12,727 Answered Questions for the topic physics

Physics

07/17/23

physics forces unit
An intergalactic space traveler has discovered a planet that has a mass of 6.0 x 10^23 kg. The force of gravity acting on a 2 kg mass on the surface of the planet is 960 N. What is the radius of... more
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Physics

07/17/23

forces physics unit
Kara (55 kg) is standing next to her brother Ben (80 kg) on a large piece of frictionless ice. Being a bit of a joker, Kara decides to push her brother with a force of 200 N expecting him to slide... more
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Physics

07/17/23

forces physics unit
On Monday, NASA launched a 550 kg satellite into space. Its engines have a thrust of 8000 N. (7 marks)a) What is the downward force of gravity acting on the rocket at blast-off?b) What is the... more
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Physics

07/16/23

Voltage - Physics 152 (or Phys 2) question
In a series circuit, a generator (1400 Hz, 14.0V) is connected to a 12.0-Ω resistor, a 3.90-µF capacitor, and a 5.90-mH inductor. Find the voltages across (a) the resistor, (b) the capacitor, and... more
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Physics

07/16/23

Frequency problem - Physics 152 (or Phys 2) question
A 101-Ω resistor,a 0.234-µF capacitor, and a 5.69-mH inductor are connected in series to a generator whose voltage is 22.4 V. The current in the circuit is 0.128 A. Because of the shape of the... more
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Physics

07/16/23

Resistance - Physics 152 (or Phys 2) question
A generator is connected to a resistor and a 0.038-H inductor in series. The rms voltage across the generator is 7.4 V. When the generator frequency is set to 120 Hz, the rms voltage across the... more
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Physics

07/16/23

Average power - Physics 152 (or Phys 2) question
The resistor in a series RCL circuit has a resistance of 94.0 Ω, while the rms voltage of the generator is 6.00 V. At resonance, what is the average power delivered to the circuit?
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Physics

07/16/23

Solenoid construction - Physics 152 (or Phys 2) question
Suppose you wish to make a solenoid whose self-inductance is 1.8 mH. The inductor is to have a cross-sectional area of 1.3 x 10^-3 m^2 and a length of 0.053 m. How many turns of wire are needed?
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Physics

07/16/23

Magnetic Flux Phys 152 (or Phys 2) question
The magnetic flux that passes through one turn of a 15-turn coil of wire changes to 3.51 from 9.63 Wb in a time of 0.0559 s. The average induced current in the coil is 287 A. What is the resistance... more
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Physics

07/15/23

newton's law of motion
A little league player hits a baseball from a tee. The baseball experiences a net force of 8000 N [S]. The mass of the ball is 145 g. What is the acceleration of the ball?
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Physics

07/15/23

newton's law of motion
An ice skater pushes off a railing. Which of the following is the reaction force?a) the force of gravityb) the force of the skater pushing off the railingc) the force of the railing pushing back on... more
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Physics

07/15/23

newton's law of motion
A person is sliding a 12.0 kg block across ice that has a coefficient of kinetic friction of 0.100. How much force does the person need to apply to keep the block moving at a constant rate?
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Physics

07/14/23

newton's law of motion
A fully loaded Saturn V rocket has a mass of 2.92 x 106 kg. Its engines have a thrust of 3.34 x 107 N. a. What is the downward force of gravity on the rocket at blast-off? b. What is the unbalanced... more
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Physics

07/14/23

newton's law of motion
Harry is pushing a car down a level road at 2.0 m/s with a force of 243 N. The total force acting on the car in the opposite direction, including road friction and air resistance, is which of the... more
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Physics

07/14/23

netwon's laws of motion
A force of 250 N is used to push a heavy box down the street. If the force of friction between the box and the street is 195 N and the box has a mass of 60 kg, what is the acceleration of the box?... more
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Physics

07/14/23

free body diagram
pls answer as soon as possible thanksWhat is the net force on an object in the following situation? F1 = 8 N [R]F2 = 21 N [R]F3 = 16 N [L]
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Physics

07/14/23

free body diagrams
Pls answer asap thankswhat is the net force of the following situationF1= 20N(E)F2= 34N(W)a) 20N(E)b) 54N(W)c)14N(E)d) 14N(W)
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Physics

07/14/23

free body diagrams
The net force on a brick is 45 N [L]. There are 3 forces acting on the brick. Determine the value of F1 based on the following information. A free-body diagram may help.F1 = ?F2 = 85 N [L]F3 = 27 N... more
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Physics

07/11/23

acceleration kinematics
While driving to work at 25 m/s [E], Jamaal sees a squirrel run out onto the street in front of him chasing an errant nut. Not wanting to hit the squirrel, Jamaal applies the brakes for 2.00 s to... more
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Physics

07/11/23

acceleration kinematics

At a nearby university, Professor Jones teaches a course called “circus stunts 101”. In the first lab of the year, students are launched out of a cannon and into a safety net, hopefully. When... more
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07/11/23

For the three-part question that follows identify each part with a coordinating response. Be sure to clearly label each part of your response as Part A, Part B, and Part C.
Use the following expression to answer the following questions. log 2 3Part A: What is the change-of-base formula?Part B: Name some common base choices used in the change-of-base calculation.... more
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Physics

07/11/23

C in the refractive index formula isn't equal to 3x10^8
Refractive index = c/v so c = Refractive index*v. if v = 2.29 x 10^8 and refractive index = 1.31 then c = 1.31*2.29x10^8, the answer comes = 299990000 but as we know c = 3*10^8 which is 300000000,... more
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Physics

07/11/23

Acceleration Kinematics
A truck is travelling at 22 m/s when the driver notices a speed limit sign for the town ahead. He slows down to a speed of 14 m/s. He travels a distance of 125 m while he is slowing down. How long... more
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Physics

07/11/23

acceleration kinematics
A racecar accelerates at 5.0 m/s2. If its initial velocity is 200 km/h, how far has it travelled after 8.0 s? A car that starts from rest can travel a distance of 50 m in a time of 6.0 s. What... more
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Physics

07/10/23

Max speed with a compressed spring involved
You have been hired to design a spring-launched roller coaster that will carry two passengers per car. The car goes up a 13-m-high hill, then descends 18 m to the track's lowest point. You've... more
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