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
DerKrebs [107]
4 years ago
6

Joan wants to take a 30.0N object up to the 3rd floor of her office building,which is 10m above the ground floor.It is too big t

o fit through the doors,however,so she uses a crane to get it up the 3rd floor window.How much power will the crane need to exert in order to do this in 5.00s?
Physics
1 answer:
34kurt4 years ago
5 0
P=W/t
P=F×s/t
P=30×10/5= 60 W
You might be interested in
If the bonds in the reactants of Figure 7-3 contained 432 kJ of chemical energy and the bonds in the
Yuri [45]

Answer:

  • <u>The energy change would be 46kJ</u>
  • <u>The energy would be absorbed</u>

Explanation:

The <em>energy change </em>during a chemical reation, i.e. the reaction energy, is equal to the chemical energy stored in the<em> bonds of the products </em>less the chemical energy stored in the <em>bonds of the reactants</em>.

Hence:

  • <em>Energy change</em> = 478 kJ - 432kJ = 46kJ

The change is positive, this is, the chemical energy of the products is greater than the chemical energy of the reactants.

That corresponds to the second graph, where the level of the energy of the products in the graph is higher than the level of the energy of the reactants. Therefore, the conclusion is that the reaction <em>absorbed energy</em> and it is endothermic.

4 0
3 years ago
#1 What materials is each part of the flashlight made of? (A flashlight will include wires,a light bulb,a lens, a reflector ,and
s344n2d4d5 [400]

Explanation:

Question 1

1.The wires are made of conducting materials e.g copper

2. A light bulb is made of filament material e.g tungsten with gases enclosed in a glass material

3.The lens is made of transparent glass material

4 The reflector is made of plastic with silver lining

5. The exterior casing of most flash lights are made of plastic

Question 2.

1.Copper is used to conduct electric current from the battery to the bulb

2.The tungsten filament ignite the gases and causes it to glow

3. The lens covers the lamp on your flashlight so that the glass on the lamp

/bulbs does not get broken.

4.The reflector redirects the light rays from the lamp, creating a steady beam of light, which is the light you see emitting from the flashlight.

5. The exterior cases houses the entire assembly and makes the flash light handy for use

4 0
3 years ago
If a cart goes around a turn at 20 km/h ,what remains constant
Vitek1552 [10]

Answer: 4.speed

Explanation:

In this case, we know that the cart remains at a constant 20km/h.

Now, one could say that "the velocity remains constant, because it always is 20km/h"

But remember that velocity is a vector, so this has a direction, and if the cart is going around a turn, then the direction of motion is changing, which tell us that there is acceleration.

But the module of the velocity, the speed, remains constant at 20km/h.

Then the correct option is 4, speed.

7 0
3 years ago
If you poke a hole into a plastic bottle, and stick a straw in it, and then let the straw connect to a glass cup, and then blow
den301095 [7]
It was decrease because the water js going from one place to another
6 0
3 years ago
A generator makes electricity from _____ A. Chemical reactions B. Friction C. Kinetic energy D. Heat
coldgirl [10]

Answer:

The answer is C. Kinetic energy

Explanation:

Generators don't actually create electricity. Instead, they convert mechanical or chemical energy into electrical energy. They do this by capturing the power of motion and turning it into electrical energy by forcing electrons from the external source through an electrical circuit.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Two person A and B of weight 60kg and 40kg respectively stand facing each other, and pull on a light rope streched between them.
    7·1 answer
  • Solve for x. 4(x+1)≤4x+3
    13·2 answers
  • which of the following statements best explains how consumers determine growth in technological areas
    6·1 answer
  • 6. On a quiet day, the atmospheric pressure results in a force of about 10,0000 N on a window pane with an area of 1 square mete
    7·1 answer
  • The demand equation for the Roland portable hairdryer is given as follows where x (measured in units of a hundred) is the quanti
    13·1 answer
  • Are any minerals flammable
    11·2 answers
  • Isaac Newton used a ____ to break white light into its component colors.
    11·2 answers
  • The particles of a GAS within a closed container will collide with the container walls, exerting a FORCE. The force per unit of
    5·2 answers
  • Sound waves can be modeled by the equation of the form y=20sin(3t+theta). Determine what type of interference results when sound
    11·1 answer
  • Why are digital signals more reliable in transmitting information than analog signals?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!