A pain-relieving pill has a mass of 0. 005 g. Express the pill’s mass in grams using scientific notation or in milligrams.
Answers
the mass of the pill is 5 x 10^-3 g in scientific notation or 5 mg.
A pain-relieving pill has a mass of 0.005 g.
We need to express the pill's mass in grams using scientific notation or in milligrams.
1. In scientific notation:
0.005 g can be expressed in scientific notation as: 5 x 10^-3 g.2.
In milligrams:
1 g = 1000 mg.
Therefore, 0.005 g can be expressed in milligrams as:
0.005 g x 1000 mg/g = 5 mg.
Hence, the mass of the pill is 5 x 10^-3 g in scientific notation or 5 mg.
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Related Questions
A 50Kg girl jumps off a 5-meter-high diving board. What is her kinetic energy right before she hits the water?
Answers
Answer:
2450 J
Explanation:
Given that,
A 50Kg girl jumps off a 5-meter-high diving board.
We need to find the kinetic energy of the girl before she hits the water. At this point the kinetic energy becomes equal to the potential energy such that,
\(K=mgh\\\\K=50\times 9.8\times 5\\\\K=2450\ J\)
So, her kinetic energy right before she hits the water is equal to 2450 J.
A reaction yields 2.5165×108 kJ .
How much mass was lost?
A) 2.300×10−6 kg
B) 5.600×10−6 kg
C) 2.300×10−3 kg
D) 5.600×10−3 kg
Answers
It is important to note that this problem assumes that the entire mass was converted into energy, which is not always the case in real-world scenarios. This concept is a core principle of Einstein's theory of relativity, which revolutionized our understanding of the universe.
This problem highlights the incredible amount of energy that can be produced from a relatively small amount of mass. The equation E=mc² is not just a theoretical concept, but has practical applications in fields such as nuclear energy and particle physics.
A reaction yields 2.5165×10⁶ kJ. So, A) 2.300×10−6 kg mass was lost.
This question involves the use of Einstein's famous equation, E=mc², which relates energy and mass. Rearranging the equation, we get m=E/c², where m is the mass lost, E is the energy released, and c is the speed of light.
Substituting the given values, we get:
\(m = \frac{2.5165 \times 10^8 \, \text{kJ}}{c^2}\)
We can convert kJ to J by multiplying by 1000, and c is approximately 3×10⁸ m/s.
Substituting these values, we get:
\(m = \frac{2.5165 \times 10^{11} \, \text{J}}{9 \times 10^{16} \, \text{m}^2/\text{s}^2}\)
m = 2.7961×10⁻⁶ kg
Therefore, the closest option is A) 2.300×10−6 kg.
It is important to note that the equation E=mc² is only applicable for processes involving the complete conversion of mass into energy, such as nuclear reactions. In other cases, the amount of mass lost may be negligible compared to the total mass involved in the reaction.
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Calculate how many blocks of ice cream each
10 cm long, 10 cm wide and 4 cm thick can
be stored in the compartment of a freezer
measuring 40 cm deep, 40 cm wide and
20 cm high.
Answers
Answer: 80 blocks
Explanation:
Volume of freezer compartment, V1 = (40 X 40 X 20) cm^3
= 32000cm^3
Volume of ice cream block, V2 = (10 X 10 X 4) = 400 cm^3
No of ice cream blocks = V1/V2 = 32000/400 = 80
Which of the following is a learned behavior of a cat
A. Meowing
B. Drinking water
C. Purring when happy
D. Using a litter box
Answers
The answer is D
What constant acceleration is required to increase the speed of a car from 27 mi/h to 53 mi/h in 3s?
Answers
Answer:
8.87 m/s^2
Explanation:
Acceleration is change in velocity over a change in time
27 to 53 = 26 m/s change in velocity
26 m/s / 3 s = 8.87 m /s^2
Kim’s experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added.
Answers
The step of this scientific method is "draw conclusion".
What is scientific method?The scientific method is the process of objectively establishing facts through testing and experimentation.
The basic scientific process or scientific method involves the following;
making an observationforming a hypothesismaking a predictionconducting an experimentanalyzing the results and drawing conclusion.Thus, if Kim’s experiment showed that chicken eggshells were stronger when she gave the hen feed, to which extra calcium had been added. The step of this scientific method is "draw conclusion".
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The question is how do the impulses applied to the two balls compare?
