Answer:
False
Explanation:
The given statement "Two objects must be in contact for them to exert a force on each other" is not true as there are many types of forces that doesn't require being in contact for exerting a force.
One such example is the gravitational force acting between two bodies. Gravitational force is the force of pull with which a body pulls another body without being in contact.
For two bodies of masses 'M' and 'm' separated at a distance of 'R', the gravitational force is given as:
The gravitational force acts always act between bodies that have mass. The bodies are not in contact yet experience force.
Therefore, the given statement is false.
Answer:
C. Cables transmit infrared waves over longer distances.
Explanation:
A.pex
there would be atleast 24 moles of air not counting the irreplacable ones
hope this helped
Answer:
21.42m/S
Explanation:
Hello!
To solve this problem we must perform the following steps.
1. Find the distance traveled from until the driver reacts, this is achieved using the equation for constant speed movement.
X1=VT
where
x= distance traveled
v=initial speed
T=time=0.75s
X1=0.75Vo
we must take into account that the total distance is the sum of the distance at which the pilot reacts (x1) and when it starts to decelerate (x2)
39=0.75Vo+X2
X2=39-0.75Vo
2. Now we use the equation that defines a movement with constant acceleration.
where
Vf = final speed=0m/s
Vo = Initial speed
A = acceleration
=-10m/s2
X2 = displacement
now we use the ecuation of step 1
solving
Now we solve the quadratic equation and find the value of Vo
the solutions are 21.42m/S, -36.41m/S
as the speed must be positive we conclude that the answer is 21.42m/S
The appropriate response is tropics. Rainstorms happen when there is warm air that ascents. This air should likewise be clammy or saturated. Hence, regions that are warm and moist are typically where rainstorms happen. (These spots are most generally found around the equator)
