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3 years ago

How did Marie Curie’s research in radioactivity benefit others while harming her

1 answer:

5 0

<span>The discoveries Mme Curie made were of great benefit to physics, chemistry and medicine. During the time she was doing her research, the health effects of ionizing radiation were not known. The amount of radiation that she was exposed to led to her death. Even today her notebooks and other personal effects are highly contaminated with radioactive material.
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Find the x-components of this vector: 92.5 m, 32.0 degrees. Remember, angles are measured from the +x axis.

Brrunno [24]

Answer: $78.44\ m$

Explanation:

Given

magnitude of vector $=92.5\ m$

vector makes an angle of $\theta =32^{\circ}$ with x-axis

Vector can be resolved into two components i.e. vertical and horizontal

Horizontal component along x-axis $=92.5\cos 32$

$=78.44\ m$

along the negative x-axis

3 0

3 years ago

a ball slows down as it rolls up hill this is an example of? neutral motion, relative velocity, positive acceleratio, negative a

Zarrin [17]

Answer: negative acceleration

Explanation:

Acceleration is speeding up, the ball is slowing down making it negative acceleration

8 0

3 years ago

Read 2 more answers

A roller coaster car is going over the top of a 18-mm-radius circular rise. At the top of the hill, the passengers "feel light,"

Andre45 [30]

Answer:

0.29713 m/s

Explanation:

m = Mass of person

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity

r = Radius = 18 mm

By balancing the forces in the system we have

$mg-N=\dfrac{mv^2}{r}\\\Rightarrow mg-\dfrac{mg}{2}=\dfrac{mv^2}{r}\\\Rightarrow v=\sqrt{r(g-\dfrac{g}{2})}\\\Rightarrow v=\sqrt{0.018\times (9.81-\dfrac{9.81}{2})}\\\Rightarrow v=0.29713\ m/s$

The velocity of the coaster is 0.29713 m/s

7 0

3 years ago

Distance is 80 seconds is 8 what is the average speed?

True [87]

Answer:

speed =distance /time

speed =80/8

speed =10m/s

8 0

2 years ago

Which of the following is not a part of the modern theory of evolution?

telo118 [61]

Answer:

Explanation:

D) Evolution proceeds in the direction desired by members of a generation is not the modern theory of evolution.

Evolution can not proceed in the direction as desire by the members of the generation as No matter how hard you and your friends wish that your children will be born with the ability to fly unassisted, the kids will have to use airlines like the rest of us. All the rest of these contribute to evolution

5 0

3 years ago