Explanation:
pressure=force/area
force=mass x acceleration
area=length x width
force=M x LT^-2
area=L^2
[tex] \frac{mlt { - }^{2} }{l {}^{2} } [/tex]
=ML^-1T^-2
The rocket that sent us to the moon traveled at 25,000 mi hr convert to miles per second
When water (H2O) freezes into ice, some of the properties have changed. What stays the same?
identity of the H2O
energy of the H2O
arrangement of the H2O
property of the H2O
Answer:
A identity
Explanation:
got it right on edge
Answer:
The identity of the H2O is what stays the same. The singular answer is A. identity of the H2O
Explanation:
I just took the test and made a 100%! I know that you can too bb i love you!! I hope you have a really great day.
.How many electrons are in 0.4 C?
Answer:
There are 2.5 x 10¹⁸ electrons in 0.4 C.
Explanation:
The charge of one electron = 1.602 x 10⁻¹⁹ C
Therefore, the number of electrons in 0.4 C is calculated as follows;
1.602 x 10⁻¹⁹ C -------------> 1 electron
0.4 C --------------------------> x
x = (0.4 ) / (1.602 x 10⁻¹⁹)
x = 2.5 x 10¹⁸ electrons
Therefore, there are 2.5 x 10¹⁸ electrons in 0.4 C.
4
What is the mass of 29.7 moles of chromium atoms? Round your answer to the nearest hundredth. Be sure to include units.
Answer:
The answer is 0.019232211646643. We assume you are converting between moles Chromium and gram. You can view more details on each measurement unit: molecular weight of Chromium or grams The molecular formula for Chromium is Cr. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Chromium, or 51.9961 grams. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between moles Chromium and gram. Type in your own numbers in the form to convert the units!
Answer:
0.019232211646643
Explanation:
please give me brainiest
Day or Night? Which one?
6845 rounded to three significant figures.
While traveling along a highway a driver slows from 48 m/s to 30 m/s in 12 seconds. What is the automobile’s acceleration?
Answer:
-1.5 m/s^2
Explanation:
Acceleration is Final velocity - Initial Velocity/Time (seconds)
30-48= -18
-18/12 = -1.5
-1.5 m/s^2
A cyclist decelerates from 4.6m/s to a stop in .29 minutes. What is the negative acceleration for the cyclist?
Answer:
a = 0.264 [m/s^2]
Explanation:
We can find the deceleration value using the following formula of kinematics:
[tex]v_{f} =v_{o} - (a*t)[/tex]
The final speed is taken as zero as the rider stops completely and the acceleration sign in the equation is taken as negative as the rider is slowing down.
Vf = final velocity = 0
Vo = initial velocity = 4.6 [m/s]
t = time = 0.29 [min] = 0.29*60 = 17.4 [s]
0 = 4.6 - (a*17.4)
-4.6 = - 17.4*a
a = 0.264 [m/s^2]
Question 5 (2 points)
The goal is to increase the power. Therefore, it is necessary to (2 points)
decrease the work being done and decrease the time in which the work was completed
Ob
Ос
decrease the work being done and increase the time in which the work is completed
increase the work being done or decrease the time in which the work is completed
increase the work being done and increase the time in which the work was completed
Answer:
Increase the work being done or decrease the time in which the work is completed
Explanation:
I got it right on the quiz i just took :)
Tim is given a new quantity called Electrical Current. Which of the following questions could Tim ask to determine whether the quantitiy is a vector or a scalar?
O A Who discovered electric current?
O B. What are the base units of electric current?
OC. What is the symbol for electric current?
O D. Does electric current have a direction?
Answer:
B. What are the base units of electric current?
To find out that the electric current is a vector or scalar quantity, Tim should ask what is the symbol for electric current. Hence, option C is correct.
What are vector and scalar quantities?A physical quantity whose size is a complete description of it. Volume, density, speed, energy, mass, and time are a few examples of scalars. Other quantities, like as force and velocity, are referred to as vectors since they have both magnitude and direction.
Real numbers that are typically positive but not always characterize scalars.
In physics, a vector is a quantity with both magnitude and direction. It is often represented by an arrow whose length is proportional to the magnitude of the quantity and whose direction is the same as that of the quantity. A vector does not have position, while having magnitude and direction. In other words, a vector's shape is unaltered if it is shifted parallel to itself as long as its length is unaltered.
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Which of the following is not a vector quantity ?
Answer:
speed
Explanation:
speed is rate of change of distance with time in no specific direction.
What causes an impact crater to form?
Answer:
it is the impact of a meteorite, volcanic activity, or an explosion.
HEY CAN ANYONE HELP ME OUT IN DIS PLS!!!!!!
Explanation:
Energy is involved in changes of state because the energy of particles of matter determines the matter's state.
