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
sammy [17]
3 years ago
6

A crane raises a crate with a mass of 150 kg to a height of 20 m. Given that

Physics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0

Answer:

P.E=29400J

Explanation:

m=150Kg  h=20m g=9.8ms⁻²

P.E=mgh

P.E=150×9.8×20

P.E=29400J

You might be interested in
Elemental analysis of the unknown gas from part a revealed that it is 30.45% n and 69.55% o by mass. What is the molecular formu
Anna71 [15]

Answer:

the molecular formula for the gas is NO₂

Explanation:

since it contains

Nitrogen = n → 30.45%

Oxygen = o → 69.55%

and 30.45%+69.55% = 100% , then the gas only contains nitrogen and oxygen

Also we know that the proportion of oxygen over nitrogen  is

proportion of oxygen over nitrogen  = moles of oxygen / moles of nitrogen

since

moles = mass / molecular weight

then for a sample of 100 gr of the unknown gas

mass of oxygen = 69.55%*100 gr = 69.55 gr

mass of Nitrogen = 30.45%*100 gr = 30.45 gr

proportion of oxygen over nitrogen = (mass of oxygen/ molecular weight)/(mass of nitrogen / molecular weight of nitrogen ) =  (69.55 gr/ 16 gr/mol) /( 30.45 gr /14 gr/mol) = 1.998 mol of O/ mol of N≈ 2 mol of O/ mol of N

therefore there are 2 atoms of oxygen per atom of nitrogen

thus the molecular formula for the gas is:

NO₂

6 0
3 years ago
The force between two charges, q, and 92, is F. If the distance between the
Sholpan [36]

Answer:

4F

Explanation:

F = kQ₁Q₂/d²

F' = k2Q₁2Q₂/d²

F' = 4(kQ₁Q₂/d²)

F' = 4F

4 0
2 years ago
Which type of radiation travels at the speed of light and penetrates matter easily?
goblinko [34]
The radiation is ultra voilet or Gamma radiation , because their wave length is very short i e 1..0 to 2.5 (angstrom)Ao.
7 0
3 years ago
Read 2 more answers
PLZ HELP FAST! Which two statements help explain why digital storage of data is so reliable?
Shkiper50 [21]

Answer:

C and D

Explanation:

But really, You should be able to answer this with the tech knowledge of a tomato.  You're given four answers, and are to choose which two are explain the reliability of digital storage.

The first two describe bad nasty things, the second two describe beneficial things.

So logically....

3 0
3 years ago
Read 2 more answers
What is the mass, in kilograms, of an avogadro's number of people, if the average mass of a person is 170 lb ?
andre [41]
About 4.7e25 kilograms
8 0
3 years ago
Other questions:
  • Where should a force be applied on a lever arm to produce the most torque
    9·1 answer
  • Two cars travel westward along a straight highway, one at a constant velocity of 85 km/h, and the other at a constant velocity o
    9·1 answer
  • An x-ray photon is scattered by an originally stationary electron. how does the frequency of the scattered photon compare relati
    7·1 answer
  • To be a healthy family, which of the statements below is TRUE:
    11·2 answers
  • A 12 kg block is at rest on a level floor. A 417 g glob of putty is thrown at the block such that it travels horizontally, hits
    7·1 answer
  • Where do most comets in our solar system come from?
    8·2 answers
  • 2 points
    5·2 answers
  • An increase in the atomic number____the atomic radius moving from
    8·1 answer
  • Assume a current of 1 ampere enters a parallel circuit at Point A. This 1 ampere of current will ________________ between Resist
    15·1 answer
  • What is the spring constant if 85.0J of energy is stored when a spring is compressed 0.400m?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!