12,725 Answered Questions for the topic physics

Physics

11/20/23

ICA8 - How fast are these objects moving immediately after the collision?
A 1200 kg car moving to the right at 15 m/s collides with the back of a 2500 kg truck moving at 4 m/s, also to the right. After the collision, the two objects are stuck together.
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Physics

11/20/23

What is the magnitude of the average force acting on the ball during the collision? Answer in units of N.
A 535 g ball strikes a wall at 15.5 m/s and rebounds at 12.3 m/s. The ball is in contact with the wall for 0.039 s. What is the magnitude of the average force acting on the ball during the... more
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Physics

11/20/23

How fast must a Ping-Pong ball of mass 3.24 g move in a straight line so that the two balls have the same momentum? Answer in units of m/s.
A bowling ball of mass 7.8 kg moves in a straight line at 4.5 m/s. How fast must a Ping-Pong ball of mass 3.24 g move in a straight line so that the two balls have the same momentum? Answer in... more
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Physics

11/20/23

Confused on how to get the answer

Neon (10Ne) has three stable isotopes with consecutive mass numbers. Write the complete nuclear symbol (with neutron number) for each.
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Physics Calculus

11/20/23

Work required to pump the liquid out of the bucket
Create a bucket by rotating around the y-axis the curve y=5ln(x-6) from y = 0 to y = 8. If this bucket contains a liquid with density 760 kg/m3 filled to a height of 4 meters, find the work... more
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Physics

11/20/23

What is the "apparent" weight of a 80kg person standing on a bathroom scale in an elevator accelerating upward at a rate of 2 m/s/s?

The difference between "apparent" weight and your "gravitational" weight is simple. Gravitational weight is dependent on your mass and the strength of the gravitational field you are in. Apparent... more
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Physics

11/19/23

A 3.48-kg mass is moving in an idealized frictionless tube.
Initially, the tube runs straight for 1.18 meter horizontally at ground level before rapidly curving to turn vertically upwards, as shown in the figure. The vertical portion of the tube is... more
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Physics

11/19/23

projectile range equation with spring force
A group of bored kids at a skate park decide to build a launcher out of elastic exercise bands (i.e., stretchy strips of rubber or a bungee cords) and a wood ramp. They tie several bands to two... more
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Physics

11/18/23

Please Solve This Physics Problem
A particle of mass 4.4 kg has position vector r = (1.9î − 2.6ĵ) m at a particular instant of time when its velocity is v = (2.6î) m/s with respect to the origin. (Express your answers in vector... more
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Physics

11/18/23

PS7 - In units of kilograms per minute, what is the rate that coal can be lifted from the mine?
Coal is being lifted a vertical distance of 49.9 m from a mine by an engine that supplies 399 W of power.
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Physics

11/18/23

PS7 - If the cyclist starts coasting at the bottom of the hill, what distance, in meters, does the bike travel up the incline?
A cyclist, starting from rest, applies a horizontal force of F = 317 N to his bicycle, moving across flat ground for a distance of dflat = 283 m before encountering a hill making an angle of θ =... more
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Physics

11/17/23

PS7 - This problem has two parts. I will list the questions for both parts and additional info below in "Description".
A hiker of mass 69 kg is going to climb to the top of Mount Tam, which has an elevation of 2,574 ft.Part a) If the hiker starts climbing at an elevation of 530 ft, what will their change in... more
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Physics

11/17/23

Please Solve This Physics Problem
A horizontal beam of length 4 m and mass 8.0 kg has a mass of 3.0 kg and width 0.8 m sitting at the end of the beam. What is the torque due to gravity (in N · m) on the beam–block system about the... more
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Physics

11/15/23

What position in cm do you expect the water column to be on the y-axis in order to open the valve?
Relief valves keep the pressure of a vessel from exceeding some threshold by opening to release fluid. You are designing a pressure relief valve with a 1,816 N/m spring pushing a 5 cm diameter disk... more
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Physics

11/15/23

The human eye is sensitive to yellow-green

The human eye is sensitive to yellow-green light having a frequency of about 5.5  1014 Hz (a wavelength of about 550 nm). What is the energy in joules of the photons associated with this light?
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Physics

11/15/23

I need some help plz!
Find the force (in N) of electrical attraction between a proton and an electron that are 8.8 ✕ 10−11 m apart.Compare this to the gravitational force between these particles. (Enter the... more
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Physics Math Science Biology

11/15/23

Resistor and Capacitor Arrangements
Three capacitors are connected as shown in the figure. What is the equivalent capacitance between points A and B? Please explain the steps leading to your answer.If you were to swap all capacitors... more
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Physics

11/15/23

Don't really understand this question!
Use the table to determine the energy in eV of the photon emitted when an electron jumps down from the n = 3 orbit to the n = 2 orbit of a hydrogen atom. Allowed Values of the Hydrogen Electron's... more
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Physics

11/15/23

Need some help with this question
The human eye is sensitive to blue light having a frequency of about 6.4  1014 Hz (a wavelength of about 475 nm). What is the energy in joules of the photons associated with this light?
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Physics

11/15/23

ICA7 - This problem has five parts. I will state the questions to each of these five parts and any additional info in "Description" below.
A 1.0 kg box is launched from rest by a compressed horizontal spring. The spring has a constant k = 500.0 N/m and is compressed by 30.0 cm. The block slides on a track down a hill and comes to rest... more
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Physics Science

11/14/23

Heat Transfer│Please Help!
49 g of an unknown metal is heated to a temperature of 150.0 C. A calorimeter is filled with 120.0 g of water at an initial temperature of 20.0 C. The specific heat capacity of water is 4.184... more
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Physics Science

11/14/23

Heat Capacity│Please Help!
A substance at a starting temperature of 375 K is cooled to 196 K. Select ALL of the statements below that must be true.a. ΔT is positiveb. ΔT is negativec. Q is positived. Q is negativee. specific... more
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Physics

11/14/23

Q7 - What is the force constant, k, of the spring in N/m?
A 4.8*105 kg locomotive is brought to a halt from a speed of 0.75 m/s in 0.45 m by a large spring bumper at the end of its track.
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Physics

11/14/23

Potential energy
A magnetized sewing needle has a magnetic moment of 9.70x10−3Am2 . At its location, the Earth’s magnetic field is 55.0 T northward at 48.0o below the horizontal. Identify the orientations of the... more
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Physics

11/14/23

Q7 - This problem has two parts. I will state the questions for each of those two parts, as well as any other additional info below in "Description".
A tennis ball of mass m = 0.076 kg is thrown straight up with an initial speed v0 = 12 m/s. Let the gravitational potential energy be zero at the initial height of the tennis ball. Part a) What is... more
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