Answer:
2.Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune
Explanation:
1. I do not understand what is being asked.
If you could comment with more understandable question ill do my best to help. (:
Work is equal to the force exerted times the distance traveled. This can be expressed using the following formula:
W = F × D
Insert any known values into the formula above:
W = (70 N) × (9 m)
Simplify the right side of the equation:
W = 630 N·m
The work done is equal to 630 J.
I hope this helps!
Answer:
acceleration a = 1.04 m/s2
Explanation:
Assume the train has a speed of 23m/s when the last car passes the railway workers. Once this happens the last car would have traveled a total distance of the 180m distance between the railway worker standing 180 m from where the front of the train started plus the 75m distance from the first car to the last car:
s = 75 + 180 = 255 m
We can use the following equation of motion to find out the distance traveled by the car:
where v = 23 m/s is the velocity of the car when it passes the worker, = 0m/s is the initial velocity of the car when it starts, a m/s2 is the acceleration, which we are looking for.
Answer with Explanation:
We are given that
Mass of one body=4.5 kg
Initial velocity of one body=8.9 m/s
Initial velocity of another body=0
Final velocity of one body=
a.We have to find the mass of the other body.
Energy and momentum are conserved in this system
(equation I)
From conservation of kinetic energy
(equation II)
Substitute equation I in equation II
Substitute the given values then we get
Hence, the mass of other body=3 kg
b.We have to find the speed of two body center of mass .
The center of mass speed is given by
Substitute the values then we get
Hence, the speed of the two body center of mass is given by =5.34 m/s
Answer:
<h3>6.80kg, 6.70kg and 6.90kg.</h3>
Explanation:
To get the set of measurements that best represents accuracy if the true value is 6.80 kg, we will find the mean of the set of numbers and chech which is equal to 6.80kg
According to the set of data 6.8kg, 6.7kg and 6.9kg
Mean = sum of the number/sa mple size
Sum of the numbers = 6.8+6.7+6.9 = 20.4
sample size = 3
Mean of the set of measurement = 20.4/3
Mean of the set of measurement is 6.80kg
Since the answer is 6.8kg, hence set of measurements that best represents accuracy are 6.80kg, 6.70kg and 6.90kg.