Questions in physics

Questions in physics

📝 Answered - Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward. - The blue car accelerates uniformly at a rate of 5.8 m/s\(^2\) for 3.3 seconds. It then continues at a constant speed for 9.8 seconds, before applying the brakes such that the car’s speed decreases uniformly, coming to rest 255.79 meters from where it started. - The yellow car accelerates uniformly for the entire distance, finally catching the blue car just as the blue car comes to a stop. Question: 3) How far does the blue car travel before its brakes are applied to slow down?

📝 Answered - A turntable is designed to acquire an angular velocity of 32.4 rev/s in 0.5 seconds, starting from rest. Find the average angular acceleration of the turntable during the 0.5-second period. Answer in units of rad/s².

📝 Answered - How could you compare the energy carried in two different longitudinal waves?

📝 Answered - How does transpiration play a role in the water cycle?

📝 Answered - Two identical freight cars roll without friction towards each other on a level track. One car rolls at 2 m/s, and the other at 1 m/s. After the cars collide, they couple and roll together with a speed of:

📝 Answered - If the speed of an object is tripled, its kinetic energy will be:

📝 Answered - In what ways is climate controlled by the sun and the water cycle?

📝 Answered - A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s, as shown in the figure. The stairs are angled at 45° pointing in the direction of motion as shown. Write the vector velocity of the passenger relative to the water. Express your answer using two significant figures. Express your answer in terms of the unit vectors [tex] \mathbf{i} [/tex] and [tex] \mathbf{j} [/tex].

📝 Answered - Does the depth of a pan affect how water freezes?

📝 Answered - Is it possible for a distance-versus-time graph to be a vertical line?