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adell [148]
3 years ago
6

4. The time it takes an object to rotate once is ​

Physics
1 answer:
pshichka [43]3 years ago
3 0

Answer:

Explanation:

23.9344696 hours

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What is Newton's gravitational constant ? write down its value and si unit.​
Irina18 [472]
Answer: 6.67 x 10^-11 m^3•kg^-1•s^-2
6 0
3 years ago
What is the relationship among
lawyer [7]
The bigger the object the greater the gravitational pull, so the farther away the big object is its gravitational force begins to decrease. Refer to the picture for more explanation.

4 0
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In your own words, explain the effects of time dilation.
Natalka [10]
So we want to explain the effects of time dilation. In theory of relativity time dilation is the difference of elapsed time between two events when measured by two observers who are moving relatively to each other. A clock of an observer that is standing still in an inertial frame of reference is going to measure a different time of an event than the clock of an observer that is moving with some velocity with respect to the inertial reference frame that is not moving. In a nutshell, the moving clock is ticking slower than the clock that is standing still.  
7 0
3 years ago
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An engine pulls a train of 20 freight cars, each having a mass of 4.900 × 104 kg, with a constant force. The cars move from rest
bixtya [17]

Answer:

The force with which the tenth car pulls the eleventh one is called tension and is equal to:

T=119715.91 N

Explanation:

The force (F) with which the tenth car pulls the eleventh one is called tension and its direction is the X-direction or horizontal. According to Newton's Second Law of motion:  

\sum F=ma

That is, the force of the car is equal to the acceleration (a) times its mass (m). The acceleration is the change in the velocity divided by the time (i is for initial and f is for final).

a=\frac{v_f-v_i}{t_f-t_f}

Using Newton's second law:  

To find the forces, you have to solve the equilibrium in X-direction:

\sum F_x=T=ma_x

Now you can substitute the accelertion in terms of velocity and time:

\sumF_x=T=ma_x=m\frac{v_f-v_i}{t_f-t_i}

Solve the equation using the data from the problem, remember that the mass of the object is 10 times the mass of one car because the 10th car has to pull all the other cars:

T=m\frac{v_f-v_i}{t_f-t_i}=(10)*(4.900 \times 10^4 kg)(\frac{4.3 m/s}{17.60s})\\T=119715.91 N

4 0
3 years ago
What is an ordered pair on a distance versus time graph?
wariber [46]

If we choose the x-axis to represent time and the y-axis to represent distance, then an (x, y) ordered pair will represent (time, distance). A particular distance paired with a particular time.

Choice C

5 0
3 years ago
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