Physics, 23.02.2021 02:40 yeicooyola3

Suppose a meteor of mass 2.50 x 1013 kg is moving at 33.0 km/s relative to the center of the Earth and strikes the Earth. Suppose the meteor creates the maximum possible decrease in the angular speed of the Earth by moving toward the west and striking a point on the equator tangentially. What is the change in the angular speed of the Earth due to this collision

Answers: 3

Show answers

Answers

Answer from: joytheqt

change is imperceptible

w_f = 7.272 10⁻⁵ rad / s

Explanation:

For this exercise we can use the conservation of angular momentum.

Initial. Before the crash

L₀ = I w₀

final. After the crash

L_f = I w_f + p r

where the moment is

p = mv

As the system is formed by the two bodies, the forces during the impact are internal, therefore the angular momentum is conserved

L₀ = L_f

I w₀ = I w_f + m v r

w_f = w₀ - $m \frac{ v \ r }{I}$

We can approximate the Earth to a sphere, so its angular momentum is

I = 2/5 M r²

we substitute

w_f = w₀ - $\frac{5 \ m \ v}{2 \ M \ r}$

We can find the angular velocity of the Earth with the duration of a spin which is the period of one day

w₀ = 2π / T

T = 24 h (3600 s / 1h) = 86 400 s

w₀ = 2π / 86400

w₀ = 7.272 10⁻⁵ rad / s

let's calculate

w_f = 7.27 10⁻⁵ - $\frac{5 \ 250 \ 10^{13} \ 33.0 \ 10^{3} }{ 2 \ 5.98 \ 10^{24} \ 6.37 10^{6} }$

w_f = 7.272 10⁻⁵ - 1.0829 10⁻¹³

w_f = 7.27199999 10⁻⁵

this change is imperceptible

w_f = 7.272 10⁻⁵ rad / s

Answer from: Quest

i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.

Answer from: Quest

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

Another question on Physics

Physics, 21.06.2019 23:20

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

Answers: 1

Answer

Physics, 22.06.2019 03:50

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. each step is of uniform height . the mass of each object is a multiple of the base mass : object 1 has mass 4..00m , object 2 has mass 1..96m , and object 3 has mass . when the objects are at the bottom of the steps, define the total gravitational potential energy of the three-object system to be zero. if the objects are then relocated as shown, what is the new total potential energy of the system? each answer requires the numerical coefficient to an algebraic expression. each algebraic expression is given using some combination of the variables , , and , where is the acceleration due to gravity. enter only the numerical coefficient. (example: if the answer is 1..23mgd , just enter 1.23)

Answers: 3

Answer

Physics, 22.06.2019 19:50

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.

Answers: 3

Answer

Physics, 22.06.2019 21:10

For the below questions, consider a consumer that consumes two goods, x and z with the following utility function. u with bar on top space equals space x to the power of 1 third end exponent z to the power of 2 over 3 end exponent suppose initial values for income and the prices of goods x and z are y equals 90, p subscript x equals space 10, and p subscript z equals 15 respectively, then the price of good x falls to syntax error from line 1 column 89 to line 1 column 100. unexpected '\'.. what is the magnitude of the total effect

Answers: 3

Answer

You know the right answer?

Suppose a meteor of mass 2.50 x 1013 kg is moving at 33.0 km/s relative to the center of the Earth a...

Questions