Answer:
41 miles
Explanation:
Also, the straight line distance from your starting point is technically called your displacement.
dunno the answer.. ¯\_(ツ)_/¯
What information can you infer from the Lewis structure diagram shown below?
A. Boron has six valence electrons.
B. Oxygen has six valence electrons.
C. Boron has five valence electrons.
D. Oxygen has five valence electrons.
Answer:
B
Explanation:
The picture shows 'O' for oxygen and is surrounded by six dots that represent valence electrons.
lighting converts ... energy, into ... energy.
Explanation:
lighting converts heat energy.
hope you like this .
A 3-ton Toyota land cruiser travelled at a speed of 45m/s, collides with a 2- ton comfort taxi which was parked in front of the traffic lights intersection. After the collision, both cars lock together and move off in one direction. Determine the speed of cars after collision.
Answer:
v = 27 m/s
Explanation:
To find the speed of cars after the collision you take into account the momentum conservation law. Total momentum of both cars before the collision must be equal to the total momentum of both cars after the collision.
After the collision both cars traveled together, then you have:
[tex]m_1v_1+m_2v_2=(m_1+m_2)v[/tex] (1)
m1: mass of the Toyota = 3-ton = 3000 kg
m2: mass of the taxi = 2-ton = 2000kg
v1: speed of the Toyota before the collision = 45m/s
v2: speed of the car before the collision = 0 m/s (it is at rest)
v: speed of both cars after the collision = ?
You solve the equation (1) for v:
[tex]v=\frac{m_1v_1+m_2v_2}{m_1+m_2}[/tex]
Next, you replace the values of the rest of the variables:
[tex]v=\frac{(3000kg)(45m/s)+0kgm/s}{3000kg+2000kg}=27\frac{m}{s}[/tex]
hence, just after the collision both cars have a speed of 27m/s
On the moon, the acceleration of gravity is 1.6 m/s2. If an object has a
mass on Earth of 5.1 kg, what is its mass on the moon?
Answer:
5.1 kg
Explanation:
Its mass on the moon is 5.1 kg because mass is an intrinsic property of a material and does not change with location. Although, its weight might vary because its acceleration of gravity g is dependent on the mass M and radius r of the planet(in this case, moon) involved g = GM/r². Since weight W = mg is dependent o g, weight varies but mass remains constant.
if a 10 kg object has a kinetic energy of 20 J what is its speed and what is the formula used to calculate speed
Answer:
2 meter per second
Explanation:
kinetic energy = 1/2 m v^2
20J = 1/2 × 10 × v^2
v^2 = 4
v= 2 m/s
6. A 2.2 kg rock rests on the edge of a bridge that is 3.3 m above a river. What is the
gravitational potential energy of the rock when measured from the surface of the
river? What is the gravitational potential energy when measured from the edge of
the bridge?
Answer: 71 J
Explanation: The formula for gravitational potential energy is Epg= mgh.
So you plug in 2.2 as m, 3.3 as h and 9.81 as g. Once you do that you should get an answer of 71.2206. But because there are only two significant digits in the question, your answer must also have two significant digits.
The gravitational potential energy of the rock of 2.2 kg that is 3.3 m above the river is 71 J. The potential energy of the rock when measured from the edge of the bridge is zero where because rock is resting in the edge itself , so height will be zero.
What is gravitational potential energy ?Potential energy of an object is the energy generated by virtue of its position. Thus the energy is stored on the object when it rest. The energy stored on it when it is in a gravitational field is called its gravitational potential energy.
The gravitational potential energy of an object is given as follows;
p = mgh
where h is the height from the surface.
Given mass of the rock, m = 2.2 Kg
height = 3.3 m
g = 9.8 m/s²
then, p = 2.2 kg × 3.3 m × 9.8 m/s² = 71 J.
Therefore, the gravitational potential energy of the rock is 71 J.
Find more on potential energy:
https://brainly.com/question/12807194
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Электролиз продолжался 4 часа, при этом на катоде выделилось 16 g серебра. Электрохимический эквивалент серебра 1,118 mg/C. Чему равна сила тока (А) электролиза?
