An elastic loaded water balloon launcher fires balloons at an angle of 52°with the ground. If the initial velocity of the balloon is 25 m/s, determine a)how far away from the launcher will each balloon land when it just comes in contact with level ground once more?
b)How high above the ground is the balloon at 3 seconds?
c)How high above the ground is the balloon after it has traveled 40 meters?

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg

answersysvol bloat;

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.