1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Digiron [165]
3 years ago
9

Marie curie investigation method

Physics
1 answer:
andreev551 [17]3 years ago
5 0

Answer: To isolate the unknown substances, of which only tiny amounts were present, the Curies were the first to use a new method of chemical analysis. They employed various standard (but sometimes demanding) chemical procedures to separate the different substances in pitchblende.

Explanation:

You might be interested in
What would happen if all the powers of government were held by one person or one group of people? Would it be a good thing or a
EastWind [94]

Answer:

it would be a bad thing because if one person controlled the government then there would only be one mind in charge.

Explanation:

8 0
3 years ago
If the photon scatters in the backward direction, what is the magnitude of the linear momentum of the electron just after the co
Strike441 [17]
Momentum is a vector quantity, and is always conserved. Whenever a collision occurs between two objects, the objects behave under the principle of conservation of momentum. Therefore, if an object moves in the direction opposite to its original direction after a collision, then this indicates that the momentum of the colliding object was greater than the object under consideration. 
8 0
3 years ago
What is the power of a machine that pushes with a force of 3 n for a distance of 9 m in 8 s?
dalvyx [7]
The work done by the machine is equal to the product between the force applied and the distance over which the force is applieds, so in this case:
W=Fd=(3 N)(9 m)=27 J

And the power of the machine is equal to the ratio between the work done by the machine and the time taken:
P= \frac{W}{t}= \frac{27 J}{8 s}=3.38 W

4 0
3 years ago
1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed?
bulgar [2K]
Use KE= 1/2mv^2
So... 
50,000=(.5)(1,000)v^2
50,000=500 x v^2
Divide 500 on both sides 
100 = v^2 
Square root both sides to get rid of v^2 
Therefore v = 10 m/s
4 0
3 years ago
Read 2 more answers
. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the. A child drops a ball from a windo
Vsevolod [243]

Answer:

30m/s

Explanation:

  • Use formula for height calculation: Time = √2h/√g
  • From here calculate height which comes out to be: 45m(if g is taken 10)
  • Then use formula for velocity calculation: v = √2gh

  • The velocity comes out to be 30m/s

3 0
3 years ago
Other questions:
  • A human eye is an example of a simple machine found in the human body. True or false
    11·1 answer
  • An isotope of californium-252 undergoes a spontaneous fission, producing cesium-135, 3 neutrons, and one other isotope. a) Deter
    8·1 answer
  • An air bubble has a volume of 1.70 cm³ when it is released by a submarine 115 m below the surface of a lake. What is the volume
    10·1 answer
  • Ariana is accelerating her car at a rate of 4.6 m/s2 for 10 seconds. Her starting velocity was 0 m/s.
    6·1 answer
  • To understand the standard formula for a sinusoidal traveling wave. One formula for a wave with a y displacement (e.g., of a str
    5·1 answer
  • A 2.85 kg fish is attached to the lower end of a vertical spring that has negligible mass and force constant 875 N/m. The spring
    13·1 answer
  • Identify the units NOT used when finding the density?<br><br> 1. Length<br> 2. Volume<br> 3. Mass
    12·2 answers
  • A phonograph turntable rotating at 33 1 3 rev/min slows down and stops in 1.98 min. (Assume the turntable initially rotates in t
    8·1 answer
  • When a narrow laser beam passes through a fine wire mesh before arriving at the wall, it forms a complicated pattern of bright s
    7·1 answer
  • A satellite phone can be used to place a call from virtually anywhere in the world. What type of wave does the satellite phone l
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!