
select the quantity that has changesvelocity or speedfor a car that travels north at 88 km/h and then turns east while continuing to move a 88km/h. explain your answer.

A Texas cockroach of mass 0.17 kg runs counterclockwise around the rim of a lazy Susan (a circular disk mounted on a vertical axle) that has radius 15 cm, rotational inertia 4.5 103 kg m2, and frictionless bearings. The cockroach's speed (relative to the ground) is 2.0 m/s, and the lazy...

A 50.0 kg child takes a ride on a Ferris wheel that rotates four times each minute and has a diameter of 24.0 m

A car of mass M = 1100 kg traveling at 60.0 km/hour enters a banked turn covered with ice. The road is banked at an angle theta, and there is no friction between the road and the car's tires. What is the radius r of the turn if theta = 20.0^\circ (assuming the car continues in uniform...

A block of mass = 2.1 kg is attached to a string that is wrapped around the circumference of a wheel of radius = 8.0 cm. The wheel rotates freely about its axis and the string wraps around its circumference without slipping. Initially the wheel rotates with an angular speed , causing the block...

A 1200 kg car carrying four 75 kg people travels over a washboard dirt road with corrugations 3.8 m apart. The car bounces with maximum amplitude when its speed is 13 km/h. When the car stops, and the people get out, by how much does the car body rise on its suspension?

A car starts from rest and then accelerates uniformly to a linear speed of 16 m/s in 42 s. If the tires have a radius of 27 cm, what are the following? (a) the average linear acceleration of a tire 0.381 m/s2 (b) the angular acceleration of a tire 1.41 rad/s2 (c) the angular...

A steel building is 107 m tall when the outside temperature is 0 C. How tall is the building on a hot summer day (33 C)? The change in height is small, so express your answer with 3 decimal places.

This star map shows stars as we see them in our sky from Earth, centered around the constellation Canis Major. Larger dots represent brighter stars, and a few of the brightest stars are identified. From this view alone, what can you conclude about Sirius?

A 23.0 kg gold bar at 25.0 C is placed in a large, insulated 0.800 kg glass container at 15.0 C with 2.00 kg of water at 25.0 C. Calculate the final equilibrium temperature.
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Sample Questions
 The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
 (a) What is the average angular acceleration of the Earth?
 (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
1. Can you show me step by step how to solve this problem?:
 A spherical balloon is made from a material whose mass is 3.00kg. The thickness of the material is negligible compared to the 1.5m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19kg/m^3. Find the absolute pressure of the helium gas
2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
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