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A science book is being pushed across a table Can the book have a constant speed and a changing velocity?
Wiki User
∙ 15y ago
It can have a constant speed, and a changing velocity, but it cannot have the two at the same time. Remember: Velocity = speed with a directional component.
Wiki User
∙ 15y ago
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Define constant angular velocity and explain how it applies to CD standards?
Constant angular velocity of a rotating disk means that, given a stationary base reference line and a zero line on the disk, both extending from the center of rotation to the outside edge of the disk, the periodic change in angle between the two lines remains a constant. Such a disk will have constant angular velocity (CAV) if its rate of rotation or revolutions per minute (RPM) remains constant.While it would be technically possible to have the linear velocity of the disk remain constant by gradually decreasing the speed of rotation as the player head moves across the disk (because the outer paths are longer than the inner ones), this would make things more complicated both for the recording and playback machines, and therefore more expensive.The paths of information on a CD (or DVD) are analogous to the grooves on an LP recording. The recording and playback heads move across the disk (CD or LP) as it rotates. Actually, of course, there is only one spiral path or groove; on an LP, it goes from the outside edge toward the center; on a CD/DVD, it goes in the opposite direction. In deciding on the parameters for the LP and CD, engineers had to involve the amount of data to be recorded and the spacing required to record that data versus the size of the disk, the speed of rotation, the data capacity of the disk material, and the sensitivity of both the recording and playback heads.The result of this engineering was set as the standard for recording audio LP's and CD's and, later, DVD's.
What does interate mean?
It is a word commonly used in Chemical Engineering. It means to iterate for a solution across an integral. For example, in adiabatic flame temperature calculations when given the generated enthalpy and asked to solve for final temperature. A chemical engineer must iterate to solve for the final temperature across the constant pressure heat capacity integral.
What does across from mean?
A house directly opposite my home, straight across the road, is therefore across from me.
Can you write a sentence using the word across?
He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.He looked across the garden, but he did not see the cat anywhere.
What is the opposite of across in prepositions?
As a preposition, across can be used in many ways. Some examples of opposites in use:We can get to the other side across the lake or around the lake.We can travel to Spain sailing across the ocean or flying over the ocean.We will make it across the chasm or fall into the chasm.You may use the phone across the room or up the stairs.We can travel across the country or stay athome.We will make it across the border or land injail.
When is an object said to have uniform velocity?
It isn't. Constant velocity? Uniform velocity across a group of objects?
If a graph shows time on the horizonal axis and speed on the vertical axis a straight horizontal line across the graph would indicate?
The straight horizontal line would indicate constant speed.(NOT constant velocity. The velocity could very well be changing, but the graphdoesn't tell you anything about the direction of the motion, only that the speedis constant.)
What is the first law of motion to the motion of an ice skater sliding across the ice st a constant velocity?
If the velocity is constant, it follows that the the sum of all forces on the ice skater is zero.
When an object is pulling across a level surface at a constant velocity what force is the pulling force equal to?
Friction.
What doe constant mean in science?
A constant variable is one that is not the independent variable (the one you are changing) or the dependent variable (the one you change). Constant variables are so named because in order for the experiment to be legitimate, it is expected that the scientist control them, thus keeping them constant across all trials. This ensures that changes in the dependent variable are only the result of changes in the independent variable.
If you slide a hockey puck across a frictionless ice rink these must be a horizontal force on it too keep it in the motion?
F=ma constant speed would mean 'a' acceleration is zero thus force zero. The puck would be in equilibrium, and the force would be zero at constant motion. Constant motion is constant velocity including the constant zero velocity.
A glider sailing across the sky at a steady speed and altitude an example of and unbalanced force?
No. A glider that is moving at a constant speed and in a constant direction is at a constant velocity. In other words it is not accelerating. Therefore, all forces on it must be balanced.
What does constants variable mean in science?
A constant variable is one that is not the independent variable (the one you are changing) or the dependent variable (the one you change). Constant variables are so named because in order for the experiment to be legitimate, it is expected that the scientist control them, thus keeping them constant across all trials. This ensures that changes in the dependent variable are only the result of changes in the independent variable.
Is the Texas climate changing?
The climate everywhere remains in a constant state of flux. It is always changing. It Texas, as across most of earth, the climate is currently changing substantially faster than by any strictly natural means.
A man pushes a large box across a rough wooden floor. The box moves with constant velocity. What can be said about the forces acting on the box?
There is no unbalanced force acting on the box.
A force of 80.0 N is required to pull a 25.0kg block across a constant velocity on a smooth surface on earth What force is required to pull the same block across the surface of Jupiter?
That's a trick question, right? Jupiter has no surface.
Descrbe a real world situation where there is zero acceleration but some velocity.?
-- a car on cruise control rolling along at a constant speed on a straight section of highway -- a golf ball or squash ball rolling across the gym floor at a constant speed