Answers
Given data:
* The force applied on the ball is F = 900 N.
* The time of contact between Bob and the ball is t_1 = 0.3 s.
* The time of contact between Jill and the ball is t_2 = 0.6 s.
Solution:
The impulse applied by the bob is,
\(\begin{gathered} J_1=Ft_1 \\ J_1=900\times0.3 \\ J_1=270\text{ kgm/s} \end{gathered}\)The impulse applied by Jill is,
\(\begin{gathered} J_2=Ft_2 \\ J_2=900\times0.6 \\ J_2=540\text{ kgm/s} \end{gathered}\)Thus, the impulse applied by Jill is more than the impulse applied by Bob.
Hence, 4th option is the correct answer.
Quarks are only inside of protons
Answers
In 1964 Gell Mann and Zweig introduced a baryonic triplet consisting of three hypothetical particles that are termed as Quarks.
The quark model is able to explain many features of elementary particles and gives a good insight into the structure of baryons and mesons.
Quarks are the fermions as the basic building block if we use fermions then we can get fermions and bosons. These bosons are assumed as antiquark pairs.
Actually the three quarks proposed are - up quark (u) , down quark(d), strange quark (s)Quarks and antiquarks have fractional charge . For example u quark ,\(q= e(1/2 +1/2*1/3 +1/2*0)\\=+2/3 e\)Quarks have no internal structure as they are point particles.Hadron like proton is composed of three quarks.Quarks are found in protons but can't say quarks are only found in protons. Because evidently quarks and gluons are basic building blocks of protons as wells as neutrons.To study more about quarks-
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Find the center of mass of the region bounded by y=9-x^2 y=5/2x , and the z-axis. Center of Mass = __?
Note: You can earn partial credit on this problem.
Answers
The centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8). Formulae used to find the centre of mass are as follows:x bar = (1/M)*∫∫∫x*dV, where M is the total mass of the system y bar = (1/M)*∫∫∫y*dVwhere M is the total mass of the system z bar = (1/M)*∫∫∫z*dV, where M is the total mass of the systemThe region bounded by y=9-x^2 and y=5/2x, and the z-axis is shown in the attached figure.
The two curves intersect at (-3, 15/2) and (3, 15/2). Thus, the total mass of the region is given by M = ∫∫ρ*dA, where ρ = density. We can assume ρ = 1 since no density is given.M = ∫[5/2x, 9-x^2]∫[0, x^2+5/2x]dAy bar = (1/M)*∫∫∫y*dVTherefore,y bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]y*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]ydA...[1].
The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore,y bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]y*dxdy...[2].
The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.Substituting the values and evaluating the integral, we get y bar = (1/M)*[(9-5/2)^2/2 - (9-(15/2))^2/2]= (1/M)*(25/2)...[3].
Also, the x coordinate of the center of mass is given by,x bar = (1/M)*∫∫∫x*dVTherefore,x bar = (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]x*dA= (1/M)*∫[5/2x, 9-x^2]∫[0, x^2+5/2x]xdA...[4].
The limits of integration in the above equation are from 5/2x to 9-x^2 for x and from 0 to x^2+5/2x for y.To evaluate the above integral, we need to swap the order of integration. Therefore, x bar = (1/M)*∫[0, 3]∫[5/2, (9-y)^0.5]xy*dxdy...[5].
The limits of integration in the above equation are from 0 to 3 for y and from 5/2 to (9-y)^0.5 for x.
Substituting the values and evaluating the integral, we get x bar = (1/M)*[63/8]= (1/M)*(63/8)...[6]Thus, the centre of mass of the region is bounded by y=9-x^2 y=5/2x, and the z-axis is (3.5, 33/8).
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9. Two different forces (5 N to the right and 7 N to left) are acting on a 5 kg bowling ball. What would the acceleration of the bowling ball be?
I will give you brainlist
Answers
Answer:
0.4m/s² to the left
Explanation:
To solve this problem, we must know that;
Net force = mass x acceleration
Net force is the resultant force on a body that will act like a single force;
Force to left - force to right = mass x acceleration
7 - 5 = 5 x acceleration
2 = 5 x acceleration
Acceleration = \(\frac{2}{5}\) = 0.4m/s² to the left
Cosmologists are scientists who study stars, galaxies, black holes, and other objects in the universe. In order to study the billions and billions of stars, cosmologists use highly advanced telescopes and create computer models to trace the stars’ motion.
