Other Physics Answers

At a distance of 3.8 m from a siren of an ambulance, the sound intensity is 3.6 × 10-2 W∙m-2 . Assuming that the siren radiates sound uniformly in all directions, find the total power radiated.

An elevator weighing 4000 Ib attains an

upward velocity of 4 m/sec in 3 sec with

uniform acceleration. Find the apparent

weight of a 40 kg man standing inside the

elevator during its ascent.

A mass 3.00kg is attached to an ideal spring with k=200N/m, if the velocity of the body at 0.25meters is 2.3m/s. Find the amplitude and the maximum velocity

A kid stands 6.00 m from the base of a flagpole which is 8.00 m tall. Determine the magnitude of the displacement of the brass eagle on top of the pole with respect to the youngster’s feet.

A heavy ball with a mass of 4.5 kg is observed to accelerate at a rate of 7.0 m/s2 . What is the size of the net force acting on this ball?

You might have had the experiment of being at a red light when, out of the corner of your eye, you see the car beside you creep forward. Instinctively you stomp on the brake pedal, thinking that you are rolling backward. What does this say about absolute and relative motion?

A particle with a charge of -1.24x10^8 C is moving with instantaneous velocity (1.49x10^4m/s) î +(-3.85x10^4m/s) ĵ.​ What is the force exerted on this particle by a magnetic field

(a) (1.40T)î+ (-2.30T)k̂

(b) (-1.25T)î+ (2.00T)ĵ + (-3.50T)k̂

Describe 3 time periods and explain the differences between the three.

Monochromatic light is incident on two slits separated by 0,03 m. The distance between antinodes is 0,000128 m. If the screen is 1,6 m from the slits, what is the wavelength of light? Write your answer in scientific notation or in decimal form

Temperature changes in seawater affect the speed at which sound moves through it. A wave with a length of 2.00 m, travelling at a speed of 1502 m/s, reaches a section of warm water where the speed is 1553 m/s. What would you expect the wavelength in the warmer water to be? Write your answer in meter and do rounding up to 2 decimal places.