Answer: You can easily find out the beginning point of the line by using dot representation. When it comes to position vector, it expresses the exact position of certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end which is fixed to its body.
brainliest please :)
Answer:
We can easily find out the beginning point of the line by using dot representation. When it comes to the position vector, it expresses the exact position of a certain object from the starting point of the coordinate system. The vector is a straight line that has a certain end that is fixed to its body.
!!!!!!PLEASE HELP ASAP !!!!!!!!!!!!
Answer: d constint speed
Explanation: im 15 and no the answer
Question 9 of 10
Which two changes would increase the gravitational force between two
objects?
O A. Decrease the distance between the objects.
B. Decrease the mass of both objects.
C. Increase the distance between the objects.
D. Increase the mass of one of the objects.
U
E. Decrease the mass of one of the objects.
SUBM
Answer:
the answer is A and B, decrease in distance and decrease in mass
The theory of continental drift proposes that the Earth's continents may have once been united as a supercontinent but have drifted apart over time.
What was the name of the supercontinent?
Answer:
Alfred Wegener proposed that the continents were once united into a single supercontinent named Pangaea, meaning all earth in ancient Greek. He suggested that Pangaea broke up long ago and that the continents then moved to their current positions. He called his hypothesis continental drift.
Explanation:
hope it was helpful
What are atoms and elements?
Answer:
Atom, smallest unit into which matter can be divided without the release of electrically charged particles.
an element is a pure substance which cannot be broken down by chemical means
Answer: atoms and elements?) ... A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
Explanation: atoms and elements?) ... A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
1. Why is life on Earth not possible without plants? Explain using elements/ CO2 O2 and H2O
Un cilindro de gas a 32 °C normalmente tiene una presión interna de 11 atm, sin embargo, la válvula de alivio se debería abrir antes de llegar a 19, 380 mmHg. ¿A qué temperatura es cuando la válvula se abre para liberar la presión interna?
Answer:
T₂ = 72ºC
Explanation:
In this exercise let us reduce the pressure to the SI system
P = 11 ata (1 10⁵ Pa / 1 atm) = 11 10⁵ P
y = 19380 mmHg
pressure is
P = ρ g h
P = 13.6 10³ 9.8 19380 10⁻³
P = 2.5 10⁶ Pa
Now we can use the ideal gas equation to
PV = nR T
PV / T = n R
Let's use the subscript 1 for the starting point and the subscript 2 for the point where the valve opens at a constant volume
P₁ V / T₁ = P₂ V / T₂
T₂ = P₂ T₁/ P₁
let's calculate
T₂ = (2.5 10⁶/11 10⁵ 32
T₂ = 72ºC
What is the velocity of a wave that has a frequency of 2,500 Hz and a wavelength of 2.5 meters?
1,225 m/s
5,000 m/s
500 m/s
50 m/s
Answer:
5000
Explanation:
m/a
maybe
or maybe not
sorry help
2.0 A are flowing through an electric motor. How long will it take for 40 Coulombs to flow through the motor?
Answer:
Answer: Magnitude = [____]; unit = [____].
Explanation:
Tanya randhawa is standing on top of a train that is traveling at 7 km/sec. The train hits a cow and comes to a complete stop. There is no gravity or friction in Tanyas world. According to newton's first law what happens to tanya
Answer:
Since there is no gravity or friction in Tanya's world, according to Newton's first law she will keep moving at a constant speed.
Explanation:
Newton's First Law, or also called the Law of Inertia, postulates that every body that is not subjected to any interaction (free or isolated body) remains at rest or moves with constant speed. In other words, it is not possible for a body to change its initial state (whether of rest or motion) unless one or more forces intervene.
In this law then the net force (Σ F) applied on a body is equal to zero and explains that to modify the state of motion of a body it is necessary to act on it.
Tanya randhawa is standing on top of a train traveling at 7 km / sec and the train collides with a cow and comes to a complete stop. Since there is no gravity or friction in Tanya's world, according to Newton's first law she will keep moving at a constant speed.
10 rectangular object's mass from greatest to least. You can choose books, sandwiches, phones, pictures - as long as the shape is a rectangle. Then rank the objects from the one with the heaviest mass to the one with the lightest mass.
