10/10/22

need help with this math world problem

A satellite dish is in the shape of a paraboloid. Cross sections taken parallel to the direction the dish opens are parabolic. Cross sections taken perpendicular to the direction the dish opens are... more
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10/09/22

what newton's law is periodic motion and oscillatory motion?
what newton's law is periodic motion and oscillatory motion?
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10/07/22

a kitten pushes a ball of yarn rolling toward it at 0.0600 m/s with its nose, moving the ball of yarn 0.475m in the opposite direction in 2.00s. what is the acceleration of the ball of yarn
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09/29/22

I need to figure out the steps to solve these types of equations plz help me, thanks.

D is the midpoint of CE. If CD=6x and CE=10x+10, what is CE
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09/29/22

Magnitude and Force
A body of mass 3 kg moves in a (counterclockwise) circular path of radius 9 meters, making one revolution every 12 seconds. You may assume the circle is in the xy-plane, and so you may ignore the... more
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09/29/22

Position Functions and Minimum Speed
The position function of a particle is r(t) = <-t^2 , 5t, t^2 -4t>.At what time is the speed minimum. I took the derivative of the position function, then took the magnitude of that and set... more
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09/27/22

On dry concrete, a car can decelerate at 6.0m/s2, whereas on wet concrete it can decelerate at only 5.0m/s2.
(a) Find the distance necessary to stop a car moving at 24.0m/s24.0m/s on dry concrete.=(b) Find the distance necessary to stop a car moving at 24.0m/s24.0m/s on wet concrete.=(c) Repeat both... more
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09/17/22

Can you help me with this problem??
At the half way mark of a 200 meter race the lead runner is running at a uniform speed of 10.3 m/s. The contestant in the second position is running at a speed of 10.1 m/s is 2 meter behind the... more
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09/16/22

How to find net change
A function is given.f(z) = 3 − 4z2;    z = −2, z = 0(a) Determine the net change between the given values of the variable.(b) Determine the average rate of change between the given values of the... more
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09/16/22

G is the midpoint of FH. If FG = x + 8 and GH = 2x, what is FG?
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09/15/22

Newton's 2nd Law Based Question
A car with a mass m = 1280 kg is moving at a speed s = 25.9 km/h and needs to stop in a distance d = 30.5 m. a) Write an expression for the magnitude of the net force on the car as it is stopping... more
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06/30/22

Interesting physics problem about a bullet piercing through an object
A cube made of foam with mass of 100g is placed on a weak horizontal surface. The height of the cube is 10 cm. Then, a person shoots a bullet underneath the cube. The initial velocity of the bullet... more
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06/30/22

Physics: calculate the impulse
A molecule with initial velocity of v = 600 m/s strikes into a container wall. The angle between molecule's initial direction and the wall is α = 25°. The collision is absolutely elastic. Calculate... more
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06/10/22

Compute for the resistivity of the wire
1. The graph below shows the current vs. voltage characteristics (IV) graph of a filament lamp. At 4.0 V, the current of the filament lamp is?A. 8x10^-3 AB. 0.5x10^-3AC. 16x10^-3AD. Need more... more
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06/10/22

Calculate for Electric Circuits
For items no. 17-21, refer to this figure.17. What is the equivalent resistance of the circuit?18. If the circuit is connected to a 12 V source, how much power is supplied to the circuit?19. How... more
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06/09/22

Card Deck Probability
Five cards are dealt from a regular deck of 52 cards. (Recall that a regular deck of 52 cards consists of 13 kinds/denominations, each having 4 suits: ♥, ♦, ♣ ♠.)Part a)What is the probability that... more
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06/08/22

Express (1- 3sin^2 θ) (1- 4cos^2 θ) in terms of cos 2θ.
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06/05/22

Ferris wheel problem
A Ferris wheel is boarding platform is 4 meters above the ground, has a diameter of 72 meters, and rotates once every 10 minutes.How many minutes of the ride are spent higher than 48 meters above... more
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06/05/22

A particle under double-exponential potential
A particle of mass m is constrained to move along the x-axis. It's potential energy is given by: U(x) = U0 [ e−2β(x−x0) − 2e−β(x−x0) ] where U0, β, and x0, are known parameters.a) Assume that the... more
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06/04/22

Please help me out
Find the volume of the tertrahedron with vertices (0, 0, 0),(2, 0, 0), (0, 4, 0) and (0, 0, 6).
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06/03/22

The slope of the tangent line at any point (x, y) on a curve is 3 √𝑥. If the point (9, 4) is on the curve, find an equation of the curve.
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06/01/22

What is the equation of a line containing point (2, 5) and has the same slope as the line 4x – 2y = 12?
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05/30/22

CALCULATE THE THREE RESISTORS.
Three resistors R1, R2, and R3 are connected in series-parallel with R1 in series with the parallel combination of R2 and R3. The whole combination is connected across a 140 V source. Resistors... more
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05/09/22

A pet store has 25 blue parakeets , 12 green parakeets and 10 yellow parakeets. If two parakeets are randomly selected, what is the probability that one is blue and one is yellow?
The answers are:A. 0.1388B. 0.1156C. 0.2252D. 0.5745
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05/09/22

A 12-ohm resistor is in series with an 8-ohm load. Find the total source voltage if the voltage across the 12-ohm resistor is 40 Volts?
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