Questions
A 456 g oscillator has a speed of 98.0 cm/s when its displacement is 3.00 cm...

A 456 g oscillator has a speed of 98.0 cm/s when its displacement is 3.00 cm and 69.0 cm/s when its displacement is 5.30 cm.

What is the oscillator's maximum speed?

In: Physics

If you increase the potential difference or electromotive force across a resistance in a circuit the...

If you increase the potential difference or electromotive force across a resistance in a circuit the current flowing through that device will___.

Question 8 options:

increase.

decrease.

remain the same.

get scared and go home..

In a parallel circuit, if one bulb blows, the total current will ____________.

Question 12 options:

increase

decrease

remain the same

A 10 ohms, 22 ohms, and 100 ohms resistor are hooked in series. What is the total resistance?

Question 18 options:

132 volts

132 ohms

0.16 ohms

6.5 ohms

Three different size lights are running off a low voltage system.   The resistance of the three lights are R1 =3 ohms, R2 = 9 ohms, and R3 = 9 ohms. They are all connected in parallel with a 5.0 V battery. The internal resistance of the battery is negligible.

What is the current through R1?

Question 20 options:

1.67 A

0.24 A

9 A

2.78 A

In: Physics

A proton starts on a plate with potential of 5.0 x 10^3 V at y=0m. It...

A proton starts on a plate with potential of 5.0 x 10^3 V at y=0m. It then enters a region in which there is magnetic field of 2.0 T pointing out of the page. In a field it travels a semicircular path.

a) what is the radius of the semicircle

b)where (what value of y) doed the proton leave the magnetic field?

c) the proton now passes between a second set of plates with a potential difference of 5 x 10^3 V. What is its velocity after passing through these plates?

d) The proton now enters another region in which there is a magnetic field of 2.0 T pointing out of the page, and it again describes a semicircular path. What is the radius of the semicircle

e) where (what value of y) does the proton emerge from the field now?

In: Physics

In the figure below, the battery has potential difference V = 9.0 V, C2 = 3.0

In the figure below, the battery has potential difference V = 9.0 V, C2 = 3.0

In: Physics

What are some examples of physical science concepts that are used to solve problems? And discuss...

What are some examples of physical science concepts that are used to solve problems? And discuss the application of the concept.

In: Physics

You are a junior space cadet on an interstellar space station. Your job is to launch...

You are a junior space cadet on an interstellar space station. Your job is to launch a long distance spacecraft. The mass of the spacecraft without any fuel is 1217 kg. This mass is often called dry mass. The rocket engine of the craft can exhaust hot gas at a speed of 2.26 km/s relative to the space craft. How much rocket propellant does the craft need, if you want the craft to reach a final speed of 5.51 km/s relative to the station? In interstellar space the gravitational pull of the stars is negligible.

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A 60 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it...

A 60 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 27 m/s. If the player was moving upward with a speed of 4.0 m/s just before impact, what will be the speed of the ball immediately after the collision if the ball rebounds vertically upwards and the collision is elastic?
______m/s

If the ball is in contact with the player's head for 20 ms, what is the average acceleration of the ball? (Note that the force of gravity may be ignored during the brief collision time.)
________ m/s2

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A 6.10 m length of 2.4 mm -diameter wire carries a 770 mA current when 22.0...

A 6.10 m length of 2.4 mm -diameter wire carries a 770 mA current when 22.0 mV is applied to its ends. The drift velocity is 2.0×10−5 m/s .

A. Determine the resistance R of the wire.

Express your answer to three significant figures and include the appropriate units.

B. Determine the resistivity ρ.

Express your answer to two significant figures and include the appropriate units.

C.Determine the current density j.

Express your answer to two significant figures and include the appropriate units.

D. Determine the electric field inside the wire.

Express your answer to two significant figures and include the appropriate units

E. Determine the number n of free electrons per unit volume.

Express your answer using two significant figures.

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A particle with a charge of −2.80×10−8 C is moving with an instantaneous velocity of magnitude...

A particle with a charge of −2.80×10−8 C is moving with an instantaneous velocity of magnitude 42.5 km/s in the xy -plane at an angle of 52.0 o counterclockwise from the +x axis.

