12/12/23

Magnitude done by Kinetic Friction-Have answer need help getting there.
A box weighing 12 N has an initial speed of 2.1 m/s. As it slides acrossa level floor it comes to a stop in 3.2 m due to kinetic friction. What is the magnitudeof the work done by the kinetic... more
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12/07/23

Mass and its relationship with velocity!

While practicing your curling technique, You have two curling stones, Stone A with mass m and stone B with mass 2m. If you push each of them forward (starting from rest) with same constant force... more
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12/07/23

Work done in physics

A crane at a construction site slowly lowers a concrete pillar hanging from a vertical steel cable. The pillar descends with constant velocity. For each of these following statements, mark if they... more
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12/07/23

I Need Some Help With This Physics Problem
Calculate the mass (in kg) of the Sun based on data for Uranus's orbit. (Use G = 6.67 ✕ 10−11 N · m2/kg2 in your calculations. Round your answer to at least four significant figures.) Also, compare... more
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12/06/23

Physics-submarine depth
A research submarine has a 40-cm-diameter window that is 8.2 cm thick. The manufacturer says the window can withstand forces up to 1.1×106 N.What is the submarine's maximum safe depth in sea water?... more
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12/04/23

find the Maximum energy released in the completely inelastic collision of this object with Earth
On Oct 31 2015, massive asteroid TB145 nicknamed "Spooky" passed near the Earth vicinity. The measured diameter of the asteroid: 400meters , and its speed relative to the Sun: 33.0 km/s. (NOTE you... more
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12/03/23

A metal rod is heated from a temperature of 300 K to a temperature of 350 K. For which material would the change in the length of the rod be smallest?
A. Aluminiumb. Copperc. Steeld. Leade. Bronze
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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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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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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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11/25/23

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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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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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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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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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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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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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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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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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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11/14/23

I don't understand how to get the answer
A quantity of steam (250 g) at 118°C is condensed, and the resulting water is frozen into ice at 0°C. How much heat was removed?
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11/13/23

Q7 - This problem has three parts. I will list the questions for all three parts and any additional info below in "Description".
A 500 lb steel beam is lifted up by a crane to a height of 100 ft and is held there. Part a) How much work is being done to hold the beam in place?Part b) How much work was done by the crane to... more
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11/13/23

Q7 - This problem has four parts. I will list the questions for each of the four parts, and any other additional info in the "Description" below.
Suppose the ski patrol lowers a rescue sled carrying an injured skier, with a combined mass of 82.6 kg, down a 60.0° slope at a constant speed. The coefficient of kinetic friction between the sled... more
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11/13/23

Type your answer with numbers only, units are already included for you. Round to the tenths place.

A triceratops (Sara), when running, has a velocity of 3.8 m/sec. After a short dash for 3.6 seconds, she makes impact with an ankylosaurus (Tank) with a force of 435 N. How much work did Sara... more
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11/13/23

Q7 - This problem has two parts. I will list the questions for both parts and any additional info in the "Description" below.
Suppose a 77.5 kg sprinter accelerates from rest to 8.5 m/s in 3.15 s.Part a) What is the power output, in watts, of the sprinter?Part b) What is the power output, in horsepower, of the sprinter?
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11/13/23

Q7 - This problem has three parts. I will list the question for each of the three parts as well as any other additional info below in "Description".
The speed of a box traveling on a horizontal frictional surface changes from vi = 16 m/s to vf = 11 m/s in a distance of d = 9.5 m. Part a) How long in seconds did it take for the box to slow by... more
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