1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Morgarella [4.7K]
3 years ago
14

A mover pushes a 255 kg piano

Physics
1 answer:
faust18 [17]3 years ago
7 0

Answer:

0.495 ms^{-2}

Explanation:

According to the newton's second law of motion we can apply F=ma hear

Force = mass * acceleration

(assume the piano is moving left side )

←F = ma

F_(pull)+ F_(push)= M*a\\77.5 + 48.7 = 255 *a\\a = 0.495 ms^{-2}

You might be interested in
what is the reaction of zinc nitrate mixed with silver. It's a lab and we are supposed to show what the difference, or any react
Vsevolod [243]

Answer:

b

Explanation:

3 0
3 years ago
If 40.0 kj of energy are absorbed by .500 kg of water 10 degrees c, what is the final temperature of the water?
anastassius [24]

To solve the problem, we must use the following equation:

Q=mC_s (T_f -T_i)

where

Q is the amount of heat energy absorbed by the water

m is the mass of the water

Ti and Tf are the initial and final temperature

Cs is the specific heat capacity of the water

The data we have in this problem are:

Q=40.0 kJ

C_s =4.186 kJ/kg^{\circ}C

T_i=10^{\circ}C

m=0.500 kg

Substituting the data into the equation and re-arranging it, we find

T_f = T_i + \frac{Q}{mC_s}=10^{\circ}+\frac{40.0 kJ}{(0.500 kg)(4.186 kJ/kg^{\circ}}=29.1^{\circ}C

So the final temperature of the water will be 29.1 degrees.

8 0
3 years ago
In the visible spectra of stars, absorption lines of hydrogen are produced when atoms are excited from n = 2 to higher levels (t
grigory [225]

Answer:

3. relatively high temperature, about 10,000 K, so that significant numbers of electrons are excited from the ground state, n = 1, to the first excited state, n = 2, but not too many of them have been ejected completely from the atoms

Explanation:

If hydrogen absorption lines are very strong in the visible spectrum of a particular star that means the population of electron in n = 2 is very high so on being exited they absorb radiation in Balmer series and give rise to absorption spectrum. The average temperature required to excite electron in hydrogen atom from n=1 to n = 2   is 10000K .

4 0
3 years ago
A truck starts from rest with an acceleration of 0.3 m/ S^2 find its speed in km/h when it has moves through 150 m​
goblinko [34]

Answer:

v = 34.128 km/hr

Explanation:

Given that,

The initial speed of a truck, u = 0

Acceleration of the truck, a = 0.3 m/s²

Distance moved, d = 150 m

Let the final speed of the truck is v. Using third equation of motion i.e.

v^2-u^2=2ad\\\\v=\sqrt{u^2+2ad}

Put all the values,

v=\sqrt{0^2+2\times 0.3\times 150}\\\\v=9.48\ m/s

or

v = 34.128 km/h

So, the final speed of the truck is equal to 34.128 km/h.

6 0
3 years ago
The Hubble Space Telescope (HST) orbits 569 km above Earth’s surface. Given that Earth’s mass is 5.97 × 1024 kg and its radius i
Kipish [7]
V (<span>HST’s tangential speed</span>) =  7570 m/s

4 0
4 years ago
Read 2 more answers
Other questions:
  • Given: an 802.11 wlan transmitter that emits a 50 mw signal is connected to a cable with 3 db loss. the cable is connected to an
    10·1 answer
  • Large wind turbines with a power capacity of 8 MW and blade span diameters of over 160 m are available for electric power genera
    12·2 answers
  • As an electric current forms an electric field, a(n) _______ is created in the phenomenon of electromagnetism.
    7·1 answer
  • One reason the skeletal system is important is because ?
    15·1 answer
  • How does mineral growth occur?
    14·2 answers
  • Find the force. 10 points. Will give brainliest!
    6·2 answers
  • The speed that light travels :
    6·2 answers
  • a sprinter starts from rest and accelerates at a rate of 0.16 ms ^-2 over a distance of 50.0 meters . How fast is the athlete tr
    6·1 answer
  • The electromagnetic spectrum includes radio waves inferared waves and x rays
    5·1 answer
  • Please Help!!
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!