A spy satellite can consist essentially of a large-diameter concave mirror forming an image on a digital-camera detector and sending the picture to a ground receiver by radio waves. In effect, it is an astronomical telescope in orbit, looking down instead of up. Can a spy satellite read a license plate? Can it read the date on a dime? Argue for your answers by making an order-of-magnitude calculation, specifying the data you estimate.

Q: 145.0° 60.0 N -- +x 40.0 N

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Q: Given the two displacements D= (6.00î + 3.00ĵ - 1.00k)m E= (4.00î – 5.00ĵ + 8.00k)m Find the magnitu...

A: Given: The displacement vector D→ is 6.00i⏜+3.00j⏜-1.00k⏜ m. The displacement vector E→ is 4.00i⏜-5....

Q: Physics Question

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Q: A locomotive pulls 10 identical freight cars of mass ?=1.0×105 kgm=1.0×105 kg with an acceleration o...

A: Let the force between ith and jth freight car be Fij.

Q: The question is in the picture.

A: Given information: An insulating sphere is uniformly charged with a charge Q The radius of the spher...

Q: A shopper pushes her 25 kg grocery cart by a force of 225 N inclined at an angle of 60° with the hor...

A: W=Fdcosθ=225 N7.5 mcos60°=844 J

Q: A spaceship maneuvering near Planet Zeta is located at r⃗=(600i^−400j^+200k^)×103kmr→=(600i^−400j^+2...

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Q: What is the angle (in degrees) between the vectors A and B?

A: We know, A×B=ABsinθ   Thus, the angle will be, θ=sin-1A×BAB

Q: Show that the radius r of the orbit of a moon of a given planet can be determined from the radius R ...

A: Given values,  Radius of Jupiter = R = 71492 km Time required to complete one full rotation = 3.551 ...

Q: How would our knowledge about galaxies be altered if we didn't have telescopes? Justify your answer.

A: If we did not have telescopes, it would be impossible to see other galaxies by naked eye, hence we m...

Q: A space traveller weighs herself on Earth at a location where the acceleration due to gravity is 9.8...

A: mass of the traveler is  W=mgm=Wg=553 N9.82 m/s2=56.314 kg    

Q: Physics Question

A: Given that the two forces in the same plane. The resultant force is defined as. F→net=F→1+F→2=2.0i^+...

Q: The 350-kg flywheel of a small hoisting engine has a radius of gyration of 600 mm. If the power is c...

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Q: In kinematics it may be necessary to analyze a situation in which particles do not exhibit regular d...

A: The slope of a displacement(or distance)-time graph gives velocity(or speed). The slope of a velocit...

Q: Two vectors have the following magnitude, A = 7.2 m and B = 7.8 m. Their vector product is:  A⨯B = -...

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Q: A copper wire 100m long with cross-sectional area of 2x10-4 cm2 is heated from room temperature of 2...

A: 1. The expression for find initial resistance of wire is R=ρlA Substitute values in the above equati...

Q: A dart of a mass of 20 g hits a target while traveling horizontally with a velocity of 5 m/s. The da...

A: The mass of the dart ,m=20 g=20×10-3 kg The initial velocity of the dart u=5 m/s The distance travel...

Q: Pedro is driving a motorcycle along Espana boulevard. His position x (in meters) at any given time t...

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Q: How large an expansion gap should be left between steel railroad rails if they may reach a maximum t...

A: The change in length is given by, ∆L=αL∆T   the linear expansion co-efficient for steel is 12×10-6 C...

Q: An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of ...

A: Given values: Magnetic field,B=3.50 mT Angular momentum, L=3.00×10-25 Js Mass of electron, m=9.1×10-...

Q: Help fast

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Q: Which is more difficult to stop a sailboat or a cruise ship?why?

A: A cruise and a sailboat, both stay afloat on water due to the buoyant force acting on them.  

