12/11/20

please help me please!! :(
Calculate the current in the above circuit when closed, for a 1.5 V battery and a 3 Ω bulb
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12/11/20

5 Part Physics Question - Could somebody please help, please explain your answers to me, it would help me a lot
Three blocks move on a surface with μs = 0.6 and μk = 0.4 as shown below. Jennifer, anotherhonor chemistry student, applied 34 N of force to move the system of three blocks, but shefailed. Assume... more
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12/11/20

Find the effective coefficient of kinetic friction between the car and the road.
A 1350-kg car is traveling on a wet road at 22 m/s. The driver suddenly sees a fallen tree on the road and slams on the breaks. The car comes to a stop after skidding a distance of 44.0 m. Find... more
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12/10/20

If bats emit a chirp at a frequency of 9.68 104 Hz, and if the speed of sound in air is 343 m/s, what is the smallest insect a bat can detect?
A bat can detect small objects, such as an insect, whose size is approximately equal to one wavelength of the sound the bat makes. If bats emit a chirp at a frequency of 9.68  104 Hz, and if the... more
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12/10/20

magnitude of acceleration
A proton is placed in an electric field with a magnitude of 8.1 x 10^6 N/C. What is the magnitude of the proton’s acceleration? The mass of a proton is 1.67x10^27 kg. The charge of a proton is... more
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12/10/20

what is the electric field

A point charge Q is far from all other charges. At a distance of 4 m from Q, the electric field is 40 N/C. What is the electric field at a distance of 8m from Q?
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12/09/20

Physics Question:
Use the parallelogram method (for questions 4-6) to add the following vectors, and solve for the resultant of each. Be sure to label each vector with its magnitude on the diagram. Write your answer... more
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12/09/20

How would you solve this problem? I think you would just use v=change in x/ time, but I am unsure.
An object is pushed off a 0.7 meter tall table with an initial horizontal velocity of 1.2 m/s (vx = 1.2 m/s). How long does it take for the object to reach the floor?
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12/07/20

Challenge I need to know the steps
Karen used a birthday check her mother gave her to start a savings account. She plans to save $25 per month as well. After 8 months, Karen had $250.Define your variables and derive an equation to... more
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12/07/20

Which equation represents the line that passes through the points (–3, 7) and (4, 10)?
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12/07/20

A permanent magnet is moved toward a 320-turn solenoid such that the magnetic field inside the solenoid increases from zero to 0.50 T in 0.75 s. The radius of the solenoid is 0.035 m.

A permanent magnet is moved toward a 320-turn solenoid such that the magnetic field inside the solenoid increases from zero to 0.50 T in 0.75 s. The radius of the solenoid is 0.035 m. The ends of... more
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12/05/20

Find the air temperature (in K).
In a student laboratory exercise, the wavelength of a 52,300 Hz ultrasound wave is measured to be 0.660 cm. Find the air temperature (in K).
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12/05/20

What is the total entropy change for a 0.350 kg piece of ice at an initial temperature of 0.00 degC if it is placed in a Styrofoam cup having 2.22 kg of water at an initial temperature of 22.9 degC.

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12/04/20

please help me!! :(
On a windy morning, a hot air balloon starts rising and flying away from the top of a hill. The altitude, h, in feet, of the balloon x hours after starting its ascent from the hill, can be modeled... more
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12/04/20

please help me quick i've been stuck on this question forever :(
If (x - 3)2 = 5, then what values of x make the quadratic equation true? Write your answer in brackets.
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12/04/20

please help me quick i've been stuck on this question forever
When the expressions x2 – 9 and x2 – 5x + 6 are factored, what factor do they have in common?
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12/04/20

Solve for the acceleration of the system and the tension on the cable if m1=5kg and m2=8kg
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12/03/20

How far (in m) is the surface of the snow from the device?
A sonic depth gauge is placed 4.2 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.023 seconds after it was emitted. The air temperature is −20°C.(a)... more
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12/03/20

Newton’s 2nd Law:
A wooden block is pulled at a constant acceleration of 1.4 m/s2.Find the net applied force on the block if its mass is 0.6 kg.
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12/02/20

Question of Math
Given the following information, write an equation in standard form to represent the specific line that is perpendicular to 2x - 5y = 10 and has the same y-intercept as 3x - 4y = -12.I need to know... more
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12/02/20

what factor will the amplitude of the sound change?
An audio speaker producing a steady sound at an outdoor concert is 32 ft away from you. If you move to a position where the speaker is 64 ft distant, by what factor will the amplitude of the sound... more
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11/30/20

A student is pulling a 15 kg cart up a ramp with a rope that is parallel to the surface of the ramp.

A student is pulling a 15 kg cart up a ramp with a rope that is parallel to the surface of the ramp. If the ramp is angled at 25 degrees, calculate the following:Draw the FBD for this... more
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11/29/20

Sound Physics Question
Estimate the amplitude and the wavelength of this function.
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11/29/20

Sound Multiple Choice Physics Question
Which of the following conditions is generally used to describe a sound as "ultrasonic"?A. vobject > 5vsoundB. fsound < 20,000 HzC. vobject > vsoundD. fsound > 20,000 Hz
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11/26/20

A particle (m = 4.1 × 10-28 kg) starting from rest, experiences an acceleration of 2.4 × 107 m/s2 for 5.0 s. What is its de Broglie wavelength λ at the end of this period?
A particle (m = 4.1 × 10-28 kg) starting from rest, experiences an acceleration of 2.4 × 107 m/s2 for 5.0 s. What is its de Broglie wavelength λ at the end of this period?
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