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:
B
Explanation:
B is the most likely region that contains alkaline earth family elements.
Answer:
Energy
Explanation:
Waves can transfer energy over distance without moving matter the entire distance. For example, an ocean wave can travel many kilometers without the water itself moving many kilometers. The water moves up and down—a motion known as a disturbance. It is the disturbance that travels in a wave, transferring energy.