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
Vedmedyk [2.9K]
3 years ago
10

PLEASE HELP I NEED THIS TO PASS THE EIGHTH GRADE AND I ONLY HAVE A COUPLE HOURS LEFT!!!!!!

Physics
1 answer:
zavuch27 [327]3 years ago
7 0

Answer:

the pe at the top of the building: 784 J

the pe halfway through the fall: 392 J

the pe just before hitting the ground: 784 J

Explanation:

Pls brainliest me

I had this question before

You might be interested in
An aluminum cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. A 410 g sample of silver at an initial temperatu
fomenos

Answer:

130.22 g

Explanation:

Parameters given:

Mass of water Mw = 225 g

Mass of stirrer Ms = 40 g

Mass of silver M(S) = 410 g

By applying the law of conservation of energy:

(McCc + MsCs + MwCw)ΔTw = M(S)C(S)ΔT(S)

where Mc = Mass of cup

Cc = Specific heat capacity of aluminium cup = 900 J/gC

Cs = Specific heat capacity of copper stirrer = 387 J/gC

Cw = Specific heat capacity of water = 4186 J/gC

ΔTw = change in temperature of water = 32 - 27 = 5 °C

C(S) = Specific heat capacity of silver = 234 J/gC

ΔT(S) = change in temperature of silver = 88 - 32 = 56 °C

Therefore:

[(Mc * 900) + (40 * 387) + (225 * 4186)] * 5 = 410 * 234 * 56

(900Mc + 957330) * 5 = 5276700

900Mc + 957330 = 5276700 / 5 = 1074528

900Mc = 1074528 - 957330

900Mc = 117198

Mc = 117198/ 900

Mc = 130.22 g

The mass of the cup is 130.22 g.

5 0
3 years ago
Sam travels west for 30 kilometers, then turns south and travels another 45 kilometers. What is Sam's displacement from his orig
Gre4nikov [31]

Answer: C ) 75 kilometers

Explanation: 30 + 45 = 75

7 0
2 years ago
Hey everyone<br><br><br>what is optics??​
lana66690 [7]

Explanation:

Optics is a branch of physics that is the study of light and vision. ... The branch of physics dealing with the nature and properties of electromagnetic energy in the light spectrum and the phenomena of vision. In the broadest sense, optics deals with infrared light, visible light, and ultraviolet light.

7 0
3 years ago
Metamorphic rocks can form from igneous but not from sedimentary rocks. t or f
Vesna [10]
I believe that is true sir
7 0
3 years ago
Read 2 more answers
When a compound, such as salt, dissolves in water, it's said to be:
Lilit [14]

Answer:D:soluble

Explanation:

when a compound such as salt dissolves in water it is said to be soluble

MARK AS BRAINLIEST

5 0
3 years ago
Read 2 more answers
Other questions:
  • Is there more forms of energy of there than :
    12·1 answer
  • What are some important factors to consider when choosing a warm-up before your workout?
    11·2 answers
  • Many galaxies appear to have supermassive black holes in their centers powering active galactic nuclei (also called AGN). The Sc
    6·1 answer
  • Assume that the same amount of current passes through the electromagnets shown. Identify which electromagnet is stronger than th
    7·2 answers
  • Is the acceleration due to gravity in projectile motion always negative? please explain
    7·1 answer
  • AM radio signals use amplitude modulation of the radio waves to transmit a signal. A typical wavelength of an AM radio wave is 3
    7·1 answer
  • A 0.50 kilogram ball is held at a height of 20 meters. What is the kinetic energy of the ball when it reaches halfway after bein
    15·1 answer
  • If 1 foot is 30.28 centimeters.how many cm is 130 feet
    15·1 answer
  • Do all objects fall at the same rate?and if they do not why?
    13·1 answer
  • When magma is cooled, it changes into which of the following?
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!