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
Jobisdone [24]
2 years ago
12

The first hill of a roller coaster is 42.0 meters high. The bottom of the first hill is 4.2 meters off the ground.The roller coa

ster cart has a mass of 4500 kg.
Calculate its potential energy at the top of the first hill.





Calculate its potential energy at the bottom of the first hill.





Challenge- What is the velocity of the cart at the bottom of the first hill?
Physics
1 answer:
Karolina [17]2 years ago
7 0

Answer:

1.89*10⁶J

Explanation:

because 4500kg * 42m*10m/s² is 1890000J

You might be interested in
) A 1000 kg car travelling at 50 m/s slams into a 1500 kg parked truck in an inelastic manner as
solmaris [256]

(a)

KE = m v^2 / 2 = (1200 kg)(20 m/s)^2 / 2 = 240,000 J


(b)

The energy is entirely dissipated by the force of friction in the brake system.


(c)

W = delta KE = KEf - KEi = (0 - 240,000) J = -240,000 J



(d)

Fd = delta KE

F = (delta KE) / d = (-240,000 J) / (50 m) = -4800 N

The magnitude of the friction force is 4800 N.
8 0
3 years ago
A quantum well is a region of semiconductor or metal film that confines particles to a small region, resulting in quantized ener
murzikaleks [220]

Answer:

226.2 m/sec

Explanation:

We have given \Delta x=510nm=510\times 106{-9}m

The plank's constant h=6.67\times 10^{-34}

Mass of electron m=9.11\times 10^{-31}kg

Now according to Heisenberg uncertainty principle \Delta v\geq \frac{h}{2\pi m\Delta x}

So \Delta v\geq \frac{6.6\times 10^{-34}}{2\times 3.14\times 9.11\times 10^{-31}\times 510\times 10^{-9}}=226.2m/sec  

5 0
2 years ago
PLEASE HELP! I'LL GIVE BRAINLEST​
DochEvi [55]

Answer:

1.62 m/s²

Explanation:

4 0
2 years ago
A tall cylinder contains 30 cm of water. oil is carefully poured into the cylinder, where it floats on top of the water, until t
Art [367]

The total gauge pressure at the bottom of the cylinder would simply be the sum of the pressure exerted by water and pressure exerted by the oil.

The formula for calculating pressure in a column is:

P = ρ g h

Where,

P = gauge pressure

ρ = density of the liquid

g = gravitational acceleration

h = height of liquid

Adding the two pressures will give the total:

P total = (ρ g h)_water + (ρ g h)_oil

P total = (1000 kg / m^3) (9.8 m / s^2) (0.30 m) + (900 kg / m^3) (9.8 m / s^2) (0.4 - 0.30 m)

P total = 2940 Pa + 882 Pa

P total = 3,822 Pa

 

Answer:

 The total gauge pressure at the bottom is 3,822 Pa.

6 0
2 years ago
Read 2 more answers
Can yall answer this? (for class) whats the diffrentce between drug addict and acoholic?
lora16 [44]

Answer:none

Explanation:

8 0
3 years ago
Other questions:
  • Predict what the MASS would be of something exerting a force of 45N on a spring scale. EXPLAIN how you got
    15·1 answer
  • as earth rotates about it’s axis, it takes three hours for the united states to pass beneath a point above earth that is station
    15·1 answer
  • In a cell protein synthesis is the primary function of
    9·1 answer
  • Monochromatic light with a wavelength of 6.4 E -7 meter passes through two narrow slits, producing an interference pattern on a
    10·1 answer
  • Emir is standing in a treehouse and looking down at a swingset in the yard next door. The angle of depression from Emir's eyelin
    10·2 answers
  • Which geologic feature would most likely be represented by contour lines drawn far apart from one another?
    15·1 answer
  • An incandescent bulb produces 520 lumens and has an efficacy of 13 lm/W.
    6·2 answers
  • PLS I NEED HELP!!!!!!
    12·1 answer
  • A 1200 kg car traveling at 20.83 m/s comes to a screeching halt in a time of 6.00 seconds. Calculate the force of friction exper
    9·1 answer
  • A science student makes the following statement:
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!