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
Levart [38]
3 years ago
6

An experimenter finds that no photoelectrons are emitted from a particular metal unless the wavelength of light is less than 295

nm. her experiment will require photoelectrons of maximum kinetic energy 2.4 ev. what frequency light should be used to illuminate the metal?
Physics
1 answer:
wariber [46]3 years ago
7 0
If the object, ends up with a positive charge, then it is missing electrons. if it is missing electrons, then it must have been removed form the object during the rubbing process.
You might be interested in
Which statements describe using genetic factors to influence the growth of organisms? Select the three (3) that apply.
Damm [24]

Answer:

- increasing use of hybrid crops

- altering genes in DNA to create new plants

- developing disease or pest resistant crops

Explanation:

The use of genetic factors to influence the growth of a plant encompasses manipulating the genetic constituent (gene) of such plant.

For example,

- Increasing use of hybrid crops entails mating two pure bred plants based on a gene of interest responsible for a particular trait, to form a hybrid.

- Altering genes in DNA to create new plants is also a genetic factor as it has to with gene modification.

- developing disease or pest resistant crops means that the genetic make up of such plant has been modified to be resistant to pest/disease.

6 0
2 years ago
Which two elements define a story's setting?
Archy [21]

Answer:

the plot structure defines a story's setting

6 0
3 years ago
What is the SI unit for momentum?
Whitepunk [10]
Kg . Meter per second (Kg.m/s)
8 0
3 years ago
Read 2 more answers
The water line from the street to my house is 1 inch diameter and made of PVC (i.e. smooth). The line is roughly 450 ft long. Th
jekas [21]

Answer:

The right solution is "126 Psi".

Explanation:

The given values are:

P₁ = 130 psig

i.e.,

   = 130\times 6.894

   = 896.22 \ Kpa

or,

   = 896.22\times 10^3 \ Pa

Z₂ = 10ft

    = 3.05 m

\delta = 1000 kg/m³

According to the question,

Z₁ = 0

V₁ = V₂

As we know,

⇒  \frac{P_1}{\delta_g} +\frac{V_1^2}{2g} +Z_1=\frac{P_2}{\delta_g} +\frac{V_2^2}{2g} +Z_2

On substituting the values, we get

⇒  \frac{P_1}{\delta_g} +0+0=\frac{P_2}{\delta_g} +0+Z_2

⇒  \frac{896.22\times 10^3}{1000\times 9.8} =\frac{P_2}{1000\times 9.8} +3.05

⇒  P_2=866330 \ P_a

i.e.,

⇒       =866330\times 0.000145

⇒       =126 \ Psi

8 0
2 years ago
The angle between magnetic north and the north to which a compass needle points is known as magnetic declination.
Romashka [77]

From among the choices provided, the better choice is the upper-case letter '<em>T </em>'.  That symbol can conveniently be used to represent the words "true" or "truth", which is exactly the reason that it is the better choice for a response, since the complicated statement at the beginning of the question is completely true in its every detail, nuance, jot and tittle.  

7 0
3 years ago
Other questions:
  • Frank gives a box of books a push to the right, which makes it slide across his
    15·1 answer
  • A sound wave travels through water. What best describes the direction of the water particles?
    11·1 answer
  • PLEASE HELP!!!!
    10·1 answer
  • Nerve impulses in the human body travel at a speed of about 100 m/s. A 1.6 m tall man accidentally drops a hammer on his toe. Ho
    12·1 answer
  • Which of the following structure's primary role is to filter lymph?
    7·1 answer
  • Which of the following is the kinetic rate equation for the addition-elimination mechanism of nucleophilic aromatic substitution
    10·1 answer
  • # A cheetah can start from rest and attain the velocity 72km/h in 2 seconds. Calculate the acceleration of cheetah
    11·1 answer
  • Which scientific activities will Juno conduct on its trip to Jupiter? Check all that apply.
    8·2 answers
  • Why is it easier to swim in sea than in a pond or river?​
    6·2 answers
  • Pooping in my room and my room is upstairs and upstairs bathroom upstairs
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!