Answer:Health
Throughout her work with radium, Marie was unaware of the effects of radioactivity exposure on the body. In her lab, she would keep tubes of radium in her pocket. [3] She began to suspect that radium negatively impacted health when one of her fellow researchers died of a blood disease, and then a few years later her personal assistant died of a blood disease. Even though she suspected that radium exposure was bad for her health, she did very little to monitor her own blood. In 1932, she broke her wrist and the break took much longer to heal than it should have. She then began to notice that her vision was deteriorating and radiation burns on her fingers were becoming more and more painful. Some days she felt too ill to even go to the lab, and finally on July 4, 1934, Marie died from aplastic anemia. [1]
Radium Exposure Treatments
Marie suspected that her health was being negatively impacted by radium exposure, but did nothing about it, most likely because there weren't any effective treatments for radium poisoning yet. At the time, scientists knew that radium was metabolized like calcium. In an attempt to remove it from the system, they manipulated calcium intake. [4] This caused little to no improvements, so parathyroid hormone was added to the treatment. Again, there was some reduction of radium, but not a significant amount. It wasn't until after Marie's death that they realized once radium is in the bones, it is extremely difficult to extract. The lack of therapies for radium exposure may explain why Marie just ignored her symptoms, because she was fully aware of her fate. [4]
© Jenna Gray. The author warrants that the work is the author's own and that Stanford University provided no input other than typesetting and referencing guidelines. The author grants permission to copy, distribute and display this work in unaltered form, with attribution to the author, for noncommercial purposes only. All other rights, including commercial rights, are reserved to the author.
Explanation:
Answer:
cause they were dumb
Explanation:
A force of 100 N is applied to a crate at an angle of 60° to the horizontal surface. The force causes the crate to move 2 m across the floor. How much work is done on the crate?
a. 50 J
b. 100 J
c. 200 J
Answer: B 100 J
Explanation: Pic Attached. Hope This Helps.
The radius of wheel is 20 cm & that of axle is 5 cm in a wheel & axle. Calculate the velocity ratio of the machine. please help!!
Answer:
180 cm, what
2. The triangular side walls of a flyover have been used for advertisements. Theses
the walls are 122 m, 22 m and 120 m (see Fig. 12.9). The advertisements a
earning of 5000 per m per year: A company hired one of its walls for 3 months
much rent did it pay
Explanation:
What is the difference between scalar and vector quantity?
Answer: A scalar quantity has magnitude but no particular direction and a vector quantity has magnitude and acts in a particular direction.
Explanation:
Question 6 of 10
What is the frequency of a wave that has a wavelength of 0.20 m and a speed
of 22 m/s?
A. 4.4 Hz
B. 110 Hz
C. 0.23 Hz
D. 0.001 Hz
Answer: Try A. 110 Hz
Explanation:
Answer:
i got 110 Hz..
Explanation:
Here is the picture of an aircraft, with the forces working on it shown. Identify the force that corresponds to the question mark.
A. Buoyancy
B. Atmospheric pressure
C. Gravity
D. Density
The force corresponds to the question mark in the given figure is known as Gravity. Hence, option (C) is correct.
The given problem is based on the concept of equilibrium of forces. The forces that causes the net motion of an object to be zero, is known as equilibrium of force.
In the given problem, the lift of an aircraft will be due to the Buoyant force due to the air as a medium. The drag acting the opposite direction of motion of aircraft, tends to resist the motion. The thrust force acting on the aircraft is due to the component of aircrafts, which causes the aircraft to move forward.And the question mark shown in problem is somehow pointing the gravitational force, which always acts in downward direction. And gravitational force highlights the gravity.Thus, we can conclude that the force corresponds to the question mark in the given figure is known as Gravity. Hence, option (C) is correct.
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Compared to the inertia of a 2.0 kg ball, the inertia of a 4.0 kg ball is
A) Half as great
O B) twice as great
the same
OD) four times as great
Where can I find springs that are the same size as the ones in a mechanical pencil
Answer:
Staples, Bestbuy, Maybe Homedepot
Explanation:
Answer:
find the mechanical pencil on amazon
Explanation:
amazon has everything!
HOPETHIS HELPS!
brailiest? please....
What happens if you cut a bar magnet in half between the north and south poles?
