12,724 Answered Questions for the topic physics

Physics

11/27/23

.|A rocket burns fuel at a rate of 285 kg/s and exhausts the gas at a relative speed of 10 km/s. Find the thrust of the rocket. Answer in units of MN.
A rocket burns fuel at a rate of 285 kg/s and exhausts the gas at a relative speed of 10 km/s. Find the thrust of the rocket. Answer in units of MN.
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Physics

11/27/23

How long will it take for her to reach the shuttle? Answer in minutes.
A(n) 52 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 57.9 m away from the shuttle and moving with zero speed relative to the shuttle. She has a(n) 0.551... more
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Physics

11/27/23

After we exert the same constant force for the same short time interval, the increase in the cart’s speed
A constant force is exerted for a short time interval on a cart that is initially at rest onan air track. This force gives the cart a certain final speed. Suppose we repeat theexperiment but,... more
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11/26/23

Two parallel wires question
Two parallel wires separated by 4.0 cm repel each other with a force per unit length 2.0 × 10-4 N/m. The current in one wire is 5.0 A. (a) Find the current in the other wire. (b) Are the currents... more
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11/26/23

Parallel Wires Question Physics
Two long, parallel wires separated by 2.50 cm carry in opposite directions. The current in on wire is 1.25 A, and the current in the other is 3.50 A. (a) Find the magnitude of the force per unit... more
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11/26/23

Magnetic field question
The magnetic field 40.0 cm away from a long, straight wire carrying current 2.00 A is 1.00 μT. (a) At what distance is it 0.100 μT? (b) at one instant, the two conductors in a long household... more
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11/26/23

Directionality Physics 2 Question
A long, straight wire lies on a horizontal table in the xy-plane and carries a current of 1.20 μA in the positive x-direction along the x-axis. A proton is traveling in the negative x-direction at... more
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11/26/23

Earth’s magnetic field question
The orientation of small satellites is often controlled using toque from current-carrying coils in Earth’s magnetic field. Suppose a multiturn coil has a cross-sectional area of 6.36 × 10-4 m2,... more
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11/26/23

Physics II Question
At a certain location, Earth has a magnetic field of 0.60 × 10-4 T, pointing 75° below the horizontal in a north-south plane. A 10.0 m long straight wire carries a 15 A current. (a) If the current... more
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11/26/23

Magnetic Field Question
A laboratory electromagnet produces a magnetic field of magnitude 1.50 T. A proton moves through this field with a speed of 6.00 × 106 m/s. (a) Find the magnitude of the maximum magnetic force that... more
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11/26/23

Physics 2 Homework Question
Consider an electron near the Earth’s equator. In which direction does it tend to deflect if its velocity is (a) directed downward? (b) directed northward? (c) directed southeastward?
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Physics

11/25/23

Q8: Prb 8 - Both being soft clay, they naturally stick together. What is their final velocity in meters per second?
Consider that a clay model of a kangaroo has a mass of 0.225 kg and moves on ice at a speed of 0.55 m/s. It crashes into another clay model, which is initially motionless and has a mass of 0.34 kg.
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Physics

11/25/23

Q8: Prb 7 - What is the velocity of the car, in meters per second, just after it hits a 165 kg deer initially running at 14 m/s in the same direction? Assume the deer remains on the car.
Consider a 915 kg car initially moving at 31 m/s.
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Physics

11/25/23

Q8: Prb 5 - This problem has two parts to this. I will type out the questions for each of the two parts along with additional info in "Description" below.
During an ice skating performance, an initially motionless 75 kg clown throws a fake barbell away horizontally. The clown's ice skates allow her to recoil frictionlessly.Part a) If the clown... more
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Physics

11/25/23

Q8: Prb 4 - Calculate the final velocity in the horizontal direction of the rugby player, in meters per second.

A 107.5 kg rugby player is initially running at 6.5 m/s in the positive direction, but collides head-on with a padded goalpost and experiences a backward force of 1.73*104 N for 5.55*10-2 s.
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Physics

11/25/23

Q8: Prb 3 - Compute the time required, in seconds, for a force of 1350 N to bring the car to rest.
A runaway train car that has a mass of 13500 kg travels at a speed of 5.5 m/s down a track.
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Physics

11/25/23

Q8: Prb 2 - This problem has four parts to this. I will type out the questions for each of the four parts along with additional info in "Description" below.
A cart of mass 4 kg is travelling to the right (which we will take to be the positive x-direction for this problem) at a speed of 8.8 m/s. It collides with a stationary cart that is three times as... more
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Physics

11/25/23

What is the nature of light – is it a particle or a wave?
This question has perplexed scientists for centuries and led to the development of quantum mechanics. Historically, debates revolved around whether light behaved like a particle (as suggested by... more
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Physics

11/25/23

Q8: Prb 1 - This problem has three parts to this. I will type out the questions for each of the three parts along with additional info in "Description" below.
A boy is riding a bicycle. The boy and the bicycle together have a combined mass of m = 147 kg and a linear momentum of magnitude P = 1072 kg*m/s. Part a) Write an expression for the boy's speed,... more
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Physics

11/24/23

Need Help with this Question

After six half-lives have gone by, what fraction of a sample of a radioactive isotope remains? Nf/No=
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Physics

11/23/23

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Physics

11/23/23

Need help picking which one best describes the answer

Pick the radioactive isotope in each set.  23793Np  2010NeIts atomic number is greater than 83.Its atomic number is less than 83. It has fewer neutrons than protons in the nucleus.It is an... more
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Physics

11/21/23

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Physics

11/21/23

ICA8 - This problem has three parts to this. I will state the questions for each of the three parts, along with any additional info below in "Description".
Consider a truck, with mass 3000 kg, moving at 10 m/s in space relative to a nearby planet. The truck has a crate with a bed, which has a mass of 300 kg. Part a) You devise a cannon that launches... more
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Physics

11/20/23

ICA8 - This problem has three parts. I will state the questions for each of the three parts, along with any additional info in "Description" below.
Modern cars have airbags to reduce the injury rate in accidents. Consider a crash in which the car is decelerated from 20 m/s to 0 m/s.Part a) If your mass is 75 kg, what is your change in momentum... more
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