Consider a situation where you are playing air hockey with a friend. The table shoots small streams of air upward to keep the puck afloat and to reduce friction. The puck moves horizontally due to
The puck moves horizontally in air hockey due to Newton's first law of motion, which states that an object in motion stays in motion unless acted upon by an external force. The streams of air shooting upward on the table minimize friction and keep the puck afloat.
Explanation:The puck moves horizontally in the game of air hockey due to Newton's first law of motion, also known as the law of inertia. According to this law, an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction, unless acted upon by an external force.
When the air is on in the air hockey table, it reduces the friction between the puck and the table, allowing the puck to glide smoothly across the surface. The small streams of air shooting upward help keep the puck afloat and minimize contact with the table.
The downward weight or gravitational force acting on the puck does not affect its horizontal motion because it is balanced by the normal force exerted by the table.
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The usual motion of the planets against the background of stars is_________ to _____ motion.
an airplane starts at rest and accelerates down the run way for 20 s. at the end of the run way, its velocity 80 m/s north whats it acceleration??
A box of mass 50 kg is pushed hard enough to set it in motion across a flat surface. Then a 99-N pushing force is needed to keep the box moving at a constant velocity. What is the coefficient of kinetic friction between the box and the floor? 0.23 0.18 0.20
_____ means to put off exercise.
procrastinate
vigorous activity
physical fitness
skill-related fitness
Answer: Option (a) is the correct answer.
Explanation:
Meaning of procrastinate is to delay or avoid anything in order to not complete a task.
For example, a student procrastinate's him homework by playing with his friends and cousins.
Whereas vigorous activity means to do an activity enthusiastically. Physical fitness means to a person who is physically fit.
On the other hand, skill related fitness means to be able to complete a work with perfection. For example, a woman skilled in embroidery makes beautiful designs on cloths using embroidery threads and needle.
Thus, we can conclude that procrastinate means to put off exercise.
Objects in space __________. question 12 options: require energy to move because they have mass do not require energy to move because there is no gravity stop on their own move on their own
If 9.5 waves break on a beach in 1.0 minute what is the frequency answer
which country is bordered by both ecuador and venezuela
A. colombia
B. guyana
C. french giana
D. suriname
The answer is A.
Columbia is country situated in the northwest of South America. Colombia shares a border to the northwest with Panama, to the east with Venezuela and Brazil and to the south with Ecuador and Peru. Colombian territory also encompasses Pacific coastlines in the west.
the corect answer is a
A 63 kg gymnast climbs 15 m up a vertically hanging rope. He completed the distance in 70 seconds. How much power did his body output to achieve the climb?
Answer:b
Explanation:
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A/an______is a pure substance made of atoms that are all of the same type
1 proton
2 compound
3isotope
4element
A blu-ray disc rotates counterclockwise and speeds up at a constant rate. how does the tangential acceleration of point p compare to the tangential acceleration of point q?
Which statements best describe science? Check all that apply. A)Science uses beliefs and opinions to construct explanations. B)Science is resistant to new information. Science is supported by facts and processes. C)Science involves observation and experimentation. D)Science continually changes and is constantly updated.
Answer:
Science is supported by facts and processes.
Science involves observation and experimentation.
Science continually changes and is constantly updated.
Options A, C, and D are statements best describe science. Another approach to defining science is that it is the information gained through experience.
What is science?Science is knowledge about the physical world and the things that occur within it. It is an objective observation that explains nature's fundamental rules.
The statements best describe science will be;
A)Science is supported by facts and processes.
C) Science involves observation and experimentation.
D) Science continually changes and is constantly updated.
Hence options A, C, and D are statements best describe science.
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A 5 cm object is 18.0 cm from a convex lens, which has a focal length of 10.0 cm.
What is the distance of the image from the lens? Round your answer to three significant figures. ____ cm
What is the height of the image? Round your answer to three significant figures? ____ cm
Answer:
Image distance, v = 22.5 cm
Height of the image, h' = 6.5 cm
Explanation:
It is given that,
Height of the object, h = 5 cm
Object distance, u = -18 cm
Focal length of the lens, f = +10 cm
Using mirror's formula :
[tex]\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}[/tex]
[tex]\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}[/tex]
[tex]\dfrac{1}{v}=\dfrac{1}{10}+\dfrac{1}{(-18)}[/tex]
v = 22.5 cm
Magnification of the lens :
[tex]m=\dfrac{v}{u}=\dfrac{h'}{h}[/tex]
[tex]h'=\dfrac{v}{u}h[/tex]
[tex]h'=\dfrac{22.5\ cm}{-18\ cm}\times 5[/tex]
h' = -6.5 cm
Hence, this is the required solution.
