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2 years ago

Which of the following elements are most likely to have similar chemical properties?

Physics

1 answer:

NNADVOKAT [17]2 years ago

5 0

Answer:

transition metal, and inner transition metals groups are numbered 1-18 from left to right

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A box slides down a ramp inclined at 24◦ to the horizontal with an acceleration of 1.7 m/s 2 . The acceleration of gravity is 9.

dsp73

Answer:

Explanation:

In friction, the coefficient of friction formula is expressed as;

$\mu = \frac{F_f}{R}$

Ff is the frictional force = Wsinθ

R is the reaction = Wcosθ

Substitute inti the equation;

$\mu = \frac{Wsin \theta}{W cos\theta} \\\mu = \frac{sin \theta}{cos\theta} \\\mu = tan \theta$

Given

θ = 24°

$\mu = tan 24^0\\\mu = 0.445\\$

Hence the coefficient of kinetic friction between the box and the ramp is 0.445

3 0

3 years ago

10 PTS. If an electromagnetic wave has a frequency of 8 ⋅ 10^14 H z , what is its wavelength? Use λ=V/F. The speed of light is 3

ad-work [718]

Answer :

The wavelength would be 410 m/s

3 0

3 years ago

Define torque qualitatively and quantitatively.

abruzzese [7]

When you use a wrench to tighten or loosen a nut on a bolt, you are applying torque. It is measured in units of force times distance. A force of F newtons pulling on a handle of L meters in length would supply a torque of F L newton-meters. More technically, torque is the vector cross product of force times perpendicular distance from the object, F x r = F r sin @

4 0

3 years ago

Read 2 more answers

A jet with mass m = 5 × 104 kg jet accelerates down the runway for takeoff at 1.9 m/s2. What is the net vertical force on the ai

OLEGan [10]

The first sentence got me all psyched up to answer the question "What
horizontal force do the engines generate in order to accelerate it ?".

But the actual question, in the second sentence, turned out to be
a completely different one.

When the plane levels off and continues on at a constant altitude, it's
not accelerating up or down, so the net vertical force on it is zero.
The lift generated by the wings is exactly balancing the downward
force of gravity on the airplane.

3 0

3 years ago

If a motorbike of mass 150 kg moving with the speed of 36 km/hr produces

Aloiza [94]

Answer:

P = 7500 [W]

Explanation:

First We must use Newton's second law to find the force. Newton's Second Law tells us that the sum of forces on a body is equal to the product of mass by acceleration.

∑F = m*a

where:

m = mass = 150 [kg]

a = acceleration = 5 [m/s²]

$F = 150*5\\F = 750 [N]$

We know that the work is determined by multiplying the force by the distance, in this way the units of the work are [N*m] which corresponds to 1 Joule [J].

And the power is determined by dividing the work by the time, in this way we have that [J/s] corresponds to 1 [W].

We must convert the speed from kilometers per hour to meters per second.

$36[km/hr]*1000[\frac{m}{1km}]*[\frac{1hr}{3600s} ]=10 [m/s]$

$P=F*v$

where:

P = power [W]

F = force = 750 [N]

v = 10 [m/s]

$P = 750*10\\P = 7500 [W]$

8 0

2 years ago