Answer:
Сила тока 0.994 А
Explanation:
Параметры приведены ниже;
Время = 4 часа = 14 400 с
Масса выпущенного серебра = 16 г
Электрохимический эквивалент серебра = 1,118 мг / с
Формула для количества электричества Q дается следующим образом;
Q = I × t
Куда;
I = ток (A)
t = время в секундах, с
Масса m, образующаяся при электролизе, определяется соотношением;
[tex]m = E_c \times Q = E_c \times I \times t[/tex]
Куда;
[tex]E_c[/tex] = Электрохимический эквивалент серебра = 1,118 мг / с
м = 16 г
Подставляя значения, мы имеем;
Который дает;
[tex]I = \dfrac{16}{1.118 \times 10^{-3} \times 14,400} = 0.994 \, A[/tex]
Следовательно, сила тока = 0,994 А.
If a person is kicking there legs three times every four seconds what is the frequency.
Answer:
f = 0.75 Hz
Explanation:
It is given that, a person is kicking there legs three times every four seconds. We need to find his frequency. The number of times an event is occurring is called frequency of an object. The frequency of a person is given by :
[tex]f=\dfrac{n}{T}\\\\f=\dfrac{3}{4}\\\\f=0.75\ Hz[/tex]
So, the frequency of the person is 0.75 Hz.
Se coloca una piedra de 600 g en una Honda de 50 cm y se la hace girar a una velocidad de 4 m/s. Dibuja la fuerza que ejerce la honda y calcula su módulo. ¿cómo afecta el peso a este caló? ¿Y su masa?
Answer:
Fc = 19.2 N
Explanation:
In this case, the force of the Honda over the rock, is a centripetal force. Then, you have:
[tex]F_c=m\frac{v^2}{r}[/tex]
m: mass of the rock = 600g = 0.6 kg
v: tangential velocity of the Honda = 4m/s
r: radius of the Honda = 50cm = 0.5m
You replace the values of m, r and v in the equation for Fc:
[tex]F_c=(0.6kg)\frac{(4m/s)^2}{0.5m}\\\\F_c=19.2N[/tex]
hence, the force has a magnitude of 19.2 N
If the rock would have more mass the centripetal force would be higher
Electrical conductivity in liquid solutions depends on the presence of free
Answer:
electrical conductivity in liquid solutions depends on the availability of free ions.
what is friction? effect of force
Answer:
Force
Explanation:
Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. Dry friction is a force that opposes the relative motion of two solid surface in contact.
A rock is rolling down a hill, and it’s halfway down. Would it have both Kintectic engery and Potenial engery? PLEASE HELP
Answer:
Only kinetic.
Explanation:
Potential energy means it has the potential to move. Not something already in motion.
Answer:
yes
Explanation:
it hasn't stopped moving so it still has kinetic energy and it hasn't reached what is considered 0 so yes it has both potential and kinetic energy
if you need more of an explanation let me know and ill fix it
A 7.12 μC charge is moving at the speed of light in a magnetic field of 4.02 mT. What is the force on the charge?
Answer:
858.7 N
Explanation:
The magnetic force on the charge F = Bqv where B = magnetic field strength = 4.02 mT = 4.02 × 10⁻³ T, q = charge = 7.12 μC = 7.12 × 10⁻⁶ C and v = c = speed of light = 3 × 10⁸ m/s
F = Bqc
= 4.02 × 10⁻³ T × 7.12 × 10⁻⁶ C × 3 × 10⁸ m/s
= 858.7 N
Elias serves a volleyball at a velocity of 16 m/s. The mass of the volleyball is 0.27 kg. What is the height of the volleyball above the gym floor if its total mechanical energy is 41.70 J? Round to the nearest tenth. m
Answer:
The correct answer to the following question will be "2.7 m".
