Answer:
air is the answer your WC be safe
A car's engine provides a driving force of 30N. The car travels at a steady speed of 20m/s. What is the size of the resistive force acting against the driving force?
Answer:
30 N
Explanation:
Since the car travels at a steady speed of 20m/s and has a driving force of 30N, there is no net acceleration and thus, the resistive force is also 30 N in magnitude but in the opposite direction to the driving force. This is shown below.
F - f = f' where F = driving force = 30 N. f = resistive force and f'= net force.
f' = 0 since there is no acceleration. So,
F - f = 0
F = f = 30 N
The right answer is "30 N"
Answer explanation:
If a car is travelling at a steady speed, the resultant force must be zero, so the driving force and resistive force must be equal and opposite.
Hope it helps
Which statement BEST describes the relationship between our Solar System and the Milky Way galaxy?
A)Our Solar System is located in the center of the Milky Way galaxy.
B)The Milky Way galaxy is located in the center of our Solar System.
C)The Milky Way galaxy is located in the outer area of one of the orbits in our Solar System.
D)Our Solar System is located in the outer area of one of the spiral arms of the Milky Way galaxy.
Answer:
D)Our Solar System is located in the outer area of one of the spiral arms of the Milky Way galaxy.
Explanation:
Our solar system is one of millions of solar systems found in our galaxy, the Milky Way.
Hope that helps!
Have a great day! :D
The relationship between our Solar System and the Milky Way galaxy is option d. Our Solar System is located in the outer area.
Relationship between our Solar System and the Milky Way galaxy:The earth orbited the sun, so the solar system that orbited the center of the milky way.
Also, it does have solar system nearest to the 250 million for finishing the single revolution.
Hence, the option d is correct.
Learn more about solar here: https://brainly.com/question/12004410
Select the correct answer. How many sets make up a game in volleyball? ОА. Two OB. Three or Five Ос. Four or Six OD One
5 sets
Explanation:
Matches are played best of five sets. The first four sets are played to 25 points, with the final set being played to 15 points. A team must win a set by two points. There is no ceiling, so a set continues until one of the teams gains a two-point advantage. Previously, all sets were to 15 points, with the first four sets having a ceiling of 17 and the final set requiring at least a two-point winning advantage.
can someone answer these two questions? thanks
Carol tries to push a bookshelf across the room. As much as she tries, she can not get the bookshelf to move. Which statement best describes why the
bookshelf is not moving?
O
A Carol did not apply enough force to the bookshelf and so the forces are unbalanced.
B. Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
0
C. Carol applied too much force to the bookshelf and now the forces on the bookshelf are balanced
D. Carol applied too much force to the bookshelf and now the forces on the bookshelf are unbalanced
Answer:
B.
Explanation:
Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
Hope this helps!! :)
1.) What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 grams in 21.6 seconds?
Answer:
There the first one
Explanation:
A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?
A. 1 000 J
B. 200 J
C. 2 000 J
D. Cannot be determined
Answer:
[tex]\boxed {\boxed {\sf A. \ 1000 \ Joules}}[/tex]
Explanation:
Kinetic energy can be found using the following formula.
[tex]E_k=\frac{1}{2}mv^2[/tex]
where m is the mass and v is the velocity.
The mass of the toy plane is 20 kilograms and the velocity is 10 meters per second.
[tex]m= 20 \ kg \\v= 10 \ m/s \\[/tex]
Substitute the values into the formula.
[tex]E_k=\frac{1}{2}(20 \ kg) (10 \ m/s)^2[/tex]
Solve the exponent first.
(10 m/s)²= 10 m/s *10 m/s= 100 m²/s²[tex]E_k=\frac{1}{2} (20 \ kg) (100 \ m^2/s^2)[/tex]
Multiply the last two numbers together.
[tex]E_k= \frac{1}{2}(2000 \ kg*m^2/s^2)[/tex]
Multiply by 1/2 or divide by 2.
[tex]E_k= 1000 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second is equal to 1 Joule. Our answer of 1000 kg*m²/s² is equal to 1000 Joules[tex]E_k= 1000 \ J[/tex]
The kinetic energy of the toy plane is 1000 Joules
a truck is moving at a constant speed of 46m/s. What is its acceleration?