Answer:
22.5 and 6.25
Explanation:
A positively charged ion will bond with
A) a negatively charged ion.
Eliminate
B) a neutral atom.
C) another positively charged ion.
D) nothing else.
Answer: A
A positively charged ion will bond with negatively charged ion. This interaction is called ionic bonds, where ions can form a compound. However, not all compounds are ionic, but each elements on the periodic table is capable of forming an ion. Atoms form ions when they either take up or release electrons in order to fill their outer shell. Positive ions are called cations that are typically metals like copper or sodium. Meanwhile, negatively charged ions are anions, made from nonmetallic elements like oxygen and sulfur.
The answer is A
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What has more inertia: a full water bottle sitting on a desk, or a football player running with the ball?
Final answer:
A football player has much more inertia than a full water bottle because inertia is directly related to an object's mass, and the player's mass is significantly greater than that of the water bottle. This greater mass results in the player's motion being minimally affected when catching the football, illustrating the player's higher level of inertia.
Explanation:
The question of which has more inertia, a full water bottle sitting on a desk or a football player running with the ball, centers around the concept of mass as the quantifiable measure of an object's inertia. Inertia, by definition, is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. An object with more mass has more inertia since it requires more force to change its motion.
Through this lens, the football player has much greater mass compared to a water bottle, hence significantly more inertia. Despite the football having a higher velocity when thrown, the player's mass makes his momentum and inertia far greater. This concept is illustrated when considering the effect on motion during the act of catching: the player's motion is only slightly affected because his greater mass (and thus inertia) absorbs the change with minimal alteration in speed or direction.
This observation aligns with the fundamental principles of momentum which state that momentum (mass times velocity) of an object is directly related to both its mass and velocity. However, in the context of inertia, it is the mass component that is most influential in determining the effect of external forces on an object's motion.
The Sun has a major impact on climate. This can be seen by comparing _____. the East and West coasts tropical and polar climate zones atmospheric and oceanic circulation the North and South poles
Answer: Option (2)
Explanation: Sun plays a vital role in controlling the earth's climatic condition. Our earth is slightly tilted and the incoming solar radiations are directly incident on the equatorial and the tropical region, due to which it experiences a relatively high temperature.
But as we move towards the higher latitude, we observe that the temperature frequently drops down. It is because the radiations from the sun needs to travel a longer path through the atmosphere, which gets scattered or absorbed, thereby making it difficult to reach the poles. So the polar regions are cold enough due to less sunlight.
Therefore, the earth shows maximum temperature at the equatorial region and minimum temperature at the poles.
Jed drops a 18 kg box off of the Eiffel tower. After 6.1 seconds, how fast is the box moving (neglect air resistance.)
A. 1100 m/s
B. 78 m/s
C. 180 m/s
D. 3.3 m/s
E. 60 m/s
Answer:
Speed, v = 60 m/s
Explanation:
Given that,
Mass of the box, m = 18 kg
Time, t = 6.1 seconds
Initially the box is at rest, u = 0
Let v is the final speed of the box i.e. after 6.1 seconds. We can calculate it using first equation of motion as :
[tex]v=u+at[/tex]
Here, a = g
[tex]v=gt[/tex]
[tex]v=9.8\times 6.1[/tex]
v = 59.78 m/s
or
v = 60 m/s
So, after 6.1 seconds, the box is moving with a speed of 60 m/s. Hence, this is the required solution.
8. A 300g mass hangs at the end of a string. A second-string hang from the bottom of that mass and supports a 900g mass. (a) Find the tension in each string when the masses are accelerating upward at 0.700m/s2 . (b) Find the tension in each string when the masses are accelerating downward at 0.700m/s2 .
In a shuffleboard game, the puck slides a total of 12 m before coming to rest. if the coefficient of kinetic friction between the puck and the horizontal board is 0.34, what was the initial speed of the puck?
Which component of earth's motion causes the stars to rise earlier on successive nights?
