[tex] \huge \boxed {\mathcal{Hey \: \: \: there \: \: !!}}[/tex]
solution :we know,
[tex] \boxed{density = \dfrac{mass}{volume} }[/tex]
let the mass of substance be [tex] m_1 [/tex]
and volume be [tex] v [/tex]
density of substance :
[tex]ds = \dfrac{m_1 }{v} [/tex]now, let the mass of water be [tex] m_2 [/tex]
and volume be [tex] v [/tex]
density of water :
[tex]dw = \dfrac{m_2}{v} [/tex]relative density :
[tex] \dfrac{ds}{dw} [/tex][tex] \dfrac{m1}{v} \div \dfrac{m2}{v} [/tex]since, volume is same they would cancel off
[tex] \boxed{relative \: \: density \: \: = \dfrac{m1}{m2} }[/tex]proved...
the spring constant for each of these springs 100 000 N m-1. Calculate the distance that each of these rear springs is compressed by this vehicle as shown in the diagram above
Answer:
sorry
Explanation:
1. Peter throws four stones having the same weight on four different surfaces. The surfaces aee icy, sandy, dry and cemented. He throws the stones with the dame force. On whoch of the given surfaces will the stone go to the maximum speed before it stops?
2. ____ is the body shape which offers very little resistance to the flow of air.
3. Spring balance is a device used for measuring the ______ of an object
Answer:
1. Icy
This is so because the icy surface will be slippery due to ice and water residue on it. Not only the stone, anything that goes on the icy surface is likely to slip. There won't be much friction offered by the surface.
If we talk about the sandy surface, the stone won't go far and will be stopped at the nearest point possible and it's also possible that the stone will settle down in the surface.
The dry and cemented surfaces will cause friction when the stone will be thrown on them, which will stop the stone from going far away.
2. Streamline is the body shape which offers very little resistance to the flow of air.
3. Spring balance is a device used for measuring weight of an object object.
(or the force acting on an object)
Help Me Please I’m Give You Brainiest
6H2O + 6CO2 → C6H12O6 + 6O2
6H2O + 6CO2 → C6H12O6 + 6O2It is photosynthesis.
If the reaction was opposite then it was cellular respiration.
C6H12O6 + 6O2 → 6H2O + 6CO2
If a 60 W light bulb, powered with 620,000 J of energy, in a bedside lamp is only 20 percent efficient in converting electrical energy into light energy, how many joules of light energy does this light bulb produce each time?
Answer:
720 Joules
Explanation:
Given: 60 W light bulb powered by 620,000 J of energy. 20 percent efficient in converting electrical energy into light energy
To find: how many joules of light energy does this light bulb produce each time?
Formula: [tex]E = \frac{hc}{A}[/tex]
Solution: The total amount of energy generated by the light bulb every minute is 3600 Joules. If the light bulb is only twenty (20) percent efficient in converting that energy to visible light energy, that would be twenty percent of the total.
E (Joules) = P (Watts) X t (seconds)
E = 60 W X 60 seconds
E = 3600 Joules of energy
20% of 3600 = 720 Joules
Therefore, it produces 720 joules of light each time.
Heat is the measurement of energy from all the particles that are in a substance.
Please select the best answer from the choices provided : T/F
Explanation:
the correct answer is (true) if am not mistaking incase am wrong sorry
Any wave of any kind will change direction when it encounters an obstacle. This bending is called
Group of answer choices
resonance
the photoelectric effect
interference
diffraction
Answer:
diffraction is the correct answer
Which position has the least amount of kinetic energy?
the position that has least kinetic energy is option D
An object is 10.0 cm from a plane mirror. The object is 5.00 cm tall.
a. What is the image position?
Answer:
...............
Explanation:
If an object is placed in front of a plane mirror, the size of the object remains same. This is the property of plane mirror. So the height of the object will be 10cm only.
The image position in the plane mirror is 5 cm.
What is meant by magnification ?The ratio of the height of the formed image to the height of the object is used to define the magnification created by the mirror.
Here,
Position of the object, u = -10 cm
Height of the object, h = 10 cm
We know that magnification produced by a plane mirror is 1.
So,
Magnification, m = -v/u
1 = -v/u
Therefore, image distance,
v = -u
v = 5 cm
Hence,
The image position in the plane mirror is 5 cm.
To learn more about magnification, click:
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what does thermal energy do
Answer:
Thermal energy can be transferred to one object to another in the form of heat. It causes molecules and atoms to collide with each other because of the rising of heat.
Explanation: Well thermal energy is a example of kinetic energy. It is heated by motion. It is heat that can be measured
POSSIBLE 1. Which of the following are examples of a physical reactions: (1) ice melting, (2) pencil breaking, (3) iron rusting, (4) wood burning? a. 1.4 b. 3,4 c. 2.3 d. 1,2
Answer:
D) 1 & 2
Explanation:
Ice melting can be refrozen and although the pencil breaks, it doesn't change the chemical formula of the pencil
a uniform resistance wire is stretched till its length becomes 4 times what happens to the resistance
use the kinetic theory of matter to explain thermal expansion in liquids
Charlotte is driving at 57.4 mi/h and receives a text message. She looks down at her phone and takes her eyes off the road for 4.96 s. How far has Charlotte traveled in feet during this time
Answer:
418.18 feet
Explanation:
Applying,
v = d/t.................. Equation 1
Where v = velocity, d = distance, t = time.
make d the subeject of the equation
d = vt............ Equation 2
From the question,
Given: v = 57.4 mi/h, t = 4.96 s = (4.96/3600) h = 1.38×10⁻³ h
Substitute these values into equation 2
d = (57.4×1.38×10⁻³)
d = 0.0792 mi
Converting from miles to feet
d = (0.0792×5280) feet
d = 418.18 feet
What element is found the following nuclear reaction
Answer:
h
Explanation:
Kelli has a mass of 42-kg, and she is sitting on a playground swing that hangs .4m above the ground. Her mom pulls the swing back and releases it when the seat is 1 meter above the ground. How fast is Kelli moving when the swing passes through its lowest point?
