a piece of cork has a mass of 15 g in air and a specific gravity of 0.25. the cork is attached to a lead sinker whose mass is 230 g in air. what will be the apparent mass of the pair when they are both submerged in water?
Answers
With a piece of cork connected, which has a mass of 15 g in air and a specific gravity of 0.25, the pair weighs 164.736 grammes when they are both submerged in water.
A physical body's mass is its total amount of matter. Inertia, or the body's resistance to acceleration (change of velocity) when a net force is applied, is also measured by this property. The gravitational pull an object has on other bodies is also influenced by its mass. A substance will float on water if its specific gravity is less than 1. sp gr, or specific gravity, is a common abbreviation. The following formula represents specific gravity, which is also known as relative density: Substance formula: substance / reference The purpose of comparing densities
60 grammes of water are equal to 15 grammes of cork when divided by 15.25. Lead's specific gravity is 11.35; its mass is (230+15)-(60+20.264); and its mass is 245 - (80.264) grammes.
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Related Questions
What are the disadvantages of mountaintop removal?
Answers
The environment may be harmed. People are put at danger of their health and safety. Drinking water is contaminated by toxic heavy metals including cadmium, selenium, and arsenic that seep into local water systems. Mountaintop-removal mining, a harmful practise that releases carcinogenic chemicals like silica into the air and has an impact on populations kilometres away.
Surface mining at a mountain's peak or summit ridge is known as mountaintop removal mining (MTR), often referred to as mountaintop mining (MTM). A mountain's coal seams are removed by clearing the ground, or overburden, above the seams. Because the coal seams are reached from above rather than beneath, this approach is seen to be safer than underground mining. In the eastern part of the United States, in the Appalachian Mountains, coal is mined using this technique.
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what is the direction of the current, clockwise or counter-<:lockwise, that needs to flow in orderto lift the ball up along the z direction?
Answers
The magnetic field created by the current and the direction of the magnetic field relative to the direction of the magnetic force on the ball determine the direction of the current that must flow in order to lift the ball up along the z direction.
What is current?A stream of charged particles, such as electrons or ions, traveling through an electrical conductor or space is referred to as an electric current. The net rate of passage of electric charge through a surface or into a control container is monitored. Electric current refers to the flow of electricity in an electrical circuit as well as the amount of electricity flowing through a circuit. It is measured in amperes (A). The higher the ampere value, the more electricity flows across the circuit.
Here,
The direction of the current is often determined by applying the right-hand rule to the magnetic field and the direction of the force on the conductor. However, without further information on the intricacies of the arrangement and the exact orientation of the magnetic field, determining the exact direction of the current is impossible.
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Which word best completes the sentence?
Select the word from the drop-down menu.
Despite the _____ of growing up in poverty, he went on to become a successful concert pianist.
A. Technique
B. Hope
C. Menace
D. Tribulations
Answers
Answer:
Tribulations
Explanation:
I took the test and tribulations is the answer that makes the most sense
In general as objects heat up, what happens to them?
Answers
Heat is a form of energy.
When heat is provided to any object, the molecules, and atoms of the object gain heat energy.
This energy results in an increase of kinetic energy of the molecules, which vibrate faster with more speed.
If more amount of heat is provided to the object, this results in the breaking of intermolecular forces, and the object changes its state(from solid to liquid).
Thus, objects when heated up gain energy which increases the internal energy of the object.
3. from your observations, what can you conclude about the polarity of the compass; specifically, what is the polarity of the red end ( "north" or "south" ) and the white end of the compass?
Answers
The red end of the compass points towards the Earth's magnetic north pole (polarity: "north"), while the white end points towards the Earth's magnetic south pole (polarity: "south").
Based on observations, the polarity of the compass needle can be determined by its response to Earth's magnetic field. The red end of the compass needle is typically marked as the north-seeking end, indicating that it points towards the Earth's magnetic north pole. Conversely, the white end of the compass needle is considered the south-seeking end, indicating that it aligns with the Earth's magnetic south pole.
