A laser beam has a power of 90 W.It has an aperture of 3x0-m ond emits a light of wavelength 60 The beam Is focused with a lens of focal length 0.2 m Colculate the intensity of thhe imoge

Q: 4. If an elevator with a mass of 200kg rises 50m up a building with a total passenger mass of 125kg,…

A:

Q: If there is no friction, calculate the time it takes for the object to reach its highest point.…

A:

Q: 7 5 6 3 ·x

A:

Q: The unit of work is a combination of the units of   A force and displacement   B force and…

A:

Q: A flower vase on a table slides off horizontally with a speed of 1.50 m/s. It statter in pieces on…

A: Given data: Initial velocity (u) = 1.50 m/s, horizontally Time (t) = 0.450 s Required: The height of…

Q: If the speed at x = 1, v(r = 1) = 3 m/s then the speed at x = 0, v(x=0) is:

A:

Q: B.E. of a satellite is 4×10³ J. Calculato its kinetic I energy potential energy.

A: To find-(1) K.E. =?(2) P.E.=?Given that-B.E.=4×108 J

Q: O X Z y Ox y N F LL B

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Q: If a plane has a mass of 1.4x10^6 kg, and if its speed is 1.8x10^2 m/s, what is its kinetic energy?

A: Given data:  Mass (m) = 1.4×106 kg Speed (v) = 1.8×102 m/s Required: Kinetic energy (KE)

Q: 38. When a 5-kilogram mass is lifted from the ground to a height of 10 meters, the gravitational…

A: when the object from its initial position is lifted by height h on earth then the gravitational…

Q: The potential energy of earth at aphelion

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Q: If all the items in the figure have the same mass,which two items will have the same gravitational…

A: Let mass of each object A, B, C, and D = m  The acceleration due to gravity = g ( for each object).…

Q: 3 What is the velocity of a 2 kg object dropped from a height of 20 m when it hits the ground, in…

A: Given that-Mass, m= 2 kgHeight, h= 20 mBy using conservation of energyWe can write-Kinetic energy=…

Q: Which one of the following is NOT the unit of power? Watts Íb/s Nm/s O J/s

A: Power is rate of change of energy.

Q: Which of the following quantities represent mass? 12.0 lb 0.34 g 120 kg 1600 kilanewtons (kN)…

A: Given 12.0 lb 0.34 g 120 kg 1600 kilanewtons (kN) 0.34 m 411 cm

Q: a jet is in a circular motion with the speed 200km/h with radious= 5km if a body of 1kg falles into…

A: Concept used: An object in circular motion experiences centripetal force.

Q: A force of 49 N raises a 5 kg object 0.82 m upwards. How much work was done by the force?

A:

Q: I z( max)

A: Solution: When maximum current is flowing through the Zener diode, the current through the load will…

Q: R3 R1 R2 R4 Consider the network of four resistors shown in the diagram, where R1 = 2.00? , R2 =…

A: Given information: Here, R is the resistance.

Q: O Kilogram O Newton O Second Watt Meter Work None of the choices Joule

A: The SI unit of power is Watt. The unit of any type of power, irrespective of its origin such as…

Q: rem states that the change in the kinetic energy of an object is equal to what What is called to an…

A: We know the work-energy theorem, According to this theorem. The work done [W] on an object is equal…

Q: What is the potential energy of a body in space?

A: Potential energy is,

Q: What is the gravitational potential energy of the earth as it orbits the sun?

A: Here we have to find out gravitational potential energy of the earth as it orbits the sun.

Q: 3. Which requires a greater power rating? Raising a 4 kg flag atop a 25 meter flagpole in 90 seconds…

A: power (P) is the amount of work done per unit time Work = Force × Distance W = F×d Then,  P =W/t =…

Q: Which of the following is the SI unit for gravitational kinetic energy? (Joule is not the answer)

A:

Q: What is work done by Earth's gravitational force in keeping the moon in the orbit?

A: The work done by the earth's gravitational force in keeping the moon in the orbit is zero.

Q: How much work (in J) must be done to lift a stack of bricks, which has a mass of 700 kg, from the…

A: mass m = 700 kg height h = 13 m g = 10 m/s2

Q: If an object of mass 46 kg has a kinetic energy of 225 j, what is its velocity?

A:

Q: A force of 49 N raises a 5 kg object 0.61 m upwards. How much work was done by the force?

A: Applied force (F) = 49 N Mass (m) = 5 kg Distance moved (d) = 0.61 m (upwards)

Q: Convert the following: 365 miph to m/s 98 rev/min to rad/s 4585 kJ/kg to BTU/lb

A: According to question we need to convert unit of given quantity.

Q: 5) The Zarya Module (mass = 1.93x10 4kg) was launched in 1998 at the Baikonur Cosmodrome in…

A:

Q: 11. You start from your house at 10:00am, goes to your friend's house and then to the grocery shop.…

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Q: The cost of fuel in running a locomotive is proportional to the square of the speed and is $25 per…

A: The answer to the above problem is given below

Q: 16. One of the physical quantities shown below is a scalar that is always positive. Which one is…

A: Correct option  1. Kinetic Energy

Q: 3. Refer back to Figure 8.1. For which types of electromagnetic radiation is the atmosphere of the…

A: Required : For which type of electromagnetic radiation, is the atmosphere of the Earth completely…

Q: In which situation will the object have the largest gravitational potential energy? a squid deep in…

A: The potential energy is the work done by the external force. The gravitational force is a central…

Q: How high would a 4.8 kg squirrel has to climb a tree to have a gravitational potential energy of 52…

A: GivenGravitational potential energy = 52 JMass of squirrel (m) = 4.8 kg