Answer: becuase----Mercury is the only one in liquid state at room temperature. It's used in thermometers because it has high coefficient of expansion. ... It also has a high boiling point which makes it very suitable to measure higher temperatures. Also, it has a shiny appearance and doesn't stick to the glass surface of glass.
Explanation: hope i helped c:
Which would increase the speed of a sound wave?
Answer:
I would say temperature
Which statement correctly describes these electric field lines
Answer:
ok
Explanation:
the correct answer is C please follow me
Which court case provided for Judicial Review?
Answer:
The best-known power of the Supreme Court is judicial review, or the ability of the Court to declare a Legislative or Executive act in violation of the Constitution, is not found within the text of the Constitution itself. The Court established this doctrine in the case of Marbury v. Madison (1803).
2. A mixture of mercury and copper is an example of
a) solid and solid
b) liquid and solid
c) solid and liquid
d) liquid and liquid
Answer:
b
Explanation:
liquid and solid
hope that helps :)
b
Explanation:
option b would be the answer
The longer the handle the __________ the mechanical advantage and the greater the increase in force that is applied to the bolt. Less
Answer:
Greater
Explanation:
The longer the handle the greater the mechanical advantage and the greater the increase in force that is applied to the bolt.
Mechanical advantage can be said to be the rate at which a particular force is multiplied.
This then means that there is a comparison between the output force and that of the input force.
The longer the handle gets, the more the mechanical advantage of the bolt and this also translates to it requiring lesser force being applied on it..
The Biot-Savart force law predicts the force on a charge moving ____ to a magnetic field.
a.perpendicular
b.parallel
The figure below shows two forces A=15 N and B=5 N acting on an object. What is the
resultant force on the object?
Answer:
18.03 N
Explanation:
From the fiqure below,
Using parallelogram law of vector
R² = 15²+5²-2×5×15cos(180-60)
R² = 225+25-150cos120°
R² = 250-150(-0.5)
R² = 250+75
R² = 325
R = √325
R = 18.03 N
Hence the resultant force of the object is 18.03 N
A car traveled a distance of 30 km in 20 minutes (1/3 hours). What was the
speed of the car?
O A. 90 km/hr
O B. 60 km/hr
O c. 30 km/hr
O D. 10 km/hr
Complete these sentences to identify the types of interference. The type of interference that increases the energy of the resulting wave is called interference. The type of interference that results in a loss of energy is called interference.
Answer:
the result is an increase in energy, this is the so-called CONSTRUCTIVE INTERFERENCE.
resulting energy is zero, this is the so-called DESTRUCTIVE INTERFERENCE
Explanation:
When we have an interference process the optical paths of the two rays are added, when the incident rays arrive in phase the result is an increase in energy, this is the so-called CONSTRUCTIVE INTERFERENCE.
When the rays arrive out of phase a half wavelength the resulting energy is zero, this is the so-called DESTRUCTIVE INTERFERENCE
Answer:
its constructive and destructive
Explanation:
i got it right
What is a key difference between transverse and longitudinal waves?
A.) Transverse move up and down while longitudinal can do in any direction.
B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.
C.) There is no difference, it depends on the scientific uses and calculations involved.
D.) Transverse waves can only represent sound while longitudinal are represented by ocean waves, light and other waves
Answer:
B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.
When that same man hammers harder on the ladder, the waves created will transfer more energy. True or False
Answer:
True
Explanation:
What acceleration can a 1-newton force give to a 1-kilogram object?
Answer: 1 m/s/s
Explanation: One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.
1. Which of the following is NOT true about momentum?
a. It has direction
b. It is conserved in a system
c. It depends on mass and velocity
d. It is the same as the energy of a body
2. Which of the following is TRUE about the impulse acting on a body and it's change in momentum?
a. Impulse is equal to the change in momentum
b. Impulse is greater than the change in momentum
c. Impulse is less than the change in momentum
d. There is no relation between impulse and change in momentum
Answer:
1. answer - it is conserved in a system
2. answe- impulse is equal to the change in momentum
objects through which light can pass are referred to as dash objects
Answer:
Those objects are called transparent objects...