The Earth has a magnetic field that is generated by the movement of molten iron in its outer core. This magnetic field creates an invisible force that aligns magnetic objects, such as compass needles, with the Earth's magnetic field lines. The Earth's magnetic north pole is located near the geographic North Pole, but it is important to note that the magnetic and geographic poles do not coincide.
When a compass is placed on a level surface, the needle aligns itself parallel to the Earth's magnetic field, with the red end pointing towards the magnetic north pole and the white end pointing towards the magnetic south pole. This alignment allows the compass to be used as a navigational tool, helping determine directions such as north, south, east, and west.
It's worth mentioning that while the red end of the compass is conventionally marked as north, the actual color of the needle can vary among different compass designs. The key is to understand the polarity of the needle, where the end pointing north indicates the magnetic north pole and the opposite end indicates the magnetic south pole.
In summary, the observations of a compass indicate that the red end points towards the Earth's magnetic north pole, representing a polarity of "north," while the white end points towards the Earth's magnetic south pole, representing a polarity of "south."
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Question 3
A stone weighing 5 newtons falls freely from a cliff 44 meters
high. The stone is accelerated at approximately
А 5 m/sec2
C 44 m/sec
B 10 m/sec2
D 220 m/sec
Answers
Based on scientific data, the stone is accelerated at approximately 10 \(m/s^2\).
Given the following data:
Weight = 5 NewtonHeight = 44 meters.What is gravity?Gravity can be defined as a force of attraction that controls the movement of the planets such as Earth around the Sun.
This ultimately implies that, gravity is a universal force of attraction that acts between all objects or matter that are having both mass and energy, and can occupy space.
Gravity on planet EarthFurthermore, the gravity near the Earth's surface generally makes it possible for all physical objects such as stones to possess weight and experience a free fall.
According to astronomical records, the acceleration due to gravity for an object experiencing a free fall near the Earth's surface is 9.8 \(m/s^2\).
In this scenario, the stone is accelerated at approximately 10 \(m/s^2\).
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The Great Salt Lake is located in __________.
A.
Mississippi
B.
Arizona
C.
Florida
D.
Utah
Answers
Answer:
D
Explanation:
Also the capitol of Utah is Salt Lake City
Hope this helps!
Answer:
Utah
Explanation:
The Great Salt Lake, located in the northern part of the U.S. state of Utah, is the largest salt water lake in the Western Hemisphere, and the eighth-largest terminal lake in the world.
Using techniques similar to the aluminum foil lab, how could you do an experiment to determine the volume of the filled soda bottle? What factors might limit the accuracy of your experiment?
Answers
Answer:
applications of density measurements. The densities of brass and aluminum will be calculated from mass and volume measurements.
Explanation:
What does this tell you about the direction and magnitude of the acceleration acting on the cannonball throughout its duration of flight?
Answers
Answer:
Direction remains the same but velocity changes.
Explanation:
This tell us about the direction and magnitude of the acceleration acting on the cannonball throughout its duration of flight that its direction remains the same but its magnitude of the acceleration is continuously changing. The cannonball moves in the direction in which the cannon was fired while the velocity is highest after the fire but decreases when goes higher and when it comes back to the ground so its velocity increases against so we can say that both positive and negative acceleration occurs. Positive acceleration means increase in the magnitude of velocity whereas negative acceleration means decrease in velocity.
suppose that you're driving down the highway and a moth crashes into the windshield of your car. which undergoes the greater force during the collision
Answers
Answer:
See below
Explanation:
The windshield and the moth experience equal but opposite forces. (The magnitudes are the same)
My Dad used to say "I'll bet he doesn't have the guts to do THAT again!"
