What is “dark energy”? What is “dark matter”? Why do some scientists think it is everywhere, while Houston thinks it is a lazy crock of….?

Q: A typical television dissipates 275 W when it is plugged into a 120 V outlet. a). Find the…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A sonar signal of frequency 1 x 10^6 Hz has a wavelength of 1.5 mm in water. a) What is the speed of…

A: The speed of sonar wave in water was calculated by v = fλ where, λ is wavelength of the wave f is…

Q: Analyze the graphs below. Which graph shows the relationship between wavelength and frequency? A D…

A: To select : The graph showing the correct relationship between wavelength and frequency

Q: 11. Potassium is illuminated with ultraviolet light of wavelength 2500 A. Using the work function…

A: The solution of this question is given below...

Q: Work and Energy 4. At her highest point, a girl on the swing is 6.5ft. Above the ground, and at her…

A: We have a girl of mass say m whos is on a swing which has a highest point at h1=6.5 ft and a lowest…

Q: VA m/s SA с T S 10 SB

A:

Q: A small weight hangs from a string attached to the rearview mirror of a car accelerating at the rate…

A: From Newton’s 2nd law, we can write an equation for the forces acting horizontally on the weight.…

Q: In the diagram below, label the following: the lens as either concave or convex focal point light…

A: 2-Convex lens  It is shapes similar to convex lens

Q: In Canada, the four primary sources of power generation are fossil fuels, hydroelectricity, wind…

A: As of 2011, The largest source of generation of power in Canada is hydroelectricity that is power…

Q: The following charges are located inside a submarine: 5.00 μC, -9.00 μC, 27.0 μC., and – 84.0 μC.…

A: Disclaimer: “Since you have asked multiple question, we will solve the first question for you. If…

Q: A sonar signal of frequency 1 x 10^6 Hz has a wavelength of 1.5 mm in water. a) What is the speed of…

A: Given  frequency(f)=106 Hz wavelength(λ)=1.5 mm

Q: A girl with a mass of 52kg rides a skateboard with a mass 1.5kg. She uses her foot to apply a force…

A: Given: The mass of the girl is 52 kg. The mass of the skateboard is 1.5 kg. The acceleration of the…

Q: 2. Suppose that the switch in an RC circuit with Eo = 0 is closed at time t = 0 when the capacitor…

A:

Q: Two charges are placed 2.50 cm and 5.00 cm from a third charge .The charges are: charge1 =…

A:

Q: A 2500 kg car A moving at 20.0m/s collides and locks together with a 1500 kg car B at rest at a stop…

A: in this question  we apply conservation of momentum.

Q: You have exactly 4 minutes 40 seconds to get to your next class on time and that classroom is 428 m…

A:

Q: What is the vector product of the following vectors? Show your solution A = 3i+5j - 2k and B = −4i +…

A:

Q: If the wavelength of an electron is 450 nm, how fast is it moving? A. 0.78 c. B. 1616.42 m/s... C.…

A:

Q: 9 V R₁ M *3Ω 502 10 Ω 2 4 R3 1. What is the value of V₁? a. 6 V b. 8 V c. 9V 2. What is the value of…

A: Given circuit with three resistors and one battery.

Q: Problem Solving A motorcyclist is trying to leap across the canyon by driving horizontally off a…

A: The given values are listed below. v0=38 m/sh0=70 mhf=35 m

Q: Work and Energy 7. A 5000kg elevator starts from rest accelerates uniformly to a constant speed of…

A:

Q: Which of the following describes how the temperature of an electric stovetop element is increased by…

A: Heat =i2R∆ti =current flowR= resistance of the coil∆t = time taken So, the heat is proportional to…

Q: A Ferris wheel is 27 meters in diameter and completes 1 full revolution in 12 minutes. revolves…

A: Diameter, d = 27 m Radius, r = d/2 = 13.5 m One revolution in 12 minutes.  Distance of ferris wheel…

Q: A beam of 150 eV electrons are directed at normal incidence onto a crystal surface. The m = 2…

A: According to the Bragg's law, 2d×sinθ = mλ where, d = spacing of the crystal layers θ = incident…

Q: 8 An airplane travels 300 m. down the runway before taking off. If it accelerates uniformly and…

A:

Q: Which of the following does NOT demonstrate Newton's first law of motion?     A bicycle parked on a…

A:

Q: 5. A rectangular loop of wire that is 35 cm wide and 15 cm long is placed in a region where the…

A: The magnetic flus through the loop will be  Flux = B×A×cosθ where B is magnetic field and A is area…

Q: On an electric stovetop, the elements consist of a thick metal strip/wire that is coiled and may or…

A: Electrons flow in wires in stove .

