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Dante Velez
Physics
The frequency of which type of electromagnetic wave is just higher than that of visible light?
A.
infrared waves
B.
gamma rays
C.
x-rays
D.
radio waves
E.
ultraviolet rays
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Ashlyn Cervantes
Physics
Two circular coils are concentric and lie in the same plane. The inner coil contains 140 turns of wire, has a radius of 0.015 m, and carries a current of 7.2 A. The outer coil contains 180 turns and has a radius of 0.023 m. What must be the magnitude and direction (relative to the current in the inner coil) of the current in the outer coil, so that the net magnetic fi eld at the common center of the two coils is zero
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Mia Yates
Physics
Which best describes how magnesium (mg) and oxygen (o) bond? they form an ionic bond by exchanging two electrons. they form an ionic bond by exchanging three electrons. they form a covalent bond by sharing one electron. they form a covalent bond by sharing four electrons.
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Aryan Mayer
Physics
The coefficient of linear expansion of steel is 12 * 10-6 k-1. what is the change in length of a 25-m steel bridge span when it undergoes a temperature change of 40 k from winter to summer?
a. 1.2 cm
b. 1.8 cm
c. 1.4 cm
d. 2.0 cm
e. 1.6 cm
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Sophie Parks
Physics
You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s. Calculate the energy.
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Nick Cortez
Physics
Three ideal polarizing filters are stacked, with the polarizing axis of the second and third filters at 21 degrees and 61 degrees, respectively, to that of the first. If unpolarized light is incident on the stack, the light has intensity 60.0 w/cm
2
after it passes through the stack.
If the incident intensity is kept constant:
1) What is the intensity of the light after it has passed through the stack if the second polarizer is removed?
2) What is the intensity of the light after it has passed through the stack if the third polarizer is removed?
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Jazmine Ramsey
Physics
What does an electric current produce
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Clarissa
Physics
A series circuit contains three 2 Ω resistors and a 6 Ω resistor. The current in each resistor is 4.0 A. What is the voltage of the battery in the circuit? 2.0 V 3.0 V 32 V 48 V
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Niko Murphy
Physics
A solid metal ball and a hollow plastic ball of the same external radius are released from rest in a large vacuum chamber. When each has fallen 1 m, they both have the same?
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Jayvon Dudley
Physics
Juan is interested in finding out whether hummingbirds are attracted to some flowers more than others. In what order should Juan perform the steps of his experiment?
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Miranda Aguirre
Physics
Will make Brainlest! <3
Metals are considered to be good conductors of heat. How do the specific heat values indicate this?
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Karlie Reed
Physics
Which example identifies a change in motion that produces acceleration? choices are: 1. a speed skater moving at a constant speed on a straight track 2. a ball moving at a constant speed around a circular track 3. a particle moving in a vacuum at constant velocity 4. a vehicle moving down the street at a steady speed user: how did the great depression eventually change germany politically? choices are: 1. germans eventually believed that democracy would solve their economic problems. 2 ...
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Aaliyah Sanders
Physics
Which of the following diagnostic procedures uses ultrasound?
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Woodard
Physics
Why is it easier to read black text on a white background than to read green text of any light color?
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Willow Mcknight
Physics
If object A has more mass than object B, does object A contain more matter? Explain.
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