Answer: 1 is phone 2 is sandwich, Last is picture.
Explanation: I hoped That Helped !!
A wave has a wavelength of 0.5 meters and a frequency of 120 Hz. What is the wave’s speed?
Answer:
60 m/s
Explanation:
v = ?
lamda = 0.5 m
f = 120 Hz
v = 120 × 0.5
v = 60 m/s
The wave moves at a speed of 60 m/s at the specified wavelength and frequency.
What is the Wavelength?A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (adjacent crests) in the consecutive cycles. Its length is typically defined in wireless systems in metres (m), centimetres (cm), or millimetres (mm) (mm).
The wavelength is more frequently described in nanometers (nm), which are quantities of [tex]10^-^9 m[/tex], or angstroms (), which are units of [tex]10^-^1^0 m[/tex], for infrared (IR), visible light (UV), and gamma radiation ().
For above given example,
Wavelength is equal to 0.5 metres and frequency is equal to 120 hertz.
The general wave equation is applied to determine the wave's speed as illustrated below;
v = fλ
where; The wave's speed is v.
v = 120 x 0.5
v = 60 m/s
Thus, the wave moves at a speed of 60 m/s at the specified wavelength and frequency.
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As a result of mitosis, the cels of a Molecular organism sure which of these properties select to correct answers. A. All cells have the same number of chromosomes. B. The number of chromosomes varies amongst the cells C. All cells have identical genetic information. D. Genetic information varies among the cells.
Answer:
C. All cells have identical genetic information.
Answer:
A and C
Explanation:
3. The earth exerts a gravitational force of 530 N on an object. What is the mass
of the object in kilograms?
===============================================
The force is F = 530 newtons.
The acceleration of gravity on earth is approximately 9.8 m/s^2, so a = 9.8
Use Newton's second law to find m
F = m*a
530 = m*9.8
9.8m = 530
m = 530/9.8
m = 54.0816326530612
m = 54
The mass is about 54 kg.
Answer:
around 53-54
Explanation:
the gravitational pull is almost 10 (9.807 m/s²) so as long as the numbers are not that big its easy and mostly accurate to divide by 10
Places on earth where most of the earthquakes originated or some mountains and
volcanoes were formed mark the boundaries of each ____________plate.
Answer:
techtonic
Explanation:
BRAINLIEST HERE COME GET IT
Answer:
The answers is A lol
Explanation:
HELP ME PLSSS!!! WILL MARK BRAINLIEST!!
Answer:
D
Explanation:
Help me pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Answer:
A (the first one)
Explanation:
Two men are standing on a frictionless ice surface holding opposite ends of a rope. One man (mass = 80 kg) pulls on the rope with a force of 250 N. The other has a mass of 60 kg. What is the acceleration of each man?
Answer:
The acceleration of man 1 and 2 is [tex]3.125\ m/s^2[/tex] and [tex]4.167\ m/s^2[/tex].
Explanation:
Mass of man 1, m₁ = 80 kg
Mass of man 2, m₂ = 60 kg
One man pulls on the rope with a force of 250 N.
Let a₁ is acceleration of man 1,
F = m₁a₁
[tex]a_1=\dfrac{F}{m_1}\\\\a_1=\dfrac{250}{80}\\\\a_1=3.125\ m/s^2[/tex]
Let a₂ is acceleration of man 1,
F = m₂a₂
[tex]a_2=\dfrac{F}{m_2}\\\\a_2=\dfrac{250}{60}\\\\a_2=4.167\ m/s^2[/tex]
So, the acceleration of man 1 and 2 is [tex]3.125\ m/s^2[/tex] and [tex]4.167\ m/s^2[/tex].
I WILL GIVE BRAINLIEST TO WHOEVER GETS THIS QUESTION CORRECT!!!
Which statement is true of a distance-time graph?
A.) A line with a curve indicates that the object has a constant speed.
B.) The line in the graph points downward if the object is speeding up.
C.) The line shows a change in speed if its angle changes.
D.) The line shows the path of the object that is moving.
Answer: c) The line shows a change in speed if its angle changes.
