Physics, 18.12.2020 01:00 IkarosSakurai

The roller coaster track is 25 meters at its heights to point. If the 200kg cart rolls down the hill from rest, how much kinetic energy will the cart have at the bottom of the hill?

Answers: 3

Show answers

Answers

Answer from: Hfruit

49000J

Explanation:

Given parameters:

Height = 25m

Mass = 200kg

Unknown:

Kinetic energy of the cart at the bottom of the hill = ?

Solution:

The kinetic energy of the roller coaster at the bottom of the hill will be at its maximum and the potential energy is 0.

All the potential energy would have been converted to kinetic energy in essence.

So find the potential energy first;

Potential energy = mgh

m is the mass

g is the acceleration due to gravity

h is the height

Potential energy = 200 x 9.8 x 25 = 49000J

So the kinetic energy at the bottom of the hill is 49000J

Answer from: Quest

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

$_a^z\textrm{x}\rightarrow _{a-2}^{z-4}+_2^4\alpha$

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

$_a^z\textrm{x}+_{-1}^0\textrm{e}\rightarrow _{z-1}^a\textrm{y}$

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases $\gamma -radiations$ . this process does not change the mass number.

$_a^z\textrm{x}^*\rightarrow _a^z\textrm{x}+_0^0\gamma$

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as $\beta ^+$ -decay. in this the mass number remains same.

$_a^z\textrm{x}\rightarrow _{z-1}^a\textrm{y}+_{+1}^0e$

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.

Answer from: Quest

answer: you might love summer weather, but you don’t want it to feel like the sun is inside your car. but a hot car that just won’t seem to cool down might be a bigger of a problem than you think. your car relies on being at the right temperature.

explanation:

Another question on Physics

Physics, 21.06.2019 21:30

In what direction does the medium move relative to the direction of the wave? explain.

Answers: 3

Answer

Physics, 22.06.2019 02:50

Steam is generated in a boiler of a cogeneration plant at 10 mpa and 450°c at a steady rate of 5 kg/s. in normal operation, steam expands in a turbine to a pressure of 0.5 mpa and is then routed to the process heater, where it supplies the process heat. steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. in this mode, no steam passes through a condenser, which operates at 20 kpa. (a) determine the power produced in the turbine and the rate at which process heat is supplied in this mode. (b) determine the power produced in the turbine and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure. (3.32 mw; 9.69 mw; 4.25 mw; 5.82 mw)

Answers: 3

Answer

Physics, 22.06.2019 08:30

Hey student studies gravity using objects that have the same mass which two objects have the greatest gravitational force acting between them a. 100kg 1.0m 100kg b. 100kg 2.0m 100kg c. 100kg 2.0m 100kg big d. 100kg big 3.0m 100kg big

Answers: 1

Answer

Physics, 22.06.2019 10:00

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

Answers: 2

Answer

You know the right answer?

The roller coaster track is 25 meters at its heights to point. If the 200kg cart rolls down the hill...

Questions