Changes of state are physical changes in matter.
Energy must be absorbed to change a liquid to a gas.
Sublimation is solid to gas (no liquid involved).
1 D
2 False
3 True
4 D
why doesnt food have energy
Oh it has ! It has ! That's exactly where you get all the energy you use to think, breathe, and move.
HELP ANSWER QUESTION 1
1.Explain frame of reference. How is it different when you are riding inside a car or standing by the highway?
2. Explain Newton’s three laws of motion.
3. When riding in a car that suddenly stops, how is it different when you are wearing a seatbelt or not? Explain how Newton’s laws apply.
4. Define force.
5. Explain balanced and unbalanced force.
6. Describe the four fundamental forces? Arrange them from weakest to strongest.
7. What is work and power and their relationship?
Answer:
See explanation
Explanation:
A frame of reference simply refers to a set of coordinates which is used to determine the position and velocity of objects all the objects found in that particular frame. The person inside the car and standing by the highway are in different frames of reference.
Newtons first law of motion states that an object will continue to be at rest or in a state of uniform velocity until it is acted upon by an external force.
Newtons second law states that rate of change of momentum is directly proportional to the impressed force.
Newtons third law states that action and reaction are equal and opposite.
The action of applying brakes leads to an equal reaction of a sudden forward movement. Seat belts help to prevent the occupants of a car from being injured by the sudden stoppage of the car.
Force is simply defined as a push or pull.
Balanced forces do not lead to acceleration of a body but an unbalanced for leads to acceleration of a body.
strong nuclear force, electromagnetic force, weak nuclear force and gravity
Power is the rate of doing work while week is said to be done when the force applied moves a distance in the direction of the force. Power is defined as work/time.
A car engine uses the combustion of fuel to move a system of gears that
move its wheels. Not all of the fuel's energy is transferred to the wheels,
Which two options describe what happens to the rest of the energy?
O A. Some energy is lost because it is transformed into chemical
energy
B. Some energy is lost because it is transformed into potential
energy
C. Some energy is lost because of the friction between the gears.
D D. Some energy is lost because it is transformed into thermal
energy
O E. Some energy is lost because it is absorbed by the driver
Answer: C and D
Explanation: I just took took the test
Answer:
The correct answers are C and D.
Explanation:
The friction of the car's moving parts rubbing up against each other and the thermal energy created by the combustion of the car's fuel both create heat that will take away from the energy from the fuel that is transferred to the car's wheels.
In short, some of the energy was not transferred to the wheels because the gears and the combustion create heat.
What kind of charging is occurring in the first part of the video (when the
towel and container are rubbed together)? *
where does most of earths available carbon come from
A bullet is fired horizontally from a 17.7 m high cliff at a speed of 482.0. What is the distance from the cliff that the bullet will hit the ground below?
Please be sure to round to 1 decimal place. NUMBERS ONLY no units.
Answer:
Horizontal distance=?m
Explanation:
Horizontal velocity,u=482ms⁻¹
Height of the cliff=17.7m
Horizontal distance,R=?
R=v×√2h/g
why does it take mars over 500 days to orbit the sun?
Answer:
Mar's orbital path is more than that of Earth, thus it takes more number of days to orbit around the sun.
Explanation:
Mars takes over 500 days to orbit all the way around the sun than Earth because its distance from the sun (228 million kilometers) is greater than that of Earth (150 million kilometers) which takes it 365 days.
Planets that orbit closer to the sun take shorter time to orbit around the sun because the cover a shorter orbital distance and orbit faster than those planets further from the sun.
For example
Using Earth's distance from the sun, 150 million kilometers and the number of days taken to orbits the sun ,365 days and the distance Mars is from the Earth, 228 million kilometers, you can approximate the time Mar takes to orbit the sun as:
Earth 150 million kilometers = 365 days
Mars 228 million kilometers= ?
Cross product ; (228 *365) /150 =555 -----(a value closer to that in the question)
what is seismograph
Answer:
[tex] \boxed{ \sf{See \: below}}[/tex]
Explanation:
Seismograph is a computerized instrument that measures the intensity , origin and speed of the earthquake.
Hope I helped!
Best regards! :D
~[tex] \sf{TheAnimeGirl}[/tex]
What does EMR tell us about wavelength, amplitude, and frequency?
Answer:
Amplitude is one-half the height of the wave from peak to trough. Wavelength and frequency are inversely proportional: As the wavelength increases, the frequency decreases.
I hope this helps in a way...
If the unbalanced force is -20.0 N and the mass of the object is 3.75 kg, what is the acceleration of the the object while this force is acting?
Answer:
a=-5.3m/s2
Explanation:
F=-20N
m=3.75kg
a=?