What is a wavelength of sound wave moving at 340m/s with frequency of 256hz
Imagine that you have a 6.50 l gas tank and a 4.50 l gas tank. you need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. if you fill the larger tank with oxygen to a pressure of 155 atm , to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? assume ideal behavior for all gases. express your answer with the appropriate units.
Given the scenario and assuming ideal gas behavior, to ensure both gases run out at the same time, you should fill the acetylene tank to a pressure of approximately 224 atm.
Explanation:For gases behaving ideally, the pressure, volume, and temperature are related by the Ideal Gas Law (PV = nRT). However, in this problem, we assume temperature and gas constant are the same for both gases. Hence, the amount of gas (in moles) is directly proportional to the product of pressure and volume (PV).
Now you want to calculate the pressure in the acetylene tank that ensures both gases run out at the same time. Since both gas tanks will be opened for the same timeframe, the amounts of each gas in moles used will be the same. Hence, the products of pressure and volume will also be equal for both tanks (PV of oxygen tank = PV of acetylene tank).
In other words, (Pressure of oxygen) x (Volume of oxygen) = (Pressure of acetylene) x (Volume of acetylene). By inserting given values for oxygen (Pressure = 155 atm, Volume = 6.50 L) and the volume of acetylene (4.50 L), you can solve for the pressure in the acetylene tank.
From this equation, Pressure of acetylene = (Pressure of oxygen) x (Volume of oxygen) / (Volume of acetylene) = 155 atm x 6.50 L / 4.50 L = 223.88 atm.
Therefore, to ensure you run out of both gases at the same time, you should fill the acetylene tank to a pressure of approximately 224 atm.
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The acceleration produced by an unbalanced force acting on an object is _____ proportional to the magnitude of the force.
April stands on a flat surface. If she has a mass of 72 kg, what is the normal force acting on her?
Answer: 706
Explanation:
Salt dissolves more quickly in water when the water molecules are moving very quickly. In which of these water samples would salt dissolve most slowly? water at 15°C water at 50°C water at 75°C water at 98°C
The real answer is:
water at 15°C
Answer:
The answer is Water at 15°C
Explanation:
Why does the sample on a microscope slide need to be very thin?
A. so it can fit on the stage of the microscope
B. so light can shine through it from below
C. so it can be seen with a diverging lens
D. so the eyepiece lens can be focused properly
B. so light can shine through it from below.
The sample on a microscope slide need to be very thin because light can shine through it from below.
What are the term thin of microscope?Histology has to do with the study of tissues. Sectioning has to do with cutting very thin slices of objects.
Thus, histological sectioning is an act of cutting very thin slices of tissues for the purpose of mounting such on microscope slides. To enhance views and differentiate different parts of cells, sections of tissues are often stained.
For anything to be seen it must either emit light or reflect light. When you look at the functioning of a microscope you will notice that when you put specimen under the microscope, you need an external light source to illuminate the specimen. For this purpose a light source is placed right under the specimen holder.
For the specimen to be visible clearly the slide is made transparent so that it is backlight by the light and easily visible in the microscope.
Hence, Option B is the correct answer.
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Everyday lifestyle choices affect your physical fitness. Please select the best answer from the choices provided. T F
Answer:
Itzz True me childern
Explanation:
A rocket is launched straight upward with a velocity of 90 m/s. It slows down, reverses direction, and returns to earth. what is the rockets velocity at its highest point above the ground.
a. 0.078 m/s
b. 0 m/s
c. -7.0 m/s
d. 13 m/s
e. -13 m/s
Answer: 0 m/s
The rocket is launched straight upward with a velocity of 90 m/s, At the highest point, the instantaneous velocity would be 0 m/s. The rocket slows down while moving up. The velocity would be 0 m/s at the highest point for an instant and then reverses direction to return on Earth. If it is not controlled, then it would free fall under gravity.
a ferris wheel takes 5 minutes to complete one full rotation, what is the angular velocity of the ferris wheel
Answer:
0.021 rad/s
Explanation:
t = 5 minutes = 5 x 60 = 300 seconds
Time taken to complete one complete round is called time period.
Let the angular velocity is ω.
The relation between angular velocity and the time period is given by
ω = 2 π / T
ω = ( 2 x 3.14 ) / 300 = 0.021 rad/s
The time between high and low tide when the current changes direction is called ____.