Answer:
Explanation:
The force that one atom exerts on the other is the negative derivative of the potential energy =
F(x) = - ( -C₆ / x⁷) = - (- (-6) C₆ x⁻⁶ ⁻¹) = - 6C₆ /x⁷
when xis negative, F is positive and when x is positive, F is negative. It is therefore and attractive force and F is always directed to the center
Answer:
The acceleration expressed in the new units is
Explanation:
To convert from to it is necessary to remember that there are 1000 meters in 1 kilometer and 3600 seconds in 1 hour:
Then by means of a rule of three it is get:
Hence, the units of meters and seconds will cancel. Notice the importance of square the ratio 3600s/1h, so that way they can match with the other units:
So the acceleration expressed in the new units is .
Answer:
R
Explanation:
Given that,
Two stage rocket traveling at
V = 1210 m/s with respect to earth
First stage
When fuel Is run out , explosive bolts releases and push rocket backward at speed is
V1 = 40m/s relative to second stage
Therefore
V1 = 40 - V2
The first stage is 3 times as massive as the second stage
I.e Mass of first stage is 3 times the second stage
Let Mass of second stage be
M2 = M
Then, M1 = 3M
Velocity of second stage V2?
Applying conservation of linear momentum
Momentum before explosion = momentum after explosion
Momentum p=mv
Then,
(M1+M2)V = —M1•V1 + M2•V2
(3M+M)•1210 = —3M•(40-V2) +M•V2
4M × 1210 = —120M + 3M•V2 + MV2
4840M = —120M + 4M•V2
4840M + 120M = 4M•V2
4960M = 4M•V2
Then, V2 = 4960M / 4M
V2 = 1240 m/s
Answer:
D. The truck and trailer will experience a net force of 40 newtons backward
Explanation:
Taking the greatest force (trailer), and subtracting it by the smaller force (truck), we can find how many newtons the greater force is applying to pull the whole system:
2,790 - 2,750 = 40 N
Since we know that the trailer is the greater force, the truck & trailer are being pulled backwards by 40 Newtons
B. Winter Would be ur answer
Hope I helped:P