A. one half has a north pole and one half has a south pole
B. Each half is stronger magnet than the original magnet
C. Each half has both a north pole and a south pole
D. The two halves are no longer magnetic
c is the correct answer ......... if we cut a magnet i will divide into two halves and ecah half have a southpole and northpole.
Hope it helps
When a bar magnet is cut in half, each half has both a north pole and a south pole. Therefore, option C is correct.
This phenomenon is due to the rearrangement of magnetic domains within the material. The newly formed magnets will have a north pole on one end and a south pole on the other end. This process can be repeated, resulting in smaller and smaller magnets, but each piece will always exhibit both north and south poles.
The magnetic properties are retained even when the magnet is divided into smaller segments. Each half of the magnet becomes a new magnet with its own north and south pole.
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The path in which the current flows is
A.
Open
B.
Closed
C.
Semi opened
D.
Semi closed
E.
None of the above
Answer:
B. closed
Explanation:
Charges flow through a closed path called a circuit. Current flows because negatively charged particles are attracted to positively charged particles at the other end of the circuit.
Hope this helped, Have a Wonderful Day!!
The Earth's diameter at the poles is _____.
equal to its diameter at the equator
greater than its diameter at the equator
less than its diameter at the equator
Answer:
less than its diameter at the poles
hope this helps. have a great day! :)
In what ways is thermal energy transferred during physical and chemical changes
Explanation:
chemical changes
>produce new substances w/ different chemical structure/ properties
> thermal energy can be used to BREAK bonds (endothermic)
>thermal energy can be transferred to a chem rxn to help form new products (endothermic)
> heat can be released by an exothermic chemical reaction (excess energy- the total energy used to break bonds is less than energy released in forming new bonds)
physical changes
>does not result in new substances (typically changes in state- solid, liquid, gas)
> thermal energy can be transferred to EVAPORATE water (add thermal E... water (liquid) to steam (gas)) or FREEZE water (remove thermal E... water (liquid) to ice (solid))
who wants to be my freind
Meeeeeeeee............!
How does the change in the state of matter occur? Write with example
Answer:
When matter changes from one state to another, it either absorbs energy—as when chocolate melts—or loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid again.
Explanation:
hope it helps u
How does temperature influence chemical change
Answer:
yes
Explanation: if temperature is higher the reactants have more kinetic energy make the chemical reaction faster
Answer:
increasing the temperature will cause chemical changes to occur faster
Decreasing the temperature, causes the particle to lose energy which causes them to move around less and slower
Can someone please help. I need to turn it in soon. Thanks.
What simple machines are in a remote controlled drone helicopter?
Answer:
The machines included in a remote controlled drone helicopter are:
Brushless MotorsBluetooth device connectorBatteriessmall Camera(if needed)LCD Flight control board9) Zane has an elastic water balloon launcher that can fire balloons at an angle of [38.0o] from the surface of the ground. If the initial velocity is 25.0 m/s, find how far away are the balloons are from the launcher when they hit the level ground again.
Answer:
127.6 m
Explanation:
Given that Zane has an elastic water balloon launcher that can fire balloons at an angle of [38.0o] from the surface of the ground. If the initial velocity is 25.0 m/s,
The horizontal initial velocity will be:
U = 25cos38
U = 19.7 m/s
To find how far away are the balloons are from the launcher when they hit the level ground again, we will first calculate the total time spent before using the range formula
To calculate the total time, let's use the formula below:
T = 2U/g
T = (2 × 25)/9.8
T = 50/9.8
T = 5.1s
Range = UT
Since horizontal acceleration = 0
Range = 25 × 5.1
Range = 127.55 m
Therefore, the balloons are approximately 127.6m away from the launcher when they hit the level ground again
A bus goes from rest to 20 m/s. The bus accelerates at 2 m/s^2. How far does the bus go?
What is the mass of a dog running at a speed of 5 m/s and a momentum of 120.5 kgm/s?
Given:
Momentum of the dog (p) = 120.5 kg m/s
Speed of the dog (v) = 5 m/s
To Find:
Mass of the dog (m)
Concept/Theory:
[tex] \underline{\underline{ \bf{\Large{Momentum}}}}[/tex]
It is defined as the quantity of motion contained in a body.It is measured as the product of mass of the body and it's speed.It is represented by p.It's SI unit is kg m/sMathematical Representation/Equation of Momentum: [tex] \boxed{ \bf{p = mv}}[/tex]Answer:
By using equation of momentum, we get:
[tex] \rm \longrightarrow m = \dfrac{p}{v} \\ \\ \rm \longrightarrow m = \dfrac{120.5}{5} \\ \\ \rm \longrightarrow m = 24.1 \: kg[/tex]
[tex] \therefore [/tex] Mass of the dog (m) = 24.1 kg
An object needs a force of 152 Newtrons to move 8 meters. How much work is required?
