(A) The total initial momentum of the system is
(1.30 kg) (27.0 m/s) + (23.0 kg) (0 m/s) = 35.1 kg•m/s
(B) Momentum is conserved, so that the total momentum of the system after the collision is
35.1 kg•m/s = (1.30 kg + 23.0 kg) <em>v</em>
where <em>v</em> is the speed of the combined blocks. Solving for <em>v</em> gives
<em>v</em> = (35.1 kg•m/s) / (24.3 kg) ≈ 1.44 m/s
(C) The kinetic energy of the system after the collision is
1/2 (1.30 kg + 23.0 kg) (1.44 m/s)² ≈ 25.4 J
and before the collision, it is
1/2 (1.30 kg) (27.0 m/s)² ≈ 474 J
so that the change in kinetic energy is
∆<em>K</em> = 25.4 J - 474 J ≈ -449 J
Answer:
It would be A
Explanation:
velocity is speed and direction
The change in heat q for the aluminum cup is 141 J.
<h3>What is Specific heat?</h3>
A substance's heat capacity is the amount of heat needed to increase its overall temperature by one degree. The heat capacity is known as the specific heat capacity or the specific heat if the substance's mass is unity.
change in heat -
The amount of heat Q that is transported to create a temperature shift depends on the substance and phase involved, the mass of the system, and the magnitude of the temperature change. (A) The temperature change and the amount of heat transported are directly inversely related.
The answer's sign dig is determined by a calculation's lowest sign digits.
The solution will need 3 digits because the temperatures are provided with 3 significant digits and the specified heat has 3 significant digits (the mass has 4 significant digits).
31.91 g * 0.903 J/g-C * (26.1 - 21.2 C) = 141 J
to learn more about Specific Heat go to - brainly.com/question/21406849
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Answer
given,
Mass of satellite, m = 4500 kg
Mass of the earth, M = 6 x 10²⁴ Kg
Earth circular orbit radius, R = 9.3 x 10⁶ m
a) To find the speed of the satellite
we need to equate the gravitation force between earth and satellite with the centripetal force.
V = 6559.89 m/s
b) Minimum amount of energy of satellite
E = 9.68 x 10¹⁰ J
Minimum amount of energy require to move satellite is equal to E = 9.68 x 10¹⁰ J
The North and East forces are 90° apart, making a right triangle with the resultant as the hypotenuse.
(200)² + (410)² = F²
40,000 + 168,100 = F²
√(208,100) = F
456.18 N = F
F= ma
456.18 N = (300 kg)a
456.18 / 300kg = a
1.52 m/s² = a
The sailboat will be heading North East. To find the angle of the boats trajectory use inverse tangent function.
tan(Ф) = opposite/adjacent
arctan(opposite/adjacent) = Ф
arctan(410/200) = 64° North East