Answer:
the distance from point C to D is 7.75m
Explanation:
Which item has the most thermal energy?
Answer:
A
Explanation: The hotter things get the more thermal energy they have
Also don't ever take pictures like this again
Answer:A
Explanation:
1 kg of boiling water is hot enough to melt a block of ice more quickly
The specific heat capacity of water is 4.184 J/(g·ºC). How much thermal energy is required to change the temperature of 700.0 g of water from 25.6ºC to 75.4ºC?
Answer:
145854.24J
Explanation:
Given parameters:
Specific heat capacity of water = 4.184J/g°C
Mass of the water = 700g
Initial temperature = 25.6°C
Final temperature = 75.4°C
Unknown:
Thermal energy = ?
Solution:
To solve this problem, we use the expression below;
H = m x c x Ф
H is quantity of heat
m is the mass
c is the specific heat capacity
Ф is the temperature change
H = 700 x 4.184 x (75.4 - 25.6) = 145854.24J
Describe reflection using the terms incident ray and reflected ray.
10 points fast
10 POINTS ASAP
Answer:
The normal line divides the angle between the incident ray and the reflected ray into two equal angles. ... The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection
The law of reflection is the idea that when light rays strike a smooth surface, the angle of incidence and the angle of reflection are both identical. Additionally, the incident ray, the reflected ray, and the surface normal all reside in the same plane.
What is reflection?Reflection of light refers to the act of light rays hitting a surface and reflecting back.
According to the law of reflection, the angle of the reflected ray, when reflecting from a smooth surface, is equal to the angle of the incident ray, with regard to the surface's normal, which is a line perpendicular to the surface at the point of contact.At the point of contact of the incident ray, the reflected ray is always in the plane defined by the incident ray and the normal to the surface.The law of reflection explains how both curved and planar mirrors form images.
Learn more about reflection here:
https://brainly.com/question/28969632
#SPJ2
which of the following experiments with best fall under the field of optics
a. examining her playing different sounds can make an object vibrate
b. determining how fast and object will move when different forces are applied
c. measuring how light reflects off of mirrors made from different materials
d. finding how quickly a material melts under different temperature conditions
Answer:
a
Explanation:
because your trying to decide
The measuring of how light reflects off of mirrors made from different materials falls under the field of optics. Therefore, option (C) is correct.
What is optics?Optics can be described as the branch of physics that studies the behavior, and properties of light and its interactions with matter and the construction of instruments that detect it. Optics can be described as the behavior of visible, ultraviolet, and infrared light because the light is electromagnetic radiation such as X-rays, microwaves, and radio waves exhibit similar properties.
The most general is geometric optics which treats light as a collection of rays that travel in straight lines and bend as they pass through or reflect from surfaces.
Physical optics can be described as a more comprehensive model of light, which involves wave effects such as interference and diffraction and that cannot be considered in geometric optics.
Learn more about optics, here:
https://brainly.com/question/14703021
#SPJ2
how can being near a large body of water affect the climate of the region?
Answer:
yes
Explanation:
If you've ever heard of lake effect snow that is when cold air mass moves across long expanses of warmer lake water. The lower layer of air, heated up by the lake water, picks up water vapor from the lake and rises up through the colder air above; the vapor then freezes and is deposited on the leeward (downwind) shore. this is most common with lake Michigan when cold air travels down from Canada making the neighboring states colder, so YES, being near any body of water can effect the climate.
I hope this helps
Answer:
Explanation:
Hurricane winds whip up large
waves in the ocean. These waves cause
a bulge of water in the ocean known
as a storm surge (stawrm surj). As
a storm moves over a coast, the
storm surge can cause water levels to
suddenly rise, or surge, several meters.
The main dangers in a hurricane
are flying objects, strong winds, and
flooding. If possible, leave areas
threatened by a hurricane. Take
prescription medicines with you.
