Answer:
D.
Explanation:
Specifically, Special Relativity showed us that space and time are not independent of one another but can be mixed into each other and therefore must be considered as the same object, which we shall denote as space-time. The consequences of space/time mixing are: time dilation. and length contraction.
Answer:
72Watts
Explanation:
Power = Force * distance/Time
Given the following
Force = 2.4 x 10^2 = 240N
distance = 1.2m
Time = 4.0secs
Substitute
Power = 240*1.2/4
Power = 60 * 1.2
Power = 72watts
Hence the power required to lift the box is 72Watts
Use a scale and record the weight in cm^3
Answer:
1.53 s
Explanation:
Initially vertical component of velocity of the ball, uy = 7.5 m/s
Net displacement is vertical direction is zero, Δy =0
Use second equation of motion:
Δy = uy t + 0.5 a t²
Here, acceleration a = -g (g =9.8 m/s²)
Substitute all the values and solve for g
0 = 7.5 t -0.5 (9.8)t²
7.5 t = 4.9 t²
t = 1.53 s
Answer:
Explanation:
The Law of Momentum Conservation for us has the equation
![[m_rv_r+m_gv_g]_b=[m_rv_r+m_gv_g]_a](https://tex.z-dn.net/?f=%5Bm_rv_r%2Bm_gv_g%5D_b%3D%5Bm_rv_r%2Bm_gv_g%5D_a)
and filling in:
![[(.50)(5.0)+(.50)(0)]=[(.50)(2.0)+(.50)v_g]](https://tex.z-dn.net/?f=%5B%28.50%29%285.0%29%2B%28.50%29%280%29%5D%3D%5B%28.50%29%282.0%29%2B%28.50%29v_g%5D)
and
2.5 = 1.0 + .50v and
1.5 = .50v so
v = 3 m/s
