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3 years ago

a teacher studies how the number of absent affects the final grade of their students. what would be the dependent variable?

Physics

1 answer:

Mrrafil [7]3 years ago

8 0

Answer:

Number of absent affects the grade

Explanation:

the dependent variable is the grade and the independent variable is the number of absent, since the grade depends of the number of absents.

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A machine can never be 100% efficient because some work is always lost due to which factor?

Pachacha [2.7K]

Answer:

A. can never be efficient due to friction

8 0

3 years ago

Read 2 more answers

A photoelectric experiment is performed where green light with a wavelength of 546.1 nm is shined on a metal plate, creating a p

PtichkaEL [24]

Answer:

$\phi=1.55 [eV]$

Explanation:

We can use the work function equation for a photoelectric experiment:

$\phi=\frac{hc}{\lambda}-K_{max}$

h is the plank constant
c is the speed of light
λ is the wave length
K is the kinetic energy (or K=eΔV)

So we will have:

$\phi=\frac{hc}{\lambda}-e\Delta V$

$\phi=\frac{6.63*10^{-34}*3*10^{8}}{546.1*10^{-9}}-0.728eV$

$\phi=3.64*10^{-19}[J]-0.728 [eV]$

$\phi=(3.64*10^{-19}[J]*\frac{1eV}{1.6*10^{-19}[J]})-0.728 [eV]$

$\phi=2.28 [eV] - 0.728 [eV]$

$\phi=1.55 [eV]$

I hope it helps you!

8 0

4 years ago

Read 2 more answers

Jupiter has a magnetic field that is a. much stronger than that of Earth and greatly extended. b. very strong and localized clos

irina [24]

Answer:

a. much stronger than that of Earth and greatly extended.

Explanation:

Jupiter is a gas giant. It mainly consists of hydrogen and helium and also may have rocky core. Jupiter has the fastest rotational period among the planets of the solar system. One day on Jupiter lasts for 11 hours. This rotation causes the hydrogen in the atmosphere to rotate at great speed.

The rotation of the hydrogen generates the magnetic field of Jupiter. It is almost 14 times greater than the Earth's magnetic field in terms of strength and the second largest in terms of distance after the sun.

7 0

3 years ago

If the acceleration of an object is zero, then that object cannot be moving.

larisa86 [58]

Answer:

False

Explanation:

Because acceleration just means that the speeds getting faster he could already be going at a same rate of speed and it wouldn't be counted as acceleration because acceleration would be if he increased the speed

4 0

3 years ago

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 118 km

ruslelena [56]

Answer:

x component 60.85 m

y component 101.031 m

Explanation:

We have given distance r = 118 km

Angle which makes from ground = 58.9°

(a) X component of distance is given by $r_x=rcos\Theta =118\times cos58.9=118\times 0.5165=118=60.85m$

(b) Y component of distance is given by $r_Y=rcos\Theta =118\times sin58.9=118\times 0.8562=101.0316m$

These are the x and y component of position vector

6 0

3 years ago