12,795 Answered Questions for the topic physics

Physics

09/25/22

What is the brain's acceleration, and the "g-force" (the unitless number of 𝑔g's of acceleration, where 𝑔g is given on the formula sheet) of the woodpecker's brain?
This question is a continuation from the previous question.A woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree,... more
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Physics

09/25/22

What is the stopping time of the skull?
A woodpecker's brain is specially protected from large decelerations by tendon-like attachments inside the skull. While pecking on a tree, the woodpecker's skull comes to a stop from an initial... more
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Physics

09/24/22

max height of object above the surface
SpaceX plans to transport humans to Mars, but experienced a few rocket failures while on initial tests. So suppose the rocket to Mars (without people on board - another test flight) liftoffs from... more
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Physics

09/24/22

Find where one object surpasses another.
You are standing on top of a 219 m tall building. A drone operated by your friend is headed straight down, at a speed of 28.0 m/s. Just as the drone passes you, you release a tennis ball off the... more
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09/24/22

Help needed with physics problem
A 2.5-cm-diameter parallel-plate capacitor has a 2.1 mm spacing. The electric field strength inside the capacitor is 1.0×10^5 V/m .How much charge is on each plate?My answers were: 6.0*10^-8... more
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Physics

09/24/22

A Vector P of magnitude 3.0 N acts towards the right and a vector Q of magnitude 4.0 N acts upwards. What is the magnitude and direction of the vector (P - Q)?
Please show your process.
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Physics

09/22/22

AP Physics Question
A boy throws a stone straight upward with an initial speed of 15 m/s. What maximum height will the stone reach before falling back down?
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Physics

09/22/22

Physics vector question
Add the following four vectors together using the computer method. Don't forget to include magnitude, units, and direction on your final answer.Vector A: 6 m, 30 degrees ... more
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Physics

09/22/22

Two boxes on inclined plane fastened to wall
Two blocks are connected by a massless string and are held in position by another massless string along a frictionless incline (as shown in the figure). Let M1 = 4.30 kg, M2 = 2.70 kg, and θθ =... more
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Physics

09/21/22

please help me with this physics question
A stunt woman of mass 50.0 kg can run at a top speed of 19.2 mph. A film requires that she run and jump off a cliff that sits 13.3 m above the surface of a lake. However, she must clear a shelf of... more
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Physics

09/20/22

Physics Question
The velocity of the transverse waves produced by an earthquake is 4.35 km/s, while that of the longitudinal waves is 4.13 km/s. A seismograph records the arrival of the transverse waves 64.72 s... more
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Physics

09/20/22

AP Physics: A sports car moving at constant velocity travels 120 m in 5.0 s. It then brakes and comes to a stop in 4.0 s. Questions in description
a. How fast is the far moving during the first 5 s?b. What is the magnitude of the acceleration of the car as it brakes and comes to a stop?
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09/20/22

Refraction in a prism
I'm having problems with this optics problem:Glass prism ABC with refractive index n1 = 1.6, vertex A angle α = 40° and vertex B angle β = 60°,placed in a container with two different liquids... more
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09/20/22

Kirchoff's laws and electrical circuit
Two batteries with emf ε1 = 10 V and emf ε2 = 20 V and internal resistances r1 = 1 Ω and r2 = 2 Ω, respectively, are connected in parallel, and then connected in parallel to a resistor of R = 30 Ω... more
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09/20/22

Melting ice cubes
Two identical ice cubes are placed in two large containers, one containing tap water and the other containing a strong saline solution. Both liquids are of equal volume and at the same room... more
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Physics

09/19/22

If jack was traveling at 100 miles in 2 hours what was his speed in miles per minute

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Physics

09/19/22

A Box with Friction
A rope is pulling horizontally to the right on a box of weight 32.0 N which is sliding across the floor at a constant speed. The coefficient of kinetic friction between the floor and the box is... more
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Physics

09/19/22

Nick travels 2.50km north followed by 4.30km south and then 1.40km north
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09/19/22

Weight and Mass Conversion with Constant Acceleration
Hello, I'm having some issues with these homework questions and would appreciate a walkthrough of what kind of equation I'm supposed to use. Thank you in advance!"An astronaut weighs 658 N on... more
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Physics

09/19/22

A car traveling at 10 m/s starts to negatively accelerate steadily. It comes to a complete stop in 20 seconds. What is its acceleration?
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Physics

09/18/22

Physics Problem. Determine coefficient of static friction and acceleration.

Suppose m1 = 5.2 kg and m2 = 2.8 kg. Assume the pulley is massless and frictionless. A) What coefficient of static friction between the 85.0 N block and the table ensures static equilibrium? B)... more
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09/18/22

stuck on math question
The surface x^2 + y^2 = 7 is a circular cylinder.What is an equation for the cross section at y = −7 using x and z.What is an equation for the cross section at y = 0 using x and z.What is an... more
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09/18/22

help needed w/ math question
A pair of parametric equations is given below.x = 4 sin(t),  y = 4 cos(t), 0 ≤ t ≤ 𝜋Find a rectangular-coordinate equation for the curve by eliminating the parameter.My answer is y=sqrt... more
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Physics

09/17/22

Can you help me with this problem??
At the half way mark of a 200 meter race the lead runner is running at a uniform speed of 10.3 m/s. The contestant in the second position is running at a speed of 10.1 m/s is 2 meter behind the... more
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Physics

09/17/22

Can you help me with this question??
In a road with speed limit of 30 miles per hour, how much time (in minutes) will you gain by driving at an average speed of 5 miles per hour over the speed limit if it would take 30 minutes to... more
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