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
LiRa [457]
3 years ago
12

A physicist wants to estimate the rate of emissions of alpha particles from a certain source. He counts 400 emissions in 80 seco

nds. Estimate the rate, in emissions per second and find the uncertainty in this estimate.
Physics
1 answer:
lyudmila [28]3 years ago
7 0

Answer:

Emissions per second = 0.36

Explanation:

Please find the attached question

Solution

Given  

Let X be the rate of background emission.

X = B/t  

Where B = 36

And t = 100

X = 36/100 = 0.36

You might be interested in
30
pickupchik [31]

Answer:

22m/s

Explanation:

lowest part on the graph (closest to x-axis)

4 0
2 years ago
- A thin film of oil * (n = 1.45) on a puddle of water, producing different colors. What is the minimum thickness of a place whe
Darya [45]

Answer:

There will be a phase change at the first interface and no phase change at the second interface:

If the film is 1/4 wavelength thick this restriction will hold

The wavelength of the light in oil is 545 nm / 1.45 = 376 nm

376 nm / 4 = 94 nm

"D" is correct

4 0
3 years ago
A car and a truck collide in an intersection and the merged wreck continues along. During the collision. both kinetic energy and
Vilka [71]

Answer:

C. Momentum is conserved but not kinetic energy.

Explanation:

This case represents an entirely inelastic collision, that is, a collision between the car and the truck that reduces total kinetic energy of the entire system, whereas linear momentum is conserved. Hence, correct answer is C.

5 0
2 years ago
Atmospheric pressure and density at the top of Mount Everest ​
Art [367]

The summit of Mount Everest has an average pressure around 30 kPa. ... A barometer also measures variations in atmospheric pressure. As altitude increases, the air becomes thinner, the density of air decreases, and the pressure of the air decreases as well.

3 0
3 years ago
John added 150 grams of salt to 2.5 liters of water. what is the concentration of the salt solutions​
torisob [31]
Shdnejeiebx ski wiw do
4 0
2 years ago
Other questions:
  • What is the momentum of a 20 kg object traveling at a rate of 5 m/s
    15·1 answer
  • A proton moves along the x-axis in the laboratory with velocity uy = 0.6c. An observer moves with a velocity of v=0.8c along the
    13·1 answer
  • Neglecting the effects of air resistance, explain what the thrower would have to do to catch the ball at the end of the trajecto
    14·1 answer
  • How realistic is the science behind the movie inception
    9·2 answers
  • An operating electric circuit consists of a lamp and a length of nichrome wire connected in series to a 12- volt battery. As the
    6·1 answer
  • The coefficient of friction is a ________ number that represents the resistance to sliding between two __________ in contact wit
    6·2 answers
  • An electric heater works by passing a current of 100 A through a coiled metal wire, making it red hot. If the resistance of the
    11·1 answer
  • A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 6.9 x 1020 m, and the angular spee
    12·1 answer
  • 2. What is the mass of an object if it accelerates at 3 m/s2 and has a force of 1 N?
    13·1 answer
  • Help!! Please!!<br><br> 15 points<br> 15 points
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!