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
Serga [27]
3 years ago
8

Using this information...

Physics
1 answer:
Pepsi [2]3 years ago
6 0

19.2\:\text{m/s}

Explanation:

At the top of the tree, the velocity of the pebble is purely horizontal so we can calculate it as

v_{y} = v_{0y} = v_0\cos 40° = (25\:\text{m/s})(0.766)

\:\:\:\:\:= 19.2\:\text{m/s}

You might be interested in
Electrical shock is more likely to be fatal when the path of current is through the
skad [1K]
Electrical shock is most likely to be fatal when the path of the current is through the heart.
4 0
3 years ago
An asteroid is moving along a straight line. A force acts along the displacement of the asteroid and slows it down. The asteroid
Setler79 [48]

Answer:

a)

- 7.04\times10^{11} J

b)

5.03\times10^{5} N

Explanation:

a)

m = mass of the asteroid = 43000 kg

v_{o} = initial speed of asteroid = 7600 m/s

v = final speed of asteroid = 5000 m/s

W = Work done by the force on asteroid

Using work-change in kinetic energy theorem

W = (0.5) m (v^{2} - v_{o}^{2})\\W = (0.5) (43000) (5000^{2} - 7600^{2})\\W = - 7.04\times10^{11} J

b)

F = magnitude of force on asteroid

d = distance traveled by asteroid while it slows down = 1.4 x 10⁶ m

Work done by the force on the asteroid to slow it down is given as

W = - F d\\- 7.04\times10^{11} = - F (1.4\times10^{6})\\F = 5.03\times10^{5} N

4 0
3 years ago
Does the car's<br> speed alone<br> determine<br> whether the egg<br> breaks?
blsea [12.9K]

Answer:

yes it is

Explanation:

when the speed increases the car will vibration than egg will breaks

4 0
2 years ago
Read 2 more answers
When must batteries in an emergency locator transmitter (ELT) be replaced or recharged, if re-chargeable?
tatiyna

Answer:

After one half of the battery's useful life.

Explanation:

Batteries of the emergency locator transmitter (ELT) must be replaced or recharged after one half of the battery's useful life because if it is exposed to the high temperature for a long period of time such as the air plane parked in the sun will result in the deterioration of battery which may makes the transmitter out of order before the expiry  date of the battery. So it will be safe to do that after the use of one half of the battery's life.

6 0
3 years ago
Just number 9 I need help !!!!
Deffense [45]
Magnesium is in group 2 while sulfur is in group 6.

the group number determines the number of valence electrons.

Metals gives lose electrons (mg)
Non Metals gain electrons (s)

answer: Magnesium gives 2 electrons to sulfur.

Mg is now 2.8
Sulfur is 2.8.8

cuz ionic bonding
8 0
3 years ago
Other questions:
  • If Abdul pedals his 20 kg bike with a force of 100 N, what will the bike’s acceleration be? The formulas above may be helpful in
    14·1 answer
  • Two particles with the same charge will repel each other. True or false
    14·1 answer
  • A car slow down at -5.00 m/s2 until it comes to a stop after traveling 15.0 m. What was the initial speed of the car? (Unit=m/s)
    14·2 answers
  • One of China's cement factories has become more energy efficient by ________. a. using the extra gas and heat from the kilns to
    12·1 answer
  • A(n) 30 kg boy rides a roller coaster. The acceleration of gravity is 9.8 m/s 2 . With what force does he press against the seat
    5·1 answer
  • In Millikan's oil drop experiment an oil drop is at rest between two large plates separated by 1.3 cm when the potential differe
    11·1 answer
  • A car’s headlights dissipate 40 W on low beam and 50 W on high beam. Is there more or less resistance in the high-beam filament?
    6·1 answer
  • You run a race with your friend. At first you each have the same kinetic energy, but then you find that she is beating you. When
    14·1 answer
  • What is the acceleration of a Porsche that can go from 15 mi/hr to 75 mi/hr in 4 seconds?
    15·2 answers
  • Light does not pass through some materials. What do you think happens
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!