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Physics

Yasmine Ball

On a distant planet a freely falling object has an acceleration of 20m/s. what vertical distance will an object dropped from rest on this planet cover in 1.8

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Physics

Laney Mccoy

Complete this equation that represents the process of nuclear fission.

Superscript 239 Subscript 94 Baseline P u + Superscript 1 Subscript 0 Baseline n yields Superscript A Subscript B Baseline B a + Superscript 91 Subscript 38 Baseline S r + 3 Superscript 1 Subscript 0 Baseline n

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Physics

Wade Kelley

A particular electrical signal being transmitted to a neuron is sufficient to generate an action potential. If the magnitude of the incoming electrical signal is doubled, the action potential will

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Physics

Aurora Ponce

This part of the electromagnet spectrum produces heat and with special equipment can locate people at night.

infrared waves

microwaves

X-rays

gamma rays

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Physics

Harley Boyd

An ambulance is traveling east at 51.6 m/s. Behind it there is a car traveling along the same direction at 32.3 m/s. The ambulance driver hears his siren at a frequency of 615 Hz.

32.3 m/s Car

51.6 m/s Ambulance

What is the wavelength of the sound of the ambulance's siren if you are standing at the position of the car? The velocity of sound in air is 343 m/s.

Answer in units of m

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Physics

Emmett Valentine

When a chemical reaction occurs with only one substance, what happens to the atoms of that substance?

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Physics

Kendal

Total energy input is 1400 and my efficiency is 80% so what is the useful energy output in jules?

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Physics

Alden Vasquez

Which group of elements loses 1 electron easily?

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Physics

Adyson Mahoney

What evidence can you cite for the particle nature of light? 1. Refraction phenomenon of light 2. The many colors of light 3. Diffraction phenomenon of light

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Physics

Bud

As the moon revolves around the Earth, it also rotates on its axis. Why is it that the the same side of the moon is always visible from Earth?

a. The moon does not have a day and night cycle.

b. That side of the moon only faces away from Earth during the daytime.

c. The speed of the moon's rotation keeps the same side always facing Earth.

d. The Earth's gravity attracts one side of the moon more than the other.

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Physics

Willow Kirby

Why are microwaves beneficial to use for transmitting information

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Physics

Blevins

A 75 kg runner taking part in a 200 m dash must run around the end of a track that has a circular arc with a radius of curvature of 32 meters. if he completes the 200 m dash in 20.33 s and runs at constant speed throughout the race, what is the magnitude of his centripetal force as he runs the curved portion of the track?

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Physics

Kaeden Holmes

Thinking about the winter we missed out on this year. Calvin and his tiger go sledding down a snowy hill. There is friction between the snow and the sled, and there is air resistance. Looking at the entire time that they spend on the hill (from when they start from rest at the top of the hill until they reach the bottom moving fast), indicate whether each of the following quantities is positive, negative, or zero, by writing either, -, or 0 for the questions below. We take Calvin, the tiger, and the sled as our system.

a. The work done by the normal force that the snow exerts on the system?

b. The work is done by the frictional force that the snow exerts on the system?

c. The change in the kinetic energy of the system?

d. The change in the gravitational potential energy of the system?

e. The total work is done on the system?

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Physics

Kamila Vargas

what are the three types of solenoids, which one is the most common, and which one is used in pinball machines?

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Physics

Brodie Krause

A sound wave has a frequency of 741 hz in air a wavelength of 0.47m what is the temperature of the air as soon as the below city of sound at 0°C is 235 m/s

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