A star is observed to move away from us at a speed of 2.9km/s.  How far is the star ? Express your answer in light years.

Q: 1. An object hangs from a spring with a constant stiffness of 40 N/m, and stretches it by 0.5 m.…

A: Given that An object hangs from a spring with a constant stiffness of (k) =40 N/m The spring…

Q: A wheel which is initially at rest starts to turn with a constant angular acceleration. After 4…

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Q: The figure sows a block and track system. All locations indicated by solid black lines are…

A: Given:-  We have provided a figure as  The mass of the block is m = 0.58 kg. The Coefficient of…

Q: In the figure below, the masses of each object are: m₁ = 1 kg, m₂ = 4 kg, m3 = 4 kg. The labeled…

A: Calculate the x coordinate of the center of mass.…

Q: A 79 kg bike racer climbs a 1100mm long section of road that has a slope of 4.3∘.  By how much does…

A: Given value--- mass = 79 kg.q length of road = 1100 mm. angle = 4.3 degree. We have to find--- By…

Q: Suppose your 44-mm focal length camera lens is 59 mm away from the image sensor in the camera. How…

A: Write the expression for the lens equation and substitute the corresponding values to calculate the…

Q: The radioactive isotope 243 Am, with a half-life of 432 y, is the active element in many smoke…

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Q: Two forces, of magnitudes F1 = 65.0 N and F2 = 35.0 NN, act in opposite directions on a block, which…

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Q: A trip around the edge of Australia is approximately 15,100km. If I drive at 40 miles per hour, how…

A: Given data:  Distance (d) = 15,100 km Speed (v) = 40 miles per hour Required: The time taken (t)

Q: Five capacitors are connected across a potential difference Vab as shown in the figure. Because of…

A: A capacitor is a device that stores electrical energy by accumulating electrical charges on the two…

Q: A metal wire of mass m = 24.1 mg can slide with negligible friction on two horizontal parallel rails…

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Q: Please refer again to the diagram. This time we have a charge of 4.54 x 10^-6 C moving at velocity…

A: Given data- Charge q=4.54×10-6 C Velocity v=3.78×105 m/s Magnetic field B=3.13 T Electric field…

Q: An object 1.65 cm high is held 3.25 cm from a person's cornea, and its reflected image is mea be…

A: Given   Height of object , h = 1.65 cm Height of image , hi = 0.175 cm Object distance , u = 3.25…

Q: So, what exactly is a collision?

A: Collision - basically it the event when one moving object strikes another moving or non moving…

Q: Two forces act on an object. One force has a magnitude of 10 N directed north, and the other force…

A: Given data:  Two forces acting on the object F1 = +10 N F2 = -2 N Required: The net force on object

Q: Points A and B are on opposite sides of a river. To find the distance between the points, a third…

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Q: A traveling wave is described by the equation below: y(x,t) = 5.6 sin(5.12t - 5.28x) All numbers are…

A: The equation of the traveling wave: y(x, t) =5.6 sin(5.12t - 5.28x)

Q: A stone is thrown downward with a speed of 20 m/s from a height of 15 m. (acceleration due to…

A: Given value--- initial speed = 20 m/s. height = 15 m. acceleration due to gravity = 10 m/s2.  We…

Q: Suppose the bond in a molecule is broken by photons of energy 5.0 eV. Submit Part B Value Request…

A: Given data: Energy of the photon (E) = 5.0 eV Required: The wavelength of the photons

Q: The potential difference across a resting neuron in the human body is about 79.0 mV and carries a…

A: Given data:  Voltage (V) = 79.0 mV Current (I) = 0.335 mA Required:  The power (P)

Q: Three resistors are connected in series: R1 = 11Ω , R2= 7 Ω and R3 = 20 Ω and is connected with a…

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Q: physics major is cooking breakfast when he notices that the frictional force between the steel…

A: Given data:  Frictional force (f) = 0.450 N Coefficient of kinetic friction (μ) = 0.04 Required: The…

Q: A proton is moving under the combined influence of an electric field (E = 1747 V/m) and a magnetic…

A: Given-               electric field (E) = 1747 V/m               magnetic field (B) = 1.37 T      ,…

Q: An ideal gas is brought through an isothermal compression process. The 5.00 mol of gas goes from an…

A: Given value--- number of mole = 5. initial volume of 223.1×10−6 m3 to a final volume of 105.2×10−6…

