Answer:
Pluto is no longer considered a planet as a result of it's small size on the IAU scale.
Explanation:
An ice skater is gliding horizontally across the ice with an initial velocity of 7.56 m/s. The coefficient of kinetic friction between the ice and the skate blades is 0.0695, and air resistance is negligible. How much time elapses before her velocity is reduced to 2.32 m/s
Answer: 7.723s
Explanation:
given data:
initial velocity = 7.56 m/s.
friction = 0.0695.
change in velocity = 2.32 m/s
Solution:
[tex]ax = \frac{-Fk}{m}[/tex]
[tex]ax = \frac{-ukFN}{m}[/tex]
[tex]ax = \frac{-ukmg}{m}[/tex]
[tex]ax = -ukg[/tex]
[tex]recall = v0x +axt[/tex][tex].......eqn1[/tex]
[tex]t = \frac{vx - v0x}{ax}[/tex] [tex]........eqn2[/tex]
[tex]substitute[/tex] [tex]ax[/tex] [tex]into[/tex] [tex]eqn 2[/tex]
[tex]t = \frac{vx -v0x}{-ukg}[/tex]
[tex]t = \frac{2.32m/s - 7.56m/s}{-(0.0695)(9.80m/s^{2})}[/tex]
[tex]t= 7.723seconds[/tex]
What has happened to the block of material next to the magnet?
A. The entire block next to the magnet has been magnetized.
B. The end of the block farthest from the magnet has been
magnetized.
C. The end of the block closest to the magnet has been magnetized.
D. The middle of the block next to the magnet has been magnetized.
The end of the block closest to the magnet has been magnetized. this happened to the block of material next to the magnet. Hence option C is correct.
A magnetic field creates a magnetic moment inside ferromagnetic materials like iron when it interacts with the substance. The magnetic moment lines up with the magnetic field outside.
The end of the material block closest to the magnet will encounter the greatest magnetic field and become magnetised in this situation since the magnet is placed near to the material block.
The farthest end of the block would have the smallest magnetic impact since the magnetization diminishes as you get farther from the magnet.
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a plane is traveling at a velocity of 50 m/s. it accelerates at a constant rate of 0.5 m/s until it's velocity reaches 65 m/s. what distance did the plane cover while it was accelerating?
Answer:
Displacement = 1725m
Explanation:
[tex]t = \frac{u-v}{a}[/tex]
[tex]t = \frac{65-50}{0.5} = 30s[/tex]
[tex]s = ut+\frac{1}{2}at^{2} \\s = 50*30 + \frac{1}{2} *0.5*30^{2} = 1725m[/tex]
Pick the correct word to fill up the blank in below question: velocity, combustion, acceleration, gravitation, force
If a race car wants to change its velocity then a net force is
required to cause the necessary
Answer: Acceleration
An athlete wants to test her physical endurance while completing an activity. Which statement best describes endurance?
Answer:
how long the athlete can sustain the activity
Explanation:
"Endurance" tests your body's ability to carry on a specific activity for a particular period of time. This is often confused with "stamina," which tests the body's ability to do a specific activity without getting exhausted.
An example of an endurance training for the muscles is by doing 5 sets of body weight squats with repetitions, let's say 25. Depending on one's endurance, the repetition may be increased. Another example is by doing 5 sets of lunges with 15 repetitions on each leg (a total of 30 repetitions).
gas to liquid pls fast answer
Answer:
wet farts, JK its condensation.
with the help of the given diagram calculate the current through each resistor.
Answer:
2 and 0.6 ohms = 1.8A
4ohms = 1.08A
6 ohms = 0.72 ohms
Explanation:
With the help of the given diagram calculate the current through each resistor.
