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
makkiz [27]
3 years ago
12

Which statements accurately describe elements? Check all that apply

Physics
1 answer:
GalinKa [24]3 years ago
7 0

Answer:

Elements are made up of only one type of atom. Each element has a unique chemical symbol. Elements can be identified by their atomic number.

You might be interested in
You want to build a search light. The search light is to have an outgoing parallel beam. You have a small, very bright light (a
andrew11 [14]

Answer:

1 m                              

Explanation:

Given

The mirror is a concave mirror.

Radius of curvature = 2 m

Now, for a parallel beam after reflection  occurs, the object should be placed at the focus of the mirror.

We know, focal length = radius of curvature / 2

                                      = 2 / 2

                                      = 1

Thus the focal length is 1 m.

Hence the object should be placed at 1 m from the concave mirror for parallel beam reflection.

3 0
3 years ago
What is meant by the term "observable universe"
Marta_Voda [28]

Answer:

The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time

Explanation:

6 0
3 years ago
if a sine wave representing ac voltage has an effective value of 70 vac what would be the waves peak value​
Morgarella [4.7K]

Answer:

99 V

Explanation:

The effective voltage of an AC current (also called rms voltage) is given by

V_{rms} = \frac{V_0}{\sqrt{2}}

where

Vrms is the rms voltage

V0 is the peak voltage

In this problem, we know the effective voltage:

V_{rms} = 70 V

Therefore, we can re-arrange the equation to find the peak voltage:

V_0 = V_{rms} \sqrt{2} =(70 V)(\sqrt{2})=99 V

3 0
3 years ago
A truck travels up a hill with a 5.4° incline. The truck has a constant speed of 25 m/s. What is the horizontal component of the
goldenfox [79]

Answer:

v_{x}=24.88m/s

v_{y}=2.35m/s

Explanation:

Knowing that the truck travels up a hill with a 5.4º incline

The horizontal component of the truck's velocity is:

v_{x}=vcos\beta=(25m/s)cos(5.4)=24.88m/s

The vertical component of the truck's velocity is:

v_{y}=vsin\beta=(25m/s)sin(5.4)=2.35m/s

8 0
3 years ago
A +3.4 x 10-6 C test charge experiences forces from two other nearby charges: a 3 N force due east and a 15 N force due west. Wh
Alecsey [184]

Answer:

3.53×10⁶ N/c due west

Explanation:

From the question

E = F'/q........................ Equation 1

Where E =  Electric Field, F = Net Force, q = Charge.

But,

F' = F₂-F₁...................... Equation 2

Substitute equation 2 into equation 1

E = (F₂-F₁)/q................ Equation 3

Given: F₁ = 3 N due east, F₂ = 15 N due west,  q = 3.4×10⁻⁶ C

Substitute these values into equation 1

E = (15-3)/(3.4×10⁻⁶)

E = 12/(3.4×10⁻⁶)

E = 3.53×10⁶ N/c due west

4 0
3 years ago
Other questions:
  • What would happen happen if a car crashes​
    14·1 answer
  • How do noise and vibration affect you when operating a boat?
    9·2 answers
  • IF YOU CAN TRY TO ANSER THIS AS FAST AS YOU CAN THANKYOU. Explain the relationship between physical activity, fitness, health, a
    5·2 answers
  • On your business card , you position your businesses as "the area's most creative cookery " this phrase is your
    11·1 answer
  • How are animals of the coniferous forest well adapted to long, cold winters?
    11·1 answer
  • The force required to start an object sliding across a uniform horizontal surface is larger than the force required to keep the
    5·1 answer
  • What happens to particle spacing when temperature increase, What we call this process?
    12·1 answer
  • Short answer
    8·1 answer
  • Please help ASAP....
    6·1 answer
  • An airplane flies with a constant speed of 560 miles per hour. How long will it take to travel a distance of 840 miles?​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!