Answer:16875joules
Explanation:
Mass=m=150kg velocity=v=15m/s
kinetic energy =(m x v^2)/2
Kinetic energy =(150x15^2)/2
Kinetic energy =(150x225)/2
kinetic energy =33750/2
Kinetic energy =16875joules
Is hydrogen chloride a mixture
1.The electromagnetic spectrum contains many types of __________. A) waves B) Objects C) Particles
2.The colors we see are all part of ___________ ______________.
A) X rays B) UV waves C) visible light
3. We can see because of ___________ ______________.
A) UV waves B) infrared light C) visible light
4. When visible light passes through a prism or a drop of water, the light _________ and we see a rainbow of color.
A) Bends B) Reflects C) Bounces
Answer:
1-A
2-C
3-C
4-A
Explanation:
1. waves
2. visible light
3. visible light
4. bends
1. The electromagnetic spectrum contains many types of waves.
A) waves B) Objects C) Particles
An electromagnetic spectrum has frequency, from lowest to highest frequency, therefore including all radio waves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.
2. The colors we see are all part of visible light.
A) X rays B) UV waves C) visible light
The light we are able to see is called the visible light spectrum, which ranges from violet light, having a wavelength of approx. 400 nanometers, to red light, having a wavelength of around 650-700 nanometers.
3. We can see because of visible light.
A) UV waves B) infrared light C) visible light
We are able to see because of the sunlight striking an object and reflecting back which moves through space and reaches our eyes.
4. When visible light passes through a prism or a drop of water, the light bends and we see a rainbow of color.
A) Bends B) Reflects C) Bounces
The rainbow effect occurs because when light strikes a water droplet, it is refracted at the boundary of air and water, and enters the droplet, where the light is dispersed into the seven colors, the light is then reflected inside the droplet and finally refracted out again into the air.
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9. (02.04 LC)
Which of the following most likely happens when the temperature of a chemical reaction is increased? (5 points)
Molecules speed up
Molecules stop reacting
Reaction rate decreases
Chemical reaction stops
Answer:
Molecules speed up
Explanation:
This is caused because of the temperature increasing. The temperature increase is telling us that the thermal energy of the reaction is increasing. When the energy is increased molecules increase their speed, because they have more energy in them
Answer:
Molecules speed up
Explanation:
How many electrons are in a hydrogen atom?
Answer:
1
Explanation:
If you take a look on a periodic table of elements, you will notice that hydrogen has the atomic number of 1. This number directly corresponds to the number of electrons an atom has.
Let me know if you have any other questions!
A neutral hydrogen atom has exactly one electron orbiting its nucleus. This electron is situated in the 1s orbital, part of the atom's valence shell, highlighting hydrogen's unique position in the periodic table and its ability to bond with other elements.
Explanation:A hydrogen atom consists fundamentally of a nucleus and one electron orbiting this nucleus. When we discuss a neutral hydrogen atom, we refer to an atom where the number of protons (positively charged particles within the nucleus) is equal to the number of electrons (negatively charged particles orbiting the nucleus). Since hydrogen is the first element in the periodic table, it has exactly one proton in its nucleus. Consequently, to maintain electrical neutrality, a hydrogen atom also has exactly one valence electron. This electron occupies the 1s orbital, the closest orbital to the nucleus, which is part of the hydrogen atom's n = 1 valence shell.
This shell can hold up to two electrons, showing hydrogen's potential to bond or interact with other atoms either by losing its electron to become a cation (H+) or by gaining an electron to form a hydride ion (H−), or it can share its electron to form a single covalent bond. Therefore, hydrogen is not only a group 1 element but also shares characteristics with group 17 elements due to its unique electron configuration.
Two double bonds means that the total number of electrons being shared in the molecule is.
A. two
B. four
C. six
D. eight
(PLEASE HURRY AND ANSWER THIS QUESTION!)
