12,762 Answered Questions for the topic physics

Physics

02/13/23

Work and Energy Question
 An archery bow is drawn a distance d = 0.49 m and loaded with an arrow of mass m = 0.071 kg. The bow acts as a spring with a spring constant of k = 167 N/m, and the arrow flies with negligible air... more
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02/13/23

(a) What is the radius of said orbit? (b) What parameters are conserved throughout the orbit? Calculate one of them
A satellite is inserted into a circular Earth orbit with period = 8 hours. Answer to part a) r = 20,307 kmAnswer to part b) specific energy = -9.8142 km^2/s^2 & specific angular momentum = 89,... more
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Physics Math Science

02/13/23

Where will this image be located?
The equation connecting s, p, and f for a simple lens can be employed for spherical mirrors, too. A concave mirror with a focal length of 6 cm forms an image of a small object placed 11 cm in front... more
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Physics Math Science

02/13/23

A camera is equipped with a lens with a focal length of 31 cm. When an object 1.9 m (190 cm) away is being photographed, what is the magnification?
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Physics Math Science

02/13/23

A camera is equipped with a lens with a focal length of 21 cm. When an object 1.7 m (170 cm) away is being photographed, how far from the film should the lens be placed?
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Physics Math Science

02/13/23

What is the magnification of the image?
The focal length of a diverging lens is negative. If f = −18 cm for a particular diverging lens, where will the image be formed of an object located 43 cm to the left of the lens on the optical axis?
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Physics Math Science

02/13/23

Compute the frequency (in MHz) of an EM wave with a wavelength of 1.4 in. (0.0356 m).
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Physics Math Science

02/13/23

The blackbody radiation emitted from a furnace peaks at a wavelength of 7.3 10-6 m (0.0000073 m). What is the temperature inside the furnace?
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Physics Math Science

02/13/23

how many turns must there be in the output coil?
The generator at a power plant produces AC at 26,000 V. A transformer steps this up to 355,000 V for transmission over power lines. If there are 2,250 turns of wire in the input coil of the... more
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02/13/23

Questions on Thermodynamics
Given that ΔHo(fusion,0°C) of water is 6025 J/mol, Cp,m(ice) = 37.7 J K–1 mol–1, and Cp,m(water,liquid) = 75.3 J K–1 mol–1, calculate ΔG (in J) for the freezing of 53 moles of water at 1 atm... more
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Physics

02/12/23

Why do we not have to calculate momentum here?
Two automobiles of equal mass approach an intersection. One vehicle is traveling with velocity 13.0 m/s toward the east and the other is traveling north with a speed of v2i . Neither driver sees... more
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Physics Math

02/12/23

how to Find the spring constant k and the mass m, can anyone help please.

The natural frequency of a spring-mass system is found to be 2 Hz. When an additionalmass of 1 kg is added to the original mass m, the natural frequency is reduced to 1 Hz. Findthe spring constant... more
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Physics

02/12/23

Physics Question
The acceleration of a particle moving only on a horizontal xy plane is given by ?→=5??ˆ+6??ˆa→=5ti^+6tj^, where ?→a→ is in meters per second-squared and t is in seconds. At t = 0, the position... more
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Physics Math

02/11/23

A sled of mass m = 22.0 kg is accelerated from rest on a frictionless, horizontal surface...
A sled of mass m = 22.0 kg is accelerated from rest on a frictionless, horizontal surface to a velocity of v = 12.5 m/s, as it travels from x = 0 to x = 30 m. The graph displays a graph of force... more
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Physics

02/11/23

An empty storage tank has a volume of 4,850 ft3. What is the buoyant force exerted on it by the air? (Assume the air is at 0°C and 1 atm.)
An empty storage tank has a volume of 4,850 ft3. What is the buoyant force exerted on it by the air? (Assume the air is at 0°C and 1 atm.)
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Physics

02/11/23

Physics Question
The acceleration of a particle moving only on a horizontal xy plane is given by ?→=5??ˆ+6??ˆa→=5ti^+6tj^, where ?→a→ is in meters per second-squared and t is in seconds. At t = 0, the position... more
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Physics

02/10/23

4. Two hockey players on ice skates push off each other. One has a mass of 60 kg. The other has a mass of 80 kg. a. If the 80 kg player moves back with a velocity of 3 m/sec. What is his momentum?
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Physics

02/10/23

Seen similar problems solved but when I solve this one the same way and put into cengage it tells me my answer is wrong. Not sure what I'm doing incorrectly.
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 19.0° below the horizontal. The negligent driver leaves the car in neutral, and the emergency brakes are... more
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Physics

02/09/23

A 57.6 kg pole-vaulter falls from rest from a height of 5.4 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.34 s after landing on the pad.
(a) Calculate the athlete's velocity just before reaching the pad.(b) Calculate the constant force exerted on the pole-vaulter due to the collision.
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Physics

02/09/23

Anne is working on a research project that involves the use of a centrifuge. Her samples must first experience an acceleration of 100g, but then, the acceleration must increase by a factor of seven.

Anne is working on a research project that involves the use of a centrifuge. Her samples must first experience an acceleration of 100g, but then, the acceleration must increase by a factor of... more
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Physics

02/09/23

Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the beach below with a

Bob has just finished climbing a sheer cliff above a beach and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the beach below with... more
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Physics

02/09/23

In a laboratory test of tolerance for high acceleration, a pilot is swung in a circle 12.0m in diameter. At what acceleration (in SI units) does the pilot blackout?

In a laboratory test of tolerance for high acceleration, a pilot is swung in a circle 12.0m in diameter.At what acceleration (in SI units) does the pilot blackout?Express this acceleration in terms... more
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Physics Math Science

02/09/23

What is the size of the smallest feature observable in human tissue when examined with 10-MHz  ultrasound?
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of the ultrasound waves themselves. What is the size of the smallest feature observable in human... more
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Physics Math Science

02/09/23

Approximately how many times louder is a 170-dB sound than a 90-dB sound?
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Physics

02/09/23

Can I meet with a client via Zoom?
Good evening!I have my first session tomorrow evening with 2 boys who need help on a project. One of the boys' moms is hiring me and wants us to meet on Zoom. She said she's had trouble with the... more
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