Answer:
a. 4.9 m
Explanation:
To solve this problem we must take into account that power is defined as the relationship between the work and the time in which the work is done.
P = W/t
where:
P = power = 95 [W] (units of watts)
W = work [J] (units of Joules)
t = time = 6.2 [s]
We can clear the work from the previous equation.
W = P*t
W = 95*6.2 = 589 [J]
Now we know that the work is defined by the product of the force by the distance, therefore we can express the work done with the following equation.
W = F*d
where:
F = force = 120 [N] (units of Newtons)
d = distance [m]
d = W/F
d = 589/120
d = 4.9 [m]
B. the continents were once joined together..... this is pangaea
Answer:
Y, X, Z, W
Explanation:
Jerome must put the given models in the order Y, X, Z, W to display the development of atom from the earliest to the most recent one. 'Y' represents 'Thomson's plum pudding model' came in 1904 which was followed by the 'Rutherford's nuclear atomic model' of 1911 as represented by X. This was succeeded by the 'Bohr's electrostatic model' in 1913(as shown in model Z) and lastly, the model W which exemplifies the 'Quantum Mechanical Model' by Edwin Schordinger in 1926. Thus, the correct order is <u>Y, X, Z, W</u>.
The answer is 323 K.
<u>Explanation:</u>
The Celsius temperature scale is equal to - 273.15.
One kelvin is equal to the change of thermodynamic temperature that results in a change of thermal energy kT by 1.380649 * 10^−23 J.
Convert degrees Celsius to kelvins with this simple formula:
kelvins = [degree C] + 273.15
The formula to convert Celsius to kelvins is degree C + 273.15.
50 degree celsius = 50 + 273.15
= 323.15 = 323 K.
Answer:
12 kJ
Explanation:
Given:
v₀ = 0 km/h
a = 5 km/h²
t = 30 min = 0.5 h
Find: v
v = at + v₀
v = (5 km/h²) (0.5 h) + 0 km/h
v = 2.5 km/h
v = 2.5 km/h × (1000 m/km) × (1 h / 3600 s)
v = 0.694 m/s
KE = ½ mv²
KE = ½ (50,000 kg) (0.694 m/s)²
KE = 12,000 J
KE = 12 kJ
