Answer:
-0.912 m/s
Explanation:
When the package is thrown out, momentum is conserved. The total momentum after is the same as the total momentum before, which is 0, since the boat was initially at rest.
where are the mass of the child, the boat and the package, respectively. are the velocity of the package and the boat after throwing.
Answer:
A) 0.1773
B)Right electrode is the positive one
Explanation:
THIS IS THE COMPLETE QUESTION
certain metal M forms a soluble sulfate salt M S04. Suppose the left half cell of a galvanic cell apparatus is filled with a 4.50 mM solution of M2SO4 and the right half cell with a 4.50 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 20.0 °C. O left Which electrode will be positive? Oright x 5 ? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits.
EXPLANATION;
SEE THE ATTACHMENT BELOW
Answer: 18.9 calories
Explanation:
The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.
Q = Heat absorbed
m= mass of substance = 1.0 g = 0.001 kg
c = specific heat capacity of aluminium =
Initial temperature = = 847 K
Final temperature = = 933 K
Change in temperature ,
Putting in the values, we get:
(1J=0.24cal)
The number of calories required for this heat up process is 18.9 calories.
The electron’s speed when it reaches the positive plate is 2.65 X 10⁶m/s
<u>Explanation:</u>
Electric field strength, E = 20,000 N/C
Distance, x = 1 mm = 1 X 10⁻³m
Speed of the electron, s = ?
We know,
Charge of an electron, q = 1.602 X 10⁻¹⁹ C
So the force, F is
20000 N/C x 1.602 X 10⁻¹⁹ C = 3.2 X 10⁻¹⁵ Newtons
mass of electron is 9.1×10⁻³¹ kg
F = ma
a = 3.2 X 10⁻¹⁵ / 9.1 X 10⁻³¹ = 3.52 X 10¹⁵ m/s²
v = √(2ad) = √(2*3.52 X 10¹⁵ X 0.001) = 2.65 X 10⁶m/s
Therefore, the electron’s speed when it reaches the positive plate is 2.65 X 10⁶m/s
Answer:
Explanation:
Newton's laws of motion are three physical laws that, together, laid the foundation for classical mechanics. They describe the relationship between a body and the forces acting upon it, and its motion in response to those forces. “