A 15 cm3 block of gold weighs 2.8 N. It is carefully submerged in a tank of mercury. One cm3 of mercury weighs 0.13 N. a. Will the mercury be displaced by the gold?
b. Will the gold sink or float in the mercury?
Answers
The density of mercury is 0.13/1 = 0.13 units
Since the density of gold is more than density of mercury, it will sink.
Since the gold will sink, it will displace mercury, but less than its own volume
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What is one disadvantage of a series circuit?A. The bulbs in a series circuit will give off more heat then the same bulbs in a parallel circuit.B. If one bulb burns out, then none of the others will light up.C. It is difficult to tell which path an electric charge is following in a series circuitD. Only one bulb can be connected in a series circuit.
Assume that you have 0.480 mol of N2 in a volume of 0.700 L at 300 K . 1. Calculate the pressure in atmospheres using the ideal gas law. 2. Calculate the pressure in atmospheres using the van der Waals equation. For N2 , a=1.35 (L2⋅atm)/mol2 , and b=0.0387 L/mol
analogy
number
experiment
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Answer:
The answer is C.
Explanation:
b. a loop
c. weather
d. climate zones
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Answer:
The answer is B. a loop hopefully this helps!
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Answer:
V solids > V liquids > V gas
Explanation:
Speed of sounds depends of the type of material in which it travels, this phenomenon may be determined by the following formula:
V = √(B/ρ)
Where:
V= speed of sound
B= represent the medium hardness, this coefficient is expressed in Pascal units. The bigger the number, the hardest the material and sound travels faster. This is because in hardest material, particles are closer together so sound travels faster
ρ= density, for this case, for a high density value, sound travels slower
Both factors (B and P) should be considering when calculating the speed of sound
For example, for iron, B has a high value so sound travels faster, but also has a high density (this would make sound travels slower), but for this type of materials, B is much more bigger that P, hence V will be always a high number
Actually : V solids > V liquids > V gas
ρ is also important in certain circumstances, for example, in a gas, when temperature rises, P decreases, for which speed is faster in hot air
Solid medium helps sound waves to travel the fastest since the molecules inside a solid are closer to one another, allowing better transmission.
Explanation:
Talking about the motion of sound waves through the three phases of mediums (solid, liquid and gas), sound waves chose to be the fastest while travelling through the solid media.
Because in solids, the molecules are stacked closely to one another, allowing the transmission of sound waves faster as compared to the liquids or gases. In fact in air, the sound waves find clumsy to travel.
Sound waves travel about 17 times faster in steel than through air. Although there are always some exceptions yet, most of the solids provide better transmission of sound waves as compared to other mediums.
Answers
The kinetic energy of an object varies directly with the square of the speed of an object. The required kinetic energy of the shot is f 162 J.
What is Kinetic Energy?
The energy possessed by an object by its motion is known as the object's kinetic energy. It depends on the speed and mass of the given object.
Given data -
The mass of shot put is, m = 4 kg.
The speed of shot put is, v = 9 m/s.
The mathematical expression for the kinetic energy of the shot put is,
Solving as.
Thus, we can conclude that the required kinetic energy of the shot is of 162 J.
Learn more about the kinetic energy here:
Answer:
We have: K.E. = mv² / 2
here, m = 4 Kg
v = 9 m/s
Substitute their values into the expression:
K.E. = (4)(9)² / 2
K.E. = (4)(81) / 2
K.E. = 324 / 2
K.E. = 162 Joules
Explanation:
In short answer: it would be K.E.=162 Joules
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Period is defined as the time required to complete one cycle which is also related to frequency. Period is presented by an equation P = 1/f where p is the period, and f is the frequency. The unit is in second. Frequency is defined as the number of circular revolutions in a given time interval and it is in Hertz (Hz) = 1s^-1. Velocity s defined as the arc traveled at a given time with the equation v=l/t where v is the velocity, l is the length and t is time. The unit is in m/s.
B) Electrons are added to two negatively charged objects.
C) Two oppositely charged objects are moved farther apart.
D) The charge on two positively charged objects is reduced.
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By definition we have that the electric force is given by:
Where,
k: proportionality constant
q1: electric charge of object 1
q2: electric charge of object 2
d: distance between both objects
Therefore, to increase the electric power there are two possible cases:
1) Add more load to each object
2) Decrease the distance between objects.
The option that increases the electric force for this case is:
Electrons are added to two negatively charged objects.
This is because the values of q1 and q2 increase.
Answer:
A change that increases the electric force between objects is:
B) Electrons are added to two negatively charged objects.
Answer
B) Electrons are added to two negatively charged objects.
Explanation:
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