I'm not sure
Explanation:
ned
An object is placed (90 cm) from a convex lens whose focal length is
(30cm). What is the image position (xi)?
Answer:
45 cm
Explanation:
The formula to apply in this question is that of object distance , image distance and focal length.
This is written as;
[tex]\frac{1}{f} =\frac{1}{o} +\frac{1}{v}[/tex]
where;
f= focal length = 30cm
o= object distance = 90 cm
v= image distance = ?
Applying real values as;
1/30 = 1/90 + 1/v
1/30 - 1/90 = 1/v
1/45 = 1/v
v= 45 cm
5 15. Father drove 152 km in 10.0 hours. For the first 85 km, he spent for 7.0 hours. What was his average speed in km/h for the remaining journey? ANSWER IN THE CORRECT NUMBER OF SIG. FIG.5
Answer:
3.06km/hr
Explanation:
Average speed (km/hr) = distance (km)/time(hr)
Total average speed = 152/10
= 15.2km/hr
For the first 85km which he drove for 7hours, average speed = 85/7
= 12.14km/hr
His average speed in km/h for the remaining journey will, therefore, be:
15.2km/hr - 12.14km/hr
= 3.06km/hr
Which equation shows the relationship of wave speed to
wavelength and wave frequency?
a Speed = Wavelength x Frequency
b Speed = Wavelength/Frequency
C Speed = Frequency/Wavelength
d None of the above
Answer:
Answer is A
Speed = Wavelength × Frequency
Explanation:
Googled it
In boiling water, water molecules move apart and escape in the form of water vapor. The process is called_
Answer:
Evaporation
Explanation:
Evaporation occurs when a liquid changes to a gas. During evaporation, molecules gain enough thermal energy to escape from the liquid surface into the air as water vapor. Water-vapor molecules spread out, breaking completely free of each other, and then disperse or spread out among the other gas molecules in the air.
Hope this helps stay safe
love anyla..
Answer:
evarporation that is the answer i think because molecules of liqid are sperated thats why when in boiling water The molecules move apart and escape in vapour even i don't think it is the right answer
Why are many adults and youth in the United states overweight?
Answer:
I'd imagine fast food is a lot more popular than most countries over there and easier to get hold of.
Explanation:
america
Answer:
There are different answers to that, like if you read a passage or something.
Explanation:
These days many people do not get exercise. A lot of jobs are now done indoors and do not require any physical activities. Technology is becoming more advanced and many people prefer using machines to do the heaving lifting.
There are a lot of fast-food restaurants and this is where a lot of people in the US choose to eat. The food is cheap and easy to pick up. This food is convenient for people on the go. The food is not healthy and it causes weight gain.
In the US, many young children find it cool to smoke. Smoking decreases the body's strength and it causes a decrease in physical health, causing people to gain weight.
Everyone has a phone these days, if not some kind of electronic device to chat with people or play games. Over time, playing on electronic devices replaces doing physical activities.
Can someone help me plz
Answer:
Oceanographers can measure the salinity of a body of water in several ways, but the two most common methods are using a hydrometer set or a salinometer.
A hydrometer set consists of a cylinder, a hydrometer, a thermometer, and a temperature-salinity-density or TSD graph.
Explanation:
Hope this helps
if so please mark brainlist! thx
Answer:
B
because measuring the density of the water
A mass slides from rest down a 45 degree incline that has a coefficient of kinetic friction
equal to 0.2. What is the speed of the mass after it has slid for a total of 2 meters?
Answer:
The speed of the mass after it has slid for a total of 2 meters is 4.71 m/s.
Explanation:
The speed of the mass can be found using Newton second law:
[tex] \Sigma F = ma [/tex]
[tex] P_{x} - F_{\mu_{k}} = ma [/tex]
Where Pₓ is the weight force in the horizontal direction and [tex]F_{\mu_{k}}[/tex] is the friction force.
