Answer:
TRUE
Explanation:
Balance forces are usually defined as the two distinct force that acts on an object but in opposite directions. These two acting forces are equal in size or magnitude. When this type of force is applied on any object, it signifies that the object is stationary or it is moving at a constant speed and in the same direction.
This force is comprised of two most important properties namely the strength and direction. When any of the two forces is higher then it result in the motion of the object.
Thus, the above given statement is TRUE.
Only light can travel through empty space, as sound is a vibration that uses a medium such as air to travel through. Electromagnetic waves do not need a medium.
Answer:
there can be acceleration
Explanation:
because of the friction. If the friction and applied force is nowhere then it will not move, but if it has a friction it will move but not in the same direction it can only move slightly or really move. based on me only
Answer: M = 42.553· kg
Explanation: A orbit where a body remains traveling around a gravitating mass at constant radius is called Circular Orbit. Although in reality the orbit is more like an ellipse, the circular orbit is a good approximation to the real one.
In that system, it is possible to determine the velocity needed to maintain the orbit. The formula is: v = , where:
v is velocity;
G is the gravitational constant( = 6.67·)
M is the mass of the gravitating mass;
r is the distance between the center of the massive object and the orbiting object;
But, this question is asking for the mass M, so, rearraging:
Transforming light-years in metres and dividing by 2 to find the radius:
r = (15.9.461 x 10¹⁵)· = 70.9575
M =
M = 42.553.kg
The mass of the massive object at the center of the ring is 42.553.kg.
An open system can exchange both matter and energy with the surroundings. Δ H is measured when
an open system is used as a calorimeter.
A closed system has a fixed amount of matter, but it can exchange energy with the surroundings. Δ U is
measured when a closed system is used as a calorimeter because there is no change in volume and thus no
expansion work can be done.
An isolated system has no contact with its surroundings. The universe is considered an isolated system but on
a less profound scale, your thermos for keeping liquids hot approximates an isolated system.