Answer:
(D) eight
Explanation:
In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, therefore the molecule is formed by two double bonds. Two double bonds means that the total number of electrons being shared in the molecule is. eight.
Which two atmospheric gases do not react with many substances?
A.
Oxygen (O2)
B.
Argon (Ar)
C.
Nitrogen (N2)
D.
Carbon dioxide (CO2)
PLZ help :(
Answer:c and d
Explanation:
i just looked it up and read
Answer:
Argon(Ar) and Nitrogen(N2)
Explanation:
How much physical activity do adults need?
A. 60 minutes per day
B. 150 minutes per week
C. 20 minutes every other day
D. 90 minutes per week
Answer:
B. 150 minutes per week
Explanation:
American Heart Association suggests at least 150 minutes per week of moderate-intensity aerobic activity to adults.
Can water and wind change the shape of a mountain
Yes, Water and wind can change the shape of a mountain through the process of erosion. The mountains' sharp peaks and edges evolve from these erosive forces rather than their initial formation. In contrast, the Moon's mountains remain smooth because of the lack of water and wind erosion.
Yes, water and wind can indeed change the shape of a mountain. Through the process of erosion, elements such as water and ice weather the rocks of mountain ranges, reshaping their profiles over time. For instance, the sharp peaks and serrated edges of mountains are not the direct result of the forces that initially upthrust the crust to form the ranges; instead, these features develop from erosional processes that gradually tear down the mountains. Ice erosion, in particular, acts as a powerful sculptor of mountainous terrain.
Additionally, mountain grasses are influenced by strong winds, which can bend them and alter the landscape over time. During different times of day, mountain-valley winds occur due to temperature variations that cause air to rise or fall along mountain slopes, which can also impact the mountain's shape gradually. The same is true for ocean waves, which wear away the land and change the shapes of coastlines. The formation of the 'The Wave' at Vermillion Cliffs, along the Utah and Arizona border, is an example of how erosion by water and wind can sculpt landforms.
Contrasting with the earth, the Moon provides an example of how mountains look when they are not sculpted by these erosive forces. The Moon's highlands have a smooth and dulled appearance due to the absence of water and wind erosion, offering a stark comparison to Earth's dynamic erosive processes.
What kind of line on a distance vs. time graph indicates that the object is accelerating?
Answer: a curved line
Explanation: a straight line indicates that the object is moving at a constant velocity because it has one slope, but a curved line on a distance-time graph indicates that the velocity is constantly changing because the slope is changing, which is acceleration. the line could be curved in any direction, as long as it shows a change in slope.
Final answer:
A curved line on a distance vs. time graph indicates that the object is accelerating. For constant acceleration, this curve will be parabolic. Acceleration is the slope of the tangent on the velocity vs. time graph derived from the distance-time graph.
Explanation:
On a distance vs. time graph, an object that is accelerating will not have a straight line but rather a curved line. This curve represents the change in speed over time. If the object is speeding up, the curve will be getting steeper, which indicates positive acceleration. In the case of constant acceleration, the distance-time graph is a parabola. The acceleration can be determined from the slope of the velocity vs. time graph, which in turn can be derived as the derivative of the position function from the distance-time graph. In conclusion, an accelerating object will be represented by a curved line on a distance vs. time graph, with the curvature indicating the acceleration's direction and magnitude.
if there is 60cm3 of oil in ameasuing cylinder.what will be its mass
Answer: 0.057 kg
Explanation:
We can find the mass of the oil if we know its density and the volume it occupies. Since the density [tex]\rho[/tex] is a relation between the mass [tex]m[/tex] and the volume [tex]V[/tex] of a substance:
[tex]\rho=\frac{m}{V}[/tex] (1)
Now, the density of oil is generally between [tex]700 \frac{kg}{m^{3}}[/tex] and [tex]950 \frac{kg}{m^{3}}[/tex]. However, in this case we will take [tex]950 \frac{kg}{m^{3}}[/tex] as its density.
