03/17/20

For the chemical reaction 2 HCl + Ca ( OH ) 2 ⟶ CaCl 2 + 2 H 2 O how many moles of calcium chloride (CaCl2) are produced from 2.0 mol of hydrochloric acid (HCl)
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03/10/20

Interesting physics problem
Please share your solution with me.On a lightweight 3x rod at x distance from both ends, two weights of mass m and 2m are fixed, and the rod itself is horizontally suspended with the threads tied... more
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03/09/20

A hunter shoots a 0.002 kg bullet at a deer 50 meters away. If the bullet accelerates at 2.5 x 105 m/sec2 and the mass of the gun is 2.5 kg, how many newtons of force is exerted on the bullet?
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03/09/20

An object experiences a 8.1 N force and accelerates 8.7 m/sec2. What is the object's mass?
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03/09/20

A 7,481 kilogram truck receives a force of 1,679 N find the truck's acceleration? Report your answer to 3 decimal places.
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03/08/20

What is the intensity of the transmitted light?
Vertically polarized light with an intensity of 0.60 W/m2 passes through a polarizer whose transmission axis is at an angle of 45 degrees  with the vertical.What is the intensity of the transmitted... more
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03/04/20

Waves equation problems
1.Water waves at a lake cross a distance of 5 m in 2.7 s. The period of oscillation is 2 s. What is the wavelength of the water waves?2.One pulse is generated every 0.76 s in a tank of water. What... more
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03/04/20

Waves equation problems
1.A person yells across a canyon and hears the echo 9.7 seconds later. If the speed of sound is 344.9 m/s, how far away is the other side of the canyon?2.Radio station WKLB in Boston broadcasts at... more
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03/03/20

In the circuit seen here, the resistor has a resistance of 3 ohms. If no change in the battery size occurs, what will happen to the current if the resistance increases to 6 ohms?
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03/02/20

Which tools will be most helpful to a scientist measuring motion
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03/01/20

Calculate the deceleration of a snow boarder going up a 5degree slope assuming the coefficient of friction for the waxed wood on wet snow
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02/29/20

A Raffonian standing on a scale in an elevator accelerating upwards at 1.3m/s2 reads 424N. What is the mass of the Raffonian?

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02/29/20

Physics thermodynamics
How much the temperature of glass of water will rise after 2100 J heat. Volume of the glass is 250 cm^3? From what height should 1 l of water fall for its temperature to increase 1 degree celsius.... more
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02/29/20

What is a good investigation I can conduct producing quantitative results?
I have a science assignment in which I need to conduct an experiment, any experiment of my choice, which needs to produce quantitative results to test the relationship between two variables.
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02/29/20

How long would a 150 W lightbulb have to glow to produce the same amount of energy expended by Georgie? Answer in units of s.
Georgie was pulling her brother (of mass 28 kg) in a 9.1 kg sled with a constant force of 23 N for one block (112 m). How much work did Georgie do? Answer in units J I dont know how to do this
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02/29/20

Perfectly Inelastic Collision
Two blocks are sliding along a frictionless track. Block A (mass 3.30 kg) is moving to the right at 1.70 m/s. Block B (mass 3.96 kg) is moving to the left at 2.04 m/s. Assume the system to be both... more
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02/25/20

Physics Dynamic Friction

Include Free Body Diagram 11. A 70-kg skier slides down a hill inclines at an angle of 12 ̊ with the horizontal... a. Calculate the skier’s acceleration if opposed by a 100-N friction force. b.... more
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02/22/20

A 1500 kg mass car travelling at 25 m/s hit a wall. The front of the car is 0,5 m compressed.
Find: Force the wall acted on car Acceleration of the car Acceleration the driver was being stopped, if the seat belts let him move 20 cm forward (tenseness of seat belts during the stop didn't... more
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02/21/20

physics question 2
The PV  diagram in the figure shows two possible states of a system containing 1.75 MOLES of a monatomic ideal gas. P1 = P2. 425 = N/m^2 , V1 = 2.00 m^3 , V2 = 8.00 m^3 .Find the work done by the... more
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02/18/20

The average velocity of a plane during a flight was 9.0 m/s. How long did it take the plane to travel 5.0 km? Kinematic Equation which may help with this problem.
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02/17/20

A car initially traveling at 4 m/s accelerated uniformly to a speed of 15 m/s over a distance of 2 meters. What is the magnitude of the car's average acceleration?
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02/17/20

I have a question about Physics I would like to understand...

Bats rely on sound localization to be able to fly during the night. On a cool 20 °C summer night, a bat produces an ultrasonic sound with a frequency of 39 kHz.What is the wavelength of this... more
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02/17/20

Fall time under g is sqrt 2h/g. Can someone give a derivation from the equations of motion please? Thanks.
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02/16/20

physics question
The value of specific heat for copper is 390 J/KG , for aluminun is 900  ,and for water is 4186 .What will be the equilibrium temperature when a 275 G block of copper at 245 celsius is placed in a... more
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02/16/20

physics question
A 54- ice-skater moving at  6.5 m/s glides to a stop. Assuming the ice is at 0 celsius and that 50% of the heat generated by friction is absorbed by the ice, how much ice melts? The heat of fusion... more
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