Answer:
1) A. 0.44 m/s East + 0.33 m/s North
2) A. 0 m/s²
3) A. a scalar calculated as distance divided by time.
4) B. 31 km per hour
Explanation:
1) Velocity is DISPLACEMENT over time.
at 1 m/s, total time of walking is 9000 seconds
displacement is 3000 m north and 5000 - 1000 = 4000 m east
4000 m/ 9000 s = 0.44 m/s E
3000 m/ 9000s = 0.33 m/s N
2) constant speed means no acceleration
3) A. a scalar calculated as distance divided by time.
4) displacement 50 km N and 80 km W
v = √(50² + 80²) / (1 + 2) = 31.446603... km/hr
Answer:
Explanation:
Heat capacity A = 3 x heat capacity of B
initial temperature of A = 2 x initial temperature of B
TA = 2 TB
Let T be the final temperature of the system
Heat lost by A is equal to the heat gained by B
mass of A x specific heat of A x (TA - T) = mass of B x specific heat of B x ( T - TB)
heat capacity of A x ( TA - T) = heat capacity of B x ( T - TB)
3 x heat capacity of B x ( TA - T) = heat capacity of B x ( T - TB)
3 TA - 3 T = T - TB
6 TB + TB = 4 T
T = 1.75 TB
Explanation:
Initial time, t₁ = 2:30 pm
Final time, t₂ = 2:30:45
We need to find the motion of students in terms of time. Final time is 45 seconds more than the initial time.
Change in time,
Hence, this is the required solution.
Answer:
18 times
Explanation:
According to the security purposes which is set under the rules and regulation OSHA, which describes all the rights to the worker.
In the boom hoist receiving system all the sheaves which are used should have a pitch diameter of rope not less than 18 times the diameter of the nominal rope which is used.