In adition, we are given as data the volume thw oil occupies:
[tex]V=60 cm^{3} \frac{1 m^{3}}{(100 cm)^{3}}=6(10)^{-5} m^{3}[/tex]
Writing these values in (1):
[tex]950 \frac{kg}{m^{3}}=\frac{m}{6(10)^{-5} m^{3}}[/tex] (2)
Isolating [tex]m[/tex]:
[tex]m=0.057 kg[/tex] This is the mass of the oil
A force of 40 N is applied to a 6 kg box of books. If the frictional force acting on the box is 16 N, and the box was initially at rest, what is the velocity of the box 10 s later? What is the box’s displacement over the 10 s period?
The final velocity is 40 m/s. The box will undergo a displacement of 200 m over the period of 10 s.
Answer:
Explanation:
So the net force acting on the box of books will be the difference of normal force and frictional force acting on the box. As the normal force acting on the box is 40 N and the frictional force is 16 N, then the net force is
Net force = 40 N - 16 N = 24 N.
Also, the mass of the box is given as 6 kg. So as per second law of motion, the acceleration can be found by ratio of net force to mass of the object.
Acceleration of the box = Net force/Mass = 24/6=4 m/s².
Then velocity can be determined using the first equation of motion.
v = u + at =0 + (4× 10 s) = 40 m/s.
So the final velocity is 40 m/s.
Similarly, by using the second equation of motion,
s = ut +1/2 at²
s = (0×10)+(0.5×4×10×10)=200 m
And so, the box will undergo a displacement of 200 m over the period of 10 s.
Earth is round, but it looks flat to someone near the ground. Use this idea to explain why the image a concave mirror forms of an object less than one focal length away is a virtual image.
Image formed by concave mirror when an object is place less than one focal length away is a virtual image.
Explanation:
When an object is placed less than one focal length from concave mirror, the light rays from the same point on object reflect on the mirror and diverge. Hence causing the image formed to be magnified and virtual. The image must be found by extending the reflected beams in reverse direction of the mirror.The intersection point is the virtual image area. Similar concept can be used to explain why earth looks flat to someone near the ground.
Find the total kinetic energy of a 10 kg object traveling at 5 m/s to the right and a 15 kg object traveling at 10 m/s to the left?
Answer:875joules
Explanation:
Which best describes the relationship between internal energy and thermal energy? Thermal energy is a measure of the internal energy of a substance. Internal energy is a measure of the thermal energy of a substance. Internal energy is the portion of thermal energy that can be transferred. Thermal energy is the portion of internal energy that can be transferred.
Answer:
Thermal energy is the part of internal energy that is capable of being transferred to other objects.
Explanation:
Thermal energy is capable of being transferred until the objects become the same temperature, called equilibrium.
The best description of the relationship between internal energy and thermal energy is thermal energy is the portion of internal energy that can be transferred. The correct option is d.
What is thermal energy?The energy present in a system that determines its temperature is referred to as thermal energy. Thermal energy flows as heat. Thermodynamics is a whole field of physics that studies how heat is transmitted between various systems and how work is performed in the process.
Heat is the component of thermal energy that may be transferred, and heat is the energy that moves within. In thermodynamics, the internal energy is a property or state function that characterizes a substance's energy in the absence of capillary effects and the impacts of external magnetic, electric, and other fields.
Therefore, the correct option is d, Thermal energy is the portion of internal energy that can be transferred.
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How much energy is required to raise the temperature of 50.0 grams of water 10.0 degree C? (Explain yourself answer in joules!)
Final answer:
To raise the temperature of 50.0 grams of water by 10.0 degrees Celsius, 2092 joules of energy are required, calculated using the specific heat capacity formula where the specific heat capacity of water is 4.184 J/g°C.