Q: A 150g baseball is thrown directly upwards with a velocity of 20.0m/s. 1.00 second later an 8.00g…

A: The mass of the ball: mball=150 g=0.15 kg The initial speed of the ball: uball=20.0 m/s The mass of…

Q: We archer shoots an arrow horizontal at 84m/s. When the arrow strikes the target 25m away, what is…

A: In the given question,  Horizontal initial velocity ux = 84m/s Horizontal distance moved by the…

Q: Verify the conclusion of Green's Theorem by evaluating both sides of each of the two forms of…

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Q: The mechanical energy (kinetic+potential) of the system of two colliding objects on a horizontal…

A: In Collision on a smooth surface represents Total Energy is conserved

Q: Shown in the figure below is a block and track system. All locations indicated by solid black lines…

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Q: How much heat is required to melt 30 kg of ice at 0°C to water at 10 deg * C ? The latent heat of…

A: Given data: Mass (m) = 30 kg Initial temperature (T0) = 0°C Final temperature (T) = 10°C Latent heat…

Q: A crane lowers a shipping container with a steel cable. The container moves down at a constant…

A: To find out about the tension in the cable, when the crane lowers a shipping container with a steel…

Q: Learning Goal: To understand the experiment that led to the discovery of the photoelectric effect.…

A: The energy of the electron is given by  E =W =qV --------(1) We know that from Planck's quantum…

Q: The radioactive element carbon-14 had a half-life of 5750 years. A scientist determined that the…

A: Write the expression for the activity. N=N0(12)tt1/2 Here, N is the final activity after time t, N0…

Q: Locate the centroid 2 of the area. Express your answer to three significant figures and include the…

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Q: A 183.6 kg uniform, horizontal beam is hinged at one end and at the other is supported by a cable…

A: Hh

Q: How much heat is necessary to change 10 g of ice at -20 into water at 20°C? The specific heat of…

A: Converting 10g ice at -20° to 0°  Heat Required = mass × specific heat × change in temperature  = 10…

Q: A particle of mass 25 g moves in an xy-plane such that the position vector is given by: r = 15t î+…

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Q: 7. Look at the map given below and then answer the questions: SMIT STREET HANI School MADIBA Garage…

A: i) To go to school from the shops: Go south from the shop along Eloff street, then head towards west…

Q: Consider the situation in the figure - a student diver in a pool and an instructor on the edge,…

A: Given:apparent angle, θa = 35oFrom the figure below,OF = a = 2.0 mOE = b = 2.0 mAsked:1) real height…

Q: An incompressible fluid flows through a pipe that has two sections: a wide section with a diameter…

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Q: The propeller of a World War II fighter plane is 2.3 m in diameter. (a) What is its angular velocity…

A: Given data:  Angular velocity (ω) = 1100 rev/min Diameter (d) = 2.3 m Required: The linear speed of…

Q: Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun…

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Q: One hot day in Boracay, the temperature is 31°C. You buy a bottled water, which is taken from a…

A: Solution:- 1) According to the Newton's law of cooling, the temperature of a body at time t , is…

Q: What is the orientation of the resultant vector? (Vectors are not to scale.) 17° 99.5 N 44 N 70.47…

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Q: can I get part d and e of this if possible.

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Q: If an electron falls from the n = 2 to the n = 1 energy levels in a Hydrogen atom what wavelength of…

A: Solution:- 1) In hydrogen like atom when an makes a transition between state ni to state nf, the…

Q: Compare angular acceleration with linear acceleration, in terms of the relationship between…

A: Angular acceleration is defined as the rate of change of angular velocity with time. If angular…

Q: A sled is pulled up to the top of a hill. The sketch above indicates the shape of the hill. At the…

A: In this question, we are talking about the kinetic energy values possessed by two sleds, both…

Q: For the following displacement vectors in meters: A = +4.0 -5.0k, B=-3.0 j+2.0k, and C=-3.0-2.0…

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Q: A helicopter blade spins at exactly 115 revolutions per minute. Its tip is 6.50 m from the center of…

A: a) Calculate the time taken to complete one revolution. t115 rev=1 mint1 rev=1115 min×60 s1 mint1…

Relativistic Energy and Momentum

According to classical physics, time flow is the same for every observer. But according to einstein's theory, time flow is different for different observers. The idea that time flow is not the same for all may sound strange because we may not experience this effect in everyday life. This effect is only observed when an object moves with some velocity comparable to the velocity of light. This velocity is termed relativistic velocity.