Physics Answers

A block attached to a spring oscillates in simple harmonic motion along the x-axis between the two extremes, x = 10 cm and x = 30 cm. The block goes from one extreme to the other in 0.25 s. Its amplitude and frequency are:

How does the elapsed time for a process seem to be longer, an observer moving with the process or observe moving relative to the process?which observer measures proper time?explain your answer

A capillary tube with an inside diameter of 𝟓𝟒𝟎 𝝁𝒎 can support a 𝟏𝟎𝟎 𝒎𝒎 column of liquid that has a density of 𝟏𝟑𝟓𝟎𝟎 𝒌𝒈𝒎−𝟑. If 𝒉 = 𝟎.𝟏 then is it possible to find the surface tension of the liquid? If not, then write down the reason.

Vehicles like cars, trucks and jeepneys have seatbelt to be used by the driver for the safe driving and seats were also have head rest. What is the importance of these safety features found in the vehicles? Apply the first law of your answer

a 250-N crate is pulled along a horizontal sidewalk at a constant speed by a rope which makes an angle of 40° with the sidewalk. If a force of 150 N is applied on the rope, what is the coefficient of the sliding friction?

. Illustrate the stress and strain of solids.

A projectile is fired straight upward from the Earth's surface at the south pole with an initial speed equal to one third the escape speed. Ignoring air resistance, determine how far from the center of the earth the projectile travels before stopping momentarily.

The moon is 3.9 × 10⁵ km from Earth's center and 1.5 × 10⁸ km from the Sun's center. The masses of earth and the sun are 6.0 × 10²⁴ kg and 2.0 × 10³⁰ kg, respectively. Find the ratio of the gravitational fields due to Earth and the Sun at the center of the Moon.

Two blocks, with masses 4.00 kg and 8.00 kg are connected by a string and slide down a

30 inclined plane (see figure). The coefficient of kinetic friction between the 4.00 kg block and the

plane is 0.25; that between the 8.00 kg block and the plane is 0.35. Calculate

a) the acceleration of each block

b) the tension in the string

The planet Saturn has about 100 times the mass of the earth and is about 10 times farther from the sun than the earth is. Compared to acceleration of the earth caused by the sun's gravitational pull, how great is the acceleration of saturn due to the sun's gravitation?