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A 3.4-m-tall, 40-cm-diameter concrete column supports a 2.0×105kg load, By how much is the column compressed
a little girl and her father are both playing on a merry go round in the park. what is the average angular velocity of the father
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 36 cans of soda which are warm at 81.7°F. how much ice needs
A geiger-muller tube is a type of gas-filled radiation detector. It can detect particles like X-rays, alpha particles and beta rays (electrons). what is the density of the gas in this geiger tube
You drop a 297-g silver figure of a polar bear into the 203-g aluminum cup of a well-insulated calorimeter containing 257 g of liquid water at 21.7°C. What is the final temperature of the water,
If the speed of a particle is increased by a factor of 10, by what factor is its momentum changed, By what factor is its kinetic energy changed
a satellite orbits the earth a distance of 1.50x10^7m above the planet's surface and takes 4.89 hours for each revolution about the earth. what is the acceleration of this satellite
A fishing line has attached to it a hollow plastic float 2.65 cm in diameter and having a mass of 1.50 g. Find the mass of a lead weight
A Carnot engine works between temperatutes T1 = 495K and T2 = 302K. What is the Carnot coefficient of performance, KC, of the refrigerator
A small box of mass 10 kg is placed on top of a large box with a mass 4 times that of the small box. find the magnitude of the frictional force acting on the small box
If 1800J of heat are added to a 190-g object, its temperature increases by 10o C. What is the heat capacity of this object
An electron and a proton are each accelerated through a potential dierence of 10.0 MV. Are the particles moving at relativistic speeds
What angular velocity would be required to give a rotating object of mass 25 kg and a radius of 2 m a centripetal force of 50 N
A 3.60 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest. What is the mass of the second sphere
A 60 kg skier skis a distance of d=200 m down a q=15o incline starting from rest. His speed at the bottom of the hill is 5 m/s. What was the NET work done on the skier
A 6 kg mass is attached to a spring with a spring constant k=20 N/m. The spring is stretched 50 cm and released at t=0s. What is the period of the mass-spring system
A 20 g bullet inelastically collides with a 3 kg wooden block at rest. find How much energy is lost in the collision
Under some circumstances, a star can collapse into an extremely dense object made mostly of neutrons and called a neutron star. If the original star rotated once in 35 days, find the angular speed of
A dentist's drill starts from rest. After 3.50 s of constant angular acceleration it turns at a rate of 2.7 x 104 rev/min. Find the drill's angular acceleration
A race car starts from rest on a circular track of radius 490 m. The car's speed increases at the constant rate of 0.740m/s2. find the speed of the race car
A 1.2kg block slides along a frictionless surface at 1.5m/s . A second block, sliding at a faster 4.8m/s, what is the mass of the of the second block
You shoot a cannon with initial velocity 62.3 m/s at an angle 67 degrees with respect to the level field on which the cannon sits. How far does this cannonball go on level ground
A small, 100g cart is moving at 1.70m/s on an air track when it collides with a larger, 3.00kg cart at rest. what is the speed of the large cart after the collision
A 2.3 kg pendulum bob is pulled out such that its center of mass is 0.26 m above its lowest point and released. What is the gravitational potential energy of the pendulum
A 30 kg child is sitting on the outer edge of a 100 kg carousel with a radius of 2.0 m. What is the moment of inertia of the carousel and child