05/17/21

Electric Potential
Electric Potential Formula: V= K*q/rElectric potential energy Formula: UE= Kq1q2/rWhat is the electric potential energy between a particle with 1*10^-9 C of charge and a particle with -1*10^-9 C of... more
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05/17/21

If a guitar string has a fundamental frequency of 440 Hz, what is the frequency of its sixth harmonic?
a. 880 Hzb. 1320 Hzc. 2640 Hzd. 83.3 Hz
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05/17/21

A walkway forms one diagonal of a square playground. The walkway is 30m long. How long is a side of the​ playground?

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05/16/21

The number y is 7 more than 4 times another number x. Their sum is 92. Find x and y. x=
The number  is 7 more than 4 times another number . Their sum is 92.Find x and yx=y=
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05/15/21

Guess the shape of the object from its moment of inertia
A uniform round object of mass M and radius R is placed on a at surface with initialangular velocity w0 as shown in the gure below. The moment of inertia of the object about the centerof mass is I... more
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05/14/21

Light traveling in glass with the index of refraction n1 of 1.52, is incident on a material with an index of refraction n2 of 2.35. Calculate the Brewster’s angle.
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05/13/21

Projectile Motion
A child throws a ball straight out a window at 4.5 m/s from a height of 7.5 m.How long does it take the ball to reach the ground? What is the ball’s landing velocity?
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05/13/21

How can I find the distance of 2 entities using mass and force?
A sales lady whose mass is 52 kg is doing a product demonstration in front of customers. Sheexerts a gravitational force of 7.45 x 10 -8 N on a 57 kg woman who is standing in the front row.How far... more
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05/12/21

John buys a pizza that has a 14-inch diameter and is cut into 12 congruent slices.

John buys a pizza that has a 14-inch diameter and is cut into 12 congruent slices. What is the length of the outer edge of any one slice of pizza , in inches? A- 7/6piB- 14/5piC-5/2piD-6/7pi
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05/11/21

Solve the following equation
Solve the following equation 2 sin^2 x = 6 cos^2x
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05/11/21

What is the wavelength of the waves?
Consider a wave generator that produces 5 oscillations per second. The speed of the waves is 2.5 m/s. What is the wavelength of the waves? a 1.55 m b 5.33 m c 0.5 m d 5.55 m
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05/10/21

Which is an incorrect way of writing 10C3 ?
Which is an incorrect way of writing 10C3? Please explain why for each thank you.A. 10P3 / 3!B. 10P3 / 7!C. 10! / 3!7!
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05/10/21

im cconfused pre cal assignment
A truck with 46-in.-diameter wheels is traveling at 50 mi/h.Find the angular speed of the wheels in rad/min, *hint convert miles to inches & hours to minutes: ____   rad/minHow many revolutions... more
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05/09/21

I need help for the below question
|||A proton is fired from far away toward the nucleus of a mercury atom. Mercury is element number 80, and the diameter of the nucleus is 14.0 fm. If the proton is fired at a speed of 4.0  107 m/s,... more
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05/08/21

Can someone please help me with this Geometry problem?
What is the perimeter of rectangle WXYZ with coordinates W (3, -4), X(3, -6), Y(-1, -6), and Z (-1, -4)?I got 11, is this correct?
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05/06/21

Forces and momentum
A ball of mass 0.125 kg moves with a velocity of 2 m/s. The ball hits another ball of mass 1 kg that is initially at rest. After the collision, the first ball recoils with a velocity of 1.5 m/s.... more
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05/06/21

Mechanical Energy: Kinetic Energy (EPE)
A spring with spring constant 275N/m has 25J of EPE stored in it. How much is it compressed? 
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05/05/21

This long ap frq is kicking my butt
Students conduct an experiment to study the motion of two toy rockets. In the first experiment, rocket X of mass mR is launched vertically upward with an initial speed v0 at time t=0. The rocket... more
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05/05/21

A rock is thrown with an initial velocity of 6 m/s at an angle of 30 degrees. What is the initial velocity of the rock in the x-direction?
6.9 m/s0.9 m/s3.0 m/s5.2 m/s
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05/04/21

Word problem using elimination
Thomas has $6000 invested among a checking account paying 2% annual interest, a savings account paying 5% annual interest and a bond paying 7% annual interest. He earns a total of $355 in annual... more
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05/04/21

Please help I am stuck
If the kinetic energy of a 3.8 kg falling rock is 3,760 J, the rock's speed is ____ m/s.
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05/04/21

help solve need help
The total energy of a 5.0 kg falling rock is 5000 J. If its potential energy is 2,090 J, the kinetic energy of the rock is ____ J.
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05/03/21

physics question
A sonic depth gauge is placed 4.4 m above the ground. An ultrasound pulse sent downward reflects off snow and reaches the device 0.024 seconds after it was emitted. The air temperature... more
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05/03/21

In a student laboratory exercise, the wavelength of a 52,300 Hz ultrasound wave is measured to be 0.662 cm. Find the air temperature (in K).
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05/01/21

When light goes from a lower index of refraction medium to a higher index of refraction medium a) It will bend towards the normal b) It will bend away from the normal
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