According to ohms law
E = IRt
E is the electromotive force = 9V
I is the total current in the circuit
Rt is the total equivalent resistance
Get Rt
1/R = (1/4+1/6) (parallel resistors)
1/R = 3+2/12
1/R = 5/12
R = 12/5
R = 2.4 ohms
Rt = 2 + 0.6 + 2.4
Rt = 5 ohms
Get the total current
I = E/Rt
I = 9/5
I = 1.8A
Since same current flows in a series connected resistors
Current in the 2 and 0.6 ohms resistors will be 1.8A
For the 4 and 6 ohms resistor:
Voltage across them is expressed as:
V = IR
V = 1.8(2.4)
V = 4.32Volts
The current in 4 ohms resistor
I = 4.32/4
I = 1.08A
The current in 6 ohms resistor
I = 4.32/6
I = 0.72A
I'll give brainliest!! Please help asap!!!
Explain how scientist learned about the magnetic poles of the Earth.
What object has the most inertia? (THE CHOICES ARE IN THE PICTURE WILL GIVE BRAINLIST PLEASE HURRY)
List the three types of speed
FAST
MEDium
slow
.....
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. (1 point)
Which best explains the reaction?
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Answer:
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Explanation:
mass and volume are the same thing and has to be the last one.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
What is chemical reaction?Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.
Chemical reactions never result in the loss or gain of mass. This is due to the fact that chemical reactions do neither produce or consume any atoms.
The reaction of Hydrochloric acid and sodium hydroxide carried out in a typical laboratory setting, matter is neither generated nor destroyed, nor are any elements changed into others. The total mass of the reactants ( NaOH and HCl) and the total mass of the products (NaCl and H₂O) are equal since matter is neither generated nor destroyed during a chemical reaction.
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Which of the following are true about electric motors?
An armature spins to create kinetic energy.
A horseshoe magnet drives the spin of the armature.
The direction of the current is changing direction over and over.
All of these are correct.
The true statements about electric motion are:
An armature spins to create kinetic energy.A horseshoe magnet drives the spin of the armature.The direction of the current is changing direction over and over.What is electric motor?An electrical device that transforms electrical energy into mechanical energy is an electric motor. The majority of electric motors work by creating force in the form of torque imparted to the motor shaft through the interplay of the magnetic field of the motor and electric current in a wire winding.
Electric generators function with a reversed power flow, transforming mechanical energy into electrical energy, and are mechanically identical to electric motors.
Electric motors can be powered by alternating current (AC) sources like a power grid, inverters, or electrical generators or by direct current (DC) sources like batteries or rectifiers.
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A circuit constructed on a circuit board is shown below.
Which of the following schematic circuits correctly represents the circuit shown?
Answer:
see attached
Explanation:
The drawing shows a battery connected to two lamps in series. There is no switch in the circuit. The schematic below reflects this.
Which processes most contribute to soil formation? plz do it all i will give brailest and thanks to best answer
SPEED THAT
INCLUDES THE
DIRECTION is ____
Answer:
Velocity
Explanation:
The ______________ is a very strong north westerly air current encircling the Earth causing the cold fronts to come down into the United States during the winter. *
10 points
sea breeze
land breeze
climate
weather
ocean current
conduction
Gulf Stream
Jet Stream
hurricane
wind*
Answer: it's wind
Explanation:
Micah knows that a car had a change in velocity of 15 m/s. What does Micah need to determine acceleration.
distance
time
direction
speed
Answer:
the answer is TIME
Explanation:
This question involves the concepts of acceleration, time, and velocity.
Micah needs "time" to determine acceleration.
Acceleration is defined as the rate of change of velocity. Mathematically,
[tex]a=\frac{\Delta v}{t}[/tex]
where,
a = acceleration
Δv = change in velocity
t = time interval
Since Micah knows the change in velocity. Therefore, the only thing she needs to know the acceleration is time.
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You will need the following items: a rope about 10 to 20 meters long, a meter or yard stick, a watch that records seconds, and a helper. Tie one end of the rope to a doorknob or other secure object at about waist height. Have your helper take one end of the rope and whip it up and down, while you watch. Answer the questions below.
