12,762 Answered Questions for the topic physics

Physics

12/16/24

This is a circular motion and gravity question
Lets assume we have an imaginary system with a Sun that has a mass of 50 million kilograms, and a planet orbiting 20 meters away from this tiny sun with a mass of 1 million kilograms. Calculate the... more
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Physics

12/16/24

Lets say you are somewhere near Saturn. How far away from the core would you need to be for your weight to be 100,000N? Do not enter your answer in scientific notation.
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Physics

12/16/24

Lets assume you have a mass of 50kg. What would be your weight on Saturn if your mass in kg is 5.68*10^26, and a radius of 5.85*10^7
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Physics

12/12/24

Sun that has a mass of 50 million kilograms and a planet orbiting 20 meters away from the sun with a mass of 1 million kilograms Calculate the period of the planets revolution around its sun in hours
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Physics

12/12/24

Lets say there is a giant stone block next to a 2000kg tree. If they are 81cm apart, and have a gravitational force of 0.0001N, what is the mass of the block?
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Physics

12/12/24

What is the force of attraction a 50kg man and their 20kg dog if they are 1mm away from each other? Go to 5 decimals.
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Physics Astronomy

12/11/24

How do I find the orbital angular momentum of one star in a binary star system?
As a hobby, I've been trying to study binary stars on a physics level, and I'm pretty confused as to how to approach problems since I've never really done this sort of math before. I'm using this... more
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12/10/24

What is the difference between speed and velocity.
Speed only measures how fast an object is moving regardless of its direction.Example: We can say a boat is moving with an average speed of 50 miles/hr.Because speed only cares about the magnitude... more
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Physics

12/06/24

while sitting in a moving bus you throw an apple up into the air the apple will land back in your hand?
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Physics

12/05/24

Physics Question, Ive tried so many times PLEASE HELP
No matter what I try, I cannot get this question right,Use the Bohr model to estimate the energy (in eV) of the Kβ line in the X-ray spectrum of platinum (Z=78). (h=6.626×10-34 J.s, c=3×108 m/s,... more
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Physics

11/28/24

Physics 1 ch 13
The clarinet is a well-modeled cylindrical pipe that is open at one end and closed at the other. For a clarinet's whose air column has an effective length f 0.387 m, determine the wavelength Ym=3... more
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Physics

11/22/24

I keep getting this one question wrong on my homework and I can’t see why

The wavelength of the laser beam used in a compact disc player is 663 nm. Suppose that a diffraction grating produces first-order tracking beams that are 1.18 mm apart at a distance of 3.46 mm from... more
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Physics Math

11/19/24

Rotational Statics
A gymnast with mass mg = 43.0 kg stands on an improvised balance beam that sits on, but is not attached to, two supports. The beam has a mass mb = 113 kg and length L = 5.00 m. Each support is 1/3... more
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Physics

11/18/24

Physics Homework
The temperature of an oven is kept constant at 905.0 K. A hole with a diameter of 27.0 mm is drilled in the wall of the oven. How much power is emitted by this hole? Hint: consider the hole as a... more
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Physics Astronomy

11/14/24

Plotting a H-R diagram
When plotting a H-R diagram, I know that the temperature is plotted against luminosity and for a color-magnitude diagram, the absolute magnitude is potted against the color. What is the difference... more
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Physics

11/12/24

Physics, kinematics, free fall motion
I'm confused about the role of the minus sign in gravitational acceleration calculations.g (9.8 m/s²) is always positive because it represents the magnitude of gravity and magnitude can never be... more
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Physics

11/11/24

a roller coaster rider is travelling in a straight line changes from a speed of 4 m/s to 16 m/s in 3 s. Calculate the acceleration of the ride
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Physics Astronomy

11/11/24

How do I calculate luminosity?
If given the distance and the apparent magnitude of a star, I can calculate the absolute magnitude. Is it possible to convert this absolute magnitude into a luminosity? If so, how?
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Physics

11/11/24

Physics word problem
Indirect Cooling With Liquid Nitrogen. You are designing a system to cool an insulated silver plate of dimensions 2.00 cm × 2.00 cm x0.45 cm. One end of a thermally insulated copper wire (diameter... more
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Physics

11/03/24

Physics1 question
A uniform disk radius 0.521 m and an unknown mass is constrained to rotate about a perpendicular axis through its center. A ring with the same mass as the disk's rim. A tangential force of 0.225N... more
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Physics

11/01/24

Physics Rotational Motion
A 80 kg person is standing on a rotating platform at a distance of 5 meters from the center. The static friction coefficient is 0.45. Find the maximum tangential speed (in m/s) of the person so... more
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10/30/24

Find voltage and power given current and resistance.
Circuit with two batteries, each with internal resistance, that are connected in series with each other and a resistor R. Battery 1 has emf of 6 V and r_1 of 1.3 ohms. Battery 2 (connected in the... more
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Physics

10/29/24

A 7.0-Ω resistor is connected across the terminals of a battery having an internal emf of 10 V. If 0.50-A current flows, what is the internal resistance of the battery?
A 7.0-Ω resistor is connected across the terminals of a battery having an internal emf of 10 V. If 0.50-A current flows, what is the internal resistance of the battery?A) 13 ΩB) 20 ΩC) 10.8 ΩD) 27.0 Ω more
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Physics

10/29/24

When unequal resistors are connected in series across an ideal battery which statement is true.
2. When unequal resistors are connected in series across an ideal battery, A) the same power is dissipated in each one. B) the potential difference across each is the same. C) the current flowing... more
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Physics

10/29/24

An Ideal Ammeter Should Be:
1. An ideal ammeter shouldA) have a high coil resistance.B) introduce a very small series resistance into the circuit whose current is to be measured.C) introduce a very large series resistance... more
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