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4 years ago

What are scientific units for describing an object that is acclerating

2 answers:

8 0

The SI unit for acceleration is meters/second squared
And if you are talking about speed, which pertains to velocity, it will be m/s or meters per second :)

Talja [164]4 years ago

7 0

The scientific unit for speed is kilometers per hour, hope this helps

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A 29.0 g ball is fired horizontally with initial speed v0 toward a 100 g ball that is hanging motionless from a 1.0 m long strin

balandron [24]

Answer:

$v_0 = 5.89 m/s$

Explanation:

As we know that the ball swings out to maximum angle of 50 degree

so we will have use energy conservation to find the initial speed of the ball

$\frac{1}{2}mv^2 = mgL(1 - cos\theta)$

$v = \sqrt{2gL(1 - cos\theta)}$

so we have

$v = \sqrt{2(9.81)(1)(1 - cos50)}$

$v = 2.65 m/s$

now we can use momentum conservation for this collision

$m_1v_0 = m_1v_{1f} + m_2v_{2f}$

$29 v_0 = 29v_{1f} + 100(2.65)$

$v_0 = v_{1f} + 9.14$

also we know that it is elastic collision

so we will have

$2.65 - v_{1f} = v_0$

now from above two equations we have

$v_0 = 5.89 m/s$

7 0

3 years ago

Convert 278000 into scientific notation

nirvana33 [79]

2.78 X 10^5 is the best answer to be responded to

8 0

3 years ago

Read 2 more answers

Clara's grandfather is a captain of a cargo ship. He prefers to navigate his ship through the moderate neap tides. At these time

spayn [35]

Answer:

The phases are the first and third quarters.

Explanation:

During the first quarter of the moon phases, the line between Earth and the Sun is at a right angle to the line between Earth and the moon. At this time the moon has completed the first quarter of its orbit around the earth. At this point, half of the moon is fully reflecting light from the sun.

Also during the third quarter which is the last quarter, the line between the earth and the sun is at a right angle to the line between the earth and the moon. This is the time when the second half of the moon which was not illuminated during the first quarter becomes completely illuminated.

6 0

3 years ago

Salem and Vernonville are 160 miles apart. A car leaves Salem traveling towards Vernonville, and another car leaves Vernonville

Paul [167]

Answer:

The speed of car leaves Vernonville = 45 miles per hour

The speed of car leaves Salem = 55 miles per hour

Explanation:

Given that distance between Salem and Vernonville = 160 miles

Lest take speed of car which leaves from Vernonville = V miles per hour

So the speed of car which leaves from Salem = V +10 miles per hour

These two car meet at time = 1 hr 36 min = 1.6 hr

Distance travel by car leaves from Salem = x

x= (V+10) x 1.6 --------1

Distance travel by car leaves from Vernonville = 160 - x

160 - x= V x 1.6 ----------2

From equation 1 and 2

160 - (V+10) x 1.6 = V x 1.6

V= 45 miles per hour

The speed of car leaves Vernonville = 45 miles per hour

The speed of car leaves Salem = 55 miles per hour

8 0

3 years ago

What is the work function of cadmium metal if light with = 9.85×1014hz is necessary to eject electrons?

Alika [10]

We use the Planck’s formula:

E = hv

where,

E = energy, h = planck’s constant = 6.6x10^-34 J s, v = frequency in Hz (Hz = 1 / s)

Subsituting the values to find for E:

E = (6.6×10^-34 J s) * 9.85×10^14 / s

E = 6.5x10^-19 J

3 0

3 years ago