Answer:
TRUE
Explanation:
Suppose to a scientist was able to construct a barometer with a liquid being twice denser than mercury, then how would the liquid raise at standard pressure?
Answer:
h = h₀/2, the liquid column rises half the height
Explanation:
Pressure is defined as force per area,
P = F / A
in a barometer the force is the weights of the liquid column
F = W = mg
P = m g/A
if we use the definition of density
ρ = [tex]\frac{m}{A h}[/tex]
[tex]\frac{m}{A}[/tex] = ρ h
we substitute
P = ρ g h
Let's use the index o for the mercury
P₀ = ρ₀ g h₀
when we change the liquid for another with
ρ = 2ρ₀
the pressure expression is
P = 2ρ₀ g h
in the problem they indicate that the pressure is equal to the initial P = P₀
we substitute
ρ₀ g h₀ = 2ρ₀ g h
h₀ = 2h
h = h₀/2
the liquid column rises half the height
8. What is the frequency of green light waves that have a wavelength of 5.2 x 10-7 m.? The speed of light is 3.0 x 108 m/s
Answer:
[tex]f=5.76\times 10^{14}\ Hz[/tex]
Explanation:
We need to find the frequency of green light having wavelength o[tex]5.2\times 10^{-7}\ m[/tex]. It can be calculated as follows :
[tex]c=f\lambda\\\\f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{5.2\times 10^{-7}}\\\\f=5.76\times 10^{14}\ Hz[/tex]
So, the required frequency of green light is equal to [tex]5.76\times 10^{14}\ Hz[/tex].
Rama weighs 48 kg.she is carrying a load of 25 kg up to a height of 15 meter. what work does she do ? Also mention the type of work
Answer:
Explanation:
Total Mass: 48+25=73 kg
Height: 15m
So work = mgh= 73×9.8× 15=10731 j
And this is positive work.
Made up of the crust and tiny bit of the mantle, this layer is divided into several constantly moving plates of what
Answer:
Explanation:
solid rock that hold the continents and oceans
The rhinestones in costume jewelry are glass with index of refraction 1.50. To make them more reflective, they are often coated with a layer of silicon monoxide of index of refraction 2.00. What is the minimum coating thickness needed to ensure that light of wavelength 527 nm and of perpendicular incidence will be reflected from the two surfaces of the coating with fully constructive interference
Answer:
t = 6.6 10⁻⁸ m
Explanation:
In this case we have that the reflection in the film is constructive, we take into account that
* When the light is reflected from the air (n = 1) to the film (n=2) it has a phase change of 180º
* within the film the wavelength is modulated by the index of refact
λₙ = λ₀ / n
taking into account these two aspects the expression for constructive interference is
2n t = (m + ½) λ₀
let's find the minimum thickness (t) of the film
t = (m + ½) λ₀ / 2n
for m = 0
t = ½ 527 10⁻⁹ /(2 2.00)
t = 6.6 10⁻⁸ m
The gravitational force between two bodies is 250N . What will the new force be if one of the masses is tripled?
If one of the masses is tripled, then their product is tripled, and the force between them is tripled. The new force is 750N .
Which are advantages of renewable resources? Check all that apply.
Renewable energy supplies are completely reliable everywhere.
Some renewable resources will never be used up.
Little or no waste is produced by renewable resource plants.
Electricity can be generated in large quantities.
Many renewable energy facilities have lower operating costs.
Answer:
Some renewable resources will never be used up.
Little or no waste is produced by renewable resource plants.
Many renewable energy facilities have lower operating costs.
Explanation:
just did on edge
Answer:
B,C, and E are correct
Explanation:
what is magnetic field
Answer:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
Explanation:
Answer:
Explanation:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields surround magnetized materials, and are created by electric currents such as those used in electromagnets, and by electric fields varying in time.
What is the transfer of energy that occurs when a force causes an object to move?
O Energy
Force
Power
O Work
Answer:
huh? I think it's Power.....
anyone know how to select someone as brainiest?!!!!!!!!!!!!!!!