What type of wave was created? How do you know?
Estimate the wavelength of the wave produced.
Estimate the frequency of the wave produced. This is most easily estimated by counting the number of waves that pass the measuring device within a particular time interval as measured on your watch, or by counting the number of times the hand is shaken up and down.
Compute the velocity of your wave.
Answer:
1. The wave created is a transversal wave because the medium goes up and down. (I used what someone put in the comments because it's correct.)
2. 20 Meters
3. 60 Hz (Hertz)
4. 1200m/s
Explanation:
Not sure if all of this is correct, but I did this assignment so..
Please mark me brainliest. I answered all questions.
if a 78.2 kg kangaroo weighs 6742 N on the planet katar, calculate katar's radius
Answer:
about 7500 km
Explanation:
The mass of planet Katar is 7.27×10^25 kg. The force on the kangaroo is given by ...
F = GmM/r^2
Solving for r, we have ...
r = √(GmM/F) = √(6.67×10^-11 × 78.2 × 7.27×10^25 / 6742) ≈ √(5.62×10^13)
This is in meters, so the radius in km is about ...
r ≈ 7500 km
what is the definition of force According to netwon's first law of motion
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A.
If a car moves with a uniform speed of 2m/s in a circle of radius 0.4m, what is its angular speed?
Answer:
The car's angular speed is [tex] \frac{rad}{s}[/tex].
Explanation:
Angular velocity is usually measured with [tex]\frac{radians}{sec}[/tex], so I'm going to use that to answer your question.
The relationship between tangential velocity and angular velocity (ω) is given by:
[tex]V = \omega R[/tex]
Using the values from the question, we get:
[tex]2 \frac{m}{s} = \omega (0.4m)[/tex]
[tex]\omega = 5 \frac{rad}{s}[/tex]
Therefore, the car's angular speed is [tex]5 \frac{rad}{s}[/tex].
Hope this helped!
SOMEONE PLSSSS HELP ME WITH THIS QUESTION!!
The ionization energy of an atom is the energy required to remove an electron from the atom. In the Bohr model, the ionization energy equals the energy difference between the lowest energy level n = 1 , in which the electron is closest to the nucleus, and the energy level n = [infinity] , which has an infinite radius.
The question is incomplete, the complete question is;
The ionization energy of an atom is the energy required to remove an electron from the atom. In the Bohr model, the ionization energy equals the energy difference between the lowest energy level n = 1 , In which the electron is closest to the nucleus, and the energy level n oo, which has an infinite radius. Compared to the ionization energy of hydrogen, the energy required to remove the electron from singly ionized helium is O two times greater. O four times greater. eight times greater. O one-half as great. O one-fourth as great.
Answer:
four times greater
Explanation:
For a hydrogen atom, an ionization energy of 13.6 electron volts is required to eject its single electron from the lowest energy level all the way out of the atom.
The helium ground state contains only two 1s electrons. When one of these is removed, He^+ looks quite similar to H^+.
The energy required to remove the remaining helium electron should be; 4×(13.6eV)=54.4eV since the energy depends on the square of the nuclear charge.
16. For this table of data, how should the y-axis be labeled (with units)?
mass (kg)
3.2
4.6
6.1
6.2
7.4
9.
10.4
10.9
newtons (m/s)
31.381
45.1 111
59.821
60.801
72.569
89.241
101.989
106.892
Oms'
mass (kg)
O newtons
O kg
mass
O newtons (m/s?)