Q: Choose which one either A, B, C, D, E, or F

A: Equipotential surfaces are the surfaces with same electrostatic potentials. Similarly equipotential ...

Q: You are on the roof of a Physics Building, 54 m above the ground. Your physics professor, who is 1.7...

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Q: Using the information below, compute the actual energy consumed by the microwave, in kJ, for this re...

A: Given: The power of microwave is 801 J/s. The time of operation is 5 min. The power used by hot plat...

Q: A fox is chasing a bunny. The bunny is initially hopping east at 7 m/s when it first sees the fox. O...

A: Given data: The initial velocity of the bunny in east direction is u=7m/s. The final velocity of th...

Q: A small 10kg car pushes a large 100kg truck with a 500 Newton Force.  What is the force (in Newton) ...

A: According to Newton's third law, for every action there will be an equal and opposite reaction occur...

Q: An object moving with a negative velocity and a positive  acceleration would be what? speeding up in...

A: Given: An object moving with a negative velocity and a positive acceleration. We need to find the na...

Q: (a) Find the useful power output (in W) of an elevator motor that lifts a 2700 kg load a height of 3...

A: In the question, mass of elevator= 2700 kg mass of counter-weight is:=total mass - mass of elevator=...

Q: 1) A sound wave of wavelength 20 cm is split into two equal parts that later recombine at the ear of...

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and s...

Q: Two particles approach each other head-on with the same speed and collide elastically. After the col...

A: Given: The mass of one of the sphere is 500 g. The speed of both the spheres are equal before collis...

Q: Indicate the region of the spectrum for each of the following wavelengths of light.   320 pm 560 nm

A: The electromagnetic spectrum is basically divided into seven regions namely:   Gamma spectrum-X-rays...

Q: 4.4 • A man is dragging a trunk up the loading ramp of a mover's truck. The 75.0° - ramp has a slope...

A: Solution: As given in the problem, we can see the angles; Lets draw the Freebody diagram a) lets r...

Q: What is the range of the shuttlecock launched with an initial speed of 5.3323 m/s at 41.7902-degree ...

A: Given data: Initial speed of shuttle, u=5.3323 m/s Angle with horizontal, θ=41.7902o Height from the...

Q: Composite or stratovolcanoes often eject tiny particles of dust into the atmosphere causing dust clo...

A: The Coulomb force (F) is given by, Here, 1/4πεo = 9 x 109 Nm2C-2, q1 and q2 are the charges separat...

Q: If vox=12.73, voy=12.73, tup=1.30, ttotal=2.60, range=33.09, height =8.27 Find the  percentage  erro...

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Q: Problem For a projectile lunched with an initial velocity of vo at an angle of e (between 0 and 90°)...

A: Initial velocity components along x and y directions expressed as follows: vinitial x=v0cosθvinitial...

Q: The leg and cast in the figure below weigh 250 N, with the center of mass as indicated by the blue a...

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Q: A copper wire 100m long with cross-sectional area of 2x10-4 cm2 is heated from room temperature of 2...

A: Given:Lenght,L=100mArea,A=2×10-8 m2Temperature,T1=25°CTemperature,T2=200°CNow,For copper, at 25°Cρ=1...

Q: 13–38. The 300-kg bar B, originally at rest, is being towed over a series of small rollers. Determin...

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Q: A baseball player friend of yours wants to determine his pitching speed. You have him stand on a led...

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Q: If Earth expanded to twice its diameter without changing it's mass, find the resulting magnitude of ...

A: Given data: The changed diameter of the earth is D1=2D.   The expression for the gravitational fie...

Q: 23. An airplane banks at an angle of 11° while flying in a level circle at 316 mi/h. What is its pat...

A: Given data The banking of the airplane while flying is θ=11°. The velocity of the airplane is v = 31...

Q: Round off all answers to two decimal places

A: Expressing A and B in vector form, A→=5.3cos12° i^+5.3sin12° j^A→=5.18 i^+1.10j^B→=2cos45°- i^+2sin4...