Explanation:
To calculate how much energy is required to raise the temperature of 50.0 grams of water by 10.0 degrees Celsius, we use the specific heat capacity formula:
q = mcΔT
where:
q is the heat energy in joules,m is the mass of the water in grams,c is the specific heat capacity of water (4.184 J/g°C), andΔT is the change in temperature in degrees Celsius.Substituting the given values:
q = (50.0 g) x (4.184 J/g°C) x (10.0 °C)
q = 2092 J
Therefore, it requires 2092 joules of energy to raise the temperature of 50.0 grams of water by 10.0 degrees Celsius.
Can u guys please answer this. And explain ur answer pleaseeeeeee❗️❗️❗️❗️
Answer:
Imp = -4 [kg*m/s]
Explanation:
To determine the impulse we must know the initial speed and final velocity of the ball, that is before and after hitting the wall. As these data are given in the input information, we can very easily find the value of the impulse given during the hit on the wall.
[tex]m*v_{1}+Imp=mv_{2} \\Imp= m*v_{2}-m*v_{1}\\Imp = (2*4)-(2*6)\\Imp = -4[kg*\frac{m}{s} ] \\[/tex]
The negative sign means that the impulse is given in the opposite direction to the one that the ball was thrown.
A sprinf has a potential energy of 84.08 J and a constant of 342.25 N/m. How far it been stretched? Use potential energy elastic equation (1/2kx^2)
The spring has been stretched 0.701 m
Explanation:
The elastic potential energy of a spring is the potential energy stored in the spring due to its compression/stretching. It is calculated as
[tex]E=\frac{1}{2}kx^2[/tex]
where
k is the spring constant
x is the elongation of the spring with respect to its equilibrium position
For the spring in this problem, we have:
E = 84.08 J (potential energy)
k = 342.25 N/m (spring constant)
Therefore, its elongation is:
[tex]x=\sqrt{\frac{2E}{k}}=\sqrt{\frac{2(84.08)}{342.25}}=0.701 m[/tex]
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Which of these waves CANNOT travel through the vacuum of space?
010 10.0 points
Calculate the depth in the ocean at which the
pressure is three times atmospheric pressure.
Atmospheric pressure is 1.013 x 10° Pa. The
acceleration of gravity is 9.81 m/s2 and the
density of sea water is 1025 kg/m”.
Answer in units of m.
Answer:
Therefore the depth in the ocean at which the presser is three times atmospheric presser is 20.15 m.
Explanation:
The pressure at some depth
[tex]P=P_\circ +\rho gh[/tex]
[tex]P_\circ=[/tex] atmospheric presser = [tex]1.013\times 10^5[/tex] Pa
[tex]\rho=[/tex] density of the sea [tex]= 1025 kg / m^3[/tex]
g = gravity = 9.81 m/s²
h = depth of the ocean
P= atmospheric presser at depth = [tex]3P_\circ[/tex]
Therefore
[tex]3P_\circ=P_\circ +\rho gh[/tex]
[tex]\Leftrightarrow \rho gh=2P_\circ[/tex]
[tex]\Leftrightarrow h=\frac{2P_\circ}{\rho g}[/tex]
[tex]\Leftrightarrow h=\frac{2 \times 1.013 \times 10^5}{1025 \times 9.81}[/tex]
[tex]\Leftrightarrow h= 20.15[/tex]
Therefore the depth in the ocean at which the presser is three times atmospheric presser is 20.15 m.
A 0.17 kg hockey puck slows down trom 54 m/s to 35 m/s when it slides on horizontal ice surface. Find the change in momentum of the puck?