Part A What is the direction of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the -x direction?

Part B What is the magnitude of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the -x direction?

Part C What is the direction of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the +z direction? Please, enter your answer as a counterclockwise angle from the +y direction to the direction of the force.

Part D What is the magnitude of the force exerted on this particle by a magnetic field with magnitude 2.00 T in the +z direction?

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Divers get “the bends” when bubbles of N2 gas form in their bloodstream if they rise...

Divers get “the bends” when bubbles of N2 gas form in their bloodstream if they rise too rapidly from a deep dive. Calculate the solubility (mol L−1) of N2 in water (this is roughly equal to the solubility in blood serum) at sea level and at a depth of 300 ft below the surface of the ocean. It is given that: the density of seawater is 1.01 gcm−3, the density of mercury is 13.6 gcm−3 and the Henry’s constant of N2 is 86 × 103 atm.

Answer is 6.4 × 10−3molL−1 but idk how they got it

In: Physics

Write a creative story to tell about the journey of a jogger from one location in...

Write a creative story to tell about the journey of a jogger from one location in a park to another location. Make up some events and experiences that the jogger goes through on his/her journey. Tell what happens to the jogger throughout the journey (e.g., being chased by a dog or having to slow down for a parade, etc.) As you tell the story, use the terms speed, velocity and acceleration and explain how and why these values change for the jogger as he/she goes through different parts of his/her trip. Your story can be creative and funny or serious as long as you use the terms speed, velocity and acceleration. Make sure that the story conveys the meanings of these terms and the differences between them.

In: Physics

Point B is at < 8.9, 4.0, 14.4 > ft. A force vector of < 15,...

Point B is at < 8.9, 4.0, 14.4 > ft. A force vector of < 15, 37, 21 > pounds is applied at point B.

A) Determine the x-component of the torque of the force about the origin.
(include units with answer)

B) Determine the magnitude of the torque about the origin.
(include units with answer)

C) Point C is at <-3.7, -9.0, 8.1>ft. Determine the x-component of the torque of the force about the point C.
(include units with answer)

D) Determine the magnitude of the torque about the point C.
(include units with answer)

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A 1.85 kg block slides with a speed of 0.955 m/s on a frictionless horizontal surface...

A 1.85 kg block slides with a speed of 0.955 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 980 N/m . The block comes to rest after compressing the spring 4.15 cm.

A.Find the spring potential energy, U, the kinetic energy of the block, K, and the total mechanical energy of the system, E, for compressions of 0 cm.

B.Find the spring potential energy, U, the kinetic energy of the block, K, and the total mechanical energy of the system, E, for compressions of 1.00 cm.

C.Find the spring potential energy, U, the kinetic energy of the block, K, and the total mechanical energy of the system, E, for compressions of 2.00 cm.

D.Find the spring potential energy, U, the kinetic energy of the block, K, and the total mechanical energy of the system, E, for compressions of 3.00 cm.

E.Find the spring potential energy, U, the kinetic energy of the block, K, and the total mechanical energy of the system, E, for compressions of 4.00 cm.

In: Physics

A person is pulling a 40 kg block of ice across an icy surface at a...

A person is pulling a 40 kg block of ice across an icy surface at a 25 degree angle. If the person is pulling with a force of 42 N, what is the magnitude of the acceleration of the block of ice? you may ignore drag, but not friction. Us=.1 and Uk=.03

I got this wrong on the homework and my teacher said that the normal forces does not equal mg here and that the tension is "pulling up"

In: Physics

A merry-go-round with a moment of inertia of 750 kgm^2 and a radius of 2.55 m...

A merry-go-round with a moment of inertia of 750 kgm^2 and a radius of 2.55 m is rotating with an angular velocity of 9.42 rad/s clockwise (as viewed from above.) A child, whose weight is 334 N, runs at 2.76 m/s tangent to the rim of the merry-go-round and jumps onto it in the direction opposite of its sense of rotation. With what angular speed does the merry-go-round rotate after the child jumps onto its edge?

I'm pretty sure the answer is going to be negative.

In: Physics