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Physics
Physics
High School
given the force field f, find the work required to move an object on the given orientated curve. on the parabola from to
Physics
High School
what is the magnitude of the acceleration of a skydiver at the instant she is falling at one-half her terminal speed?
Physics
High School
for an electromagnetic wave moving through vacuum, what is the ratio of the magnitude of the electric field to the magnetic field equal to?
Physics
High School
a 2.00 kg metal object requires 1.00*104 j of heat to raise its temperature from 20.0c to 40.0c what is the specific heat capacity of the metal
Physics
High School
a ball is thrown from point x and follows path xyz. air resistance is negligible. which quantity is zero when the ball is at the highest point y of the path?
Physics
College
A 1.60 kg, horizontal, uniform tray is attached to a vertical ideal spring of force constant 195 N/m and a 280 g metal ball is in the tray. The spring is below the tray, so it can oscillate up-and-down. The tray is then pushed down 15.0 cm below its equilibrium point (call this point A) and released from rest. a) How high above point A will the tray be when the metal ball leaves the tray? (Hint: This does not occur when the ball and tray reach their maximum speeds.) b) How much time elapses between releasing the system at point A and the ball leaving the tray? c) How fast is the ball moving just as it leaves the tray?
Physics
High School
In what ways is the wireless signal between the cell phones similar to the light that travels from the cell phone to your eyes?.
Physics
College
Which of the following statement describes the coriolis effect? Coriolis effect causes the air moving into a low pressure system to bend to the left in the northern hemisphere Coriolis effect causes the air moving out of a high pressure system to bend to the left in the northern hemisphere. Coriolis effect causes the air moving into a low pressure system to bend to the right in the southern hemisphere. Coriolis effect causes the air moving out of a high pressure system to bend to the left in the southern hemisphere. All of the above
Physics
High School
During most of its lifetime, a star maintains an equilibrium size in which the inward force of gravity on each atom is balanced by an outward pressure force due to the heat of the nuclear reactions in the core. but after all the hydrogen fuel is consumed by nuclear fusion, the pressure force drops and the star undergoes a gravitational collapse until it becomes a neutron star. in a neutron star, the electrons and protons of the atoms are squeezed together by gravity until they fuse into neutrons. neutron stars spin very rapidly and emit intense pulses of radio and light waves, one pulse per rotation. these pulsing stars were discovered in the 1960s and are called pulsars.A star with the mass (M=2.010^30kg) and size (R=3.510^8m) of our sun rotates once every 35.0 days. After undergoing gravitational collapse, the star forms a pulsar that is observed by astronomers to emit radio pulses every 0.200 s. By treating the neutron star as a solid sphere, deduce its radius.
Physics
High School
An element of atomic number 88 decays radioactively to anelement of atomic number 82.Which of the following emissions achieve this result?a.one alpha particle and one beta particleb. three alpha particlesc. one alpha particled. six beta particles
Physics
High School
a 4.50-v battery is connected across the primary coil of a transformer having 20 turns. if the secondary coil of the transformer has 40 turns, what voltage appears across the secondary?
Physics
High School
a 0.10 kg mass is attached to a string 0.75 m long and swings in a horizontal circle, revolving once every 0.80 s.how much tension is in the string?
Physics
High School
An object has a mass of 100 kg moving at 5 m/s. What is the linear momentum of the object?.
Physics
College
A 2.4 10-6 C charge experiences a 1.7 10-2 N force from a -4.1 10-6 C charge. What is the distance separating these two charges? A. 5.7 10-10 m B. 2.3 m C. 5.2 m D. 2.4 10-5 m
Physics
High School
How do you solve for dilation?
Physics
High School
Unpolarized light of intensity I0 is incident on three polarizing filters. The axis of the first is vertical, that of the second is 35.0 from vertical, and that of the third is horizontal.
Physics
High School
Suppose that the coefficient of kinetic friction between zak's feet and the floor, while wearing socks, is 0. 250. Knowing this, zak decides to get a running start and then slide across the floor.
Physics
High School
3.)slight misalignment between the rotor field and the stator field in a synchronous motor is called the
Physics
High School
in the activator stage of physical activity you are active but participate inconsistently.
Physics
College
Which of the following quantities is conserved for plant orbiting a star in a circular orbit? Only the planet itself is to be taken as the system the star is not included a. Momentum and energy b. Energy and angular momentum c. Momentum, angular momentum and energy d. None of the above.
Physics
High School
Light waves are electromagnetic waves that travel at 3.00 x 10^8 m/s. the eye is most sensitive to light having a wavelength of 5.50 x10^-7 m.(a) Find the frequency of this light wave. (b) Find its period.
Physics
High School
light of wavelength 3.19 mm strikes and is absorbed by a molecule. is this process most likely to alter the rotational, vibrational, or atomic energy levels of the molecule?
Physics
High School
push a cart along a track so twice as much net force acts upon it. if the acceleration remains the same, what is a reasonable explanation?
Physics
High School
an electon in a box absorbs light. the longest wavelength in the absorbtion spectrum is 500 nmnm . how long is the box? for general problem-solving tips and strategies for this topic, you may want to view a video tutor solution of spectrum of dye.
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