Based on its location on the periodic table, which metal is likely to be less reactive than rubidium and more reactive than calcium?
a) potassium (K)
b) cesium (Cs)
c) magnesium (Mg)
d) titanium (Ti)
Answers
Answer:
A i think tell me if i got it right
Explanation:
Based on the location on the periodic table, Potassium (K) is the metal that will be less reactive than rubidium and more reactive than calcium.
two motorcycles are traveling due east with different velocities. however, 2.10 seconds later, they have the same velocity. during this 2.10-second interval, motorcycle a has an average acceleration of 1.90 m/s2 due east, while motorcycle b has an average acceleration of 17.8 m/s2 due east. (a) by how much did the speeds differ at the beginning of the 2.10-second interval, and (b) which motorcycle was moving faster? (a)
Answers
The difference in speeds at the beginning of the 2.10-second interval was 35.49 m/s. Motorcycle B was moving faster.
The problem requires us to find the difference in speeds of two motorcycles that were traveling due east. We are also given their accelerations. The first step is to identify all the known quantities in the problem:
(i) The acceleration of motorcycle A = 1.90 m/s²
(ii) The acceleration of motorcycle B = 17.8 m/s²
(iii) The time interval = 2.10 s
We can use the following kinematic equations to solve for the initial velocity of each motorcycle:
For motorcycle A, we have
v = u + at
Where, v is the final velocity of the motorcycle, u is the initial velocity, a is the acceleration of the motorcycle, t is the time taken.
The final velocity of motorcycle A is the same as the final velocity of motorcycle B. This means that their speeds were equal after 2.10 seconds. Thus:
vA + 1.90 × 2.10 = vB
Let the initial velocity of motorcycle A be uA and the initial velocity of motorcycle B be uB. Thus:
uA + 1.90 × 2.10 = uB
For motorcycle B, we have
v = u + at,
Where, v is the final velocity of the motorcycle, u is the initial velocity, a is the acceleration of the motorcycle, t is the time taken
The final velocity of motorcycle A is the same as the final velocity of motorcycle B. This means that their speeds were equal after 2.10 seconds. Thus:
vA = vB = v
Let the initial velocity of motorcycle A be uA and the initial velocity of motorcycle B be uB. Thus:
v = uB + 17.8 × 2.10
We can now substitute for v in the first equation to get:
uA + 1.90 × 2.10 = uB + 17.8 × 2.10
uA - uB = 16.9 × 2.10
uA - uB = 35.49
Hence, the speeds differ by 35.49 m/s at the beginning of the 2.10-second interval.
Motorcycle B was moving faster.
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For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.50-mm-long, 0.460 mg flea can reach a height of 15.0 cm in a single leap. a) Calculate the kinetic energy per kilogram of mass. b) If a 79.0 kg, 2.00-m-tall human could jump to the same height compared with his length as the flea jumps compared with its length, how high could the human jump
Answers
Answer:
1.47 J/kg
120 m
Explanation:
The maximum height it can jump in a single leap 15 cm, = 0.15 m
to get the kinetic energy per kg of mass, we need to find the takeoff speed. The take off speed can be calculated by using the formula
v = \(\sqrt{2gh}\)
where h = 0.15
v = \(\sqrt{2 * 9.81 * 0.15}\)
v = \(\sqrt{2.94}\)
v = 1.715 m/s
energy per kg of mass =
1/2 * (1.715) = 1.47 J/Kg
TJe height a human can jump when compared to the flea is
2 m/2.5 mm * 15 cm =
2/0.0025 *0.15 =
800 * 0.15 = 120 m
draw a figure of a simple pendulum explain its amplitude and effective length ?
Answers
Answer:
Explanation:
A simple pendulum consists of a mass (usually represented as a small object or bob) attached to a string or rod of negligible mass. The mass is free to swing back and forth under the influence of gravity.
In the figure, the point of suspension is denoted by "O," and the mass (bob) is represented by the small circle. The string or rod is represented by the vertical line connecting the point of suspension to the bob.
Amplitude:
The amplitude of a pendulum refers to the maximum displacement or swing of the bob from its equilibrium position. In the figure, the amplitude can be represented by the angle formed between the vertical position and the position of the bob when it swings to its maximum distance on one side. It is usually denoted by the symbol "A."
Effective Length:
The effective length of a pendulum refers to the distance from the point of suspension to the center of mass of the bob. It represents the distance over which the mass swings back and forth. In the figure, the effective length can be measured as the length of the string or rod from the point of suspension to the center of the bob. It is usually denoted by the symbol "L."