F=am /:m
a=F/m
a=-20N/3.75kg
a=-5.3m/s2
Convert 83 F to Kelvin
Explanation:
Formula:
F*255.92778=K
83 F *255.92778=301.48k
therefore the answer is:
301.48K
One particle has a charge of 2.15 x 10^ -9 while another particle has a charge of 3.22 x 10^ -9 If the two particles are separated by 0.015 m, what is the electromagnetic force between them? A. 4.31 x 10^ -7 N B. 2.77 x 10^ -4 N C. 4.15 x 10^ -6 N D. 6.22 x 10^ -4 N
Answer:
B. 2.77 x [tex]10^{-4}[/tex] N
Explanation:
The required force can be calculated by:
F = [tex]\frac{Kq_{1}q_{2} }{d^{2} }[/tex]
Where F is the force between the particles, K is the coulomb's constant (9 x [tex]10^{9}[/tex] [tex]Nm^{2}/C^{2}[/tex]), [tex]q_{1}[/tex] is the charge on the first particle, [tex]q_{2}[/tex] is the charge on the second particle and [tex]d^{2}[/tex] is the distance between the particles.
So that:
F = [tex]\frac{9*10^{9}*2.15*10^{-9} *3.22*10^{-9} }{(0.015)^{2} }[/tex]
= [tex]\frac{6.2307*10^{-8} }{(2.25*10^{-4} }[/tex]
= 2.7692 x [tex]10^{-4}[/tex]
The force between the particles is 2.77 x [tex]10^{-4}[/tex] N.
Answer:
b
Explanation:
a pex
simplify the equation
✓52-✓117+4✓13
✓52 - ✓117 + 4✓13 =
✓4×13 - ✓9×13 + 4✓13 =
2✓13 - 3✓13 + 4✓13 =
-✓13 + 4✓13 = 3✓13
Answer = 3✓13
If you have any questions about my answer, ask me.
Answer:
I hope that,it help you.
People playing a basketball game in a gymnasium make up a close system with 17,125 J of energy. At the beginning of the game the system has 16,250 J of mechanical energy, and at the end it has 1135 J of mechanical energy. How much of the total energy is transformed into thermal energy during the game
Answer: 15,115 J
Explanation: --APEX-- JUST TOOK THE TEST
Answer:
15,115 J
Explanation:
The mass of a fully loaded Boeing 747 is abput 4,082,331.33 kg. If it is cruising eastward at a velocity of 253 m/s, what is its momentum?
Answer:
1,032,829,826.49kgm/sExplanation:
Momentum is defines as the product of mas of a body and its velocity,
Given
Mass of Being 747 =
Velocity = 253m/s
Required
Momentum of the body
Substituting the required value into the formula;
Momentum = 4,082,331.33 kg * 253
Momentum = 1,032,829,826.49 kgm/s
Therefore the momentum of the body is 1,032,829,826.49kgm/s
The momentum of fully loaded Boeing 747 is [tex]1.032 \times 10^{9} \;\rm kg.m/s[/tex].
Given data:
The mass of fully loaded Boeing 747 is, m = 4,082,331.33 kg.
The velocity of cruising is, v = 253 m/s.
The concept of momentum says that the impact created by the applied force is known as momentum. It is expressed as product of mass and velocity.
Then the expression is,
p = mv
Soling as,
[tex]p = 4,082,331.33 \times 253\\\\p=1.032 \times 10^{9} \;\rm kg.m/s[/tex]
Thus, we can conclude that the momentum of fully loaded Boeing 747 is [tex]1.032 \times 10^{9} \;\rm kg.m/s[/tex].
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3. A Japanese bullet train slows from a speed of 50 m/sec to a speed of 40 m/sec in 500m.
What is its acceleration?
Answer:
-0.9 m/s²
Explanation:
Given:
Δx = 500 m
v₀ = 50 m/s
v = 40 m/s
Find: a
v² = v₀² + 2aΔx
(40 m/s)² = (50 m/s)² + 2a (500 m)
a = -0.9 m/s²
A bullet train moves with an initial velocity of 50 m/s final velocities of 40 m/s, and it covers 500 meters, so the acceleration will be -0.9 m/s².
What is acceleration?Acceleration is the term that describes the pace at which the speed and direction of a motion change over time. Anything moving faster or slower inside a straight line is said to be accelerating. Even if the speed is constant, travel on a circle accelerates also because the direction of motion is always changing.
From the given information in the question,
Initial velocity, u = 50 m/s
Final velocity, v = 40 m/s and,
Distance, s = 500 meters
Use equation of motion to find the acceleration of the train :
v² - u² = 2as
(40)² - (50)² = 2(a)(500)
a = -900/1000
a = -0.9 m/s².
Therefore, the acceleration of the bullet train is -0.9 m/s².
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