12,727 Answered Questions for the topic physics

Physics

11/14/22

Thermodynamics question

1. 1 kg of air initially at 1 bar and 40°C is compressed adiabatically until its pressure is 50 bar. The air then receives 125.6 kJ of heat at constant pressure. Find for each process, the... more
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Physics

11/14/22

how do you solve this? with what formula?
an astronaut has landed on a known planet. She drops a wrench from a height of 8.04 meters above the surface. The wrench takes 5.50 seconds to fall to the surface. What is the acceleration of... more
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11/13/22

how does torque relate to rocking chair?
how does torque relate to rocking chair?
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Physics Math Science

11/12/22

How to get angular momentum?
In this experiment, a disk was dropped on a rotary motion sensor. Disk 1 has a Moment of Intertia (Ia) at 3996x10-8 . Another was dropped that has a Moment of Inertia (Ib) of 1064x10-6 . The... more
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Physics

11/12/22

Please help me!
A police car sounding a siren with a frequency of 1280 Hz is traveling at 110.0 km/hr. (Express your answer using 4 significant figures.) a) What frequency does an observer standing next to the... more
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Physics

11/12/22

Please help me!
You are building a pipe organ with open-tube pipes spanning the range of human hearing (20. Hz to 20. kHz), a) What would be the length of the shortest pipe? b) What would be the length of the... more
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Physics

11/12/22

Please solve this physics problems
A mass m = 12 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4591 N/m. The floor is frictionless except for a rough patch. For this rough path, the... more
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Physics

11/12/22

Please solve this physics problems
A mass m1 = 4.6 kg rests on a frictionless table and connected by a massless string to another mass m2 = 5 kg. A force of magnitude F = 43 N pulls m1 to the left a distance d = 0.85 m.1)How much... more
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Physics

11/12/22

Please solve this physics porblems
A mass m1 = 5.6 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 3 kg which hangs freely from the string. When released, the hanging... more
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Physics Math Science

11/12/22

What is the current in a circuit?
Cons‎i‎der an LC circ‎uit with L = 50.0 [mH] and C = 5.00 [μF]. The ma‎ximum c‎rrent in t‎he induc‎tor is 0.60 [A]. What is the cu‎rr‎ent in the c‎ir‎cuit if the ca‎p‎acitor carri‎es a t‎‎hird of... more
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Physics Math Science

11/12/22

what is the resulting mutual inductance
Consider an ideal solenoid X that carries a current 2I. Another solenoid is wrapped around solenoid X resulting to a mutual inductance of 2M . If the current in X is halved, what is the resulting... more
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Physics Math Science

11/12/22

Force experienced in an electric field
S‎up‎pose we ha‎ve a ka‎ngaroo with cha‎rge q and vel‎ocity v-> =v(i^+j^). The ka‎ngaroo is immer‎sed in an ele‎ctric f‎ield E-> =Ej^ and ma‎gnetic‎ fie‎ld B-> =Bj^. W‎hat is the f‎orce... more
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Physics Science

11/12/22

How strong must the magnetic field
A be‎am of ele‎ctrons (of charge qe and mass me) is s‎hot into a reg‎ion of unif‎orm magn‎etic fi‎eld with a spee‎d of 513[m/s]. Th‎ey exit the re‎gion o‎f uni‎form magn‎etic fi‎eld op‎posite the... more
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Physics

11/11/22

i really need help please.. The focal length of a diverging lens is negative. If f = −23 cm for a particular divergin
The focal length of a diverging lens is negative. If f = −23 cm for a particular diverging lens, where will the image be formed of an object located 59 cm to the left of the lens on the optical... more
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Physics

11/11/22

Physics Forces Question

A 15kg cart is being pushed with a horizontal force of 120 N. If the cart starts at rest, can you help me find how fast is the cart moving after 4.0 seconds?
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Physics

11/11/22

Kinetic Friction Question

A box of books that weighs 325N moves with a constant velocity across the floor when it is pushed with a force of 425N exerted downward at an angle of 35.2 below the horizontal. Can you help me... more
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Physics

11/10/22

Free fall and gravity

A falling object accelerates from -10.0 m/s to -30.0 m/s. How much time does that take? a=-9.80 m/s^2
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Physics

11/10/22

A hiker makes four straight-line walks A 32 km at 140 ◦ B 27 km at 291 ◦ C 12 km at 55 ◦ D 18 km at 302 ◦
How far from the starting point is the hiker after these four legs of the hike? All angles are measured in a counter-clockwise direction from the positive x-axis. Answer in units of km.
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Physics

11/10/22

How far can he throw the same ball vertically upward with the same initial speed? Answer in units of m.
A man can throw a ball a maximum horizontal distance of 101 m. The acceleration of gravity is 9.8 m/s 2 .
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Physics

11/10/22

What initial horizontal velocity v will be required to barely clear the edge of the shelf below you? How far from the bottom of the second cliff will the projectile land?
You are standing at the top of a cliff that has a stairstep configuration. There is a vertical drop of 3 m at your feet, then a horizontal shelf of 6 m , then another drop of 7 m to the bottom of... more
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Physics

11/10/22

How to calculate the heat gained by the calorimeter
How to calculate the heat gained by the calorimeter, given, initial mass of calorimeter=40.32g, initial temp° = 31°c, temp° of hot water= 62°c, final temp° after mixture =54°c, final mass= 94.62g,... more
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Physics

11/09/22

Please help me!
A person standing a certain distance from an airplane with four equally noisy jet engines is experiencing a sound level of 132 dB.  What sound level would this person experience if the captain... more
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Physics

11/09/22

high school physics

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.A missile is fired from a jet flying horizontally at Mach 2 (2200 ft/s). The missile has a... more
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Physics

11/09/22

calculate the horizontal force needed to make a 3.8 kg baseball accelerate at a 641m/s^2
this problem is from a worksheet and need help solving itanswer the problem using one of this equations (F=ma) and (W=mg)
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Physics

11/08/22

A 10.5 kg board 6.00 m long is supported by two sawhorses, one at each end. A 4.45 kg saw sits on the board 1.80 m from the left end. Find the upward force that the LEFT sawhorse exerts on the board.
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