Answer:
D_momentum = 3.23[kg*m/s]
Explanation:
The change of moment can be easily determined by applying the principle of momentum and amount of movement
initial data are:
[tex]m_{1}=0.17[kg]\\ m_{2}=0.17[kg]\\v_{1}=54[m/s]\\v_{2}=35[m/s]\\D_{momentum}= m_{1}*v_{1}-m_{2}*v_{2}\\D_{momentum}=0.17(54-35)\\D_{momentum}= 3.23[kg*m/s][/tex]
Given values,
Mass,
[tex]m_1 = 0.17 \ kg[/tex][tex]m_2 = 0.17 \ kg[/tex]Velocity,
[tex]v_1 = 54 \ m/s[/tex][tex]v_2 = 35 \ m/s[/tex]We know,
→ [tex]D_{momentum } = m_1\times v_1-m_2\times v_2[/tex]
By putting the values,
[tex]= 0.17\times 54-0.17\times 35[/tex]
[tex]= 0.17(54-35)[/tex]
[tex]= 0.17\times 19[/tex]
[tex]= 3.23 \ kg.m/s[/tex]
Thus the above approach is right.
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ionic bonds form between what
the base of a rectangular vessel measure 10m by 18cm. water is poured into a depth of 4cm. (a) what is the pressure on the base?. (b) what is the thrust on the base?.
Answer:
a) P =392.4[Pa]; b) F = 706.32[N]
Explanation:
With the input data of the problem we can calculate the area of the tank base
L = length = 10[m]
W = width = 18[cm] = 0.18[m]
A = W * L = 0.18*10
A = 1.8[m^2]
a)
Pressure can be calculated by knowing the density of the water and the height of the water column within the tank which is equal to h:
P = density * g *h
where:
density = 1000[kg/m^3]
g = gravity = 9.81[m/s^2]
h = heigth = 4[cm] = 0.04[m]
P = 1000*9.81*0.04
P = 392.4[Pa]
The force can be easily calculated knowing the relationship between pressure and force:
P = F/A
F = P*A
F = 392.4*1.8
F = 706.32[N]
a). The pressure that lies on the base would be:
[tex]P =392.4[Pa][/tex]
b). The thrust that exists on the base would be:
[tex]F = 706.32[N][/tex]
a). Given that,
Length of the rectangular vessel [tex]= 10m[/tex]
The Breadth of the rectangular vessel [tex]= 18cm or 0.18m[/tex]
Area of the vessel [tex]= L[/tex] × [tex]B[/tex]
[tex]= 10[/tex] × [tex]0.18[/tex]
[tex]= 1.8m^2[/tex]
To find the pressure,
Pressure(p) = Density × g × h
With
Density [tex]= 1000 kg/m^3[/tex]
Gravity(g) = [tex]9.81m/s^2[/tex]
Height(h) = [tex]4 cm[/tex] or [tex]0.04m[/tex]
So,
P [tex]= 1000[/tex] × [tex]9.81[/tex] × [tex]0.04[/tex]
∵ [tex]P = 392.4[/tex]
b). Since,
Pressure [tex]= F/A[/tex]
⇒ [tex]F = P[/tex] × [tex]A[/tex]
⇒ [tex]F = 392.4[/tex] × [tex]1.8[/tex]
∵ Thrust or Force [tex]= 706.32 N[/tex]
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Identify the method of thermal energy transfer.
Answer:
a: radiation
b: convection
c: conduction
Explanaa:tion:
Consider the gravity of the four spheres. If we wanted sphere C to attract the other three spheres, what is one feature of sphere C we must change?
A) Increase its mass.
B) Make it less dense.
C) Increase its diameter.
D) Change its composition.
Answer:
The correct answer is A.
Explanation:
A greater mass means a greater gravitational pull. To give Sphere C more gravitational pull you mus increase its mass
mass = m
mass = 2m
T = 15
T = 15
1. How does the centripetal acceleration of A compare to that of B?
A. AB
B.A<
B C . A=B
Explanation or Work:
Answer:
AB 15×15=225
A<B false because A=B
the answer is c because A=B
0. A 1700-W machine operates at 120 V. What i
machine operates at 120 V. What is the resistance in the machine?
