Physics Force & Laws Of Motion Level: Misc Level
A force of 250 N is applied to a hydraulic jack piston that is 0.01 m in diameter. If the piston which supports the load has a diameter of 0.10 m, approximately how much mass can be lifted by the force? Ignore any difference in height between the pistons.
Physics Force & Laws Of Motion Level: Misc Level
A woman is enjoying a tropical drink while lying on a beach. The acceleration due to gravity at her location is 9.85 m\s2 What gauge pressure must exist in the woman s mouth if she is drinking through a straw extending 0.085 m above the surface of the drink? Note assume the drink has a density of 1015 kg \m3
Physics Force & Laws Of Motion Level: Misc Level
A submarine is operating at 100. 0m below the surface of the ocean. If the air inside the submarine is maintained at a pressure of 1.0 atmosphere, what is the magnitude of the force that acts on the rectangular hatch 2.0 x 1.0 m on the deck of the submarine?
Physics Force & Laws Of Motion Level: Misc Level
An ice cube, p = 917 kg / m3 , is sliding down a frictionless incline as shown in the drawing The sides of the cube each have a length of 0. 75 m. What pressure does the cube exert on the incline?
Physics Properties Of Matter Level: Misc Level
The average density of the material in intergalactic space is approximately 2.5* 10-27 kg \m3. What is the volume of a gold sample, P= 19300 kg \ m3, that has the same as 8.0 * 1024 m3 of intergalactic space?
Physics Properties Of Matter Level: Misc Level
The density of mercury is 1.36 * 104 kg \ m3 . What is the mass of a 4. 00 * 104 -m3 sample of mercury?
Mathematics Algebra Level: Misc Level
Walking beside you, your friend takes 50 strides per minute while you take 48 strides per minute. If you start in step, when will you be in step again?
Physics Electromagnetic Waves Level: Misc Level
Astronomers find that light emitted by a particular element at one edge of the Sun has a slightly higher frequency than light from that element at the opposite edge. What do these measurements tell us about the Sun's motion?
Physics Properties Of Matter Level: Misc Level
You have probably observed that a steady stream of water flowing out of a faucet gets smaller the farther it gets from the faucet. Why does this happen?
Physics Properties Of Matter Level: Misc Level
High cholesterol in the blood can cause fatty deposits called plaques to from on the walls of the blood vessels.Suppose a plaque reduces the effective radius of an artery by 25 %. By what percentage does this partial blockage affect the speed of the blood through the artery ?
Physics Properties Of Matter Level: Misc Level
To stir a mixture of liquids consistently and gently, a biologist designs a simple mechanical system consisting of a horizontal spring attached to a beaker on the slippery Teflon surface. She pours two liquids with a total mass of 100 - g into the beaker, which has a mass of 50.0 -g. She then pulls on the beaker, stretching the spring. On releasing the beaker from rest ( t =0), she sets the system in motion with an amplitude of 5. 00- cm. To avoid spilling and to promote gentle mixing, the frequency is designed to be exactly 0.300 -Hz.
(a) What is the required spring constant?
(b) What is the displacement of the beaker from equilibrium at time t = 2.00 s?
Physics Properties Of Matter Level: Misc Level
A garage lift has input and output ( lift ) pistons with diameters of 10 - cm, respectively. The lift is used to hold up a car with a weight of 1.4 x 10 ^ 4 N.
(A) What force is applied to the top of the input piston?
(b) What is the pressure applied by the water column to the bottom of the input piston?
Physics Force & Laws Of Motion Level: Misc Level
A 2 - kg block lies on top of a 5 - kg block which is at rest on a horizontal surface. A horizontal, unstretched spring ( k= 45 N /m) is attached to the top block and to the wall. The coefficient of kinetic friction between the two blocks and the surface is 0.25 and the coefficient of static friction between the two blocks is 0.45. A horizontal force is applied to the bottom block that keeps the blocks moving with constant velocity. By what distance is the spring compressed when the top block begins to slide? What is the magnitude of the applied force at the moment?
Physics Force & Laws Of Motion Level: Misc Level
A 5 - kg mass is attached to the end of a spring ( k = 225 N/m). The mass is allowed to pull a distance A to the right of the equilibrium position and then released. The mass is allowed to move without friction.Five seconds after the mass is released, it is located at a distance of 0. 105 m to the left of the equilibrium position.
a) Find A.
b.) What is the maximum acceleration of the mass?
c.)find the period of oscillations.
d.) What is the velocity of the mass 2. 5 seconds after the mass is released?
Physics Properties Of Matter Level: Misc Level
How high should the pressure head be if water is to come from a faucet at a speed of 7.33 m/s ? lgnore viscosity.
