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? HINT: The answer is NOT 4.29x108 m/s.

Q: In a vacuum, a proton (charge = +e, mass = 1.67 x 10-27 kg) is moving parallel to a uniform electric…

A: Mass of proton = 1.67×10-27kg Intial velocity of proton = 9.9×104 m/S Value of electric field =…

Q: A water pump draws water from a pit that is 11.5 m deep at a rate of 685 kg/min. The water ejects…

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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: 13. A machine does 192 J of work in 24 Sec. What is the power of the machine?

A: Given data,   Work  =  W    Time  =  t      Required ,           Power

Q: Two forces of 571 newtons and 496 newtons act on a point. The resultant force is 1044 newtons. Find…

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Q: From the description of Seema’s journey below, construct a distance-  time graph. Seema left home at…

A: Motion can be uniform or accelerated. Motion is relative as it differs in different scenario.…

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: Q8. Assume the electric potential at the negatively charged plate is zero. Clearly show all work! a)…

A: We have a positively charged plate which has potential V1=120 V and a negatively charged plate which…

Q: a. the time it reached the maximum height? 2.597sec b. max. ht. the ball had reached? 108.53ft c.…

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Q: Determine the forces in members BC, BE, and BF. The triangles are isosceles. The forces are positive…

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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: 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: Particle A and particle B are held together with a compressed spring between them. When they are…

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Q: 2. What is the man's average velocity, when he walks a distance of 700 meters in 10 minutes? (Ans:…

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Q: n the ballistic pendulum shown below, the block has a mass of 2.4 kg, the bullet has a mass of…

A:

Q: F 30° Book on a - 1 kg book is s applied as flat table. A force shown. The coefficient of tatic…

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Q: A motorcyclist starts from rest and reaches a speed of 6 m/s after travelling with uniform…

A: Given data:  Initial velocity (u) = 0 m/s Final velocity (v) = 6 m/s Time (t) = 3 s Required:…

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

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Q: A crate of mass 65 kg is pushed along a floor with a force of 40 N for a distance of 12.11 m.…

A: Given data,    Force  =  F    Distance  =  d      To find,          Work done

Q: A monkey is hanging on a tree branch that is inclined upwards 30 degrees from the horizontal to grab…

A:

Q: (II) A hair dryer draws 7.5 A when plugged into a 120-V line. (a) What is its resistance? (b) How…

A: Given dataThe current is I=7.5AVoltage is V=120v

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: A projectile fired from the ground level at the angle of 40.0 degrees above horizontal at the speed…

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Q: Dolphins can use sonar to detect objects in the sea. How far away is the object from the dolphin if…

A: Given data:  Total time (t) = 0.02 s Speed of sound (v) = 1484 m/s Required: The distance between…

Q: Apply the work equation to determine the amount of work done, in N-m, by a 121 N force applied at an…

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Q: 2. A glass rod is rubbed with a piece of silk. During the process the glass rod acquires a positive…

A: Transfer of electrons takes place when two objects are rubbed with each other. Due to this both the…

Q: Two forces F1 and F2 act on a 6.80 kg object. Taking F 1= 32.0N and F 2 =21.0N, find the…

A: Given Forces are given as F1=32.0 N and F2=21.0 N Mass of the object is m=6.80 kg   We have to find…

Q: The relative Index of Refraction of Medium 1 and 2 and the direction of bending at the boundary are…

A: Concept of refraction: When the light ray passing across the interface from higher refractive index…

Q: 6. If the current I₁ = 3 A, use the potential difference Vab to determine the value of the current…

A: Kirchhoff's voltage states that the algebraic sum of all IR drops and EMFs in any closed loop(or…

Q: Problem 7:  Consider two points in an electric field. The potential at point 1, V1, is 26 V. The…

A: (a) The change in electric potential energy is given by ∆U =q(∆V) Here,∆V =V2-V1 and charge of…

Q: A cylinder 30.0 cm in diameter is at rest initially. It is then given an angular acceleration of…

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Q: Two atoms of the same substance, one singly ionized and the other triply ionized, are each…

A: Let the charge of singly ionised atom, q1=e Then the charge of triply ionised atom, q2=3e a) The…

Q: If a reactor produces an average power of 1000 MW for a year, a. How much U-235 is used up assuming…

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Q: An 80 kg man is jogging at a velocity of 4 m/s. What is his kinetic energy?

A: Given data,       Velocity  =  v       Mass   =  m        To find,           Kinetic energy

Q: An uncharged capacitor and a resistor are connected in series to a source of emf. If E = 11.0 V, C =…

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Q: The total momentum for any system of objects is constant so long as the following is true. (Select…

A: Momentum is conserved, when there no external force is actin on it  First option is correct

Q: A uniform electric field of magnitude 7.9 N/C passes through a circle of radius 16 cm . Part A)…

A: Given data: Electric field, E=7.9 N/C Radius of circle, r=16 cm=16×10-2 m

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

A:

Q: 1. (I) The magnetic flux through a coil of wire containing two loops changes at a constant rate from…

A: Given:flux changes from -58 Wb to +38 WbTime change, △t=0.34 sno. of turns,n=2To find:emf induced,…

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 20 kg box of textbooks rests on a ramp that makes an angle with the horizontal. The coefficient of…

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Q: Two wires are identical, except that one is aluminum and one is copper. The aluminum wire has a…

A: Resistance for a wire can be found from R=ρLA where ρ is the resistivity of material, L is length…

Q: 5. How high can a cannon ball fly if it is fired at 100ft/sec at an angle of 45°? (Ans: 78.135 ft.

A: Given data :      Initial velocity (u) = 100 ft/s      Angle of projectile (θ) = 45°

Q: 1. Work: How much work is done by the gravitational force when a 229 kg pile driver falls 2.79 m…

A: As per guidelines only first question is solved here .

Q: Q1. A small block of mass 1 kg drops from rest at the top of a curved track at a height h = 10 m and…

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Q: Are angle of incidence and angle of reflection still equal in concave and convex mirrors?

A: To find: Are angle of incidence and angle of reflection still equal in concave and convex mirrors?

Q: Two resistors have resistances R(smaller) and R(larger), where R(smaller) < R(larger). When the…

A: According to Ohm's law voltage is directly proportional to current. So, V=iRWhen two resistances are…

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: 3. (I) What is the current in amperes if 1200 Na* ions flow across a cell membrane in 3.5 us? The…

A: Given:Number of Na ion, n=1200Time taken, t=3.5 μs=3.5×10-6sTo find:Current,I=?

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

A: