The following report for a collision of two marbles has an error. "Marble 1 has a mass of 12 g, an initial speed of 0.84 m/s left, and a final speed of 0.21 m/s right. Marble 2 has a mass of 23 g, an initial speed of 0.42 m/s right, and a final speed of 0.31 m/s left." What change to the report's data would give a correct verification of momentum conservation?
This is the third time I’m asking, please, On a wet road, is a higher coefficient of friction on the tires safer or a lower one and pls explain I don’t get it
Below are three different arrangements of two mirrors near a source of light. For each arrangement, a light ray is drawn from the source to the first mirror. In which of these arrangements would the light eventually travel parallel to, but in the opposite direction to, the original light. [This type of device is called a retro-reflector.] A. B. C.
IC A book is at rest on a table. Identify the correct free-body diagram for this situation. F₁ Intro F₂ F FN F₂ Done
On a wet road, is a higher coefficient of friction on the tires safer or a lower one and pls explain I don’t get it. I would love to make this question worth more points but someone stole all 20 points without helping me, I’m rlly exhausted please help
1. In the interaction between a hammer and the nail hits it, is a force exerted on the nail? On the hammer? How many forces occur in this interaction? 2. When a hammer exerts a force on a nail, how does the amount of force compare with that of the nail on the hammer? 3. When you walk along a floor, what pushes you along? 4. When swimming, you push the water backward- call this action. What is the reaction force? 5. If the action is a bowstring acting on an arrow, Identify the reaction force. 6. When you jump up, the world really does recoil downward. Why can't this motion of the world be noticed? 7. When a cannon is fired, how does the size of the force of the cannon on the cannonball compare with the force of the cannonball on the cannon? How does the acceleration of the cannon compare with that of the cannonball? Defend your answer. 8. How can a rocket be propelled above the atmosphere where there is no air to "push against"? 9. In order to increase its speed why must the horse push harder against the ground than it pulls on the wagon? 10. If you walk on a log that is floating in the water, the log moves backward. Why? 11. Draw a picture that shows Newtons 3rd Law, Identify and explain what is happening.
What do astronomers refer to as the retrograde motion of the planets? A. apparent movement of the planets eastward in a single night B. apparent movement of the planets westward in a single night C. apparent movement of the planets eastward from night to night D. apparent movement of the planets westward from night to night
On a wet road, is a higher coefficient of friction on the tires safer or a lower one and pls explain I don’t get it
An 800-kg car traveling in a straight line at a speed of 30 m/s applies its brakes. During braking, there is a net force of 2000 N in the horizontal direction on the car. What distance will the car move from the time it applies its brakes until it has stopped? a.12 b.75 c.180 d.300 e.60000
In a parallel universe, the value of Planck's constant is 6.63x10-2 J-s. Assume that the physical laws and all other physical constants are the same as in our universe. In this other universe, two physics students are playing catch with a baseball. They are 60.0 m apart, and one throws a 0.100 kg ball with a speed of 5.00 m/s Part A What is the uncertainty in the ball's horizontal momentum in a direction perpendicular to that in which it is being thrown if the student throwing the ball knows that it is located within a cube with volume 1000 cm³ at the time she throws it? Express your answer in kilogram meters per second. Part B By what horizontal distance could the ball miss the second student? Express your answer in meters.
In the winter, an animals fur provides warmth through which method? A. Conduction B. Convection C. Radiation