The diagram below show the alignment of the sun moon and earth
Which diagram shows an alignment in which spring tide takes place
A
B
C
D
Answer:
A
Explanation:
The image that shows an alignment of earth, moon and sun during spring tide is option A. All of them will be in a straight line.
What is spring tide ?A spring tide is a type of tide that occurs when the Earth, sun, and moon are aligned in a straight line. During a spring tide, the gravitational pull of the sun and the moon combine, resulting in higher-than-normal high tides and lower-than-normal low tides.
During a spring tide, the position of the sun, moon, and earth is aligned in a straight line. The gravitational force of the moon and sun both act upon the oceans of the Earth, creating a combined effect that results in unusually high tides.
During a spring tide, the moon is either new or full, which means it is in a position that aligns with the sun and Earth. The gravitational pull of the moon and sun reinforce each other, creating a stronger gravitational force on the Earth's oceans.
This causes the water level to rise higher than normal during high tide and lower than normal during low tide. Here, image A shows the correct alignment.
Find more on spring tides:
https://brainly.com/question/10703247
#SPJ2
6. Calculate the pressure exerted on an elevator floor which has an
area of 6 m², if 20 people whose combined force is 1500 N are
standing on it.
Answer:
Hope this helps you out if you could please leave 5 stars or brainiest thank you
A silver tea spoon is placed in a cup filled with hot tea. After some time, the exposed end of the spoon becomes hot even without a
direct contact with the liquid. This phenomenon can be explained by:
Answer:
As atoms in the spoon vibrates about their equilibrium positions and transfer energy form one end to other end. This process is called conduction.
work and power!
______is the amount of work done over time a. Efficiency C. Power b. Newton d. Horsepower
Answer:
The work done in a unit of time is C. Power.
Explanation:
Hope this helps
Calculate the amount of heat needed to convert 0.8 kg of ice at -19 °C into water at 29 °C.
10. How much total work do you do when you lift a 50 kg microwave 1.0 m off the ground and then push it 1.0 m
across a counter with a force of 50 N?
Work formula:
[tex]W = Fd\cos(\theta)[/tex]
F = 50N, d = 1.0 m
When you lift something straight up, the angle of the force is 90º
cos(90º) is 0, so there's no work done when you lift the microwave off the ground
[tex]W = (50N)(1.0)(0) = 0[/tex]
F = 50N, d = 1.0 m
When you push the microwave, the angle is 0º and cos(0º) is 1. So there is work done here:
[tex]W = (50 N)(1.0m)(1)[/tex]
[tex]W = 50[/tex]
total work = 50 joules
is it true that the radiation that transfer thermal energy is a type of electromagnetic radiation
Answer:
Since heat is carried by electromagnetic waves, it does not need a physical medium to transfer it. Instead it radiates through space - this is how the Earth is heated by the Sun despite space being a vacuum.
Explanation:
What does it take to change the direction or speed of an object
Answer:
An object's speed or direction can be changed by a force. This means a greater force against a lesser force, and it results in acceleration. This means any push or pull against another equal push or pull. It results in no change of acceleration
Explanation:
water flows in a pipe of a terminal of A1=0.02 m2 with a speed of V1=2 m/s. At the second end of the pipe A2=0.04 m2, the speed of flow is V2=_______m/s
What is the velocity of a wave with a frequency of 45 Hertz and a wavelength of 3 meters?
Explanation:
By using v=( f )x( lambda )
v= 45 s^-1 x 3 m
Therefore v = 135 ms^-1
Question 2 of 5
What is an example of anaerobic exercise?
A. Walking
B. Lifting weights
C. Swimming
D. Dancing
SMIT
How bones do humans have ??
Answer:
206
Explanation:
The axial skeleton, comprising the spine, chest and head, contains 80 bones. The appendicular skeleton, comprising the arms and legs, including the shoulder and pelvic girdles, contains 126 bones, bringing the total for the entire skeleton to 206 bones.
