The distance a toy car travels over time is shown in the graph. Motion of a Toy Car
Distance (m)
Time (1)
Which table best shows the average speed of the toy car at different time intervals?
А
Time (s)
Time (5)
Average
Speed (m/s)
1.0
Average
Speed (m/s)
2.0
0-2
0-2
2-4
0.5
2-4
3.0
4-6
0
4-6
3.0
Time (s)
Average
Speed (m/s)
Time (s)
Average
Speed (m/s)
0-2
2.0
1.0
2-4
0.75
2-4
0.75
4-6
0.75
4-6
0

What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )

Under the action of a constant force an object accelerates at 7.8 m/s2. what will the acceleration be if (a) the force is halved? (b) the object's mass is halved? (c) the force and the object's mass are both halved? (d) the force is halved and the object's mass is doubled?

Cyclotrons are widely used in nuclear medicine for producing short-lived radioactive isotopes. these cyclotrons typically accelerate h- (the hydride ion, which has one proton and two electrons) to an energy of 5 mev to 20 mev. this ion has a mass very close to that of a proton because the electron mass is negligible—about 1 2000 of the proton’s mass. a typical magnetic field in such cyclotrons is 1.9 t. (a) what is the speed of a 5.0-mev h-? (b) if the h- has energy 5.0 mev and b = 1.9 t, what is the radius of this ion’s circular orbit?