If you stay in a building, board up
windows and stay away from windows
and doors. Store food, bottled water,
flashlights, and battery operated
radios. Stay away from beaches
and areas that may become flooded
Pls help will mark brainliest
Answer: The pattern of the battery is wrong, the bulb is broken , the wires of the circuit is broken , the switch is not closed .
Answer:
circle the open switch on the right (it is open so the circuit is broken), the break in the wire on the left, opposite the switch (wire is broken so the circuit cannot continue) and on the left side of the bulb (bulb isn't fully connected so the circuit cannot continue). i think this is correct but my explanations may be a bit off, so just see where this takes you. hope it helps.
An aquarium has a volume of 2.75 cubic
meters. How many liters of water can the
aquarium hold?
Why VR of second class lever is greater than 1?
Second class lever has mechanical advantage always more than one as load is in between fulcrum and effort making the effort arm longer than the load arm. It multiplies force. ... It does not multiply force but changes the direction of force.
what is a similarity between air pressure and temperature in the troposphere
Answer:
The temperatures
Explanation:
Heat rises
an object is dropped from the top of a building which is 75 meters high. what's it's velocity before it reaches ground
Hi there! :)
[tex]\large\boxed{38.34 m/s}[/tex]
Use the following kinematic equation to solve:
[tex]v_{f}^{2} = v_{i}^{2} + 2ad[/tex]
Where:
vf = final velocity (?)
vi = initial velocity (0 m/s, object started at rest)
a = acceleration (gravity = 9.8 m/s)
d = distance travelled (75 m)
Plug in the given values into the equation:
[tex]v_{f}^{2} = 0^{2} + 2(9.8)(75)[/tex]
Simplify:
[tex]v_{f}^{2} = 2(9.8)(75)\\\\v_{f}^{2} = 1470[/tex]
Take the square root of both sides:
[tex]v_{f} = \sqrt{1470} = 38.34 m/s[/tex]
List the benefits of studying rocks and fossils?
11. How much work is required to increase the kinetic energy of an object from 600 J to 1800
J?
a) 1200 J
b) 2400 J
c) 3 J
what is 1=1?????????????????????????????//// HELP
Answer:
I am pretty sure that it is one
Answer:
Explanation: is 1
A train car of mass 16,500 kg moves along the railroad track with a constant speed of 14 m/s. What is the momentum of the car?
Answer:
231000kgm/s
Explanation:
Given parameters:
Mass of train car = 16500kg
Constant speed = 14m/s
Unknown:
Momentum of the car = ?
Solution:
To solve this problem, we must understand that the momentum of a body is the quantity of motion a body possess.
So;
Momentum = mass x velocity
Momentum = 16500 x 14 = 231000kgm/s
A merry-go-round with a rotational inertia of 600 kg m2 and a radius of 3.0 m is initially at rest. A 20 kg boy approaches the merry-go-round along a path tangent to the rim of the at a speed of 5.0 m/s. Determine the angular velocity of the system after the boy hops on the merry-go-round.
Answer:
The velocity of the merry-go-round after the boy hops on the merry-go-round is 1.5 m/s
Explanation:
The rotational inertia of the merry-go-round = 600 kg·m²
The radius of the merry-go-round = 3.0 m
The mass of the boy = 20 kg
The speed with which the boy approaches the merry-go-round = 5.0 m/s
[tex]F_T \cdot r = I \cdot \alpha = m \cdot r^2 \cdot \alpha[/tex]
Where;
[tex]F_T[/tex] = The tangential force
I = The rotational inertia
m = The mass
α = The angular acceleration
r = The radius of the merry-go-round
For the merry go round, we have;
[tex]I_m \cdot \alpha_m = I_m \cdot \dfrac{v_m}{r \cdot t}[/tex]
[tex]I_m[/tex] = The rotational inertia of the merry-go-round
[tex]\alpha _m[/tex] = The angular acceleration of the merry-go-round
[tex]v _m[/tex] = The linear velocity of the merry-go-round
t = The time of motion
For the boy, we have;
[tex]I_b \cdot \alpha_b = m_b \cdot r^2 \cdot \dfrac{v_b}{r \cdot t}[/tex]
Where;
[tex]I_b[/tex] = The rotational inertia of the boy
[tex]\alpha _b[/tex] = The angular acceleration of the boy
[tex]v _b[/tex] = The linear velocity of the boy
t = The time of motion
When the boy jumps on the merry-go-round, we have;
[tex]I_m \cdot \dfrac{v_m}{r \cdot t} = m_b \cdot r^2 \cdot \dfrac{v_b}{r \cdot t}[/tex]
Which gives;
[tex]v_m = \dfrac{m_b \cdot r^2 \cdot \dfrac{v_b}{r \cdot t} \cdot r \cdot t}{I_m} = \dfrac{m_b \cdot r^2 \cdot v_b}{I_m}[/tex]
From which we have;
[tex]v_m = \dfrac{20 \times 3^2 \times 5}{600} = 1.5[/tex]
The velocity of the merry-go-round, [tex]v_m[/tex], after the boy hops on the merry-go-round = 1.5 m/s.
