Question

Choose the BEST answer to the following:

As a blinking light source approaching you gains in speed, you see the frequency of flashes

(a) increase.

(b) decrease.

(c) remain unchanged.

(d) None of these.

Expert Answer

Want to see the step-by-step answer?

Check out a sample Q&A here.

Want to see this answer and more?

Experts are waiting 24/7 to provide step-by-step solutions in as fast as 30 minutes!*

*Response times may vary by subject and question complexity. Median response time is 34 minutes for paid subscribers and may be longer for promotional offers.
Tagged in
Science
Physics

Related Physics Q&A

Find answers to questions asked by students like you.

Q: How would time period of a spring mass system change when taken to Moon?

A: The period of simple harmonic motion depends only on the  mass and spring constnat and is not depend...

Q: What is difference between forced and maintained oscillations? Give examples.

A: The amplitude of an oscillation will gets damped due to the motion in the medium. The medium offers ...

Q: The amount of air drag on an 0.8-N flying squirrel dropping vertically at terminal velocity is (a) l...

A: The weight of the object, and the air resistance on it have the same magnitude, when the object flie...

Q: Choose the BEST answer to the following: When the temperature of a strip of iron is increased, the l...

A: Materials with positive thermal expansion coefficient expands on heating. This phenomenon is called ...

Q: Choose the BEST answer to the following: Heat comes from the Sun to Earth by the process of (a) cond...

A: Step 1Conduction is the flow of heat from a body at higher temperature to a body at lower temperatur...

Q: A student draws the free body diagram shown below. Based on this diagram, the net force on the objec...

A: Length of the vectors gives magnitude. Along the vertical direction, the length of vectors represent...

Q: Two  charges exert a  4.50 N force on each other. What will the force (in N) become if the distance ...

A: Click to see the answer

Q: A 10-N force at an angle 45° above the horizontal has a horizontal component of about (a) 7 N. (b) 5...

A: The horizontal component of force at an angle above the horizontal is

Q: The edge of an aluminium cube is 10 cm long. One face of the cube is firmly fixed to a vertical wall...

A: Given information:The side length of the aluminium cube (l) = 10 cm = 0.1 mThe mass of the attachmen...

Q: Consider the following 3 pieces of the motion for a block that is initially at rest on a floor. (1) ...

A: While the hand is pushing the block and the block is still at rest, the acceleration of block is in ...

Q: Choose the best answer to the following: A completely submerged object always displaces its own (a) ...

A: Answer: ai,e weight of the fluid.

Q: At what temperature the kinetic energy of gas molecules is zero?

A: The kinetic energy of gas molecules is directly proportional to the temperature.

Q: Choose the BEST answer to the following: Hot sand cools off faster at night than vegetation. Compare...

A: Specific heat capacity is the amount of heat energy needed to increase the temperature of a material...

Q: 2. Using data from Table, calculate the daily energy needs of a person who sleeps for 8.00 h, walks ...

A: The table shows the energy consumption rate for various activities:

Q: The position of an object moving along x-axis is given by x = a + bt2 where a= 8.5 m, b = 2.5 m s-2 ...

A: Velocity is the time derivative of displacement of the object. The magnitude of velocity id given by

Q: Does a simple pendulum in a lift moving downwards with an acceleration g execute simple harmonic mot...

A: The time period of a pendulum executing simple harmonic motion is given by:

Q: I need help understanding the problem and solution

A: (2)The given position of the object as a function of time is,

Q: Choose the BEST answer to the following: When a diver points a flashlight upward toward the surface ...

A: Answer: bi,e passes into the air above.

Q: Choose the best answer to the following: The nucleus of an electrically neutral iron atom contains 2...

A: The atomic representation of iron is

Q: Choose the BEST answer to the following: The equilibrium rule, Σ F = 0, applies to objects (a) at re...

A: Click to see the answer

Q: Romeo is throwing pebbles gently up to Juliet's window, and he wants the pebbles to hit the window w...

A: Click to see the answer

Q: A girl is swinging in a swing in a sitting position. How will the period of the swing affected if sh...

A: Consider the swinging as similar to a simple pendulum.The relation between the time period and the l...

Q: Read the following two statements below carefully and state, with reasons, if it is true or false.(a...

A: (a)False.

Q: Choose the BEST answer to the following: The difference between dc and ac in electrical circuits is ...

A: Answer: ai,e steadily in one direction.

Q: Car A uses tires for which the coefficient of static friction is 1.1 on a particular unbanked curve....

A: Click to see the answer

Q: A hand pushes a book against a wall? Both the book and the hand are at rest. Select two forces in th...

A: When a hand pushes a book against a wall and both are at rest, there will be action and reaction for...

Q: Define average speed and average velocity.

A: As we know, that the speed is rate of change of distance travelled by an object and velocity is rate...

Q: What is kinetic energy of gas molecule per degree freedom?

A: Click to see the answer

Q: Can you explain please

A: The relation between sound intensity level ‘L’ in decibels and the intensity of ultrasound is given ...

Q: On what factors does the energy of a simple harmonically vibrating particle depend?

A: Write the expression for the energy of a simple harmonic oscillator.

Q: A rigid bar of mass 25 kg is supported symmetrically by three wires each 2.5 m long. Those at each e...

A: The expression for the Young’s modulus,

Q: A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls ...

A: Click to see the answer

Q: A jet airplane travelling at the speed of 500 km h-1 ejects its products of combustion at the speed ...

A: Given

Q: How does frequency and period relate to each other?

A: Frequency is defined as the number of occurrences of same event, and time period is the time after w...

Q: If a mass is hanging from a vertical spring is above the equilibrium point, which way does the net f...

A: As when a particle is oscillating, the direction of net force on the particle is always apposite to ...

Q: Choose the best answer to the following: When wind speeds up as it blows over the top of a hill, atm...

A: Air pressure decreases when a person go up in height.

Q: Choose the BEST answer to the following: The direction of natural processes is from states of (a) hi...

A: The "second law of thermodynamics" describes the direction of heat flow in natural processes.

Q: The actual frame size of "35-mm" film is 24 mm x 36 mm. You want to take a photograph of your friend...

A: The equation for the magnification is given by,

Q: Two blocks connected by a cord passing over a small, frictionless pulley rest on frictionless planes...

A: The equation for the net force of the both block is,

Q: Compute the fractional change in volume of a glass slab, when subjected to a hydraulic pressure of 3...

A: Click to see the answer