection current, is created within the fluid. The to and from movement, thus, transfer thermal energy within the fluid until all the molecules within the fluid are at the same temperature.
Answer
density; thermal
Explanation:
its right i just did it
Someone plz help I’m on a time limit :(
What patterns occur in the Earth-Sun-Moon system that allow us to identify the cause of
eclipses?
Answer:
Earth's rotation and orbit and the Moon's orbit cause observable patterns (Day and night, seasons, phases of the Moon, tides).
Distance and direction of an object's change in position from a starting point are:
Answer:
An object changes position if it moves relative to a reference point. The change in position is determined by the distance and direction of an object's change in position from the starting point (displacement). Direction • Direction is the line, or path along which something is moving, pointing, or aiming.
Explanation:
Answer: An object changes position if it moves relative to a reference point. The change in position is determined by the distance and direction of an object's change in position from the starting point (displacement). Direction • Direction is the line, or path along which something is moving, pointing, or aiming.
Explanation: BRAINLIEST?
please help me out here
Answer:
Explanation:
it's blocked for me...it was unblocked but you know how everything else is blocked
Which of the following statements describes the electric force between a positive particle and a negative particle as they approach each other?
Answer:
They will Attract each other and act like magnets
Explanation:
When 2 positive or 2 negative particles are near each other they repel. When 2 neutral particles are together they do nothing, but when a positive and a negative are together their charges sort of overlap each other and they attract.
An object accelerates at 50 m/s/s with a force of 100 N. What is its mass?
Answer:
Explanation:
A change in an object’s motion—such as Xander speeding up on his scooter—is called acceleration. Acceleration occurs whenever an object is acted upon by an unbalanced force. The greater the net force acting on the object, the greater its acceleration will be, but the mass of the object also affects its acceleration. The smaller its mass is, the greater its acceleration for a given amount of force. Newton’s second law of motion summarizes these relationships. According to this law, the acceleration of an object equals the net force acting on it divided by its mass. This can be represented by the equation:
Acceleration=Netforce-Mass or a=F/m