Explanation:
The given values are:
Velocity, v = 16 m/s
mass, m = 0.27 kg
Mechanical energy, M.E = 41.70 J
g = 9.8 m/s²
As we know,
Kinetic energy, [tex]K=\frac{mv^2}{2}[/tex]
Potential energy, [tex]U=m.g.h[/tex]
Now, the total mechanical energy will be:
⇒ [tex]\frac{mv^2}{2}+U[/tex]
⇒ [tex]41,71 \ kg.m^2/s^2[/tex]
Now,
⇒ [tex]h=\frac{E-(\frac{mv^2}{2})}{mg}[/tex]
On putting the estimated values, we get
⇒ [tex]=\frac{41.70-(\frac{0.27(16)^2}{2})}{0.27\times 9.8}[/tex]
⇒ [tex]=\frac{41.70-(\frac{0.27\times 256}{2} )}{2.64}[/tex]
⇒ [tex]=\frac{41.70-34.56}{2.64}[/tex]
⇒ [tex]=\frac{7.14}{2.64}[/tex]
⇒ [tex]=2.7 \ m[/tex]
Answer:
2.7 m
Explanation:
A ball was dropped and had a mass of .2 kg and was falling with a force of 2 N, what was its acceleration?
Answer:
10m/s I believe
Explanation:
F=MA
A=F/M
A=2/0.2
A=10m/s
what is most often given a value of zero to describe an object position on a srtaight line
Answer: A. Reference point
Explanation: A reference point is usually the start of a location, and if it's a starting point, then it will be 0.
Have a nice day. :)
Sobre un velero actúa la fuerza del motor de 900 N y perpendicularmente a ella, la del viento de 750 N. Si se mueve con MRU, ¿qué fuerza de rozamiento actúa sobre el barco?
Answer:
[tex]F=F_{f}=1171.5 N[/tex]
Explanation:
We know that the sailboat has a uniform movement, therefore the total force, the engine, and the wind must be equal to the friction force.
[tex]F=F_{f}[/tex]
[tex]F=F_{f}=\sqrt{F^{2}_{engine}+F^{2}_{wind}}[/tex]
[tex]F=F_{f}=\sqrt{900^{2}+750^{2}}[/tex]
[tex]F=F_{f}=1171.5 N[/tex]
Therefore the friction force is 1171.5 N.
I hope it helps you!
Alexander calder's mobiles are an example of _________ motion because it uses forces of wind and water.
Answer:
It is an example of kinetic art motion
Explanation:
Alexander caders's mobile was made by an American sculptor called Alexander Cader. He made innovative kinetic mobile sculptures that use that uses motor or air currents.
Alexander caders's mobile is a kinetic sculptures because movement is it's basics. The sculptures is well moved by air currents. The Alexander cader mobiles make movement as integral part of the design of the sculpture.
Water waves and light waves are both examples to
Answer:
Transverse waves
Explanation:
Transverse waves are a type of wave that oscillates perpendicular to the direction of movement (the direction of propagation). These type of waves are usually represented by the sine or cosine functions due to the up and down oscillation of the waves.
In the case of water waves the thing that oscillates up and down are the water particles affected by the disturbance.
And for the case light waves what oscillates are the electric and magnetic fields, both oscillating perpendicular to the direction of light propagation.
why is the term impulsive of force coined
Answer: Impulse of force is a process of reducing and minimizing the impact of force on the object.
Explanation:
If an impact stops the moving object then the change in momentum will become a fixed quantity, extending the time of collision and reducing the time of impact.
For example, If a person jumps to the ground with a certain height the person will bend knees to extend the time of collision while hitting the ground and reducing the time of impact to prevent much injury.
Calculate Amirul’s displacement from his house
Answer:
100m
Explanation:
[tex]80^{2} x60^{2} = 10000\\[/tex]
[tex]\sqrt{10000} = 100[/tex]
A team of bicyclists are on bikes that require 512 J of work to ride. It takes 432 J of work for the bike to turn the gears. What is the mechanical efficiency of the bike?
Answer:
84.4 %
Explanation:
Mechanical efficiency = output work/input work × 100 %
output work = 432 J of work for the bike to turn the gears
input work = 512 J of work to ride.
Mechanical efficiency = 432 J/512 J × 100 %
= 0.844 × 100%
= 84.4 %
Sunidhi made a study chart about changes in states of
matter.
Which headings best complete the chart?