Answer:
The y-axis should be labelled as W in Newtons (kg·m/s²)
Explanation:
The given data is presented here as follows;
Mass (kg) [tex]{}[/tex] Newtons (kg·m/s²)
3.2 [tex]{}[/tex] 31.381
4.6 [tex]{}[/tex] 45.1111
6.1 [tex]{}[/tex] 59.821
7.4 [tex]{}[/tex] 72.569
9 [tex]{}[/tex] 89.241
10.4 [tex]{}[/tex] 101.989
10.9 [tex]{}[/tex] 106.892
From the table, it can be seen that there is a nearly linear relationship between the amount of Newtons and the mass, as the slope of the data has a relatively constant slope
Therefore, the data can be said to be a function of Weight in Newtons to the mass in kilograms such that the weight depends on the mass as follows;
W(m) in Newtons = Mass, m in kg × g
Where;
g is the constant of proportionality
Therefore, the y-axis component which is the dependent variable is the function, W(m) = Weight of the body while the x-axis component which is the independent variable is the mass. m
The graph of the data is created with Microsoft Excel give the slope which is the constant of proportionality, g = 9.8379, which is the acceleration due to gravity g ≈ 9.8 m/s²
We therefore label the y-axis as W in Newtons (kg·m/s²)
What is the approximate force the Earth would exert on a 15 kilogram object?
plss i need asap!!!
Answer:
The approximate mass of the object is. 1. 0.01 kg.
Explanation:
between the magnitude of the gravitational force exerted on Earth by the ... A 60-kg physics student would weigh 1560 N on the surface of planet X.
How do the units of work and power compare?
a) The unit for work is a watt. The unit for power is a joule, which is a watt-second. b)The unit for work is a watt. The unit for power is a joule, which is a watt per second. c)The unit for work is a joule. The unit for power is a watt, which is a joule-second.
d)The unit for work is a joule. The unit for power is a watt, which is a joule per second.
Answer:
Option (d) is correct.
Explanation:
Work done is given by :
W = Fd, where F is force and d is displacement
Unit of work done :
The SI unit of force is Newton (N) and that of displacement is meter (m). So, the unit of work done is N-m. It is call Joule. It means that the unit of work done is Joule.
Power is given by rate at which the work is done. It is given by :
P = W/t, W is work done and t is time
Unit of power:
Unit of work is Joule (J) and that of time is second (s). It means that the unit of power is Watt and it is equal to Joule/second
Hence, the correct option is (d) "The unit for work is a joule. The unit for power is a watt, which is a joule per second".
Answer: The unit for work is a joule. The unit for power is a watt, which is a joule per second.
Explanation:
BRAINLY HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The answer is B.) Motion.
- Chilio
If I drive 60 km/h and it takes me 3000 s to get to work, how far is my work
from my house? *
Answer:
Explanation: CONVERT km/h TO m/s
WE GET 16.67 M/S
THEN,
USE : speed= distance / time
16.67 = x / 3000
∴x = 50,000 m
or
∴x = 50 km
During an adiabatic process in a closed system, what happens to a gas when the gas expands?
It's temperature increases
It’s temperature decreases
It’s molecules gain mass
It’s molecules lose mass
Answer:
the answer is B. the temperature decreases
Explanation:
I got it right.
The process in which the net heat transfer is equal to zero is known as the adiabatic process. During an adiabatic process in a closed system when the gas expands its temperature decreases.
What is an adiabatic process?An adiabatic process is a thermodynamic process in which there is no heat transfer between the system and surroundings. Hence the net heat transfer is equal to zero.
It is given by ΔQ=0.
The temperature in a closed system occurs due to the movement or collision of atoms in the system. As the gas expands the atoms have enough space due to which collision decreases.
Hence during an adiabatic process in a closed system when the gas expands its temperature decreases.
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Converging lenses are _____ at the center and _____ at the edges. a. thickest, thinnest b. thinnest, thickest
Answer:
Converging lenses are thickest at the center and thinnest at the edges.
Explanation:
Lenses are transparent medium that refracts all incident light. Converging lens is one of the type of lens that we have and they are also known as convex lenses. Converging lenses are formed from the combination of two convex mirror. They are thickest at the center and thinnest at the edges. All incident light on a convex lens converges after refraction
