02/09/21

. A grounded conductor is brought close to a positively charged insulator. What will happened to the electric potential of the conductor?
a) It will increase. b) It will decrease. c) It will remain constant.d) None of the above.
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02/09/21

Mass-spring system
A force of 16 N is required to stretch a spring a distance of 0.40m from its rest position. What force is required to stretch the same spring: (a) Twice the distance? (b) Three times the... more
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02/08/21

Need help in math class, Algebra 1
2−3√5
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02/08/21

Ice at 0oC is placed in a pan that is at room temperature. Which of the following best describe the heat flow and temperature changed for the ice-pot system?
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02/07/21

physics problem help??
A ball is tossed from a flat ground with UNKNOWN initial velocity V0. There is no air resistance. The total time of flight (time up +time down ) ball spends in air is 16 seconds. The initial... more
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02/07/21

A barrel ride at an amusement park is turning 2.30 rad/s when it starts to slow down. After making 2.00 revolutions, it is rotating at 1.11 rad/s. What was its angular acceleration?
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02/07/21

trigonometry homework
Write the following as an equivalent secant expression:  csc62degrees.You do not need to write the degree symbol in your answer.
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02/07/21

The stick is then set into motion. The period of the motion is __________
A meter stick is pinned at a point halfway between one end and the center of mass. The moment of inertia of this stick about its center is 1 2 cm 12 I mL = , where L is the length of the stick. The... more
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02/05/21

Two blocks are connected by a thin string
Initially, the 2.00kg block is held at rest and then released. Calculate the acceleration of the system. Ignore friction and air resistance. Assume the pulley is massless and that the string does... more
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02/04/21

the radius of the earth is 3960 miles. the distance along an arc on the surface of the earth that subtends a central angle of 5 minutes (1min. =1/60 degree) is approximately ( ? ) miles.

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02/02/21

What is the x- and y- component of this force vector?
An electrostatic force  has a magnitude of  and a direction of . What is the x- and y- component of this force vector?
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02/02/21

Calculate the magnitude
Calculate the magnitude of an electric field because of a positive charge of 2 uC at a distance of 0.5 m away?A. B.C.D.E. 100 X 10^-2 N/C
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02/02/21

How many seconds is the roller coaster at a height of 30 feet

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02/02/21

When a 0.622 kg basketball hits the floor, its velocity changes from 4.23 m/s down to 3.85 m/s up. What impulse was given to the ball?
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02/02/21

Pulley on the edge of a table
You again have a 25kg block (A) resting on a frictionless table; a cord attached to the block extends horizontally to a pulley at the edge of the table. A 7 kg mass (B) hangs at the end of the... more
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01/31/21

An object acted on by a constant force F moves from point 1 to point 2 and back again. The work done by the force F in this round trip is 95 J.
Can you determine from this information if F is a conservative or nonconservative force?a) YES/NO: b) EXPLANATION: If I grab a baseball and throw it in the air straight up as high as possible... more
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01/30/21

Coulumb's Law, Physics
a negative charge of 2.0*10^-4 c and a positive charge of 6.0*10^4 c are separated by 0.50 m. Please draw a diagram that correctly labels the magnitude and direction of the force acting on each of... more
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01/30/21

Scientists measured the temperature on planet Xenon over a certain time period and found that it grew according to the exponential function over that time. What was the initial temperature?
I need to find the initial value of these three equationst=500(300)^t-200Options for the first are : a) 0.-16 b)500 c)-200 d) 300t=800(500)^t-600options are: a)200 b)-0.05 c)-600... more
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01/29/21

A 1kg bird is flying 5m above the ground at a speed of 1m/s. What is the bird's total Mechanical energy?
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01/29/21

How high would a 51kg person running 7m/s swing if they on Mars? (3.7m/s^2)
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01/28/21

Two parallel wires, 1.00 m long are held 0.0254 m apart and have the same current flowing through each, in the opposite direction.

To create a 0.00100 N magnetic force, how much current must flow through the wires? (answer is not 11.27 or 11.23)
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01/28/21

Two parallel wires are 0.0623 m apart, and each carries a 3.25 A current in the same direction. The magnetic force between them is 5.05 x 10-4 N. How long are the wires? [?] m Length

(answer is not 14.85 or 14.89)
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01/28/21

An oil film (n = 1.42) floating on water is 84.8 nm thick. What is the wavelength IN NANOMETERS of the brightest (m = 1) reflected color?

(Hint: If you leave the wavelength in nm, the answer will be in nm) (no conversion necessary)
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01/28/21

Solve the system of linear equations by substitution. Check your solution.
2y + x = -4y - x = -5
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01/27/21

The speed of the object just before it hits the earth, in terms of G, M, and R is __________

An object is dropped from an altitude of one earth radius above the earth’s surface. Neglect air resistance. Let M = the mass of the earth and R = the radius of the earth. The speed of the object... more
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