X
melting
sublimation
Y
freezing
deposition
X: Solid Directly to Liquid
Y: Liquid Directly to Solid
OX: Liquid Directly to Solid
Y: Solid Directly to Liquid
O X: Heat Is Released
Y: Heat Is Absorbed
X: Heat Is Absorbed
Y: Heat Is Released
Answer:
freezing melting sublimating x y
x and
Explanation:
To drop a table of states of matter the best headings must be
table name: matter state
freezing melting sublimation x y
This order goes from the solid state to the gaseous state, which is obtained by introducing heat into the system
Answer: D on edge
X: Heat Is Absorbed
Y: Heat Is Released
Explanation:
sublimation and melting are both absorbing heat(aka getting warmer)as they change state while freezing and deposition are releasing heat(aka getting colder)as they change state
what is electrostatic force eg
Answer:
electrostactic force mean a force exerted from a charged object
eg :- a charged comb
Explanation:
hope this helps u stay safe
Explanation:
electrostatic force is the force that exist between electrically charged particle object at rest .
example of electrostatic force :- when we run a piece of paper with the oil in our head with the help of comb produced electrostatic force.
24
Fig. 24.1 shows a liquid dropper used to draw a liquid from a bottle of
medicine. The squeeze bulb of the dropper is squeezed and then released
so that liquid from the bottle is sucked up into the tube of the dropper.
Explain how difference in air pressure enables liquid to be drawn into the
tube of the dropper.
Answer: It is due to the low air pressure in the stopper and the atmospheric pressure.
Explanation: Whenever is there is a pressure, there must be a force exerted. Because,
Pressure = Force/ Area
So, when the bulb of the dropper is squeezed, the air pressure inside the dropper decreases because all the air is forced out.
When the dropper is placed in a liquid and the squeezed bulb is released, the air pressure outside the stopper surrounding the liquid becomes high and forces the liquid inside the dropper.
The rise of the liquid into the stopper is due to the atmospheric pressure.
This is similar to drinking liquids using a straw.
PLEASE HELP ME!
Which statement is NOT true about direct proportion?
A. direct proportion is a type of relationship between two variables
B. when one variable doubles, the other quadruples
C. when one variable doubles, the other doubles too
D. when one variable is zero, the other is also zero
Answer:
d
Explanation:
when one variables is zero ,the other is also zero
what is the frequency of an ocean wave that is traveling at a speed of 45 m/s if it has a wavelength of 3 meters.
please show work
Answer:
The frequency of an ocean wave is 15 Hz.
Explanation:
We are given with, the speed of an ocean wave is 45 m/s. Its wavelength is 3 m
It is required to find the frequency of an ocean wave.
The speed of a wave is given in terms of frequency and wavelength as :
[tex]v=f\lambda[/tex],
f = frequency of ocean wave
[tex]f=\dfrac{v}{\lambda}\\\\f=\dfrac{45}{3}\\\\f=15\ Hz[/tex]
So, the frequency of an ocean wave is 15 Hz.
I need an answer ASAP, so if anyone can help right away that would be amazing!
A current-carrying wire with many loops is called
a magnetic field.
a wire coil.
a solenoid.
a bar magnet.
Answer: Solenoid
Explanation:
Answer:
Solenoid
Explanation:
A spring had a spring constant of 48N/m. The end of the spring hangs 8m above the ground. How much weight can be placed on the spring so that the end of the spring is 2m above the ground
Answer:
28.8kg
Explanation:
h1=8m
h2=2m
h2-h1=6m
k=48 N/m
g=10m/(s^2)
w=F
10m=6*48
m=28.8kg
What happens to length of the mercury column if a small amount of water vapor is in the vacuum part?
Answer:
I hope it helped you...please mark as brainliest.....thanks!!!!!!!
Explanation:
Inches of mercury is ideal for vacuum lifting with vacuum cups, as the amount of vacuum required is rarely high. Typical vacuum handling utilizes anything between 15″Hg and 25″Hg. Therefore, “Hg is suitable as a measurement of system performance in this type of operation
The column of mercury employed in a mercury barometer, the height of which (inches of mercury) is used as a measure of atmospheric pressure.
At some point, all water vapour that is found in a vacuum system came from the atmosphere. Consider that air at 25° C and 50% relative humidity contains 12 torrs of water vapour. ... Additionally, any surface will adsorb a certain number of monolayers of water molecules.
Credits:
Vacuum Measurement: A Basic Guide - Fluid Power Journal
Sources of Water Vapor in Vacuum Systems | Normandale ...
