
a racecar accelerates from rest to a speed of 287 km/h in 6.8 secounds. what is its average acceleration?

A 5.7 g bullet leaves the muzzle of a rifle with a speed of 329 m/s. What total constant force is exerted on the bullet while it is traveling down the 0.76 m long barrel of the rifle?

what would be the meaning of a non zero y intercept to a graph of a reaction distance versus speed?

A cargo plane is flying horizontally at an altitude of 14.2 km with a constant speed of 952 km/hr when a large crate slides out of the rear of the plane.

A dolphin leaps out of the water at an angle of 40.1 above the horizontal. The horizontal component of the dolphin's velocity is 7.74 m/s. Find the magnitude of the vertical component of the velocity

What is the magnitude and direction of the electric force on an electron in a uniform electric field of strength 1480 N/C that points due east?

A car slows down uniformly from a speed of 29.0m/s to rest in 6.80s . How far did the car travel

one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!) string, what would be the tension in the string? Express your answer in newtons and in pounds.

In order to qualify for the nals in a racing event, a race car must achieve an average speed of 279 km/h on a track with a total length of 1340 m. If a particular car covers the rst half of the track at an average speed of 213 km/h, what minimum average speed must it have in the...

A 747 airliner reaches its takeoff speed of 188 mi/h in 33.6 s. What is the magnitude of its average accleration in m/s2?
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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?