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The initial speed of the box at the bottom of the incline is 1.50 m/s. How far does the box travel along the incline before coming to rest?
If it takes 2.80 ? 10-13 s for a nitrogen molecule to hit a wall and rebound with the same speed but moving in an opposite direction (assumed to be the negative direction), what is the average accel
The coefficient of kinetic friction between the block and the ramp is 0.76. Use energy conservation to find the distance the block slides before coming to rest.
A weight (with a mass of 86 kg) is suspended from a point near the right-hand end of a uniform boom with a mass of 78 kg. To support the uniform boom a cable runs from this same point to a wall (the
Calculate the change in kinetic energy ΔT, potential energy ΔU, and total energy ΔE of the charge as it travels from one plate to the other. Assume the initial speed of the electro
An electron is accelerated by a uniform electric field (1000V/m ) pointing vertically upward. Use Newton's laws to determine the value of electron's velocity after it moves 0.30cm from rest.
A car moves along a road in such a way that the distance x, travelled in a time t, is given by. Derive an expression for the velocity, v, as a function of time. Express your answers in terms of v, a,
A shot putter releases the shot some distance above the level ground with a velocity of 13 m/s and 51o above the horizontal. The shot hits the ground 2.08 s later. You can ignore air resistance. Wh
Answer in units of m. Find the average velocity of Car A during 5.0 s. Find the average velocity of Car B during 5.0 s. Answer in units of m/s.
The wire, and when it lies along the +y axis [i.e., the current is directed in the +y direction], the force is F = (2.4i - 4.9k) N. Find B.
The scale reads 11.81 N when the statuette is suspended in air, and 11.19 N when the statuette is completely submerged into the water. Find the volume of the statuette
A stone is thrown vertically upward with a speed of 11.3m/s from the edge of a cliff 75.2m high How much later does it reach the bottom of the cliff?
A 60.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.28 102 m/s. What is the initial total mechanical energy of the projectile?
A roller-coaster car moves 203 ft horizontally and then rises 143 ft at an angle of 30° above the horizontal. It then travels 143 ft at an angle of 40° downward. What is its displacement fr
21.5 degrees and likewise the maximum angle of descent for safety is 21.5 degrees, how long (in seconds) will the astronaut trainees experience zero gravity?
Assuming that each cubic centimetre of water has a mass of exactly 1g. Find the mass of one cubic meter of water in kg.
As a bacterium swims through water it propels itself with its flagella so as to overcome the frictional drag forces and move at, more or less, constant velocity of 100 micrometer/s for periods of ti
What constant speed must the second swimmer have in order to catch up to the leader at the end of the pool?
The launch speed of B is twice that of C. Neglecting air resistance, find the ratio of the maximum height of B to that of C and the ratio of the range of B to that of C.
A suitcase drops out of the luggage compartment. How far from the dog will the suitcase land? You can ignore air resistance.
A shopper pushes a cart 49 m south down one aisle and then turns 90.0° west. What is the largest possible displacement of the shopper? m ° counterclockwise from west
How much work must Denise do to drag her basket of laundry of mass 5 kg a distance of 3 m along a floor, if the force she exerts is 20 N at an angle of 60.0 with the horizontal?
Suppose you want to make a scale model of a hydrogen atom. For the nucleus you choose a small ball bearing. What would be the radius (mm) of the sphere representing the earth?
A rifle bullet with a muzzle speed of 300m/s is fired directly into a special dense material that stops the bullet in 28.0cm . Assuming the bullet's deceleration to be constant, what is its magnitude?
What is the free energy cost for exposing a hydrophobic molecule per area? Answer this in units of kBT/nm2. (d) Using your results in (a) or (b), explain why oil and water do not mix (at room temper