for the truck :
M = mass of the truck = 20000 kg
V = speed of truck = 110 km/h = 110 (km/h) (1000 m/1 km) (1 h/3600 sec) = 30.6 m/s
kinetic energy of truck is given as
KE₁ = (0.5) M V²
inserting the values
KE₁ = (0.5) (20000) (30.6)² = 9363600 J
for the astronaut :
m = mass of astronaut = 80 kg
v = speed of astronaut = 27500 km/h = 27500 (km/h) (1000 m/1 km) (1 h/3600 sec) = 7638.9 m/s
kinetic energy of astronaut is given as
KE₂ = (0.5) m v²
inserting the values
KE₂ = (0.5) (80) (7638.9)²
KE₂ = 2.33 x 10⁹ J
Ratio of kinetic energy of truck with kinetic energy of astronaut is given as
KE₁ /KE₂ = (9363600)/(2.33 x 10⁹)
KE₁ /KE₂ = 0.00402
kinetic energy of truck is 0.00402 time the kinetic energy of astronaut.
Answer:
Force / mass
Explanation:
Divide mass on both sides to get acceleration by itself leaving you with mass below force hence divide force by mass
The graph is showing a constant velocity as the line is horizontal. The initial speed is equal to the final speed as there is no changing in acceleration. The second statement is the correct statement
Initial = 2.5 m/s
Final = 2.5 m/s
Answer:
Yes
Explanation:
A neutral atom has equal no. of protons and electrons.
Answer:
Mass, m = 27g
Explanation:
<u>Given the following data;</u>
Initial Temperature, T1 = 25°C
Final temperature, T2 = 50°C
Quantity of heat = 2825J
Specific heat capacity of water = 4.184
Heat capacity is given by the formula;
Where,
- Q represents the heat capacity.
- m represents the mass of an object.
- c represents the specific heat capacity of water.
- dt represents the change in temperature.
Making mass, m the subject of formula, we have;
Change in temperature, dt = T2 - T1
Change in temperature, dt = 50-25 = 25°C
Substituting into the equation, we have;
Mass, m = 27g
Therefore, the mass of water that can be added is 27 grams.