[tex]mgsin(\theta) - \mu_{k}mgcos(\theta) = ma[/tex]
[tex]a = g(sin(\theta) - \mu_{k}cos(\theta)) = 9.81 m/s^{2}(sin(45) - 0.2*cos(45)) = 5.55 m/s^{2}[/tex]
Now, we can find the speed of the mass using the following kinematic equation:
[tex] v_{f}^{2} = v_{0}^{2} + 2ax [/tex]
[tex]v_{f} = \sqrt{0 + 2*5.55 m/s^{2}*2 m} = 4.71 m/s[/tex]
Therefore, the speed of the mass after it has slid for a total of 2 meters is 4.71 m/s.
I hope it helps you!
Question 23 of 32
A truck has a mass of 9000 kg and a kinetic energy of 18,000 J. What is its
speed?
A. 4 m/s
B. 8 m/s
C. 2 m/s
D. 1.4 m/s
UBMIT
Answer:
2m/s
Explanation:
Given parameters:
Mass of truck = 9000kg
Kinetic energy = 18000J
Unknown:
Speed = ?
Solution:
Kinetic energy is the energy due to the motion of a body;
K.E = [tex]\frac{1}{2}[/tex] mv²
So;
m is the mass
v is the speed
2 KE = mv²
2 x 18000 = 9000 x v²
v² = 4
v = 2m/s
1.The lunch lady pushes a 100 kg zombie with 300 N of force. How much is the zombie accelerated?
2. Pushing over the file cabinet to keep out the zombies requires 1000 N of force. The cabinet accelerates at 20 m/s 2 . What is the mass of the cabinet?
Answer:
1. A=3.00m/s 2.m=50kg
Explanation:
1. Use the formula a=f/m
a=300/100
a=3
2.Use the formula m=f/a
m=1000/20
m=50kg
1. Acceleration is calculated to be equal to, a=3.00m/s
2. Mass of the cabinet is, m=50kg
What is acceleration and force?Rate of change of velocity of the object in the same straight line is known as acceleration. Acceleration is any process where the velocity changes. There are only two ways to accelerate that is either to change your speed or direction or change both of them.
Physical influence that is when applied to an object causes it to accelerate in the direction from where it was applied is known as force.
1. Given :
m = 100kg, force= 300N
Using the formula :
a=f/m
a=300/100
a=3 m/s
2. Given,
F= 1000N, a= 20m/s
Using the formula :
m=f/a
m=1000/20
m=50kg
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What is the magnitude (size) and direction of the cumulative force acting on the car shown in the picture above?
A.
2500 N up
B.
30 N to the right
C.
30 N to the left
D.
2500 N down
Answer:
B
Explanation:
.....50N-20N =30N ...
Answer:
B. 30 N to the right
Explanation:
The weight of the car, 2500 N, is pushing down while the road is pushing up with a force of equal magnitude. Those forces cancel each other out. The car is being pushed to the left with a force of 20 N and to the right with a force of 50 N. Thus, the cumulative force is 30 N to the right.
An ice cube tray full of water is put into a freezer. The water eventually reaches 0ºC and undergoes a phase change from a liquid to a solid. Which change occurs in the particles in the water as it undergoes a phase change?(1 point)
The average kinetic energy decreases due to the arrangement of the particles.
The average kinetic energy decreases due to the motion of the particles.
The potential energy decreases due to the motion of the particles.
The potential energy decreases due to the arrangement of the particles.
Answer:
a
Explanation:
the kinetic energy decreases which makes the molecules bond together, that makes them not be able to move much
The average kinetic energy decreases due to the motion of the particles. Hence, option (b) is correct.
Given data:
The ice cube tray full of water kept in a refrigerator.
And water reaches at 0ºC to undergo the phase change from liquid to solid.
We know that, "The energy possessed by a molecule or any object due to its motion is known as average kinetic energy of molecule/object".
Now at initial the tray containing the water molecules were in liquid state. And in liquid state, the intermolecular interaction is less than that of solid. So water molecules were having more value of average kinetic energy.
When the temperature of water in the tray is reduced to 0ºC , then the they converted into solid with strong intermolecular interaction. And with this, now water molecules are not that much free to move, hence decrease in average kinetic energy occurs in the particles in the water as it undergoes a phase change.
Thus, we can conclude that the average kinetic energy decreases due to the motion of the particles. Hence, option (b) is correct.
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