12,762 Answered Questions for the topic physics

Physics

06/23/23

A man drives a car a distance of 20km at an average speed of 44kmhr^-1. what must be his average speed for the next 220km if he is to cover the total distance in 9hours?
To get the average speed i had to first get the T1( as totaltime= T1 + T2)....do i have to add the average speed(V1 + V2?)
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Physics Linear Algebra

06/22/23

Special Relativity Question
Given 2 events, A and B, given in space-time coordinates ( ct, x ) as the following:A: ( ct, x ) = ( 2, 3 )B: ( ct, x ) = ( 3, 5 )a) Find the fraction of the speed of light, β, that will cause the... more
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Physics

06/22/23

help with this friction question, please go to the link
https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.htmlWhat is the friction force on the box when a 50 N force is applied? f = N 11. What is the... more
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Physics

06/22/23

You are standing on a bathroom scale inside an elevator. The elevator slows down while moving.
What is true about the scale reading compared to your actual weight?A) The scale reading is the same as your actual weight.B) The scale reading is greater than your actual weight.C) The scale... more
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Physics

06/22/23

Under which of the following conditions is Newton's 2nd Law the same as Newton's 1st Law?
A) When the object is speeding upB) When the object is slowing downC) When the object has a constant speedD) None of the above
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Physics

06/21/23

What is missing from the Standard Model that the Higgs Field provides for?
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Physics

06/19/23

physics horizontal and vertical velocity question
An artillery shell is launched on a flat, horizontal field at an angle of α = 32.8° with respect to the horizontal and with an initial speed of v0 = 224 m/s. What is the horizontal velocity of the... more
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Physics

06/17/23

physics problem
When a plane flies in a circular curve, its wings are tipped (see diagram) so that the "lift" force, which is exerted perpendicularly to the bottom of the wings, has a component towards the center... more
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Physics

06/17/23

What is its acceleration with a proper sign? Keep 3 digits after the decimal point.
At t1 = 5.0s an object's velocity is v1 = 8.790m/s to the EAST, and at t2 = 11.0s its velocity is v2 = 17.730 m/s to the WEST. Assuming a constant accelerationTake EAST as the positive direction. 
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Physics

06/17/23

What is its displacement (in meters) from t1 to t2? Keep 3 digits after the decimal point.
At t1 = 5.0s an object's velocity is v1 = 8.790m/s, and at t2 = 11.0s its velocity is v2 = 17.730m/s. Assuming a constant acceleration.
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Physics

06/17/23

What is its displacement (in meters) from the initial moment to t = 7.50s?
An object's initial velocity is 1.34m/s in the +x direction. It slows down with a constant acceleration whose magnitude is 1.49m/s^2. After it reaches a momentary stop it reverses its direction of... more
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Physics

06/17/23

An object's initial velocity is 1.34 m/s and it speeds up with a constant acceleration whose magnitude is 1.49 m/s^2. What is its velocity after a displacement of 15.0 m?
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Physics

06/17/23

An object's initial velocity is 1.34 m/s and it speeds up with a constant acceleration whose magnitude is 1.49 m/s2. What is its displacement (in meters) from the initial moment to t = 7.50s?

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Physics

06/16/23

How long does it take Ilya to cover the distance? Now find Ilya's average speed. Express Ilya's average speed numerically, in miles per hour.
Ilya and Anya each can run at a speed of 8.30 mph and walk at a speed of 3.20 mph. They set off together on a route of length 5.00 miles. Anya walks half of the distance and runs the other... more
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Physics

06/16/23

What average speed of the rest of the trip is needed if the car's overall average speed of the entire trip is 55.10 mph? Keep two digits after the decimal point.
A car is making a trip in a total time of 98 min. During the first 34 min, its average speed is  24.5 mph.
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Physics

06/15/23

physics question
One of the fundamental subatomic particles is the electron. It has a negative charge and a mass of 9.11  10-31 kg. A certain electron has a speed of 4.00  105 m/s initially. Its speed increases... more
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Physics

06/15/23

How much power must a motor deliver to lift the elevator and its passengers at a constant speed of 3 m/s?, b) What power must the motor deliver at the ..........
An elevator car has a mass of 1600kg and is carrying passengers with a combined mass of 200kg. A constant friction force of 4000N retards its motion. a) How much power must a motor deliver to lift... more
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Physics

06/15/23

What average power does the sprinter generate during the 1.6 sec interval?
Starting a race, a 68.2 kg sprinter runs the first 7.04m in 1.6 sec. starting from rest and accelerating uniformly. What average power does the sprinter generate during the 1.6 sec interval?
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Physics

06/15/23

Find the power of the motor assuming no friction losses?
An elevator with a 10 person capacity (each person with an average mass of 68kg) raises passengers to a height of 152m in 55 sec at a constant speed.
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Physics

06/15/23

Thermal expansion copper
In mechanical engineering, various components are often connected with thermal expansion/shrinkage. For this task, for example, a copper ring was pressed onto a steel rod so that the ring has... more
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Physics

06/15/23

Viscosity of a liquid
The viscosity of a liquid can also be determined using a so-called capillary viscometer. For this the volume flow ∆V/∆t is measured through a tube with a radius of r = 0.5 mm and a length of s =... more
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Physics

06/15/23

You drop a ball from rest while your friend throws a second identical ball horizontally from the same height as you. Neglecting air resistance, which ball hits the ground first
A. The ball thrown horizontally hits firstB. They both hit at the same timeC. The dropped ball hit firstD. Cannot be determined
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Physics

06/15/23

A cannonball gets shot out of a cannon. Neglecting air resistance, what is the direction of the acceleration when the cannonball is in the air?
A. The acceleration is pointing in the direction of the cannonball's motion.B. The acceleration is pointing up.C. There is no acceleration on the cannonball when it is in the air.D. The... more
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Physics

06/15/23

If a cyclist is riding around a curve at constant speed, is he accelerating? If so, what is the direction of his acceleration?
A. Yes, he is accelerating in the direction opposite of his motionB. Yes, he is accelerating in the direction of his motionC. Yes, he is accelerating towards the outside of the curveD. Yes, he is... more
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06/14/23

The revenue R from the sale of x cameras is given by R=68x−x2. The cost C of producing x cameras is given by C=90+49x. How many cameras must be produced and sold in order to break even?

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