Answer:
3.4 m/s
Explanation:
may i be marked brainliest?
E(P)=m*g*h
=42*10*1
=420 J
E(P)=E(K)
E(K)=1/2MV^2
420=½*42*V^2
V^2=20
V=4.47
What is velocity ?"Velocity is essentially a vector quantity. It is the rate of change of distance. It is the rate of change of displacement. Speed of an object moving can never be negative. The velocity of a moving object can be zero. "
Know more about velocity here
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does earths rotation on its axis And its movment through space time give us gravity?
Answer:
yes
Explanation:
moving earth makes us stand on ground
Answer:
the rotation of the earth can affect your weight but not gravity
please dont waste my time with those 'answer is in the file"
The force exerted by water and air on the skier is 50 Newtons (N) to the left. The force exerted by the boat on the skier is 40 Newtons (N) to the right. How will the unbalanced forces change the motion of the skier
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the concept of Net force on a body.
We know that net force on a body is the force that is calculated from all direction and added , if there is any force remained at last, then the forces are unbalanced,
and if the net force on a body is Zero, then it is a balanced force,
here,
Force to left on skier = 50 N
Force to right on skier = 40 N
hence the net force = left force - right force
Net force = 50 - 40 ==> 10 N
hence the Net force is 10 N in the left direction of the skier.
A ___ is a large ball of gas that generates its own energy. This energy is created by the fusion of ___ atoms to make ___.
Answer:
Star, hydrogen and energy
Explanation:
A star is a large ball of gas that generates its own energy by fusing hydrogen atoms to make helium. It is held together by its own gravity. This process emits a tremendous amount of energy, and some of the energy is in the form of light.
The energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. When the core is hot enough, nuclear fusion commences. Fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.
Light of wavelength 505 nm passes through a single slit of width 4.32 x 10-5 m. At what angle does the first interference minimum (m = 1) occur?
Answer:
0.665
Explanation:
I did the work. Just plug everything in from the formula. Look at the lesson manual.
HELP ME SHIFT TO MHA PLEASE, (I have aphantasia, so I cant visualize ) But I want to shift, so please help me :(
Answer:
1 + 3 = 7. X = 2 -9+7=8
Explanation:
Here,
on what factors, current sensitivity voltage sensitivity of
a galvanometer depend?
[tex]\boxed{\underline{\bf \: ANSWER}}[/tex]
The current sensitivity of a galvanometer depends upon the following factors :-
number of turns.coil area.restoring force per unit twist.magnetic field.___________
Hope it helps.
RainbowSalt2222
A solid metal ball with a mass of 10.0 kg is placed on a smooth floor what force would be needed to accelerate the ball at a rate of 2.0 m/s2.
40 N
20 N
5 N
0.2 N
Which of the following in the list is the best conductor: plastic, metal, styrofoam, or glass?
Answer:
Metal
Explanation:
Answer:
metal is the best conductor. the others are insulators
why thermos flask used
Answer:
Explanation:
A thermos helps prevent heat loss when the thermos is holding a hot substance and then helps prevent heat gain when the thermos is holding a cold substance. So a thermos can keep hot things hot and cold things cold.
In chemical reactions, energy is absorbed or released in the form of:
a) Sound
b) Heat
c) Light
Answer:
Heat
Explanation:
Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released. Heat is often produced as a by-product of a chemical reaction – this is called an exothermic reaction.
Hope this helped.
Explanation:
Answer Should be B.
Its in Form of Heat.
A sound wave enters a new medium where sound travels faster. How does this affect the frequency and wavelength of the sound?
OA. The frequency Increases and the wavelength decreases.
OB. The frequency decreases and the wavelength increases.
OC. The frequency stays the same and the wavelength increases.
OD. The frequency stays the same and the wavelength decreases.
ОЕ. Neither the frequency nor the wavelength is affected.
The frequency stays the same and the wavelength increases.
Explanation;
Sound waves are a type of mechanical wave which requires a material medium for transmission. The transmission of such waves occurs as a result of vibration of particles in the material medium. The faster the vibration of the particles the higher the speed of the sound waves.
When a sound enters a new medium where the sound travels faster, it means the vibration of particles is high, and the wavelength of the waves increases which means the speed of the wave has increased. The frequency on the other hand will remain constant.
Answer:
A. The frequency stays the same and the wavelength decreases
Explanation:(Plato)
Three 18-ohm resistors are connected in series with an ideal 12-volt battery. What is the equivalent resistance of the circuit?
Answer:
RT = 54 Ohms
Explanation:
Given the following data;
Resistance = 18 Ohms
Voltage = 12 Volts
To find the equivalent resistance (RT) of the circuit;
For a series connection, the formula is;
RT = R1 + R2 + R3
RT = 18 + 18 + 18
RT = 54 Ohms
Or
RT = 3*R
RT = 3 * 18
RT = 54 Ohms
What is resultant force
Answer:
resultant force is a overall force acting on a body
hope it helps.
can someone please help me please I will mark brainlist and give you 5 stars pleasee
Answer:
If I did my calculations correctly then the answer is 11 but I may be weong
Answer:
it's 11
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PLEASE HELP WILL GIVE BRAINLIEST
How can diversity within an ecosystem be compromised?
A.)by building structures on natural habitat areas
B.)by regulating human activity within an ecosystem
C.)by helping to maintain habitats that have been disturbed
D.)by leaving the ecosystem alone to fend for itself