freeman

Explain what characteristics make convex spherical mirrors applicable for store monitoring and concave spherical mirrors applicable as flashlight reflectors.

In solar heating applications, heat energy is stored insome medium until it is needed (e.g., to heat a home at night). Should the medium have a high or a low specific heat? Suggest a substance that would be appropriate for use a heat-storage medium, and explain its advantages.

A village maintains a large tank with an open top, containing water for emergencies. The water can drain from the tank through a hose of diameter 7.00 cm. The hose ends with a nozzle of diameter 2.40 cm. A rubber stopper is inserted into the nozzle. The water level in the tank is kept 7.50 m above the nozzle.

(a) Calculate the friction force exerted by the nozzle on the stopper.

(b) The stopper is removed. What mass of water flows from the nozzle in 2.00 h?

(c) Calculate the gauge pressure of the flowing water in the hose just behind the nozzle.

The maximum distance from the Earth to the Sun (at our aphelion) is 1.521 1011 m and the distance of closest approach (at perihelion) is 1.471 1011 m. Assume the Earth's orbital speed at perihelion is 3.027 104 m/s. (Ignore the effect of the Moon and other planets.)

(a) Determine the Earth's orbital speed at aphelion

(b) Determine the kinetic and potential energies of the Earth-Sun system at perihelion

(c) Determine the kinetic and potential energies at aphelion

(d) Is the total energy constant? (Yes or No)

A particle rotates counterclockwise in a circle of radius 6.00 m with a constant angular speed of 8.00 rad/s. At t = 0, the particle has an x coordinate of 1.00 m and is moving to the right.

The x coordinate as a function of time x = 6cos(8.00t-1.403)

The x components of the particle's velocity as a function of time is v= - 48sin(8.00t-1.403)

The x component of the particle's acceleration as a function of time is a= - 384cos(8.00t-1.403)

(a) What is the speed of the rotating particle?

(b) At t = 0 what is the direction of the velocity vector?

(c) What is the x component of this velocity at t = 0?

A swimming pool has dimensions 34.0 m 8.0 m and a flat bottom. When the pool is filled to a depth of 1.50 m with fresh water

(a) what is the force caused by the water on the bottom?

(b) On each end? (The ends are 8.0 m.)

(c) On each side? (The sides are 34.0 m.)

(a) Find the angular speed of a planet that rotates once every 20.0 hours.

(b) As this planet turns toward the east, a person on its surface sees the sky turning toward the west at this same rate. Suppose two observers are 116° in longitude apart and view the Pleiades star cluster. How much time elapses after the Pleiades set for one observer until these stars fall below the western horizon for the other observer?

A 14680 N automobile has a wheel base (the distance between the axles) of 3.10 m. The center of mass of the automobile is on the center line at a point 1.30 m behind the front axle. Find the force exerted by the ground on each wheel.

(a) each front wheel

(b) each rear wheel

A disk 8.05 cm in radius rotates at a constant rate of 1280 rev/min about its central axis.

(a) Determine its angular speed.

(b) Determine the tangential speed at a point 2.93 cm from its center.

(c) Determine the radial acceleration of a point on the rim.

(d) Determine the total distance a point on the rim moves in 2.10 s.

a) Find the angular speed of a planet that rotates once every 28.5 hours.

(b) As this planet turns toward the east, a person on its surface sees the sky turning toward the west at this same rate. Suppose two observers are 125° in longitude apart and view the Pleiades star cluster. How much time elapses after the Pleiades set for one observer until these stars fall below the western horizon for the other observer?

1. What are rotational analogs of force, mass, and Newton’ second law?

2. Define moment of inertia. How is torque related to moment of inertia?

3. Describe a method by which the moment of inertia of a body may be experimentally determined.

4. How is the frictional torque of a rotating system experimentally determined or compensated for?

5. Explain how tangential and angular velocities and accelerations are related to one another.

6. A solid cylindrical object has a mass of 2.0kg, a diameter of 0.10m, and a length of 0.18m. What is the moment of inertia of the body about an axis along the axis of the cylinder? Make a sketch and solve using integration

Expressing the kinetic energy in terms of momentum [i.e., K = 1/2mv2 = p2/(2m)], prove using symbols, not umbers, that the fractional loss during the collision is equal to M/(m + M).

What is the total energy of the system when the pendulum is at angle of 15 degrees from the vertical? What is the kinetic energy when theta = 15 degrees?

This question is in my lab question about Linear momentum

Please explain in terms of conservation of momentum.

just information about Location, Climate, Diet, Physical aspects, Mental/ attitudes of the animal

please give me the accurate information. Thank u so much ^^

giống như ở 1 số tiệm cắt tóc có cái chương trình đó, ghép kiểu tóc vào khuôn mặt trước xem có hợp hay ko. rồi mới quyết định cắt tóc.

ah, tiện thể mình muốn hỏi trag web nào có nhiều kiểu tóc ngắn, lẫn dài luôn. Bạn nào bít xin help dùm, đa tạ nhiều lắm.

if chỉ có vài bài thôi cũng được, mình cần bài đầu fim và cuối fim nhất

thanks