What is one type of limitation that requires cosmologists to use these telescopes?
A.money
B.time
C.the size of the system
D.ethical concerns
Answers
Answer:
a
idkdidkdidkdkkdhdksijsnansjnshejdhjsnnebdhhdbsbbshshhsnsjshs
The answer is D, ethical concerns.
Good luck on the Unit Test, fellow edge.nuity user.
A(n) ________________________ is a molecule that is soluble in both polar and nonpolar solvents.
Answers
Answer: ethanol which will dissolve in both water (a polar solvent) and gasoline (a non-polar solvent)
Explanation:
According to the concept of solubility, ethanol is a molecule which is soluble in both polar and non-polar solvents.
What is solubility?
Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.
The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.
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If the distance an object travels and the time it takes to travel the distance are known, which of the following can be calculated?
Answers
Answer:
speed
Explanation:
The distance traveled and time, the average speed of an object can be calculated. The correct answer would be option (A).
What is the average speed?Average speed is defined as the total distance traveled by an object divided by the total time it took to travel that distance. This is a measure of the overall pace of an object's motion over a period of time.
Instantaneous speed is the limit of the average speed as the time interval approaches zero. In other words, it's the rate of change of an object's position with respect to time at a specific moment.
Average acceleration is defined as the change in velocity (speed in a certain direction) divided by the time interval over which that change occurred. This is a measure of the rate of change of an object's speed over a period of time.
Instantaneous acceleration is the limit of the average acceleration as the time interval approaches zero. In other words, it's the rate of change of an object's velocity at a specific moment.
In summary, with the given information of distance traveled and time, the average speed of an object can be calculated, but the instantaneous speed, average acceleration, and instantaneous acceleration cannot be calculated.
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The complete question would be as:
If the distance an object travels and the time it takes to travel the distance are known, which of the following can be calculated?
A. Average speed
B. Instantaneous speed
C. Average acceleration
D. Instantaneous acceleration
A product P is produced from reagents A and B, but unfortunately it can further react with one reagent and degrade at the reaction conditions. The two steps are 1: 2: A + 2B -P 2P +B-X The reaction takes place in liquid phase and B is present in significant excess. The initial concentrations of A and B are, CA = 0.57 mol/L and CB.=55.57 mol/L respectively (there is nothing else in the initial mix). The first step of the reaction is a zero order reaction, while the second step is described by a first order rate at the conditions in the reactor. It is known that at the temperature of operation of 70 °C the two rates are: -11 = = 0.025 mol of A/(L.min) -12 = K2 Cp = 0.0075 CP mol of P/(L.min) a. Determine the net rates of reaction of all components AND the expression for instant selectivity [40 Marks] b. Based on the material balances to a batch reactor that will be used for this reaction, derive the expression with which you can obtain the concentration of P over time. [40 Marks] C. According to the expression you achieved for Co, under which conditions will the desired product P be at its maximum concentration? [20 Marks)
Answers
The net rates of reaction for all components and the expression for instant selectivity are determined. The concentration of P over time in a batch reactor is derived, and the conditions for maximum concentration of P are discussed based on the rate-determining step.
a. The net rate of reaction for component A is given by -11 = -0.025 mol of A/(L.min), as it is a zero order reaction. The net rate of reaction for component P is given by -12 = K2 * Cp = 0.0075 CP mol of P/(L.min), as it is a first order reaction. The net rate of reaction for component B can be calculated by considering the stoichiometry of the two steps.
The instant selectivity is the ratio of the net rate of production of P to the net rate of consumption of A, which can be expressed as selectivity = -12 / -11.
b. Based on material balances for a batch reactor, the rate of change of concentration of P over time (dCp/dt) can be expressed as (dCp/dt) = -2 * (-12) = 0.015 CP mol/(L.min), using the stoichiometry of the reaction.
c. To determine the conditions for maximum concentration of P, we need to consider the rate-determining step. Since the second step is first order, it determines the overall rate of the reaction. To maximize the concentration of P, we need to maximize the rate of the second step. This can be achieved by increasing the concentration of P or the concentration of B while keeping the other reactants at their initial concentrations.
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the process of loking at the differences between two things or ideas with the use of appropriate transition signals
Answers
Ayla hangs a 7.5 kg bowling ball from the ceiling by a rope of negligible mass. The rope will break if the tension in the rope exceeds 115 N. What minimum force must Ayla's dog Rufus exert on the bowling ball to break the rope.