It is important to note that the amplitude and effective length of a simple pendulum affect its period of oscillation (the time taken for one complete swing). The relationship between these parameters and the period can be described by mathematical formulas.
Overall, the simple pendulum is a fundamental concept in physics and provides a simplified model for understanding oscillatory motion and the principles of periodic motion.
A condition that lifts a parcel of air to form cumulus clouds is
Answer
a. differential heating.
b. mountain barriers.
c. a cold front.
d. All of the above.
Answers
A condition that lifts a parcel of air to form cumulus clouds is differential heating.
Thus, Differential heating of the land and the water. Water changes temperature more slowly because it has a high specific heat, like the ocean. Land, particularly sandy beaches, has a low specific heat, therefore it warms up faster than water with the same amount of heat.
Our beach towels are blown away by this land-and-water combination, but it is also to blame for more extreme weather like monsoons and thunderstorms and heat.
The typical afternoon thunderstorm might be produced by sea breezes. For instance, the Florida peninsula is bordered by the ocean on both sides. Cool air from the Gulf of Mexico blows inland on the western side as a sea breeze. A sea wind from the Atlantic Ocean causes the same thing to occur on the eastern side and differential heating.
Thus, A condition that lifts a parcel of air to form cumulus clouds is differential heating.
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What is needed in a market for a good to be considered elastic?
Answers
If the amount demand of a product changes more than proportionally as its price rises or falls, then it is said to be elastic.
How is a market made elastic?The more replacements there are for an item, more elastic the good is, according to definition of an elastic good, which is where change in price results in a large movement in demand. Price elasticity of demand is determined by dividing percentage change in quantity required by the percentage change in price.
Products like cars, appliances, and luxury items that are rarely purchased are examples of elastic commodities. In the event that the cost of these products is momentarily high, consumers may decide to put off buying.
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A 70-kg skier leaves a ski jump at a velocity of 14m/s. What is the skier's momentum at that instant?
a. 5 Nos
c. 980 Nos
b. 50 Nos
d. 9800 Nos
Answers
Answer: 980 N*s
Explanation:
an airplane flying at 115 m/s due east makes a gradual turn following a circular path to fly south. the turn takes 15 seconds to complete. reference: ref 5-7 what is the radius of the curve that the plane follows in making the turn?
Answers
The radius of the curve that the plane follows in making the turn is approximately 275.87 meters.
How to find radius?To find the radius of the curve that the plane follows in making the turn, use the relationship between the speed, radius, and time for an object moving in a circular path.
Given:
Velocity of the airplane (v) = 115 m/s
Time taken to complete the turn (t) = 15 seconds
The formula to calculate the radius (r) of the curve is:
r = v × t / (2 × π)
Substituting the given values into the formula:
r = 115 m/s × 15 s / (2 × π)
Calculating the value:
r ≈ 115 × 15 / (2 × 3.14159)
r ≈ 115 × 15 / 6.28318
r ≈ 275.8686 meters
Therefore, the radius of the curve that the plane follows in making the turn is approximately 275.87 meters.
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Could someone please explain isotopes, and what they do/are? If not thats fine, thank you
Answers
Answer:
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
"some elements have only one stable isotope"
Explanation:
there ya go! Pls give me brainliest!
Let each shake of the pennies or thumbtacks represent 1 year. what is the half life, in years, for the pennies in experiment 1? what is the half-life, in years, for the thumbtacks in experiment 2?
(5.4.3 lab - nuclear physics)
Answers
The half-life of the pennies in experiment 1 and 2 will be the time it takes for half the pennies to fall off after shaking.
What is Half-Life?Half-Life is the time required for half the amount one a given substance to disappear or decay.
The half-lives of substances are usually constant values.
For example, the Half-Life of radioactive carbon-14 is 5700 years.
Therefore, the half-life of the pennies in experiment one and two will be the time it takes for half the pennies to fall off after shaking.