Explanation:
If only some light can pass through them ,it is called translucent....
If no light can pass through them ,it is called opaque.
Answer:
hii good morning
hey i am not good player but i wanted to give a triel to play duo in ff
Which describes Einstein’s second postulate about the special theory of relativity? The speed of light in a vacuum is constant, and nothing is faster than the speed of light. The speed of light in a vacuum is constant, and some things are faster than the speed of light. The speed of light in a vacuum fluctuates, but nothing is faster than the speed of light. The speed of light in a vacuum fluctuates, and some things are faster than the speed of light.
Answer:A
Explanation:
Answer: A)The speed of light in a vacuum is constant, and nothing is faster than the speed of light.
Explanation:
Answered Correctly on Edg.
A football player kicked a ball at an angle of 37o above the horizontal with an initial velocity of 20 m/s, what is the maximum height reached by the ball? a. 62 m b. 26 m c. 7.4 m d. 5.1 m
Answer:
H = 8.45 m
Explanation:
Given that,
Angle of projection, [tex]\theta=37^{\circ}[/tex]
The initial velocity of the ball, u = 20 m/s
We need to find the maximum height reached by the ball. The formula for the maximum height is given by :
[tex]H=\dfrac{u^2\sin^2\theta}{2g}\\\\H=\dfrac{(20)^2\times \sin^2(37)}{2\times 9.8}\\\\H=8.45\ m[/tex]
So, the maximum height reached by the ball is 8.45 m.
Assume that a vaulter is able to carry a vaulting pole while running as fast
as Carl Lewis in his world record 100-m dash (around 12 m/s). Also assume
that all of the vaulter's kinetic energy is transformed into gravitational
potential energy. What vaulting height could that person attain?
(Hint: Use the equation 5 mu? = mgh.)
Answer:
5mu = carry a vaulting pole ( 12 m/s) Also
fast
All the vaulter's kinetic energy is transformed into gravitational potential energy. 7.35m is the that person's height.
What is kinetic energy ?Kinetic energy is the energy that an object has as a result of its movement. If we want to accelerate an object, we must apply force to it. Using force requires us to put in effort. After work is completed, energy is transferred to the object, and the object moves at a new constant speed.
The two most important factors influencing kinetic energy are mass and speed. Because an object's motion is determined by its velocity as well as its mass, though velocity is th
Given:
v = 12m/s
g = 9.8 m/s²
Kinetic energy = potential energy
K.E = P.E
1/2 mv² = mgH
H = v² /2g
H = 7.35m
Thus, 7.35m is the that person's height.
To learn more about the kinetic energy, follow the link;
https://brainly.com/question/15764612
#SPJ2
1
1) If you wanted to save money on your electric bill, all of the following would help except:
OA
using light bulbs that produce more light and less heat
OB.
using a heater that converts more energy into work
O c. lowering the temperature in your hot water
OD. leaving the refrigerator open to increase air circulation
Reset
Next
Answer:
D
Explanation:
I don't know how to explain but D is just weirdly wrong to me.
How do I substitute and solve?
I see how it is 3.2 divide it by 1000 kg ×9.80, but I get confused with the end product.
My question is
[tex]2.4n \div (1000 \frac{kg}{m {}^{3} } ) \times (9.80 \frac{m}{s {}^{2} } )[/tex]
N is Newtons
Will give Brainly for correct answer
Nevermind I'm good now!❤
3.2 N = 3.2 kg•m/s²
and
(1000 kg/m³) (9.80 m/s²) = 9800 kg/(m² s²)
Then
(3.2 N) / ((1000 kg/m³) (9.80 m/s²)) = (3.2 kg•m/s²) / (9800 kg/(m² s²))
… = 3.2/9800 m³
… = 0.00032653… m³
and converting to scientific notation gives
… = 3.2653… × 10⁻⁴ m³
Which change is an example of transforming potential energy to kinetic energy?
changing thermal energy to electrical energy
changing mechanical energy to chemical energy
changing nuclear energy to radiant energy
changing radiant energy to electrical energy
Answer:
changing nuclear energy to radiant energy
Changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.
