(4) 10 m/s 13. An object, travelling along a straight path, covers 35 m distance in 4 seconds. In next 6
seconds, it covers 50 m distance. What is the average speed of the object?
(1) 3.5 m/s
(2) 4.5 m/s
(3) 7.5 m/s
(4) 8.5 m/s
14. A taxi driver noted reading on the odometer fitted in

Acharge of 8.4x10^-4 c moves at an angle of 35 degrees to a magnetic field that has a field strength of 6.7x10^-3 t. if the magnetic force is 3.5 x10 ^-2 n, how fast is the charge moving?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87