PHYSICS
HIGH SCHOOL

Answer:

Answer and explanation:

The answer to this task is as follows:

Four charges are the corners of a square with B and C on opposite corners. Charges A and D on the other two corners have equal charge while both B and C have a charge of +1.0 C. The charge on A so that the force B is zero is -0.35C

COLLEGE

An object on the end of a spring with spring constant k moves in simple harmonic motion with amplitude A and frequency f. Which of th following is a possible expression for the kinetic energy of the object as a function of time t? (A) kA2 sin2 (2Tft) (B) AkA cos (2T ft) (C) kA sin (2n ft) (D) kA cos (2Tt ft)

Explanation:

It is given that, an object on the end of a spring with spring constant k moves in simple harmonic motion with amplitude A and frequency f.

The equation of a particle executing SHM is given by :

.........(1)

Where

A is the amplitude of the wave

Differentiating equation (1) wrt t as :

.........(2)

The kinetic energy of the particle is given by :

.........(3)

We know that,

So, equation (3) becomes :

or

So, the kinetic energy of the object is . Hence, this is the required solution.

HIGH SCHOOL

What do ocean waves and sound waves have in common?

Since they are both examples of moving waves, they both transmit energy.

Answer:

Both are mechanical waves.

Explanation: Plato user

HIGH SCHOOL

Will Upvote!! If the mass of two objects increases, the force of gravity between them

increases

decreases

remains the same

could increase or decrease, depending on the shape of the objects

The answer is the force of gravity between them increases.

COLLEGE

The equation for the doppler shift of a sound wave of speed v reaching a moving detector is f ? = f v + vd v ? vs , where vd is the speed of the detector, vs is the speed of the source, f is the frequency of the source, and f ? is the frequency at the detector. if the detector moves toward the source, vd is positive; if the source moves toward the detector, vs is positive. a train moving toward a detector at 29 m/s blows a 310 hz horn. what frequency is detected by a stationary train? the velocity of sound is 343 m/s.

Assuming the speed of sound v = 343 m/s (the 20 C dry-air value), fd = 295*(343+0)/(343+33) = 269.11 Hz.

Sloppily stated question. The train moves away in which direction, the same "away from the detector" direction as the emitting train? Which train is the 1st one, the stationary one or the 33 m/s one? Is the 21 m/s absolute or relative to the moving train? You need to find its absolute velocity and substitute it for the 0 in the equation for A.

Sloppily stated question. The train moves away in which direction, the same "away from the detector" direction as the emitting train? Which train is the 1st one, the stationary one or the 33 m/s one? Is the 21 m/s absolute or relative to the moving train? You need to find its absolute velocity and substitute it for the 0 in the equation for A.