4,365 Answered Questions for the topic Science

Science Physics

12/03/20

What is the frequency of the wave (in Hz)?
A wave traveling 91 m/s has a wavelength of 5.6 m. What is the frequency of the wave (in Hz)?
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12/03/20

what is the speed of waves on the Slinky (in m/s)?
A 5.2 Hz continuous wave travels on a Slinky. If the wavelength is 0.61 m, what is the speed of waves on the Slinky (in m/s)?
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12/03/20

Size of the Moon Question
Let’s say you were to do an experiment using a coin that helps to find the distance from earth to moon through measuring the distance between your eye and the moon with the coin. This will later... more
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Science English

12/03/20

what caused Climate Change
 The cause/problem.
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Science Physics

12/03/20

The physical phenomenon responsible for the heating of the resistors at the passing of the electric current is called?
When passed by an electric current, the resistors suffer great temperature raise, being that way utilized in electrical ovens, grills and in hair dryers.a) Meissner effectb) Joule effectc) Doppler... more
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Science Physics

12/03/20

Analyze the following statements about a circuit containing three resistors with different resistances, associated in parallel and submitted to a different potential.
Verify if the statements are true or false.1 - The resistance of the equivalent resistor is smaller than the smallest of resistances of these resistors.2 - A electrical current is smaller in the... more
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Science Physics

12/03/20

Three equal resistors of 30 OHM resistance are together in parallel with a 12 V battery attached. The equivalent resistance of this circuit is?
A) 10 OHM, with the current being 1.2 AB) 20 OHM, with the current being 0.6 AC) 30 OHM, with the current being 0.4 AD) 40 OHM, with the current being 0.3 AE) 60 OHM, with the current being 0.2 A
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Science Physics

12/03/20

Given that the effective resistance is 2 OHM, how much is worth the resistance of each one of these OHMS resistors.
Three equal Resistors are put up in a way in where two are related between themselves and at the same time in parallel with the third resistor. Given that the effective resistance is 2 OHM, how... more
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Science Physics

12/03/20

Two resistors are submitted to a 12 V potential. When linked together, the current is of 1.33 A. When in parallel, the current is of 5.4 A. What are the values of their resistances?
A) 4 OHM and 5 OHMB) 4 OHM and 2 OHMC) 7 OHM and 2 OHMD) 5 OHM and 1 OHME) 4.5 OHM and 4.5 OHM
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Science Physics

12/03/20

An Ohmic Resistor of electrical resistance of 1500 OHM is passed through an electrical current of 1 mA. Determine the potential difference applied to the terminals of this Resistor!
a) 1.5 Vb) 2.5 Vc) 5 Vd) 7.5 Ve) 0.25 V
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Science Physics

12/03/20

Ohmic Resistors are those who?
a) Are made of insulating materialsb) Have constant electrical resistancec) Present great electrical resistanced) Are able to withstand great electrical currentse) Are usually made of conductor... more
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Science Physics

12/03/20

An Ohmic Resistor is crossed by a 0.5 A current, while plugged in to a 12 V battery. The electrical resistance of this Resistor equals?
a) 24 OHMb) 4 OHMc) 8 OHMd) 12 OHMe) 6 OHM
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Science Physics

12/03/20

Which of the following statements are true and which are false?
1 - The resistance of the equivalent resistor is smaller than the smallest of resistances of these resistors.2 - A electrical current is smaller in the biggest resistance' resistor3 - The... more
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12/02/20

What is the linear mass density of the rope (in kg/m)?
Two children stretch a jump rope between them and send wave pulses back and forth on it. The rope is 4.1 m long, its mass is 0.60 kg, and the force exerted on it by the children is 55 N.(a)What is... 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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Science Chemistry

12/02/20

Calculate the amount in moles
Calculate the amount in moles: 2.01 x 10^23 atoms of Rubidium a. 1.2 molb. None of the abovec. 3.11 mold. 0.5 mole. 1 mol
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12/02/20

meter stick urgent help
A uniform meter stick of mass 1.5kg is attached to the wall by a frictionless hinge at one end. On the opposite end it is supported by a vertical massless string such that the stick makes an angle... more
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12/02/20

Pencil urgent help
A pencil leans against a wall so that its sharpened edge rests against the vertical surface of the wall and its eraser rests on the floor. The center of mass of the pencil is 9 cm from the end of... more
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12/02/20

piece of putty urgent help
A piece of putty of mass m = 0.75 kg moves at a velocity of v = 2.5 m/s along a horizontal frictionless surface. It hits and sticks to the bottom of a rod of mass M = 2 kg and length L = 0.9 m... more
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12/02/20

How do scientists perform intercellular colonization of non-leguminous plants by rhizobia? How do they make the bacteria enter the said plants?
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Science Physics

12/01/20

physics question - answer is 233 N but idk how to do this
A more aggressive snowboarder decides that rain is perfectly OK. She goes up to Snoqualmie Pass to board down the slopes in the rain. The angle of the slope is 36.0°. She is sliding down the... more
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Science Physics

12/01/20

physics question
A block of mass 10 kg slides down an inclined plane elevated 30◦ to the horizontal. If the coefficient of kinetic friction is 0.6, find the acceleration of the block.
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Science Biology

11/30/20

Question about osmosis

How does placing carrots in water keep them crisp and fresh? Explain using the words solute, water, hypertonic, hypotonic, and isotonic.
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11/30/20

What is the total mass (in kg) of water vapor in the air in the apartment?
An apartment has the dimensions 15 m by 8 m by 5 m. The temperature is 25°C, and the relative humidity is 57 percent. What is the total mass (in kg) of water vapor in the air in the apartment?
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11/30/20

 At what temperature would the wing be 2 cm (0.02 m) shorter?
An aluminum wing on a passenger jet is 28 m long when its temperature is 15°C. At what temperature would the wing be 2 cm (0.02 m) shorter?
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