Answers
Answer: >41.5N
Explanation:
Mass of bowling ball = 7.5kg
Breaking point of rope = T > 115N
Where T = Tension on the rope
Since the bowling ball is hung by a rope :
Tension (T) = mg = 7.5 kg × 9.8m/s^2 = 73.5kgm/s^2
T = mg + ma
F = ma
T = mg + F
>115 = 73.5 + F
F = 115 - 73.5
F = 41.5N
Force >41.5N
A child swings a sling with a rock of mass 2.7 kg, in a radius of 1.2. From rest to an angular velocity of 9 rad/s. What is the rotational kinetic energy of the rock?
Answers
A child swings a sling with a rock of mass 2.7 kg, in a radius of 1.2. From rest to an angular velocity of 9 rad/s,the rotational kinetic energy of the rock is 157.464 Joules.
What is rotational kinetic energy?Rotational kinetic energy is the energy an object possesses due to its rotation, calculated as half the product of its moment of inertia and angular velocity squared.
What is angular velocity?Angular velocity is the rate at which an object rotates about a fixed axis, measured in radians per second. It determines the object's rotational speed and direction.
According to the given information:
The rotational kinetic energy (K) of an object can be calculated using the formula K = (1/2) * I * ω^2, where I is the moment of inertia and ω is the angular velocity. For a rock in a sling, the moment of inertia (I) can be calculated as I = m * r^2, where m is the mass of the rock and r is the radius of the circular path.
In this case, the mass of the rock (m) is 2.7 kg, the radius (r) is 1.2 meters, and the angular velocity (ω) is 9 rad/s.
First, calculate the moment of inertia (I):
I = 2.7 kg * (1.2 m)^2 = 2.7 kg * 1.44 m^2 = 3.888 kg m^2
Next, calculate the rotational kinetic energy (K):
K = (1/2) * 3.888 kg m^2 * (9 rad/s)^2 = 0.5 * 3.888 kg m^2 * 81 (rad/s)^2 = 157.464 J
The rotational kinetic energy of the rock is 157.464 Joules.
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Una bola se lanza verticlamente de la parte superior de un edificio con una velocidad inicial 25 m/s la bola impacta al suelo en la base del edificio 7 segundos despues de ser lanzada ¿que altura subio la bola
Answers
Answer:
S = 415.1 meters
Explanation:
Dados los siguientes datos;
Velocidad inicial = 25 m/s
Tiempo, t = 7 segundos
Para encontrar la altura (desplazamiento) de la pelota, usaríamos la segunda ecuación de movimiento;
\( S = ut + \frac {1}{2}at^{2}\)
Dónde;
S representa el desplazamiento o altura medida en metros.
u representa la velocidad inicial medida en metros por segundo.
t representa el tiempo medido en segundos.
a representa la aceleración medida en metros por segundo cuadrado.
Sustituyendo en la ecuación, tenemos;
\( S = 25*7 + \frac {1}{2}*(9.8)*7^{2}\)
\( S = 175 + 4.9*49 \)
\( S = 175 + 240.1 \)
S = 415.1 meters
can someone please answer this, ill give you brainliest and your getting 100 points.
Answers
Answer:
Explanation:
The answer is the layer right under the convection current, C and D. The heat is generated by radioactive decay of heavy elements in the Earth core.
What is the heat source for convection currents in layer E?
O A
O B✓
when earth crust erupts, it forms magma which settle down in the Asthenosphere resulting in heating effect in the mantle .O C
O D
What value of resistor R gives the circuit in the figure a time constant of 22 μs ?
Answers
The value of resistor R that gives the circuit in the figure a time constant of 22 μs is 220 Ω.
The circuit that is in the figure is shown below:Given that time constant (RC) = 22 μs. To find the value of resistor R, we need to use the formula for the time constant:
RC = τ, where R is the resistance and C is the capacitance of the circuit.
Rearranging the above formula, we get:R = τ / C
Where τ is the time constant and C is the capacitance of the circuit.
From the figure, the capacitance is given as 0.1 μF
.Substituting the values of τ and C in the above formula, we get:
R = (22 × 10⁻⁶ s) / (0.1 × 10⁻⁶ F)
R = 220 Ω
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What is a frequency in physics ?