Q: A 12 kg package rests on one of its sides on a horizontal surface. The area of the side is 0.09-m2.…

A:

Q: When a standard basketball released from a high tower, it will accelerate and reach a terminal…

A: This question is based on Terminal speed concept from Mechanical properties of fluids topic.…

Q: The horn of a car attracts the attention of a stationary observer. If the car is approaching the…

A: Given  speed of source(vs)=16.67 m/s frequency of source(f)=512 Hz speed of sound(v)=343 m/s speed…

Q: 3. An automobile has a power output of 3.5hp. When it pulls a cart with a force of 540N, what is the…

A: Given  Power output , P = 3.5 hp = 3.5×745.7 W = 2609.95 W  Force , F = 540 N

Q: Show why the induced current in a wire can only be flowing in a particular direction.

A: Electromagnetic induction is the phenomenon of inducing a current in  conductor placed in a varying…

Q: A beam of protons that all have the same energy scatters from atoms that have a spacing of 0.150 nm…

A:

Q: How many kilograms of -5°C ice per minute will melt and evaporate to steam after adding a total of…

A: There will be two basic of this consumption of heat (1) to raise the temperature (2) consumption of…

Q: A 0.623 kg. basketball is dropped from the rooftop of a building. If it took the ball 3.5 seconds to…

A:

Q: 23. | In Figure P7.23, force F₂ acts half as far from the pivot as F₁. What magnitude of F2 causes…

A:

Q: Which of the following is caused by constructive interference? A standing wave B dispersion с…

A: Solution:

Q: Estimate the average force exerted by a shot-putter on a 7.0kg shot if the shot is moved through a…

A:

Q: Why is the Diesel cycle more efficient (in thermodynamic terms) than the Otto cycle? a) Because the…

A: Diesel engines have more efficient than the otto cycle .

Q: Two wires are separated by some distance d. Assume that the wires are infinitely long and they are…

A:

Q: An object is undergoing simple harmonic motion with frequency f = 9.7 Hz and an amplitude of 0.12 m.…

A:

Q: A block weighing 200N rests on a inclined plane upward to the right at  slope of 4 vertical and 3…

A:

Q: What is the equivalent resistance of the following circuit? 2Ω 3Ω 6Ω 6Ω + .8 Ω

A:

Q: Which of the following devices performs heat transfer using work, with the goal of maintaining the…

A: (a) An internal combustion engine The internal combustion engine is an engine in which the burning…

Q: If a person has $5, how long could he or she play a 200 W stereo if electricity costs $0.15 per KWh?…

A: Given a person has $5 200 W stereo electricity costs = $0.15 per KWh. We have to calculate how long…

Q: A glass of lemonade with a temperature of 40°F is placed in a room with a constant temperature of…

A: Given: at t=0 temperature of lemonade = 400F room temperature =700F after one hour tem. of lemonade…

Q: 4 What is the sum of the following vectors? Show your solution A = 3i + 5j - 2k and B = −4i + 2j +…

A: Vector are added by vector additions method which are 1. Triangle rule of vector addition 2.…

Q: What is the diameter of a 1.00-m length of tungsten wire whose resistance is 0.12 Ω

A:

Q: Q2\ A. Give the Newton's Three Laws of Motion. B. Find the sum and angle of two displacement vectors…

A: 1) Three laws of motion: Newton developed how motion behaves.  2) given: displacement vectors  A =…

Special Relativity

The theory of special relativity discusses how space and time are related to objects traveling along a straight line at a constant speed. Simply stated, as an object reaches the speed of light, its mass becomes infinite and it is unable to move faster than light. This interstellar speed limit has been the topic of much debate in astronomy, and also in science fiction when people consider how to fly over large distances.