A. 7.1 x 1022 ohms
B. 1.2 x 1021 ohms
C. 1.4 ohms
D. 8.5 ohms
Option D
The resistance in machine is 8.5 ohms
Solution:
Given that,
Power = 1700 W
Voltage = 120 V
We have to find the resistance in machine
The formula used is:
[tex]P = \frac{V^2}{R}[/tex]
Where,
"P" is the electric power and "V" is the voltage and "R" is the resistance
Substituting the given values we get,
[tex]1700 = \frac{120^2}{R}\\\\1700 = \frac{14400}{R}\\\\R = \frac{14400}{1700}\\\\R = \frac{144}{17}\\\\R = 8.47 \approx 8.5[/tex]
Thus resistance in machine is 8.5 ohms
If an object has a density greater than the liquid in which it is placed, I predict that it will:
If an object has a density greater than the liquid in which it is placed it will sink.
Explanation:
Density of the object can be known by its mass and volume.
If two objects have same volume but different masses it means the one having more mass will have higher density. Density is amount of mass per unit volume.
Objects that are tightly packed have higher density.
According to Archimedes' principle when a body is fully immersed that an upward buoyant force is equal to weight of the fluid that object displaces.
Objects with a greater density than a surrounding liquid will sink while objects with a lesser density will float, as explained by Archimedes' Principle.
Explanation:If an object has a density greater than the liquid in which it is placed, it will sink. This can be explained by Archimedes' Principle, which suggests that an object's buoyancy or tendency to float is determined by the relative densities of the object and the fluid it is in. The denser an object is, the more weight it has for its size, which means it is less buoyant and more prone to sinking than floating.
For example, if you drop a stone (denser) in a pond, it will sink because its density is greater than that of water. On the other hand, ice, which is less dense than water due to its molecular structure, will float.
Alternatively, objects with a density less than the liquid they are placed in will float, like oil on water, hot air balloons in the atmosphere, or bits of cork in wine. This is because they displace more fluid weight than their own, creating a buoyant force that exceeds their own weight.
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How much work is done if a 50.ON force is applied on an object in the direction of
motion while the object slides 3.00 m across the floor?
Answer:150Nm
Explanation:
Force=50.0N distance=3.00m
Work=force x distance
Work=50 x 3
Work=150Nm
A wave oscillates 5.0 times a second and has a speed of 4.0m/s what is the frequency of this wave
The frequency of a wave oscillates 5.0 times a second and has a speed of 4.0m/s is F=5Hz
what is the frequency of this wave?Question Parameters:
A wave oscillates 5.0 times a second and has a speed of 4.0m/s
Generally, the equation for the Frequency is mathematically given as
F=v/\lambda
Or
F=1/T
Therefore
Frequency is simply the amount of times the wave oscillates
In conclusion, The frequency of the wave is
F=5Hz
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Final Answer:
The frequency of the wave is 5.0 Hz.
Explanation:
The frequency of a wave is the number of oscillations it makes per second. In this case, the wave oscillates 5.0 times a second, so the frequency is 5.0 Hz. The frequency of a wave is a fundamental characteristic determined by the number of oscillations it completes in one second. This measurement, expressed in hertz, represents the cycles or oscillations per second. It is a crucial parameter in understanding wave behavior and is essential in various fields such as physics, telecommunications, and engineering. The relationship between frequency, speed, and wavelength is described by the wave equation, where frequency and speed are inversely proportional.
Most of the climate changes over the past 650,000yrs are attributed to what happening?
Most of the climate changes over the past 650000 years are attributed to global warming
Explanation:
Global Warming is the rise in the average temperature of the Earth's climate system over a time period. It leads to climate change.
Global warming is mainly caused by man, who by his actions causes an increase in the temperature on Earth.
The main way that he influences this phenomenon is, he is responsible for emission of greenhouse gases like carbon di -oxide , methane and other gases.
This paves way for the sea level rising, Ice in Arctic regions melting, frequent extreme weather conditions.
In some areas there might be abundant rainfall and in other areas there might be drought.
The impact of global warming will be extinction of many species, low crop yield.
Rising sea levels, will have an impact on people living in coastal areas.
So we have to do what we can to slow down the global warming and protect our environment and our Earth.