Answer:
960J
Explanation:
Given parameters:
Force = 120N
Distance = 8m
Unknown:
Work required = ?
Solution:
The work done by a body is the force applied to move a body in a specific direction.
Work done = Force x distance
Insert the parameters and solve;
Work done = 120 x 8 = 960J
Place the items in the correct order when they occur from 1 to 5.
A. Erosion of rock
B. Particles settle out and form layers
C. Humans analyze formations to determine the age of rock
D. Sediments are distributed by river to a new location
E. Fossils form as living things are trapped in the layers
Explanation:
A. Erosion of rock
D. Sediments are distributed by river to a new location
B. Particles settle out and form layers
E. Fossils form as living things are trapped in the layers
C. Humans analyze formations to determine the age of rock
The steps given are keys which ensures we understand how sediments form sequentially in basin of deposition. Coupled with this, we are shown a peep into the world of fossilization.
Any form of rock is first eroded before they are transported to their basins of deposition. In the basin, the particles settle out and form layers. The fossils trapped in them also settles out. The sediments gets compacted to sedimentary rocks. This sequence is therefore analyzed to determine the age of a rock.A bicycle of mass m requires 50 J of work to move from rest to a final speed v. If the same amount of work is performed during the same amount of time on a bicycle with a mass of 2m, what is the final speed of the second bicycle?
Answer:
The final speed of the second bicycle is (v·√2)/2
Explanation:
The mass of the given bicycle = m
The amount of work required to move the bicycle from rest to speed v = 50 J
The final speed of the first bicycle = v
The mass of the second bicycle = 2m
Therefore, from conservation of energy, we have;
Work required by the first bicycle = Kinetic energy gained by the bicycle
The kinetic energy = 1/2·m·v²
∴ Energy required by the first bicycle = 50 J = 1/2·m·v²
Given that the same amount of work is performed on the second bicycle, we have;
Work performed on the second bicycle = 50 J = kinetic energy of second bicycle = 1/2·(2·m)·v₂²
Also, given that 50 J = 1/2·m·v², we have;
Work performed on the second bicycle = 50 J = 1/2·m·v²= 1/2·(2·m)·v₂²
1/2·m·v²= 1/2·(2·m)·v₂²
m·v² = 2·m·v₂²
v² = 2·v₂²
v₂ = √(v²/2) = v/√2 = (v·√2)/2
v₂ = (v·√2)/2
The final speed of the second bicycle = v₂ = (v·√2)/2.
The energy stored inside a battery is best described as...
a. potential energy
b. Elastic
c. Mechanical
d. Kinetic
Answer:
potential energy
Explanation:
by the sun
A wave has a wavelength of 45 meters and a period of 9.0 seconds. What is the frequency of the wave?
405 Hz
5.0 Hz
5.0 m/s
0.11 Hz
Answer:405
Explanation:Multiply 45x9.0=405
Answer:
405 Hz
Explanation:
Give the person on top Brainly
which component acts a platform on which an application software runs.
Answer:
System software acts as a platform on which an application software program runs.
When lifting weights, arch your lower back for extra strength. Is this true?
Answer:
No
Explanation:
why the unit of power is called derived unit?
Do you think the government should ever get involved in limiting population? Why or why not?
Answer:
No!!
Explanation: I think the government shouldn't get involved with limiting population!! i think that as long as you can care and supply your family it is your choice how larger your family is!
A person or object may have stored energy because of its
Answer:
A person or object may have stored energy because of its....
potential energy
A person or object may have stored energy because of its position and the energy is called potential energy.
What is potential energy?The relative positions of different system components determine the potential energy, which is stored energy. When a spring is compressed or stretched, its potential energy increases.
If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised.
Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the elevated ball has more potential energy as they become further apart.
In systems having components whose forces on one another rely on their configuration, or relative positions to one another, potential energy is generated.
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Which of these structures is the most superior?
the mouth
the adam's apple
the belly button
the nose