If we cut a bar magnet in half pieces according to the image that is given below the question, then the magnet will show NS/NS that is (North-South/North-South) because the smaller pieces of the magnet will become a small magnet with the same property-carrying both the poles, north pole as well as south pole. The poles will not be separated.

5 0

4 years ago

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Compare the kinetic energy of a 20,000-kg truck moving at 110 km/h with that of an 80-kg astronaut in orbit moving at 27,500 km/

Ivahew [28]

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.

7 0

3 years ago

Elevator mass 750kg tension on cable 8950n what is the net force action on the elevator

Hunter-Best [27]

The answer to this question i think would be 8950. Do you have any answer choices.

8 0

4 years ago