Answers
Answer:
Frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
Explanation:
A bat chasing a moth emits a sequence of three chirps every 0.010 seconds and later hears the echos of the chirps as detailed in the diagram shown. Question: How far away is the moth when the bat hears the third echo? Make sure to explain how you arrived with your answer.
Answers
First, take into account that the difference in time between the third chirp and the third echo is:
t = 0.10s - 0.02s = 0.08s
next, consider that in such a time, the sound emitted by the bat travels twice the distance in between the bat and the moth, then, you have:
2d = v*t
where v is the speed of sound 340 m/s
solve the equation above for d, and replace the values of the previous parameters, as follow:
d = v*t/2
d = (340 m/s)(0.08 s)/2
d = 13.6 m
Hence, the distance between the moth and the bath is 13.6 m
Which wave must have a medium to travel?
A) light wave
B)compression wave
C) electromagnetic wave
D) ultraviolet wave
Answers
Explanation:
light waves because the categorised under mechanical waves
If you float a piece of wood in a container half-full of water that rests on a weighing scale, the weight reading on the scale will
Answers
If you float a piece of wood in a container half-full of water that rests on a weighing scale, the weight reading on the scale will increase.
What is Buoyancy?Buoyancy is the force through your fluids or total or submerged bodies. Also known as Archimedes' theorem. The fluid of the direction on the body produces a resultant force but with the direction of the weight, with the opposite direction, upwards.
All material submerged in a liquid under the action of buoyancy, for this reason we have that the value on the scale will be increased with a system of a wood floating in water.
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A car traveled at an average speed of 65 mph for 10 hours.
How far did it travel?
10 miles
10 miles
65 miles
65 miles
650 miles
650 miles
6,500 miles
Answers
Answer:
650 miles
Explanation:
if car 65mph constant = 1hour = 65 mile x 10 = 650.
A 2.0 kg rock is dropped from a height of 125 m. What is the momentum of the object just before it strikes the ground (Use g=10 m/s2)?
Answers
Answer:
100Ns
Explanation:
find velocity and then plug into momentum formula momentum=(velocity)(mass)
Answer:
5,000 kg-m/s going south
Explanation:
Since you're only given mass and height, not velocity. You have to find velocity first. The equation for velocity is v=2gh. We know gravity is 10 since it's given & height is also given which is 125m. After doing the math, it's 2,500. Now that you have velocity, you can plug velocity into the formula for momentum which is p=mv. 2.0 times 2,500 = 5,000 kg-m/s going south.
A car starting from rest accelerates at a rate of 8m/s what is the final speed at the end of 4 seconds?
Answers
Answer:
vf = 32ms
Explanation:
v = u + a t ,
v = 0 + 8.0 x 4.0
v = 32 ,
v = 32 m /s
Hope it Helps! :D
PLEASE HELP MEEE!!!
In a science experiment showing the splitting of water into Oxygen and hydrogen, two inverted test tubes of water were placed over the site of the reaction. (see the pic) How can you tell which one was catching the oxygen and which one was catching the hydrogen?
A. The hydrogen is a positive ion and will be located close to the negative terminal of the battery.
B. The oxygen is a negative ion which will be located next to the negative terminal of the battery.
C. There are 2 hydrogen atoms for every oxygen atom. The hydrogen will take up more space and is pushing the water lower in the test tube.
D. The hydrogen, being a smaller atom, will take up less space than the oxygen. It will push the water down less.
Answers
Answer:
Option C
Explanation:
Answer C is the correct option. water can be written as H₂O, which means that there are 2 Hydrogen atoms for every oxygen atom, therefore it will occupy more space than oxygen and push more. there is also one more possibility, if the splitting takes place in Hoffman's Voltameter then the Hydrogen will be close to the cathode as hydrogen is positive. Otherwise, option C is correct answer. Hope this Helps you!
Physics question......
Answers
Answer:
I think it is A or B, but more B as for John used 20 more net force. I recommend doing some research, sorry.
Answer:
I think the answer is B, I may be wrong...
Explanation:
Sigh someone stole the points and it marked as an answer so please someone actually answer this.
A 65 kg swimmer jumps off a 10 m tower.
Find the swimmer's velocity on hitting the water.
The swimmer comes to a stop 2 m below the surface. Find the net force exerted by the water.
Answers
Answer:
Hope this solution helps you
