It would be the last one. because adding fertilizers to the soil, makes the soil rich for a plant to grow "healthy"
Answer:
conduction- toughing a stove and getting burnt
Explanation:
convection-hot air rising cooling and falling radiation-heat from the sun warming your face
Answer:
15.29m/s
Explanation:
Using the law of conservation of momentum
m1u1+m2u2 = (m1+m2)v
m1 is the mass of the clown = 85kg
u1 is the velocity of the clown = 0m/s (fired out from rest)
m2 is the mass of the cannon = 480kg
u2 is the velocity of the cannon = 18m/s
Let v me the recoil speed of the cannon
Substitute into the formula
85(0)+480(18) = (85+480)v
0+8640 = 565v
v = 8640/565
v = 15.29m/s
Hence the recoil speed of the cannon is 15.29m/s
Answer:
F = 7.143 kN
Explanation:
given,
time taken to apply break = 1.05 s
car slows down from 15 m/s to 9 m/s
mass of the car = 1250 Kg
force is equal to the change in momentum with respect to time.
F = -7142.85 N
F = - 7.143 kN
Force is acting opposite direction of velocity of car i.e. the sign is negative.