12,762 Answered Questions for the topic physics

Physics

02/22/23

Loop Physics Question

A small block of mass m = 1.50 kg slides, without frictionalong the loop-the-loop track shown. The block starts fromthe point P a distance h = 55.0 m above the bottom of theloop of radius R = 20.0... more
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Physics

02/21/23

A steam iron draws 5.5 A when connected to a potential difference of 120 V.
(a) What is the power rating of this iron? (b) How many joules of energy are produced in 20.0 min? (c) How much does it cost to run the iron for 20.0 min at $0.020/kW·h?
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Physics

02/21/23

How much power is needed to operate a radio that draws 9.0 A of current when a potential difference of 120 V is applied across it?
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Physics

02/21/23

The operating potential difference of a light bulb is 120 V. The power rating of the bulb is 75 W. Find the current in the bulb and the bulb's resistance.
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Physics

02/21/23

A potential difference of 9.0 V produces a current of 0.75 A in a piece of copper wire. What is the resistance of the wire?
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Physics

02/21/23

How much current is drawn by a television with a resistance of 45 that is connected across a potential difference of 120 V?
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Physics

02/21/23

Calculate momentum

Two 2.0Kg bodies, A and B collide. The velocities before the collision are ܸ஺ ሬሬሬ⃗ = 15݅ + 30݆ and ܸ஻ ሬሬሬሬ⃗ = −10݅ + 5.0݆. After the collision, ܸ஺ ሬሬሬ⃗ = −5.0݆ + 20݆. All speeds are given in... more
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Physics

02/21/23

A 5.410 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is 𝜇s=0.455 and the coefficient of kinetic friction is 𝜇k=0.205. At time 𝑡=0, a For
A 5.410 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is 𝜇s=0.455 and the coefficient of kinetic friction is 𝜇k=0.205. At time 𝑡=0, a... more
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Physics

02/21/23

Collisions (physics)
A 1905-kg railway freight car coasts at 4.8 m/s underneath a grain terminal, which dumps grain directly down into the freight car. If the speed of the loaded freight car must not go below 2.6 m/s,... more
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Physics

02/20/23

Jasmien Brown hfyf7ug
Provide an appropriate response. Use the Standard Normal Table to find the probability.The distribution of cholesterol levels in teenage boys is approximately normal with μ=170 and σ=30 ​(Source:... more
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Physics

02/20/23

Velocity and Speed
Alex Morgan kicks a soccer ball with a initial velocity of 20 m/s at an angle of 30 degrees. Assume the ball starts on the ground and lands on the ground.a) what is the initial vertical velocity of... more
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Physics

02/16/23

velocity and speed
Some people claim that it is impossible to throw Ricky Henderson out when he is stealing second. He can run from first to second base in 2.9s. The best catcher in baseball can throw the ball from... more
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Physics

02/16/23

Magnitude and Displacement
A football player runs 12m North and 4m Easta) what is the overall magnitude of the displacement of the football player?b) what is the direction of the overall displacement of the football player?... more
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Physics

02/16/23

What change to the report’s data would give a correct verification of momentum conservation?
The following report for a collision of two marbles has an error. Marble 1 has a mass of 3 g and an initial speed of 6 m/s right. After the collision it has a final speed of 4 m/s to the right.... more
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Physics

02/16/23

A character in a game has an initial velocity of 20.0 m/s at 15.0°. At this point, the character is 25.0 m (horizontally) from the landing platform and the character is 5.00 m high in the air.
A character in a game has an initial velocity of 20.0 m/s at 15.0°. At this point, the character is 25.0 m(horizontally) from the landing platform and the character is 5.00 m high in the air. Does... more
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Physics

02/16/23

Box Friction Problem help ASAP!
A box (m = 10.00 kg) is on a ramp with an incline of 30.0°. The ramp has a coefficient of static friction of 0.6 and a coefficient of kinetic friction of 0.2. Does the box slide down the ramp? If... more
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Physics

02/16/23

Marble Velocity help URGENT!
A student determines that the y - component of the acceleration of a marble being pushed by an unknown force is a y (t) = - 3t , where +y is the upward direction . The marble starts at a height of... more
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Physics

02/16/23

Elevator normal force help ASAP!
A box (m1 = 1.0 kg) is in an elevator which is accelerating upward at 3.00 m/s^2. The elevator has a mass of m 2 = 2000 kg. Find the normal force on the box from the elevator.a) Draw a Free Body... more
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Physics

02/16/23

A 8,200-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move with speed 2 m/s.
An 8,200-kg truck runs into the rear of a 1,000-kg car that was stationary. The truck and car are locked together after the collision and move at a speed 2 m/s. Compute how much kinetic energy was... more
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Physics Calculus

02/16/23

Resonant Frequency of an Equation with Period
Prove that C = - (1/((D^2) * L)) has Period T = 2pi sqrt(LC). What is the resonant frequency?
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Physics

02/15/23

motion of physics
As a baseball is being caught, its speed goes from 20.0 to 0 m/s in about 0.00750 s. Its mass is 0.185 kg.(a) What is the baseball's acceleration (Mind the sign!)?As a baseball is being caught,... more
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Physics

02/15/23

motion of physics
A motorcycle and the rider have a combined mass of 300.0 kg. The rider applies the brakes, causing the motorcycle to accelerate at -5.00 m/s^2. What is the magnitude of the net force on the... more
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Physics Math

02/15/23

A small asteroid that has a mass of 100 kg is moving at 200 m/s when it is 1000 km above the surface of the Moon.

A small asteroid that has a mass of 100 kg is moving at 200 m/s when it is 1000 km above the surface of the Moon. a. How fast will the meteorite be traveling when it impacts the lunar surface if it... more
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Physics

02/14/23

What would correspond to the current, I?
the rate at which cars pass a given point the street     cars traffic signals
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Physics

02/14/23

In an analogy between traffic flow and electric current, what would correspond to the charge, Q?
traffic signals the street     cars the rate at which cars pass a given point
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