Semester 1 Final- answer then question.2025 EXAM 30 m/s east - CORRECT ANSWERS Which of the following best describes the velocity of an object? 0.66 m/s2 forward, because the applied force is greater than the force of the air - CORRECT ANSWERS The

Semester 1 Final- answer then question.2025 EXAM 30 m/s east - CORRECT ANSWERS Which of the following best describes the velocity of an object? 0.66 m/s2 forward, because the applied force is greater than the force of the air - CORRECT ANSWERS The total mass of the cyclist and the bicycle is 100.0 kg. Air resistance force is 84N to the right. Applied force is 150N to the left. Based on this information, what is the acceleration of the cyclist? The speed of the car will increase. - CORRECT ANSWERS A homemade car is being pushed with a force of 25N.The force caused the car to move at a constant speed of 3m/s. What will happen if the force is changed to 35N? The forces are balanced. - CORRECT ANSWERS A ball sitting on a desk is at rest. Which statement below describes the forces at work? 1.4 m/s - CORRECT ANSWERS Some students were investigating the speed of a toy car they built. They performed two trials. Trial 1-4.0s and 5.6m Trail 2-5.0s and 7.0m What is the average speed of a toy car? When the marble is dropped into the top of the cylinder and when the marble is falling in the middle of the cylinder. - CORRECT ANSWERS A student used a video camera to record another student dropping a marble through water in a graduated cylinder. The students watched the video in slow motion and made the observations shown below. During which part or parts of the marble's fall did the marble experience unbalanced forces? At the moment of collision, the motion of the first marble changes direction and the second marble starts moving. - CORRECT ANSWERS A student rolled a marble across the floor. The marble rolled at a constant velocity until it collided with a second marble. After the two marbles collided, they rolled at a constant speed in different directions. In which of the following instances are the forces unbalanced? Unbalanced forces due to change in velocity - CORRECT ANSWERS As a roller coaster car goes into a left turn its speed is 20m/s. As the car exits the turn its speed is 20m/s. Which of the following best describes the forces being experience by the passengers in the car? The rocket pushes exhaust gases down while the exhaust gases push the rocket up. - CORRECT ANSWERS Which of these is the best description of the action-reaction force pair when the space shuttle lifts off from the launch pad? A very steep line going up. - CORRECT ANSWERS What type of line segment of a speed graph would show the greatest speed? The apple moved forward at 60 km/h. - CORRECT ANSWERS An apple was placed on the back seat of the car at rest. The car was then accelerated toward the barrier at 60 kilometers per hour (km/h). Which statement best describes the motion of the apple immediately after the car hit the barrier? Negative acceleration - CORRECT ANSWERS After the apple in the car test, the car is at rest. What was the primary cause of the car coming to rest? Coupe - CORRECT ANSWERS The net forces acting on a a vehicle when it enters the highway is 4500N. The mass of a coupe is 1200kg ant he mass of an SUV is 1800kg. Which vehicle has the greatest acceleration as it enters the highway? Electrical energy to heat and mechanical energy - CORRECT ANSWERS The main parts of a working clothes dryer dries clothes primarily by converting- Rubidium(Rb) - CORRECT ANSWERS Characteristics of an Element- Number of Protons 37 Number of Neutrons 48 Number of Valence Electrons 1 An atom of which element is described by the data? 1 - CORRECT ANSWERS The chemical formula for sodium sulfate is Na2SO4. How many sulfur atoms are in the formula for sodium sulfate? Two compounds. - CORRECT ANSWERS In the chemical reaction shown below, the products are best classified as — CaCO3 --> CaO + CO2 The 2 valence electrons in each atom of calcium. - CORRECT ANSWERS A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity? The 2 valence electrons in each atom of calcium. Parasitism - CORRECT ANSWERS A mistletoe plant grows on a tree, absorbing nutrients and water from the tree. Eventually, the mistletoe stunts the growth of the tree. What type of relationship does this describe? Parasitism