The number of calories consumed must equal the number of calories burned.
A. true
B. false
Answer:
I think that is true not sure
A cannonball is fired from ground level at an angle of 60.0 ° above horizontal at a speed of 72.5 m/s. What is the horizontal component of the velocity at the time of launch?
Answer:
A cannon ball is fired with an initial velocity of 100.0 m/s at an angle ... resolve the initial velocity into its vertical and horizontal components. ... Yet another way would be to calculate the time it takes for the object
Explanation:
what is precipitation reactions
α prєcípítαtíσn rєαctíσn rєfєrs tσ thє fσrmαtíσn σf αn ínsσluвlє sαlt whєn twσ sσlutíσns cσntαíníng sσluвlє sαlts αrє cσmвínєd. thє ínsσluвlє sαlt thαt fαlls σut σf sσlutíσn ís knσwn αs thє prєcípítαtє, hєncє thє rєαctíσn's nαmє. prєcípítαtíσn rєαctíσns cαn hєlp dєtєrmínє thє prєsєncє σf vαríσus íσns ín sσlutíσn.
A precipitation reaction is a chemical reaction in which two soluble salts (ionic compounds) in an aqueous solution (solution with water as the solvent) yield insoluble, solid salt, a precipitate, as one of the products. It is generally a double replacement reaction, in which there are two ionic compounds, and their ions switch (AB+CD yield AC+BD).
Example:
[tex]\mathbb{\green{Pb(NO_{3} )_{2} +2KI ⇒2KNO_{3} +PbI_{2}}}[/tex]
N.B. The (s) indicates a solid (or precipitate), whereas (aq) means that the compound is dissolved in an aqueous (water-containing) solution.
What quantity is the sum of the kinetic energy and all forms of potential
energy in a system?
TRUE or FALSE? Objects in orbit around the Earth (like satellites) still have net forces acting on them.
Answer:
Objects in orbit around the Earth (like a satellite) still have net forces acting on them. True; An object with no net forces acting on it would not have a change in velocity. ... Therefore, there must be a net force acting on it.
Explanation:
Objects in orbit around the Earth (like satellites) still have net forces acting on them. This is true, because this net force make change in their motion.
What is force ?Force is an external force acting on object to change its state of motion or rest or to deform it. There are various kinds of forces such as gravitational force, magnetic force, nuclear force etc. Force is a vector quantity having both magnitude and direction.
The net force acting on a body depends on the direction and magnitude of all the forces acting on the object. The force acting on the objects that are orbiting around earth includes the gravitational force by earth, as well the force by other nearby planets or spatial objects etc.
Not all these force gets balanced and a net force always be there acting on these objects make them undergo changes in their state of motion.
Find more on forces:
https://brainly.com/question/13018226
#SPJ6
what happens to the electrons of an element on the left side of the periodic table when it forms an ion? what happens to the right?
Sarah drives her car with a constant speed of 64 km/h. How long will she take to travel a
distance of 173.6 kilometers? Round to the nearest TENTH
Answer:
2.7
Explanation:
Hope this helps also please follow me I am trying to help as many people possible!