1,302 Answered Questions for the topic physical science

Physical Science

01/27/21

a cheetah and a gazelle are grazing in the savannah. The gazelle is 275 meters away form the gazelle safe zone and the cheetah is 455 meters away.

If the gazelle can run at 25m/s and the cheetah runs at 65m/s will the gazelle get to safety? If not how fast does the gazelle need to run to beat the cheetah by 2 seconds?
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Physical Science

01/20/21

Speed & Acceleration

Falling objects drop with an average acceleration of 9.8 m/s/s. if an object falls from a tall building, how long will it take before it reaches a speed of 49 m/s
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Physical Science

01/19/21

reactivity determined by an elements
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Physical Science

01/12/21

How much work is required to move a 50n box 2meters

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Physical Science Science English Highschool

01/06/21

create a paragraph for science class using these words

use the words that are bolded the rest is the meaning Element- a substance with atoms that are all alikeMatter- Anything that has mass and takes up space Solid- state of matter that has a definite... more
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Physical Science Math Science Physics

12/17/20

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 7 cm forms an image of a small object placed 11 cm in... more
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Physical Science Math Science Physics

12/17/20

Determine the location of the image formed by the lens.

A small object is placed to the left of a convex lens and on its optical axis. The object is 32 cm from the lens, which has a focal length of 14 cm. Determine the location of the image formed by... more
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Physical Science

12/16/20

A car traveling at 10m/s starts to decelerate steadily. It comes to a complete stop in 20 seconds. What is the car’s acceleration?

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Physical Science

12/15/20

Calculate the velocity of a 0.8 kg kitten with a momentum of 5 kg*m/s.
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Physical Science Math Science Physics

12/15/20

 When an object 1.8 m (180 cm) away is being photographed, what is the magnification?
A camera is equipped with a lens with a focal length of 32 cm. When an object 1.8 m (180 cm) away is being photographed, what is the magnification?
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Physical Science Math Science Physics

12/15/20

When an object 1.6 m (160 cm) away is being photographed, how far from the film should the lens be placed?
A camera is equipped with a lens with a focal length of 22 cm. When an object 1.6 m (160 cm) away is being photographed, how far from the film should the lens be placed?
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Physical Science Math Science Physics

12/15/20

What is the magnification of the image?
The focal length of a diverging lens is negative. If f = −16 cm for a particular diverging lens, where will the image be formed of an object located 41 cm to the left of the lens on the optical... more
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Physical Science Math Science Physics

12/15/20

What is the magnification?
When viewed through a magnifying glass, a stamp that is 1.2 cm wide appears upright and 5.6 cm wide. What is the magnification?
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Physical Science Math Science Physics

12/15/20

How far from the lens (in cm) must the object be placed to accomplish this task, if the final image is located 20 cm from the lens?
A 2.8 cm-tall object stands in front of a converging lens. It is desired that a virtual image 2.4 times larger than the object be formed by the lens. How far from the lens (in cm) must the object... more
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Physical Science

12/15/20

please help me !! :(

Calculate the kinetic energy contained in a 25 kg bicycle travelling at 10 m/s. Show all work for full credit. (KE=1/2 mv2)
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Physical Science

12/11/20

please help me please!! :(
Calculate the current in the above circuit when closed, for a 1.5 V battery and a 3 Ω bulb
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Physical Science

12/11/20

please help me!! :(
Briefly explain why you cannot hear sound in space in one or two sentences. You must use at least four of the following terms correctly (wave, vacuum, seismic, medium, mechanical, visible,... more
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Physical Science

12/11/20

please help me!! :(
Calculate the kinetic energy contained in a 25 kg bicycle travelling at 10 m/s.
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Physical Science

12/11/20

please help me!! :(
Identify the type of energy(ies) contained in each step of this energy transformation.
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Physical Science

12/10/20

This question is typical on some driver's license exams: A car moving at 50 km/hkm/h skids 15 mm with locked brakes. How far will the car skid with locked brakes at 110 km/hkm/h ?
This question is typical on some driver's license exams: A car moving at 50 km/hkm/h skids 15 mm with locked brakes. How far will the car skid with locked brakes at 110 km/hkm/h ?
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Physical Science Math Science Computer

12/10/20

Compute the frequency (in MHz) of an EM wave with a wavelength of 5.3 in. (0.1346 m).
Compute the frequency (in MHz) of an EM wave with a wavelength of 5.3 in. (0.1346 m).
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Physical Science Science Physics Algebra

12/10/20

how many turns are there in the output coil?
The charger cord used to recharge a cell phone contains a transformer that reduces 120 V AC to 4 V AC. For each 1,225 turns in the input coil, how many turns are there in the output coil?
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Physical Science Math Science Physics

12/10/20

What is the temperature inside the furnace?
The blackbody radiation emitted from a furnace peaks at a wavelength of 4.1  10-6 m (0.0000041 m). What is the temperature inside the furnace?
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Physical Science Math Science Physics

12/10/20

how many turns must there be in the output coil?
The generator at a power plant produces AC at 19,000 V. A transformer steps this up to 355,000 V for transmission over power lines. If there are 1,850 turns of wire in the input coil of the... more
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Physical Science Math Science Physics

12/10/20

How much energy does it use during 20 min of operation?
The resistance of an electric heater is 85 Ω when connected to 120 V. How much energy does it use during 20 min of operation?
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