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If this scale was taken to a planet that has a mass 4 times larger than the earth and a radius 4 times greater than the earth, what would the reading on the scale be when the mass was suspended on i
A 260 g block on a 54.0 cm-long string swings in a circle on a horizontal, frictionless table at 55.0 rpm What is the speed of the block?
A model rocket is launched vertically at v0 =55 m/s. It accelerates at 2.2 m/s2 until the engine stops at 150 m above ground. (a) What is the maximum height the rocket reaches? (b) How long is the r
What are molecular clocks and how do they help determine relationships between species?
Two objects attract each other gravitationally with a force of 2.8×10-10 when they are 0.65 apart. Their total mass is 4.6 .Find their individual masses.
In other words, what are the magnitudes of the components of the ship's displacement vector in the directions (a) due east and (b) due north?
Activation of T cells requires that antigens be presented from antigen-presenting cells
A 69-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.20. What would be the magnitude of the acceleration
A race car starts from rest on a circular track. The car increases its speed at a constant rate at as it goes once around the track. Find the angle that the total acceleration of the car makes-with
A runner accelerates to a velocity of 5.29 m/s due west in 3 s. His average acceleration is 0.641 m/s2, also directed due west. What was his velocity when he began accelerating?
How many kilograms of water at 25 degrees celcius must come to thermal equilibrium with a 3.0kg gold bar at 99 degress celcius in order to lower the bar's temperature to 47 degrees celsius?
Assuming that the pass was thrown at the optimal 45 angle, what was the speed at which the ball left the quarterback's hand?
A trajectile, of mass 20 g, traveling at 350 m/s, strikes a steel plate at an angle of 30-degrees with a plane of the plate. It ricochets off at the same angle, at a speed of 320 m/s. What is the m
The collision is not head-on. After the collision, the two pucks fly apart with the angles shown in the drawing. Find the speed of Puck A and puck B.
A 10.0 mu F capacitor initially charged to 30.0 mu C is discharged through a 2.20 kOmega resistor. How long does it take to reduce the capacitor's charge to 5.00 mu C?
Three blocks of mass 3m, 2m, and m are connected by strings and pulled with constant acceleration a. What is the relationship between the tension in each of the strings?
A 550 block slides along a frictionless surface at a speed of 0.35 . It runs into a horizontal massless spring with spring constant 54 that extends outward from a wall. It compresses the spring, the
An angle theta from the vertical and rolls without slipping. What is the angular velocity of the sphere when it passes the bottom of the hemisphere?
Explain briefly the difference between equilibrium, steady-state current, and the behavior of an LC circuit
A 4.0- block is stacked on top of a 12.0- block, which is accelerating along a horizontal table at = 5.2 . Find minimum coefficient of friction.
A car of mass = 800 traveling at 45.0 enters a banked turn covered with ice. The road is banked at an angle , and there is no friction between the road and the car's tires. What is the radius of the
A 30,000 kg railroad car initially traveling to the right at 15 m/s collides inelastically with a 20,000 kg railroad car initially traveling to the left at 5 m/s. The cars stick together. What is t
The angle between the handle and the ground is 60 degrees. Find the force applied on the handle if its horizontal component is 300 N.
A gold puck has a mass of 12 kg and a velocity of 5i-4j m/s prior to a collision with a stationary blue puck whose mass is 18 kg. After the collision ,the blue puck has a velocity of 2i-2j. What is
If the ball is released from rest at a height of 0.80 above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? Assume the ball