Compare the light-gathering power of a 10 m Keck telescope with that of a 0.8 m telescope.

Q: A particle of charge -0.8 µC is located at the end of a spring at some equilibrium position (left…

A:

Q: An object has a mass of 450 g and a volume of 2140 cm³. Find its density ?

A: Introduction :  In this question we are provided it value of  mass and volume . With these data we…

Q: Why is the thermal energy of the water in a bathtub higher than in a freshly brewed coffee pot…

A:

Q: QUESTION 1 The standard unit of momentum and impulse is the N.s O True O False QUESTION 3 Impulse is…

A: Question 1 The stander unit of momentun and impulse is the N.s. its  true . We know impulse  N.s=…

Q: How does the frequency of the sound given by a stretched string depends on its, (a). Tension (b).…

A: Frequency of the sound is given by  f=12LTμWhere T is tension in the string, L is the length of the…

Q: The distance of point A from a source of wave is 1/5 that of point B. Find the ratio of the…

A: Let distance from point A to source is x and that of point B is 5x.

Q: A projectile is lauched from the ground level with an velocity of v ^0 feet per second. Neglecting…

A:

Q: An object dropped from a cliff falls with a constant acceleration of 13 m/8². Find its speed 5.58…

A: Introduction :  In this question we are provided it value of  initial velocity , acceleration and…

Q: oped from a height H from the floor with the zero initial velocity. The ball is falling under the…

A:

Q: a refrigerator removes heat from the cubicle at the rate of 20kj and ejects 24kj into a room per…

A: Given in question:   Heat removed from the cubicle per cycle(QR) = 20 KJ…

Q: QUESTION 1 The standard unit of momentum and impulse is the N.s O True O False

A:

Q: A(n) 65-g ice cube at 0°C is placed in 680 g of water at 28°C. What is the final temperature of the…

A:

Q: X-rays have a wavelength of 0.71 A)) scattered by a piece of carbon at a right angle, then analyzed…

A: We have an incoming X-ray of wavelength λ=0.71 Ao=0.71×10-10m which is scattered at right angle…

Q: If the frequency of a vibrating particle is 400 Hz (and the speed of sound in air is 320 m/s), then…

A:

Q: Determine the value of the slope for the given two points (0.500, 7.41) and (0.800, 3.42) -13.3…

A: If two point ( x1,y1) and (x2,y2) are given then slope can be written as m = tanθ =y2-y1x2-x1

Q: the following equation refers to V-pendulum experiment T4 = (4²¹ L k/ g² )-(8 m4L/g² )d, where : L:…

A: Given equation: T4 = 4 π4Lkg2-8 π4Lg2d This is of the form y = mx + c It is given that the slope of…

Q: An object is placed 20 cm in front of a convex mirror as shown below. What focal length should the…

A: Given  position of object (u)=-20 cm magnification(m) = +0.33 Required focal length (f)=?

Q: You managed to pull a heavy crate up a ramp on a truck. The crate has mass 46 kg. You were pulling…

A:

Q: Three objects of mass 2.5 kg each are placed at the vertices of a right-angled triangle whose sides…

A:

Q: Determine the range of values for Mass B so that 250 kg Mass A in Figure Q2 is in equilibrium. The…

A:

Q: The slider block moves with a velocity of VB = 5 ft/s and an acceleration of aB = 3 ft/s².(Figure 1)…

A:

Q: The position of a particle in millimeters is given by s = 70 - 17t + t2 where t is in seconds. Plot…

A:

Q: Part A: 1180 Btu/hr heat is conducted through a section of insulating material shown in Figure that…

A:

Q: Problem 6: A bowling ball m = 2.2 kg is dropped from a height h. It falls a distance, d, before…

A: in this question we use conservation of energy of system.

Q: The aorta carries blood away from the heart and eventually branches into a large number of…

A: The approximate number of capillaries in the human body is 5.19 × 1010 capillaries.

Q: A car starts from rest and reaches a speed of 12 m/s after travelling with uniform acceleration for…

A: Introduction :  In this question we are provided it value of final velocity , initial velocity and…

Q: 4) The Richter scale is used for measuring the magnitude of an earthquake. The Richter magnitude R…

A: Given  Magnitude of earthquake given by Richer's scale :-  R = 0.67 log(0.37E)  + 1.46     Here ,…

Q: A 4.10-kg block is at rest on a horizontal floor. If you push horizontally on the 4.10-kg block with…

A:

Q: What type of sound wave?

A:

Q: A printed circuit board dissipates 100 W from one side over area 0.3 m by 0.2 m. A fan is used to…

A: Solution:-

Q: An electric heater is rated 2.5 kW. how much energy does it use in 12 hours.

A: Given that, Power of electric heater (P)= 2.5 kW Or,   P= 2.5× 10³ W Total time(t)= 12 hours t= 12×…

Q: Calculate the magnitude of the force exerted on the charge by the field B = -3ax + 4ay+ 6a₂ T if the…

A: In the given question, Charge of particle = Q = 18nC = 18×10-9C Magnetic field = B→ = -3ax + 4ay…

Q: While sunbathing on the balcony of your 3rd floor apartment, you notice a gorilla drop a m = 38.2 kg…

A: Angular Momentum is given by:- L= mvr⊥ Where; m= mass of the crate= 38.2 kg r⊥= perpendicular…

Q: An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the…

A:

Q: Given data Time = 6 h Distance = 220 km Find the average speed ?

A:

Q: D Part (c) Write an equation for the work done in stretching the spring from x1 to x₂. Part (d)…

A: The spring is stretched from x=0 to x1=35 cm=0.35 m with a spring constant k1=660 N/m, then from x1…

Q: QUESTION 4 According to the below equation and if the massof the moving object is 100 g that movies…

A: In this question we have to find the value of linear velocity. Please give positive feedback if the…

Q: Find pressure Force=2 N Area=0.2 mm2

A: Given data : Force=F Area=A   Required : Pressure

Q: In Figure (1), a 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table.…

A:

Q: dis Problem 2: Two points are located in the Cartesian plane. The first has coordinates (1.83…

A:

Q: The weight of a body is 160 N. What is it's mass? Given g = 10 m/s²

A: Introduction :   In this question we are provided it value of  weight of the body and gravitational…

Q: The intensity of the refracted ray when light travels from an optically denser medium to a less…

A:

Q: Given data: Mass=3.345 kg Acceleration=0.8 m/s2 Find Force

A: Given data : Mass=m Acceleration=a   To find : Force

Q: When a boy weighing 20 kgf sits at one end of a 4m long see-saw, it gets depressed at its end. How…

A:

Q: Question 10 of 22 Radium (A = 226, Z=88) decays to Radon (A = 222, Z=86) with a half-life of 1600…

A: in this  question  we discuss  about decay of radioactive substances.

Q: An all-electric car (not a hybrid) is designed to run from a bank of 12.0 V batteries with total…

A: given V=12 VP=8.2 kWsince,P=VII is the currentI=PVI=8200 watts12 VI=683 A

Q: Two point charges are located on the y-axis. One is at y = 1.00 m, the other is at y = -1.00 m, and…

A:

Q: The first artificial satellite to orbit the Earth was Sputnik I, launched October 4, 1957. The mass…

A:

Q: Find the momentum Mass-11 kg Velocity=1 m/s

A:

Q: C. Consider that the Potential energy at point C is 13 J and it is equal to the Kinetic Energy at…

A: We know that the pendulum is consist of the bob and string [ massless ]  the one end of the string…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.