What is kinetic energy?Kinetic energy is a type of motion energy (i.e., energy in movement), which is used to perform work.
Conversely, potential energy is a type of energy stored in an object, which can be converted to kinetic energy.Nuclear energy is a type of potential energy because this energy is stored in the atomic nucleus.In conclusion, changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.
Learn more about kinetic energy here:
https://brainly.com/question/25959744
A person has a gravitational force (weight) of 600 N on Earth. Suppose the mass of the Earth is double and the radius shrinks to 1/3 of what it currently is. Calculate your new weight.
Explanation:
that's impossible,the radius of the earth can't decrease when the mass doubles!
Calculate the frequency of an electromagnetic wave having a wavelength of 60 m.
Help Please
Answer:
50000
Explanation:
f= speed of light (c) which is a constant number 3×10^6 divided by wavelength
f = 3×10^6/ 60
f = 50000
How much power is needed to lift a 20-kg object to a height of 4.0 m in 2.5 seconds?
Answer:
313.92w
Explanation:
Formula for power:
P=W/∆t = Fv
Givens:
m=20kg
∆y=4.0m
∆t=2.5s
a=9.81m/s²
In order to find power, we first need to solve for work.
W=Fd (force*displacement), f=mg
W=mg∆y
W=(20kg)(9.81m/s²)(4.0m)
W=784.8J
P=W/∆t
P=784.8J/2.5s
P=313.92 watts
If a ball has 100 J of potential energy on the shelf, how much energy does it have if it falls one-fourth of
the way down to the ground?
Answer:
75 J
Explanation:
After collapsing from the shelf. The ball falls one fourth of the distance down. If we calculate 100 - 1/4 ×100= 75 J.
Question 2: What is the velocity ratio of this pulley?
Load
distance=12 m
Effort
distance= 4 m
Answer:
1/3
Explanation:
Velocity ratio = distance moved by effort / distance moved by load
An Aluminium stick of length 1.5 m is cooled from 200 C to -1800 C. Find the final length if its coefficient of linear expansion is 23×10-6/K?
Answer:
1.454 m
Explanation:
From the question,
L₂ = L₁+α(T₂-T₁).................. Equation 1
Where L₂ = Final Length, L₁ = Initial Length, α = Coefficient of Linear expansion, T₁ = Initial Temperature, T₂ = final Temperature.
Given: L₁ = 1.5 m, α = 23×10⁻⁶ K⁻¹, T₁ = 200 °C, T₂ = -1800 °C
Substitute these values into equation 1
L₂ = 1.5+[23×10⁻⁶ ×( -1800-200)
L₂ = 1.5+(23×10⁻⁶×2000)
L₂ = 1.5+(-0.046)
L₂ = 1.5-0.046
L₂= 1.454 m.
What is the gravitational energy of a 2.63kg
book when it is lifted 14.29m off the floor?
Give your answer rounded to one place after the
decimal, no units.
Question 3
Answer:
G.P.E = 368.3
Explanation:
Given the following data;
Mass = 2.63kg
Height, h = 14.29m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
[tex] G.P.E = 2.63*9.8*14.29 [/tex]
G.P.E = 368.3
Note: the unit of gravitational potential energy is Joules.
Water
Glass
A ray of light enters glass at 45° to the horizontal from water. If
the index of refraction of water is 1.3, and index of refraction of
glass is 1.5, then what is the angle of the refracted ray?
Answer: 22
Explanation:
A circuit contains a 20-Ohm resistor and an inductor with an inductance of 0.093 H. If the circuit has a frequency of 60 Hz, what is the total impedance of the circuit?
Answer:
Explanation:
The computation of the total impedance of the circuit is shown below:
The Total impedance of the circuit is
=
where
X_L^2 = 2πfL
= (2π) (60Hz) (0.093 H)
= 35.06 Omega
Now put the value of X_L^2 in the above formula
=
How long did it take the shuttle shock to fall 12 meters