A severely injured Peter can only live for the next 3.5 hours. Before dying, he wants to go back to Earth which is 5 light-hours away. What should be the minimum cruise speed of the Peter's spaceship so that at least he can make it before he runs out of time?

Q: What is the wavelength of a 448 Hz sound wave if it is traveling in air at a temperature of 23.0…

A: A sound wave is caused by the energy traveling away from the source of the sound. Sound waves are…

Q: Ee = 130 N/C is the known electric field just above the Earth's surface. (a) Determine the total…

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Q: Two light sources can be adjusted to emit monochromatic light of any visible wavelength. The two…

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Q: If we were dealing with an atom that had a total of 20 electrons in its electron cloud, how many of…

A: Atom can be treated as our solar system where nucleus resides in the center as our sun. The…

Q: An electron with speed 2.15×107 m/sm/s is traveling parallel to a uniform electric field of…

A: Ignoring relativistic effects we can solve the above question in the following method:-

Q: A "snapshot" of a wave is given on the graph. What is the speed of the wave if the frequency of…

A: Given data: Frequency (f) = 4 Hz From graph  Wavelength (λ) = 1.5 m Required: The wave speed (v)

Q: What beat frequency would be heard by a tuba player in a marching band, of a note with a frequency…

A: For calculation of speed of sound in 32.4C = 305.4 K c =331.3 1+T273.15=331.31+305.55273.15= 482.226…

Q: Which one of the following circuits has the largest resistance? (a) (b) 10 A 2 V (d) www 75 A 15 V…

A: Given data:  Five different circuits are given Required: The largest resistance

Q: 1. Find the final velocity of the car after it started from rest in 20 seconds at an acceleration of…

A: Given data: Initial velocity, u=0 m/s (since the car start's from rest) Time taken, t=20 s…

Q: A 2 kg hoop with a radius of 5 cm rolls without slipping. If the linear speed of the hoop is 2 m/s.…

A: Required : Translational kinetic energy

Q: 3. From the experiment in Part 1, we see that a) the balloon acquired more protons and became…

A: 3) By rubbing the sweater with balloon, the elections from outer orbit of the atoms of sweater are…

Q: 5. (II) An 18.5-cm-diameter loop of wire is initially oriented perpendicular to a 1.5-T magnetic…

A: Given: The diameter of the loop is 18.5 cm. The magnetic field is 1.5 T. The initial orientation of…

Q: A plastic board with length X and mass Y is leaning against a frictionless wall. The plastic b. made…

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Q: 40. A train travels at a speed of 144 km/h. Its wheels per- fectly adhere to the rails (no sliding)…

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Q: A basketball player jumps straight up for a ball. To do this, he lowers his body 0.290 m and then…

A: in this question we use equation  of motion.

Q: If you push a block against the wall with the force, F = 31N, ( Force is perpendicular to the wall)…

A: The force is applied perpendicular to the wall. So there are no vertical force component.

Q: A roller coaster car of mass, m, enters the bottom of a frictionless vertical loop of radius 12.0m…

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Q: A current of 0.2 Ampere flows through a conductor of resistance 4.5 2. Calculate the potential…

A: Given data The current in the circuit is given as I = 0.2 A. The resistance that flows through the…

Q: 2) A rod with negligible resistance is rotating with angular velocity of w = 5.0 rad/s over a…

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Q: In the ballistic pendulum shown below, the block has a mass of 1.7 kg, the bullet has a mass of…

A: Given:-  The mass of the block is m = 1.7 kg.  The mass of the bullet is m = 0.0054 kg. The length…

Q: A deli owner creates a lunch special display board by taking a uniform board which has a weight of…

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Q: GURE 4 shows the magnetic field is constant and is directed into e plane of the drawing. If the bar…

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Q: A big boulder has a mass of 8.20t (metric tons) and rests at a coal mine site. The boulder is blown…

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Q: #17      What is the magnetic field at the center of the loop in Figure below?

A: Given data The current is given as I = 5 A. The diameter of the center of the loop is given as d =…

Q: In the figure below, E1=7 V, E2 = 12 V, R1 = 22 Ohm, R2 = 47 Ohm, R3= 15 Ohm. Find Vfd- R2 R3

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Q: Mike and Carl are fighting over a 1 kg stick.  Mike pulls to the right with a force of 30 N and Carl…

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Q: At noon, ship A is 110 km west of ship B. Ship A is sailing east at 25 km/h and ship B is sailing…

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Q: A beam of light strikes a sheet of glass at an angle of 57.0° with the normal in air. You observe…

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Q: 60kg motor sits on four cylindrical rubber blocks. Each cylinder has a height of 3.0 cm and a…

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Q: The atmospheric pressure on an object decreases as altitude increases. If a is the height (in km)…

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Q: Calculate the effective value of g, the acceleration of gravity, at 6000 km, above the Earth's…

A: Note: As per the guidelines, we can only answer first question of multiple question. Sorry for the…

Q: An aluminum nail has an excess charge of +6.4 How many electrons must be added to the nail to make…

A:

Q: Problem 3:  Consider a parallel plate capacitor having plates of area 1.65 cm2 that are separated by…

A: Given:-  The area of the parallel plate capacitance is A = 1.65 cm2 The Separation distance is d =…

Q: A 2.00-nF capacitor with an initial charge of 4.98 μC is discharged through a 2.15-k resistor. (a)…

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Q: A plastic film with index of refraction 1.70 is applied to the surface of a car window to increase…

A:

Q: Two narrow, parallel slits separated by 0.850 mm are illuminated by 570-nm light, and the viewing…

A:

Q: A gardener is using a tool as shown in the figure to pull weeds. 60cm 24 cm

A: Given, Gardner applies a torque in order to pull a weed, τ = 1.77 N

Q: The space station, with a mass of about 854,000 kg, has lost its geostationary orbit (an altitude of…

A: Given:- m= mass of the space station= 854000 kg = 8.54×105 Kg Ro= Radius of Geostationary Orbit=…

Q: 4. How far can a cannon ball reach if it is fired at 100ft 45°? (Ans: 312.53 ft.)

A: Required Range of the projectile.

Q: Find the Torque at Pt. 0. 1 unit: 1 meter (Ans: Lo=34.31 N-m) A 100 N 0 D=100 N B= 200 N C = 100 N

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Q: Three 100 resistors are connected as shown in the figure. The maximum power that can safely be…

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Q: Given two resistors A and B. Their current - voltage relationship is as shown in below figure.…

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Q: Are you convinced that motors and generators are really the same? Explain how they are the same yet…

A: The design/construction of motor and generator are quite similar. Both have coils(windings)…

Q: . 3. Where on the diagram below of a frictionless roller coaster a) is the potential energy the…

A: 1. a) We know that potential energy is energy stored in a body by the virtue of it's position given…

Q: The left end of a long glass rod 6.00 cm in diameter has a convex hemispherical surface 3.00 cm in…

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Q: A cylinder rotating at 4.3 rad/s is accelerated to 37.1 rad/s in 6.5 s. What is the angular…

A: Angular acceleration is the term for the time rate of change of angular velocity. The most prevalent…

Q: Given the picture of a wave below, the fact that it travels at 25 m/s and that it is moving in…

A: d) Because the molecules of a solid are closer together and can transmit vibrations (energy) more…

Q: A student connects two resistors with unknown resistance values in series, and notes that the…

A: Let the two resistors be = R1 and R2The equivalent resistance when connected in series = 725 ohm The…

Q: Young's double-slit experiment is performed with 550-nm light and a distance of 2.00 m between the…

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Q: Three 100 resistors are connected as shown in the figure. The maximum power that can safely be…

A: