05/20/20

Which color on the EM spectrum has the greatest speed?
Which color on the EM spectrum has the greatest speed?
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05/18/20

Write 8x2 − 5 + 7x4 − 9x − x5 in standard form.
A. −9x + 8x2 + 7x4 − 5 − x5 B. 8x2 − 5 + 7x4 − 9x − x5 C. −x5 + 7x4 + 8x2 − 9x − 5 D. −5 − 9x + 8x2 + 7x4 − x5
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05/04/20

Help for these physics questions please
Please help me. Thank you very much.1. Indicate which statement is true(T) or false(F)? If false then change the word or phrase in bold underlined to make it true._____ The acceleration of gravity... more
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12/03/19

Write 0.00123 in standard form
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12/03/19

Physics-Gravitational Force
Planet A has mass M kilograms and radius r meters. Planet B has mass 3.00 M kilograms and radius 1 2.00 r meters. If the acceleration due to gravity on planet A is 14.6 m/s2 then what is the... more
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11/18/19

In a paragraph, explain the life cycle of (i) a white dwarf, (ii) a neutron star, and (iii) ablack hole. You should cover every stage.
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10/17/19

Students connect a spring scale to a block on a rough horizontal surface.

The students use the spring scale to measure the magnitude of the horizontal force needed to pull the block at a constant speed. Which of the following statements explains why two forces exerted... more
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10/13/19

if i drop a ball out of a window that is 5.00m above ground, how long will it take to hit the ground? what is the acceleration of a north moving truck slowing down?
what is the acceleration of a north moving truck slowing down?what is the direction of acceleration of an eastward moving sprinter speeding up?how fast is 337m/s in mph?
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10/07/19

I dont understand math
A projectile is launched from ground level with an initial velocity of v0 feet per second. Neglecting air​ resistance, its height in feet t seconds after launch is given by s = -16 t 2 + v0 t.... more
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10/06/19

By how much vertical distance does the ball clear the crossbar? Answer in units of m
To win the game, a place kicker must kick a football from a point 21 m (22.9656 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the... more
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09/20/19

what is the acceleration of the crate?
A crate of mass 105 kg is pulled by a rope on a frictionless surface. The rope makes an angle of 40 0 above the horizontal. If the tension on the string is 938 N, what is the acceleration of the... more
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09/20/19

What is the acceleration of child and sled?
A child sitting on a sled is pulled by a rope along a frictionless surface. The child and the sled weigh 203 N and the horizontal force on the sled is 55 N. What is the acceleration of child and... more
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09/17/19

A batter hits a fly ball that reaches a height of 40 meters. If it comes down 50 meters from home plate, how long does the fielder have to get in position to catch it?
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09/16/19

Frictional Forces of a steep hill and a car
You live at the top of a steep (a slope of 15° above the horizontal) hill and must park your 2200 kg car on the street at night.a) you unwisely leave your car out of gear one night and your... more
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08/26/19

Suppose the width of your fist is 5.9 inches and the length of your arm is 26.9 inches. Based on these measurements, what will be the angular width (in degrees) of your fist held at arm’s length?
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08/17/19

What is the answer?
1. a worker pushes in 50.0 kg box on a level floor at constamt velocity and moves a distance of 10.0 m. If a person pushes it with a force of 850N, what must be the magnitude and the direction of... more
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06/21/19

What are the demographics of stars visible to the naked eye?
Of the stars that can be seen with the naked eye, what are the distributions of each type? For example, how many are main sequence? how many are Super Red giants/white dwarfs/neutron... more
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06/20/19

How is celestial navigation done on a low-level?
When we send a probe off to Jupiter or Saturn, or even Earth orbit, how are the rocket firings timed and coordinated?For instance, when I want to drive to another city I pull onto the highway and... more
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06/05/19

Why don't the relative positions of stars and other objects in a galaxy change over the year?
Though the identifiable stars in a constellation (say Andromeda) and a galaxy (say the Andromeda galaxy) are situated light years apart, why doesn't the galaxy appear at different positions with... more
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04/11/19

What is the evidence for a supermassive black hole at the center of Milky Way?
Black holes cannot be seen because they do not emit visible light or any electromagnetic radiation. Then how do astronomers infer their existence? I think it's now almost established in the... more
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01/05/19

find work done in increasing velocity of a body of mass 10 kg from 5m/s to 15m/s'.
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