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Jaxson Swanson
Physics
The term that describes the time when the sun's are directly over the equator is:
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Salas
Physics
A submarine can detect an approaching enemy submarine using sonar. If a stationary submerged submarine emits a 100kHz tone and receives a tone Doppler shifted by 200Hz, calculate the speed of the enemy submarine if the speed of sound in salt water is 1,482m/s. Note: Because the echo is off of a moving object, the moving object amplifies the Doppler effect by a factor of 2! Therefore, the speed must be cut in half. A. 1.0m/s B. 1.5m/s C. 2.2m/s OD. 3.3m/s E. 4.4m/s
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Dax Kent
Physics
The planet Krypton has a mass of 7.6 * 1023 kg and radius of 1.7 * 106 m. What is the acceleration of an object in free fall near the surface of Krypton? The gravitational constant is 6.6726 * 10-11 N · m2 / kg2. Answer in units of m/s 2.
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Vivian Yang
Physics
An input force of 50. newtons is applied through a distance of 10. meters to a machine with a mechanical advantage of 3. If the work output for the machine is 450 newton · meters and this work is applied through a distance of 3 meters, what is the output force of the machine?
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Petie
Physics
Ask Your Teacher In a choir practice room, two parallel walls are 4.00 m apart. The singers stand against the north wall. The organist faces the south wall, sitting 0.680 m away from it. To enable her to see the choir, a flat mirror 0.600 m wide is mounted on the south wall, straight in front of her. What width of the north wall can the organist see
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Jackson Forbes
Physics
What Could be the control in an experiment to measure the effects of gas additives on fuel
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Zaid Campos
Physics
Two or more atoms can be held together through shared
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Colton Alexander
Physics
What happens to wavelength as a wave leaves the air and enters the Perspex?
a. It decreases
c. It stays the same
b. It increases
d. It becomes irregular
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Armani Osborn
Physics
Which of the following statements are correct? 1. Electrons and protons have identical masses but opposite charges. 2. Most of an atom's mass is concentrated in a small, positively charged, nucleus. 3. Atoms have equal numbers of protons and neutrons. a 1 only b 2 only c 3 only d 1 and 2 only
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Elianna Gardner
Physics
What are some changes that can be caused by sound energy?
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Rayna Howell
Physics
A cheetah can run at 30 m/s, but only for about 12s. How far will it run in that time
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Ryder
Physics
A car is traveling 80 km/h if the car's speed remains constant how far will it have traveled in 3 hours
a. 3km
b. 26.7km
c. 80 km
d. 240 km
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Jazmine Knapp
Physics
True or False? Gases such as water vapor condense when they are * heated*.
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Skyler Bauer
Physics
If a chromosome on unfolds itself how is transcription enhanced
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Myles Bates
Physics
Two friends, barbara and neil, are out rollerblading. with respect to the ground, barbara is skating due south at a speed of 5.9 m/s. neil is in front of her. with respect to the ground, neil is skating due west at a speed of 1.4 m/s. find neil's velocity (a) magnitude and (b) direction relative to due west, as seen by barbara.
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