Answer:
c) 2 blocks
Explanation:
Her displacement is the difference between her starting point and her ending point.
Let's say she starts at the origin, (0, 0).
First, she goes 13 blocks east: (13, 0)
Next, she goes 4 blocks north: (13, 4)
Then she goes 8 blocks west: (5, 4)
Then she goes 6 blocks south: (5, -2)
Finally, she goes 5 blocks west: (0, -2)
The magnitude of her displacement is the distance between her initial and final positions: 2 blocks.
Answer:
Neutralization reactions always produce water and a salt.
Explanation:
There are different types of chemical reactions that occurs. Two of them are neutralization and double-displacement reaction. Neutralization reaction is the reaction between an acid and a base to give an acid salt and water as products. For example:
2NaOH (base) + H2SO4 (acid) → Na2SO4 (salt) + 2H2O (water)
On the other hand, Double displacement reaction is the reaction that involves an ion exchange between the reactants to form new products. This ionic exchange occurs in such a way that two reactants form two new products. For example:
2NaCl + Ca(NO3)2 → CaCl2 + 2NaNO3
Therefore, the major difference between these two types of reactions is that: NEUTRALIZATION MUST ALWAYS PRODUCE WATER AND SALT AS PRODUCTS.
Answer:
833kg/m³
Explanation:
We have volume as Vm³
Density of this object = dKg/m³
Water density = 1000kg/m³
g = 10m/s²
We calculate FB which is the the buoyant force on object. Calculated as volume of object multiplied by water density
Fb = 1000Vg upwards
W = Vdg
Acceleration = net upwards/m
M = mass
2 = (1000g-gd)/d
2d = 10000 - 10d
2d + 10d = 10000
12d = 10000
d = 833.33kg/m³
Approximately 833kg/m³
The average density of the object is therefore 833kg/m³
John Huddleston<3 :* luv u bby gurl
Answer:
-19.0 kJ
Explanation:
Let's keep in mind that the direction of the resistive force is always opposite to the displacement of the bicyclist.
- In the first part of the ride:
Displacement: d = 1.86 km = 1860 m
Resistive force: F = 5.12 N
Angle between the direction of the force and the displacement: 
So, the work done by the resistive force is
- Similarly, in the second part of the ride:
Displacement: d = 1.86 km = 1860 m
Resistive force: F = 5.12 N
Angle between the direction of the force and the displacement:
So, the work done by the resistive force is
Therefore, the total work done by the resistive force during the round trip is