A fully grown adult features 26 bones in the spine, whereas a child can have 34.
Answer:
The human body is made up of 206 bones
Question 1 and 2 and 3 physics lesson homework
Answer:
Jackson 2: Smart 3: Ahmed
Explanation:
square + circle = egg
oops, wrong guy
Which two elements are the most abundant in the Earth's crust? A. silicon and oxygen B. silicon and magnesium C. iron and nickel D. iron and magnesium
Answer: A. silicon and oxygen
Explanation:
The two most abundance elements in earth's crust are silicon and oxygen.
The most abundant element in earth's crust is Oxygen (O) which has a percentage composition of 46.6%. Oxygen is mainly present as silicates, carbonates, sulphates etc.
The second most abundant element in earth's crust is Silicon (Si) which has a percentage composition of 27.7% . Silicon is present in the form of silicates.
The third most abundant element in earth's crust is aluminium (Al) which has a percentage composition of 8.1 %.
The fourth most abundant element in earth's crust is Iron (Fe) which has a percentage composition of 5.0 %.
Answer:
A
Explanation:
What should food workers do to prevent chemical hazards from contaminating food?
A. Wash their hands after taking out the garbage
B. Wear a hair net when working for food preparation areas
C. Store cleaning solutions and bottles away from food storage areas
D. Clean and San at is equipment and utensils for after hours of continuous use
The wave above has a wavelength of 6.25 meters and a frequency of 5 hertz. Calculate the speed.
Answer:
Wave Speed (m/s)
31.25
Summary
Wavelength (m)6.25
Frequency (hz)5
Explanation:
https://calculator.academy/wave-speed-calculator/#f1p1
why must the lamina swing freely in physics
Answer:
Unless the lamina is able to move freely under the influence of gravity, you do not know where to draw that line.
Explanation:
Why are the oceans movements along the What do ocean waves have in common with the sound and light
Answer:
Oceanic currents an waves are in motion due to energy of wind.
Explanation:
When the wind blows across the ocean water ts creates a pull and push effect. It pulls the top layers of water and creates a frictional drag force that leads to the movement of water molecules and appears that the surface is moving. The movement can be seen in the form of surface oceanic currents and waves that are found through the entire globe. The ocean waves and currents carry with them the energy from one place to another.
Xander reached a final velocity of 4.5 m/s for 3.5 seconds. Finley reached a final velocity of 3.6 m/s for 4.2 seconds. Max reached a final velocity of 7.3 m/s for 1.2 seconds. They all started at the same location from rest. Which lists them from least to most acceleration? Max Finley Xander Max Xander Finley Xander Finley Max Finley Xander Max
Answer:
Finley, Xander and Max
Explanation:
v = Final velocity
t = Time
u = Initial velocity = 0
a = Acceleration
From kinematic equations we get
[tex]v=u+at\\\Rightarrow a=\dfrac{v-u}{t}=\dfrac{v-0}{t}\\\Rightarrow a=\dfrac{v}{t}[/tex]
Xander
v = 4.5 m/s, t = 3.5 s
[tex]a=\dfrac{4.5}{3.5}\\\Rightarrow a=1.29\ \text{m/s}^2[/tex]
Finley
v = 3.6 m/s, t = 4.2 s
[tex]a=\dfrac{3.6}{4.2}\\\Rightarrow a=0.86\ \text{m/s}^2[/tex]
Max
v = 7.3 m/s, t = 1.2 s
[tex]a=\dfrac{7.3}{1.2}\\\Rightarrow a=6.083\ \text{m/s}^2[/tex]
The required list is Finley, Xander and Max.
Answer:
Finley, Xander and Max
Explanation:
It is the disturbance or oscillation that travels through space and matter, accompanied by a transfer of energy.
Answer:
wave
Explanation:
A wave is defined as the disturbance that causes the movement of energy. The energy is transferred as the waves move from one place to another. A medium is required for the transfer of energy. Usually a wave travels through air or water. The process is carried on at a specific speed that is termed as the speed of propagation.