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You must park at least _____ away from a fire hydrant.
Answers
Answer: at least 10 feet away
Explanation:
In a circus act, when the tumbling lever is measured, the measurements show that the effort arm is 8 meters long and the resistance arm is 2 meters long. The mechanical advantage of the lever is 16. True or False
Answers
The statement the mechanical advantage of the lever is 16 is False.
Mechanical Advantage
Mechanical advantage MA = d/D where
d = distance moved by effort and D = distance moved by loadGiven that the effort arm is 8 meters long, d = distance moved by effort = 8 m.
Also, given that the resistance arm is 2 meters long, D = distance moved by load = 2 m.
Calculating the mechanical advantageSo, substituting the values of the variables into the equation, we have
MA = d/D
MA = 8 m/2 m
MA = 4
Since MA = 4, so, the stament is False.
So, the statement the mechanical advantage of the lever is 16 is False.
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Someone please help will mark as brainliest
Answers
A car is driving at 44 m/s and slows down to 29 m/s over a period of 10 seconds. What is its acceleration?
Answers
Answer:
it b
Explanation:
determine the number of significant figures in 00.6022009
Answers
The number of significant figures in 00.6022009 is 7 .
The number of significant figures is 7.
Explanation:
Significant figures
The figures in a number that expresses the magnitude of a quantity to a specific degree of accuracy are known as significant digits.Digits from 1 to 9 are always significant and have an infinite number of significant figures.All non-zero numbers are always significant. For example, 684, 9.54, and 63.4 all have three significant figures.All zero’s between integers are always significant. For example, 2005, 8.005, and 10.05 all have four significant figures.All zero’s preceding the first integers are not significant. For example, 0.0038 has two significant figures.All zero’s after the decimal point are always significant. For example, 4.500, 43.00, and 950.0 all have four significant figures.All zeroes used solely for spacing the decimal point are not significant. For example, 6000 has one significant figure.Given :
The number 00.6022009
To find:
The number of significant figures in the number.
Solution
00.6022009
All zero’s preceding the first integers are not significant.
Zeros in between the integers are significant
So, the number of significant figures is 7.
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A student is using a 68 ohm resistor to build a circuit with a voltage source. If the student
needs 0.72 amperes of current to flow through the resistor, what voltage should be used?
Answers
Answer:
48.96V
Explanation:
Given parameters:
Resistance = 68Ω
Current = 0.72A
Unknown:
Voltage = ?
Solution:
According to ohm's law;
V = IR
V is the voltage
I is the current
R is the resistance
Now insert the parameters and solve;
V = 68 x 0.72 = 48.96V
Newton would agree that all objects on Earth exert a
gravitational pull on Earth.
TRUE
FALSE
Is true
Answers
Answer:
pretty sure it's true....
a wrench cm long lies along the positive -axis and grips a bolt at the origin. a force is applied in the direction at the end of the wrench. find the magnitude of the force needed to supply of torque to the bolt.
Answers
A 30 cm long wrench is positioned at the origin, along the positive y-axis, and is holding a bolt. Just at end of the wrench, a force is exerted in the direction of "0, 3, and 4"
What does force in physics mean?
You can also use words like extend and squeeze to describe force. Force is described in physics as the pull or push that causes a massed object to change its speed. Force is an outside agent that has the power to alter a body's resting or moving position.
What function does force serve?
For instance, if there is no opposition, force is defined as the interaction that modifies an object's motion. When we look attentively at this sentence, we can see how push-pull plays a part in it. A pull is defined as a force that causes an object to move closer to you. On the other side, it is a shove if it travels away.
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A toy boat moves horizontally in a pond. The horizontal position of the boat in meters over time is shown below. What is the displacement of the boat between 0s and 16s? What is the distance traveled by the boat between 0s and 16s?
Answers
Answer:
displacement=-21
distance=39
Explanation:
Describe the relationship between frequency and wavelength.
Answers
Answer:
frequency is equal to the wavelength multiply by the speed of light
Explanation:
wavelength multiply by the speed of light Will give you the frequency